Hazard Plain Automated baseline

Tioga County, PA

Risk-assessment baseline packet

County FIPS:
42117
Release:
2026-10
Data as of:
2026-09-30
Storm Events data through:
2026-06-30

Hazard Plain is an independent product built from public federal data. It is not a FEMA document and is not reviewed or endorsed by FEMA or any state agency.

Hazard Plain release 2026-10, as of 2026-09-30.

Summary

Plan status as of 2026-09-30: No county-level plan row in FEMA data.

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Inland Flooding ($16,321,065 a year), Hurricane ($620,229) and Strong Wind ($558,144).

The tables that follow are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); each heading says which item its tables support.

Plan clock

No county-level plan row in FEMA data

What changed since your last plan

Not available. No county-level plan row in FEMA data, so there is no approval date to count from.

Sources: 1, 2, 4, 6 (numbered list at the end)

Plan status for every jurisdiction listed in this county: 42 rows, in the section "Plan clock: Plan status for every jurisdiction listed in this county" on the following pages.

State plan status and tribal plans in this state: see the state page.

Plan clock

Plan status for every jurisdiction listed in this county

Source: 1

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Blossburg boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Elkland boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Knoxville boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Lawrenceville boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Liberty boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Mansfield boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Roseville boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Tioga boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Wellsboro boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Westfield boroughOrganized BoroughApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Bloss townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Brookfield townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Charleston townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Chatham townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Clymer townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Covington townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Deerfield townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Delmar townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Duncan townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Elk townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Farmington townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Gaines townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Hamilton townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Jackson townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Lawrence townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Liberty townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Middlebury townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Morris townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Nelson townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Osceola townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Putnam townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Richmond townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Rutland townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Shippen townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Sullivan townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Tioga townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Union townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Ward townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Westfield townshipTownshipApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progress
Elkland Borough AuthoritySpecial DistrictApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220
Mansfield UniversityCollege/UniversityApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220FEMA tracker shows a plan in progressthis jurisdiction approved 2023-09-12
Watrous Water AuthorityWater/Sewer AuthorityApproved, expires 2027-05-08Tioga County Hazard Mitigation Plan (FEMA plan 108024)2022-05-092027-05-08220this jurisdiction approved 2025-08-19

Supports FEMA checklist item B1-a: hazard identification

Hazards NRI does not cover (local data needed)

  • dam failure (incl. upstream dams)
  • levee failure
  • flash flood as its own subtype
  • ice jams
  • debris flows
  • erosion (riverine and coastal)
  • land subsidence and sinkholes
  • expansive soils

The 18 National Risk Index hazards, ranked by expected annual loss (EAL)

Sources: 5, 6

Rank by EALHazardNRI risk ratingEAL ratingEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL total (see note)modeled dollars per yearStorm Events records, 1996 to 2026-06-30countStorm Events coverage note
1Inland FloodingRelatively ModerateRelatively Moderate$16,263,998$7,244$49,824$16,321,06550
2HurricaneRelatively LowRelatively Low$510,873$94,206$15,150$620,2291
3Strong WindRelatively ModerateRelatively Moderate$51,542$1,187$505,415$558,144204Includes 12 High Wind and 2 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition).
4TornadoVery LowVery Low$147,427$995$147,322$295,7455
5LightningRelatively ModerateRelatively Low$2,339n/a$278,179$280,5181
6Winter WeatherRelatively ModerateRelatively Moderate$10,969$55$138,779$149,80389
7Cold WaveVery LowRelatively Low$690$330$126,181$127,20022
8EarthquakeVery LowVery Low$63,620n/a$11,626$75,246Storm Events does not record earthquakes.
9HailVery LowVery Low$9,336$10,771$18,125$38,23239
10Heat WaveVery LowVery Lowunder $1$1,873$33,922$35,7951
11Ice StormRelatively LowRelatively Low$24,656n/a$3,725$28,38111
12LandslideRelatively LowRelatively Low$2,425n/a$16,028$18,4530Declared 1 time; no Storm Events record of this type.
13WildfireVery LowVery Low$5,089$27$1,905$7,0210No recorded events in Storm Events since 1996 (data through 2026-06-30).
14AvalancheRelatively LowVery Lowunder $1n/a$4,250$4,2500No recorded events in Storm Events since 1996 (data through 2026-06-30).
15DroughtNo RatingNo Expected Annual Lossesn/a$0n/a$07

Total = buildings + agriculture + population equivalence; FEMA values each expected death (or 10 injuries) at $13.7 million (2024 dollars).

NRI risk rating combines expected annual loss with social vulnerability and community resilience; EAL rating rates expected annual loss alone. Both compare this county with all U.S. counties.

Local data needed: state and local landslide and wildfire records (Storm Events records these hazards only in part).

Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: coastal flooding, tsunami and volcanic activity. That is the evidence for leaving them out of the plan.

The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.

Supports FEMA checklist item B1-b: hazard location

Affects the whole county (national data give no location within it): Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather.

Inland Flooding: The FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.

Hazards that vary within the county: highest-rated census tracts

Source: 5

HazardHighest-rated census tractsNRI risk rating, score 0 to 100
Avalanchetract 9503 (Very Low, 63.5); tract 9509 (Very Low, 63.5); tract 9505 (Very Low, 63.2)
Earthquaketract 9508 (Very Low, 35.4); tract 9506 (Very Low, 33.8); tract 9507 (Very Low, 27.9)
Hurricanetract 9507 (Relatively Low, 77.4); tract 9506 (Relatively Low, 77.0); tract 9505 (Relatively Low, 76.4)
Landslidetract 9509 (Relatively Moderate, 97.7); tract 9504 (Relatively Low, 95.2); tract 9510 (Relatively Low, 95.1)
Tornadotract 9507 (Relatively Low, 45.4); tract 9506 (Relatively Low, 43.3); tract 9505 (Relatively Low, 41.5)
Wildfiretract 9507 (Relatively Low, 71.7); tract 9501 (Very Low, 68.0); tract 9505 (Very Low, 67.4)

Up to 3 census tracts per hazard, highest National Risk Index rating first, then highest score; a tract number is the Census tract number (for example 9503 is Census Tract 9503). FEMA's Resilience Analysis and Planning Tool maps the National Risk Index for every tract: https://www.fema.gov/emergency-managers/practitioners/resilience-analysis-and-planning-tool

Supports FEMA checklist item B1-c: hazard extent

Extent: scale, observed range and worst recorded event per hazard

Sources: 6, 7

HazardScaleRecordscount and yearsObserved rangeWorst recorded eventMost damaging (when different)How it applies to jurisdictionsNote
Avalanchenone (count and damage only)0
Cold/Wind Chill, Extreme Cold/Wind Chillwind chill22 records, 2004 to 2026 (22 zone-level)1 day to 4 days (median 2 days); 22 with a recorded value4 consecutive days, 2007-02-03 to 2007-02-06, zone-levelCountywide (zone-level records).
Frost/Freeze (outside NRI's Cold Wave definition)crop damage0
DroughtU.S. Drought Monitor scale (D0 to D4)7 records, 1997 to 2020 (7 zone-level)1 day to 70 days (median 31.5 days); 4 with a recorded value70 days (about 2.3 months), 2020-09-22 to 2020-11-30, a run of 3 consecutive Storm Events drought records, zone-levelCountywide (zone-level records).Storm Events enters a drought at D2 or worse east of the Rockies and D3 or worse from the Rockies west (NWS Instruction 10-1605); NRI drought counts D3 and D4 only.
EarthquakeModified Mercalli (local data)0Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hailhail size (inches)54 records, 1967 to 20250.75 in to 2.5 in (median 1 in); 54 with a recorded value2.5 in hail, 2002-05-31Hail, 2009-06-26, $5,000 property; $0 crops (2009 dollars)Event records naming jurisdictions in the plan: Wellsboro borough (10 records), Mansfield borough (7 records), Blossburg borough (3 records), Liberty borough (3 records), Liberty township (3 records), Covington township (2 records), Elkland borough (2 records), Lawrenceville borough (2 records), Knoxville borough (1 record), Morris township (1 record); and 4 more jurisdictions (see the Excel file).
Excessive Heat, Heatheat index (in event narratives)1 record, 2025 (1 zone-level)1 day; 1 with a recorded value1 consecutive day, 2025-06-23, zone-levelCountywide (zone-level records).
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson1 record, 2003 (1 zone-level)Strongest recorded: Tropical Storm record, 2003-09-18 to 2003-09-19, damage not reported; NWS zone PAZ037Countywide (zone-level records).Storm Events files every zone of a storm's episode under the storm's type; flooding from the storm is filed as Flood or Flash Flood records.
Ice StormSperry-Piltz ice scale (local data)11 records, 1997 to 2008 (11 zone-level)No damage reported in 11 records.Countywide (zone-level records).
Flash Flood, Flood, Lakeshore Flooddamage and flood days (flood depth: FIRM)50 records, 1996 to 2026 (10 zone-level)Flash Flood, 1996-11-08, $2,500,000 property; $0 crops (1996 dollars)Event records naming jurisdictions in the plan: Wellsboro borough (5 records), Elkland borough (3 records), Roseville borough (3 records), Knoxville borough (2 records), Westfield borough (2 records), Westfield township (2 records), Blossburg borough (1 record), Charleston township (1 record), Lawrenceville borough (1 record), Mansfield borough (1 record); and 5 more jurisdictions (see the Excel file). Zone-level records (10) apply countywide.Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage is often $0 or blank for floods, major ones included; FEMA Public Assistance by declaration (B1-d) shows which floods cost the most.
Debris Flownone (count and damage only)0
Lightningannualized frequency (the measure FEMA's Local Mitigation Planning Handbook names)1 record, 2005Lightning, 2005-08-13, damage not reported, 1 direct injuryEvent records naming jurisdictions in the plan: Covington township (1 record).Storm Events lists lightning with damage or casualties.
High Wind and Strong Wind (outside NRI's Strong Wind definition)wind speed (kt and mph)14 records, 1999 to 2026 (14 zone-level)39 kt (45 mph) to 63 kt (72 mph) (median 50 kt (58 mph)); 13 with a recorded value63 kt (72 mph) measured, High Wind, 2002-02-01; NWS zone PAZ037Strong Wind, 2026-02-22, $30,000 property; $0 crops (zone total, 2026 dollars)Countywide (zone-level records).
Thunderstorm Windwind speed (kt and mph)238 records, 1971 to 202643 kt (49 mph) to 87 kt (100 mph) (median 52 kt (60 mph)); 171 with a recorded value87 kt (100 mph) estimated gust, Thunderstorm Wind, 2025-03-16Thunderstorm Wind, 1994-08-02, $1,500 property; $500,000 crops (1994 dollars)Event records naming jurisdictions in the plan: Mansfield borough (21 records), Wellsboro borough (21 records), Lawrenceville borough (11 records), Liberty borough (10 records), Liberty township (10 records), Osceola township (9 records), Blossburg borough (8 records), Knoxville borough (8 records), Charleston township (7 records), Covington township (7 records); and 6 more jurisdictions (see the Excel file).
TornadoEnhanced Fujita (Fujita before Feb 2007)7 records, 1970 to 2019F/EF0 to F/EF2 (median F/EF1); 7 with a recorded valueF2 tornado, 1983-05-02, 9.8 mi path length (whole path, pre-1996), 30 yd wide, $2,500,000 property; crops not recorded (1983 dollars)Event records naming jurisdictions in the plan: Tioga borough (2 records), Tioga township (2 records), Knoxville borough (1 record).Before 1996 a tornado is listed once, under the county where it began, with its whole path's rating and length; from 1996 on, each county lists its own segment. Length is not used to rank tornadoes (see Methods).
Wildfireacres burned (local data)0
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall: local data)89 records, 1996 to 2026 (89 zone-level)Winter Weather, 2024-03-20, $15,000 property; $0 crops (2024 dollars); NWS zone PAZ037Countywide (zone-level records).

Where a hazard names more than 10 jurisdictions, the table lists the 10 with the most records; every one is in the Excel file, sheet "B1-c Extent".

In event narratives only (local data needed): wind chill, temperature, heat index, ice thickness, acres burned and snow depth; any physical measure of avalanche, debris flow and lightning.

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records from zones that no NWS zone-county file places in this county (mostly before 2020) are not counted here (the Methods page explains the zone matching).

Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.

Supports FEMA checklist item B1-d: previous occurrences

Federal declarations for this county: 20 declarations covering 15 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).

No county-level plan row in FEMA data, so there is no approval date to count from.

Federal disaster declarations for this county

Sources: 1, 2, 3

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsFlagsNotes
2024-09-112024-08-09DR-4815-PAMajor disasterTropical Storm DebbyHurricane (primary); also designated: Inland Flooding$7,408,636.35within last 5 years
2020-03-302020-01-20DR-4506-PAMajor disasterCOVID-19 PandemicNon-natural, not counted$62,148.50
2020-03-132020-01-20EM-3441-PAEmergencyCOVID-19Non-natural, not countedno Public Assistance recordedsame incident as DR-4506
2018-11-272018-08-10DR-4408-PAMajor disasterSevere Storms and FloodingInland Flooding$222,029.86
2012-10-292012-10-26EM-3356-PAEmergencyHurricane SandyHurricaneno Public Assistance recorded
2011-09-122011-09-03DR-4030-PAMajor disasterTropical Storm LeeInland Flooding (primary); also designated: Hurricane$591,337.35
2011-09-082011-09-03EM-3340-PAEmergencyRemnants of Tropical Storm LeeInland Flooding (primary); also designated: Hurricaneno Public Assistance recordedsame incident as DR-4030
2011-07-132011-04-25DR-4003-PAMajor disasterSevere Storms and FloodingInland Flooding$2,843,605.37
2006-06-302006-06-23DR-1649-PAMajor disasterSevere Storms, Flooding, and MudslidesInland Flooding; Landslide$146,961.14
2005-09-102005-08-29EM-3235-PAEmergencyHurricane KatrinaHurricane: evacuation support, not a local hazard event; not countedno Public Assistance recorded
2004-09-192004-09-17DR-1557-PAMajor disasterTropical Depression IvanHurricane$473,712.49
2004-09-192004-09-08DR-1555-PAMajor disasterSevere Storms and Flooding Associated with Tropical Depression FrancesHurricane; Inland Flooding: designated for Hazard Mitigation only (no Public or Individual Assistance for this county); not countedPA not declared for this county
2003-08-232003-07-21DR-1485-PAMajor disasterSevere Storms, Tornadoes, and FloodingInland Flooding; Tornado$488,278.90
1996-12-231996-11-08DR-1150-PAMajor disasterSevere Thunderstorms, High Winds,Rain, FloodingInland Flooding (primary); also designated: Strong Windno Public Assistance recorded
1996-01-211996-01-19DR-1093-PAMajor disasterSevere Storms and FloodingInland Floodingno Public Assistance recorded
1993-03-161993-03-13EM-3105-PAEmergencySevere Snowfall & Winter StormWinter Weatherno Public Assistance recorded
1977-01-291977-01-29EM-3026-PAEmergencySnowstormsWinter Weatherno Public Assistance recorded
1976-07-071976-07-07DR-513-PAMajor disasterHigh Winds, Flash FloodsInland Floodingno Public Assistance recorded
1975-09-261975-09-26DR-485-PAMajor disasterSevere Storms, Heavy Rains & FloodingInland Floodingno Public Assistance recorded
1972-06-231972-06-23DR-340-PAMajor disasterTropical Storm AgnesInland Flooding (primary); also designated: Hurricaneno Public Assistance recorded

County Public Assistance: applicants the FEMA record places in this county, including any state agencies FEMA files there; statewide rows are listed on the state page; federal share obligated, nominal dollars.

Statewide declarations

Source: 2

DeclaredIncident beganFEMA numberTypeTitleMapped hazard
1959-01-231959-01-23DR-89-PAMajor disasterFloodsInland Flooding
1956-08-091956-08-09DR-61-PAMajor disasterStormHazard not mapped (severe storm title names no single hazard); not counted
1956-05-211956-05-21DR-58-PAMajor disasterSevere StormHazard not mapped (severe storm title names no single hazard); not counted
1956-03-151956-03-15DR-51-PAMajor disasterFloodInland Flooding
1955-08-201955-08-20DR-40-PAMajor disasterFloods & RainsInland Flooding

FEMA recorded these with designated area Statewide and no county, so they are listed on every county page in the state and not counted with county rows. Local data needed: whether each one affected this county.

Public Assistance filed under this county for declarations that do not list it: 2 rows, $124,361.71

Sources: 2, 3

FEMA numberDeclaredTitleApplicantPA obligatedfederal share obligated, nominal dollars
DR-4292-PA2016-12-02Severe Storms and FloodingMCNETT (TOWNSHIP OF)$121,579.17
EM-3180-PA2003-03-14SnowMcNett, Township of (Tioga County)$2,782.54

FEMA's Public Assistance summaries file these applicants under this county, but FEMA's declaration rows for these disasters do not designate it (an electric cooperative or district serving several counties, for example). Not in any declaration row above and not counted.

Previous occurrences by hazard, with explicit no-event rows

Sources: 2, 6, 7

HazardStorm Events records, all years on file(years in the Period column)Since plan approvalrecordsIn the 12 months before plan approvalrecordsLast 5 yearsrecordsDeclared incidents, all yearsseparate disastersDeclared since approvalseparate disastersPeriodStatement
Avalanche0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Cold Wave22301996 to 2026-06-30
Drought7001996 to 2026-06-30
Earthquake000Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hail54101955 to 2026-06-30
Heat Wave1101996 to 2026-06-30
Hurricane1051996 to 2026-06-30
Ice Storm11001996 to 2026-06-30
Inland Flooding503111996 to 2026-06-30
Landslide0011996 to 2026-06-30No Storm Events records of this type; 1 federal declared incident (see declarations table)
Lightning1001996 to 2026-06-30
Strong Wind2523711955 to 2026-06-30Includes 12 High Wind and 2 Strong Wind records.
Tornado7011950 to 2026-06-30
Wildfire0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather892121996 to 2026-06-30

Notable Storm Events records

Sources: 1, 6, 7

DateEvent typeMagnitude or extentDamagenominal dollarsDeaths, injuriesdirect onlyLocationFlagsWhy listed
2025-03-16Thunderstorm Wind87 kt (100 mph) estimated gust$100,000 property; $0 crops (2025 dollars)0, 0BALSAMwithin last 5 yearsB1-c worst recorded: Thunderstorm Wind
2024-03-20Winter Weather$15,000 property; $0 crops (zone total, 2024 dollars)0, 0NWS zone PAZ037 (TIOGA), zone-levelwithin last 5 yearsB1-c worst recorded: Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleet
2022-02-03Winter Stormproperty not reported; $0 crops (zone total, 2022 dollars)0, 2NWS zone PAZ037 (TIOGA), zone-levelwithin last 5 yearsdeaths or injuries recorded
2011-05-26Thunderstorm Wind70 kt (81 mph) estimated gust$5,000 property; $0 crops (2011 dollars)0, 9BLOSSBURGdeaths or injuries recorded
2007-02-03Extreme Cold/Wind Chill$0 property; $0 crops (zone total, 2007 dollars)0, 0NWS zone PAZ037 (TIOGA), zone-levelB1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill
2005-08-13Lightningdamage not reported0, 1COVINGTONB1-c worst recorded: Lightning
2003-09-18Tropical Stormdamage not reported0, 0NWS zone PAZ037 (TIOGA), zone-levelB1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression
2002-05-31Hail2.5 indamage not reported0, 0TIOGAB1-c worst recorded: Hail
2002-02-01High Wind63 kt (72 mph) measureddamage not reported0, 0NWS zone PAZ037 (TIOGA), zone-levelB1-c worst recorded: High Wind and Strong Wind
1996-11-08Flash Flood$2,500,000 property; $0 crops (1996 dollars)0, 0WELLSBOROB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
1989-11-20Thunderstorm Windspeed not recordeddamage not recorded (pre-1996 record)0, 2location not recordeddeaths or injuries recorded
1983-05-02TornadoF2, 9.8 mi path length (whole path, pre-1996), 30 yd wide$2,500,000 property; crops not recorded (1983 dollars)0, 0location not recordedB1-c worst recorded: Tornado

The full list is in the Excel file, sheet "B1-d Storm Events history" (495 rows).

Location is the place NOAA recorded, as written in its data; it need not be a jurisdiction in this plan.

Local data needed: state-declared emergencies, from your state emergency management agency (federal data do not include them).

FEMA's declaration data list no tribal or special-area declarations for this state.

Supports FEMA checklist item B1-e: probability of future events

Probability: FEMA annualized frequency and descriptor per hazard

Sources: 5, 6

HazardFEMA annualized frequency (modeled)unit per rowUnitIn plain termsDescriptorDescriptor basisNRI events or days in its record period (hail, wind and tornado are area-weighted, so can be fractional)NRI periodLocationNote
Avalanche0.01events per yearabout 1 in 100 yearsPossibleFEMA annualized frequency (modeled)01994 to 2023 (30 years)see B1-f0.01 is NRI's minimum avalanche frequency for a county in an avalanche susceptibility zone; NRI records no avalanche here, so the descriptor reflects the floor, not local events.
Cold Wave3.74event-days per yearabout 3.74 days per yearLikelyStorm Events event-days in 11 of 30 years, 1996 to 2025 (36.7%)712005-11-12 to 2024-11-12 (19 years)countywide
Drought0event-days per yearnone modeledLikelyStorm Events event-days in 4 of 30 years, 1996 to 2025 (13.3%)02000 to 2025 (25.25 years; D3 and D4 only)countywideNRI models no drought event-days here (2000 to 2025, 25.25 years; D3 and D4 only); Storm Events has a record in 4 of 30 years. The descriptor comes from Storm Events, which counts D2 drought that NRI leaves out.
Earthquake0.000392annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.0392%not shownmodeledsee B1-fNo descriptor (Storm Events does not record earthquakes).
Hail1.47events per yearabout 1.47 per yearHighly likelyFEMA annualized frequency (modeled)56.0 (modeled)1986 to 2023 (38 years)countywide
Heat Wave0.684event-days per yearabout 0.684 days per yearPossibleStorm Events event-days in 1 of 30 years, 1996 to 2025 (3.33%)142005-11-12 to 2024-11-12 (19 years)countywide
Hurricane0.0363events per yearabout 1 in 28 yearsPossibleFEMA annualized frequency (modeled)121851 to 2024 (Atlantic)see B1-fNRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are in B1-d.
Ice Storm0.193event-days per yearabout 0.193 days per yearLikelyStorm Events event-days in 6 of 30 years, 1996 to 2025 (20%)131946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding1.32event-days per yearabout 1.32 days per yearLikelyStorm Events event-days in 15 of 30 years, 1996 to 2025 (50%)371996 to 2023 (28 years)see B1-f
Landslide1.37events per year (modeled)about 1.37 per yearHighly likelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning30.9days per year with a strikeabout 30.9 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind1.81events per yearabout 1.81 per yearHighly likelyFEMA annualized frequency (modeled)691986 to 2023 (38 years)countywide
Tornado0.278events per yearabout 1 in 4 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Wildfire0.000251annual probability at a locationchance a given location in the county burns in a year: 0.0251%Storm Events records in 0 of 30 years, 1996 to 2025 (0%)not shownmodeledsee B1-fNo descriptor: no Storm Events record 1996 to 2025
Winter Weather15.5event-days per yearabout 15.5 days per yearHighly likelyStorm Events event-days in 28 of 30 years, 1996 to 2025 (93.3%)2942005-11-12 to 2024-11-12 (19 years)countywide

FEMA annualized frequency (modeled) is the National Risk Index v1.20 (December 2025) estimate of how often a hazard affects this county in a year; it is not recorded events divided by years, and its unit differs by hazard (events, event-days, or days with a lightning strike per year). For earthquake, wildfire, coastal flooding and tsunami the value is the chance (or number of events) at a location in the county, not across the county, so no "1 in N years" is given and the descriptor comes from Storm Events where it has a record (none for earthquake). The Methods page gives each hazard's method, from FEMA's National Risk Index Technical Documentation v1.20.

Where NRI gives event-days, the descriptor comes from the share of years with a Storm Events record; NRI's source records more events, so the two differ.

Descriptor scale used in this packet (defined per unit)

Sources: 5, 6

UnitDescriptorDefinition
events per yearHighly likely1 or more per year
events per yearLikelyabout once in 1 to 10 years
events per yearPossibleabout once in 10 to 100 years
events per yearUnlikelyless than once in 100 years
annual probabilityLikely10% to under 100% chance in a given year
annual probabilityPossible1% to under 10% chance in a given year
annual probabilityUnlikelyunder 1% chance in a given year
event-days (share of years)Highly likelyevent-days recorded in 90% or more of years
event-days (share of years)Likelyevent-days recorded in 10% to under 90% of years
event-days (share of years)Possibleevent-days recorded in some years but under 10% of years
lightning strike-daysHighly likelycloud-to-ground strikes on 1 or more days per year

Intensity bands: historical frequency (Storm Events)

Source: 6

HazardBandYearsEventscounty-coded recordsYears in periodEvents per yearevents / years
Hail1.00-1.99 in1996 to 202515300.5
Hail2.00 in+1996 to 20254300.133
Thunderstorm Wind (counted as NRI Strong Wind)50-64 kt1996 to 2025153305.1
Thunderstorm Wind (counted as NRI Strong Wind)65 kt+1996 to 202512300.4
Thunderstorm Wind (counted as NRI Strong Wind)unmeasured or below 50 kt1996 to 202522300.733
TornadoEF0-11996 to 20255300.167
TornadoEF2-31996 to 20250300
TornadoEF4-51996 to 20250300
Tornadounrated (EFU)1996 to 20250300

The bands show how often events of each severity were recorded in this county, to profile how severe events have been (FEMA's probability item asks for the range of intensities).

Hail smaller than 1 inch is not counted: on 2010-01-05 the National Weather Service raised its severe-hail threshold from 3/4 inch to 1 inch, so smaller reports became less common after 2009 (NWS Service Change Notice 09-52). NRI hail frequency uses a 0.75 inch threshold.

Optional: future conditions. Not a required item in the 2025 FEMA Local Mitigation Planning Policy Guide; some states ask for it. The federal Climate Mapping for Resilience and Adaptation (CMRA) site gives county exposure to future climate conditions (https://resilience.climate.gov/).

Supports FEMA checklist item B1-f: hazards that vary across jurisdictions

Range of census tract risk within the county

Source: 5

HazardTractsrated of allNRI risk score, 0 to 100Tracts by rating
MinMedianMax
Avalanche7 of 1061.763.063.5Very Low 7, Not Applicable 3
Cold Wave10 of 1024.127.432.1Relatively Low 10
Drought0 of 10No Rating 10
Earthquake10 of 1019.022.335.4Very Low 10
Hail10 of 1032.842.745.3Relatively Low 9, Very Low 1
Heat Wave10 of 103.85.17.1Very Low 10
Hurricane10 of 1068.572.277.4Relatively Low 10
Ice Storm10 of 1033.337.746.0Relatively Low 9, Very Low 1
Inland Flooding10 of 1079.492.298.3Very High 3, Relatively High 7
Landslide10 of 1072.092.797.7Relatively Moderate 1, Relatively Low 8, Very Low 1
Lightning10 of 1071.182.090.8Relatively High 7, Relatively Moderate 3
Strong Wind10 of 1077.282.790.2Relatively High 5, Relatively Moderate 5
Tornado10 of 1035.537.345.4Relatively Low 10
Wildfire10 of 1049.464.971.7Relatively Low 1, Very Low 9
Winter Weather10 of 1085.190.894.7Relatively High 10

Rated tracts only: No Rating (score 0.0), Not Applicable and Insufficient Data tracts are counted but not used for the minimum, median and maximum.

The score ranks a tract against all U.S. tracts (100 = highest). The rating is FEMA's category for the tract's risk value, computed differently, so the two can disagree.

Frequency data for cold wave, hail, heat wave, ice storm, lightning, strong wind and winter weather are county-wide or coarse (49 km grid or NWS zone), the same for every jurisdiction; the tract range mostly reflects where buildings and people are.

Each jurisdiction (starting figures from federal data)

Sources: 1, 3, 4, 6

JurisdictionTypePlan statusRepetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definitionPublic Assistance to this jurisdictionFEMA records matched by applicant name; federal share obligated, nominal dollarsEvent records naming this placeall years; since its plan
Blossburg boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 2$29,986.1012 total; 2 since its plan
Elkland boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0no Public Assistance recorded8 total; 0 since its plan
Knoxville boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 2$47,086.9412 total; 1 since its plan
Lawrenceville boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0no Public Assistance recorded14 total; 0 since its plan
Liberty boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$64,936.6113 total; 0 since its plan
Mansfield boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$36,889.5029 total; 2 since its plan
Roseville boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 1$3,6004 total; 0 since its plan
Tioga boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0no Public Assistance recorded10 total; 0 since its plan
Wellsboro boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$31,185.1536 total; 3 since its plan
Westfield boroughOrganized BoroughApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$247,916.023 total; 1 since its plan
Bloss townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$37,428.930 total; 0 since its plan
Brookfield townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$135,862.850 total; 0 since its plan
Charleston townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$171,688.508 total; 4 since its plan
Chatham townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$94,936.490 total; 0 since its plan
Clymer townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$1,147,418.940 total; 0 since its plan
Covington townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$488,462.7410 total; 1 since its plan
Deerfield townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 4$303,517.220 total; 0 since its plan
Delmar townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$424,014.420 total; 0 since its plan
Duncan townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0no Public Assistance recorded0 total; 0 since its plan
Elk townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 1no Public Assistance recorded0 total; 0 since its plan
Farmington townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$78,487.780 total; 0 since its plan
Gaines townshipTownshipApproved, expires 2027-05-08FMA RL 1, SRL 0; any 3$510,250.260 total; 0 since its plan
Hamilton townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$47,355.140 total; 0 since its plan
Jackson townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$298,611.840 total; 0 since its plan
Lawrence townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$109,527.950 total; 0 since its plan
Liberty townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$592,768.1913 total; 0 since its plan
Middlebury townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 2$248,987.980 total; 0 since its plan
Morris townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$371,6419 total; 1 since its plan
Nelson townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$151,593.483 total; 0 since its plan
Osceola townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 2$42,016.5010 total; 4 since its plan
Putnam townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 1$19,896.970 total; 0 since its plan
Richmond townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 1$278,186.860 total; 0 since its plan
Rutland townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$524,137.950 total; 0 since its plan
Shippen townshipTownshipApproved, expires 2027-05-08FMA RL 1, SRL 1; any 3$39,778.990 total; 0 since its plan
Sullivan townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$316,864.810 total; 0 since its plan
Tioga townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$792,844.1310 total; 0 since its plan
Union townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 1; any 2$181,061.320 total; 0 since its plan
Ward townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0no Public Assistance recorded0 total; 0 since its plan
Westfield townshipTownshipApproved, expires 2027-05-08FMA RL 0, SRL 0; any 0$2,494,359.333 total; 1 since its plan

Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).

School districts and special districts get a plan clock row only.

County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.

Supports FEMA checklist items B2-a and B2-b: vulnerability and potential impacts

Local data needed

The table below gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.

No county-level plan row in FEMA data, so there is no approval date to count from.

  • Critical facilities and lifelines per hazard
  • A problem statement per jurisdiction per hazard
  • Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
  • Future assets

County-level starter: exposure, expected annual loss and damage since the plan

Sources: 1, 2, 3, 5, 6, 7

HazardBuilding exposuremodeled dollarsAgriculture exposuremodeled dollarsPopulation exposedpeopleEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL as % of exposurebuildings; agriculture where notedStorm Events damage since plancounty-coded records, property plus crops, nominal dollarsZone-level damage since planproperty plus crops, reported for the zonePublic Assistance since plannominal dollars; see noteNote
Avalanche$264,482n/a1under $1n/a$4,250under 0.0001%
Cold Wave$9,718,386,666$118,787,14341,034$690$330$126,181under 0.0001%
Droughtn/a$0n/an/a$0n/aagriculture exposure is 0 in NRI
Earthquake$17,096,548,305n/a41,045$63,620n/a$11,6260.000372%
Hail$9,718,386,666$118,787,14341,034$9,336$10,771$18,125under 0.0001%
Heat Wave$9,718,386,666$118,787,14341,034under $1$1,873$33,922under 0.0001%
Hurricane$9,716,154,317$118,722,02641,017$510,873$94,206$15,1500.00526%
Ice Storm$9,711,525,277n/a40,982$24,656n/a$3,7250.000254%
Inland Flooding$9,703,742,297$11,900,7542,810$16,263,998$7,244$49,824n/a (see note)NRI counts the full building value of any census block with some flood loss; this is not the value of buildings in the floodplain. Use local FIRM overlays for B2-a/B2-b.
Landslide$585,849,281n/a2,676$2,425n/a$16,0280.000414%
Lightning$9,718,386,666n/a41,034$2,339n/a$278,179under 0.0001%
Strong Wind$9,718,386,666$118,787,14341,034$51,542$1,187$505,4150.00053%
Tornado$9,718,386,666$118,787,14341,034$147,427$995$147,3220.00152%
Wildfire$604,231,662$14,931,4845,568$5,089$27$1,9050.000842%
Winter Weather$9,718,386,666$118,787,14341,034$10,969$55$138,7790.000113%

Totals since the plan: not available. No county-level plan row in FEMA data, so there is no approval date to count from.

FEMA does not split Public Assistance by hazard. A declaration mapped to several hazards is listed under each of them with its full amount, so the per-hazard column does not add up to the total; the unit total counts each declaration once.

NRI computes earthquake exposure on its own basis, so it exceeds the county building value in B2-a.

Supports FEMA checklist item B2-a: vulnerability (county context)

County context

Source: 5

MeasureValue
Population41,034
Building value (total, not at risk)$9,718,386,666
Agriculture value (total, not at risk)$118,787,143
NRI risk rating (all hazards)Relatively Low
Expected annual loss, buildings and agriculture, all hazards$17,209,651
Expected annual loss, population equivalence, all hazards (NRI values each statistical life at $13.7M; a modeled value of expected deaths and injuries, not property damage)$1,350,432
Social vulnerability ratingRelatively Moderate
Community resilience ratingRelatively High
NRI versionDecember 2025

FEMA's all-hazard expected annual loss adds buildings, agriculture and population equivalence; this table gives the property part and the population-equivalence part as separate rows.

Social vulnerability: higher means people are more likely to be harmed and slower to recover. Community resilience: lower means the community is less able to recover. High social vulnerability and low resilience both raise the NRI risk rating.

Supports FEMA checklist item B2-c: repetitive loss properties

Repetitive loss in this county, both definitions

Sources: 1, 4

DefinitionPropertiesSevere repetitive lossProperties
Repetitive loss, FMA definition (44 CFR 77.2)2Severe repetitive loss, FMA definition (44 CFR 77.2)2
Repetitive loss, NFIP insurance definition23Severe repetitive loss, NFIP insurance definition1

The state NFIP coordinator's list, the source FEMA's Handbook names, often uses the NFIP insurance definition (second row).

Repeat-flood properties: county and state-level rows

Sources: 1, 4

ScopeRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
County total2223124010
of which: Blossburg borough0020201
of which: Knoxville borough0020201
of which: Putnam township0010101
of which: Richmond township0010100
of which: Roseville borough0010101
of which: Gaines township1030300
of which: Elk township0010100
of which: Deerfield township0040404
of which: Middlebury township0020200
of which: Osceola township0020201
of which: Union township0110200
of which: Shippen township1131301
Statewide, no county in FEMA's file0010100

The statewide row counts properties FEMA's file gives with no county in this state; they are listed for reference and are not in this county's counts.

Repeat-flood properties by jurisdiction in the plan (NFIP community)

Sources: 1, 4

JurisdictionNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
Blossburg borough4208170020201
Elkland borough4208180000000
Knoxville borough4208190020201
Lawrenceville borough4208210000000
Liberty borough4208220000000
Mansfield borough4208230000000
Roseville borough4208260010101
Tioga borough4208270000000
Wellsboro borough4208290000000
Westfield borough4220930000000
Bloss township4220940000000
Brookfield township4211710000000
Charleston township4211720000000
Chatham township4211730000000
Clymer township4211740000000
Covington township4211750000000
Deerfield township4211760040404
Delmar township4211770000000
Duncan township4220950000000
Elk township4211540010100
Farmington township4220970000000
Gaines township4210051030300
Hamilton township4211780000000
Jackson township4208200000000
Lawrence township4210060000000
Liberty township4220980000000
Middlebury township4211790020200
Morris township4211550000000
Nelson township4211810000000
Osceola township4211820020201
Putnam township4208240010101
Richmond township4208250010100
Rutland township4220990000000
Shippen township4221001131301
Sullivan township4211830000000
Tioga township4208280000000
Union township4211840110200
Ward township4221010000000
Westfield township4211850000000

Counts by occupancy group for each jurisdiction are in the Excel file, sheet "B2-c Jurisdictions".

Jurisdiction rows are whole NFIP communities and need not add up to the county total: a community that extends into another county is counted in full on each jurisdiction row, while the county table counts only its part in this county.

County repeat-flood properties by occupancy group

Sources: 1, 4

Occupancy groupRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
single-family residential1220121010
2 to 4 unit residential0000000
other residential0000000
non-residential1030300
not reported0000000

FEMA's occupancy groups have no institutional class; institutional properties are counted in non-residential or other residential in the table by occupancy group.

FMA RL and FMA SRL are the Flood Mitigation Assistance definitions (44 CFR 77.2), the ones the FEMA Local Mitigation Planning Policy Guide cites. NFIP repetitive loss (the FEMA insurance definition) is 2 or more claims over $1,000 in 10 years, and a property can leave that group once it is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured. The Methods page gives the OpenFEMA field details.

Counts are aggregates of FEMA's public NFIP Multiple Loss Properties file (FEMA's data date 2026-08-02; file version 2026-08-04). No property is identified. County assignment is FEMA's geocode.

In this county 0 properties are FMA repetitive loss but not NFIP repetitive loss, and 21 properties are NFIP repetitive loss but not FMA repetitive loss.

Exact counts; no count suppression.

Sources

Tables cite these sources by number. The full list, for the plan's bibliography (FEMA review item A4-a):

  1. FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
  2. FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
  3. FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
  4. FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)
  5. FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip (download, 25 MB), https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip (download, 635 MB)
  6. NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
  7. NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-30, https://www.weather.gov/gis/ZoneCounty
  8. U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-30, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_counties_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_cousubs_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_place_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_unsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_elsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_scsd_national.zip, https://www2.census.gov/geo/docs/reference/codes2020/national_place_by_county2020.txt, https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.xlsx (used to match place names and codes; no table prints its values)

What this packet is and what the plan adds

This packet is the federal data for the plan's risk assessment (the summary on page 1 says how it is organized); the plan and FEMA's review decide whether each item is met.

The plan adds what only the community has: local data on assets, critical facilities, development and each jurisdiction's impacts; local hazard history, including state-declared emergencies; the mitigation strategy; and adoption.

How the federal data are built: National Risk Index values are FEMA's model, not counts of events. Storm Events is more complete from 1996; zone-level records are placed by forecast zone, not by location in the county. Public Assistance for a jurisdiction is matched by applicant name. The Methods page gives every rule and the known edge cases.

OpenFEMA disclaimer

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

Reuse, citation and corrections

Reuse and citation: Hazard Plain text and tables are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/); credit Hazard Plain and the release. The underlying federal data are public domain; OpenFEMA data are also subject to the OpenFEMA terms and conditions.

Cite this: Hazard Plain (2026). Tioga County, PA: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 42117). Automated baseline. https://hazardplain.org/pa/42117/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.

Corrections: to report an error, name the packet, the table and what your records show. Contact: contact@hazardplain.org