Hazard Plain Automated baseline

Jefferson County, PA

Risk-assessment baseline packet

County FIPS:
42065
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 ($11,220,426 a year), Lightning ($716,943) and Cold Wave ($587,431).

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: 34 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
Big Run boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-04-15
Brockway boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Brookville boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-03-05
Corsica boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Falls Creek boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Punxsutawney boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-01-08
Reynoldsville boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-04-15
Summerville boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Sykesville boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-05
Timblin boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Worthville boroughBoroughApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-01-08
Barnett townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-09-21
Beaver townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-01
Bell townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-01-11
Clover townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-06-11
Eldred townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-12
Gaskill townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-04-18
Heath townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Henderson townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-13
Knox townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-14
McCalmont townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Oliver townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-01
Perry townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Pine Creek townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Polk townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-04-09
Porter townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Ringgold townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Rose townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-01
Snyder townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Union townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-03-04
Warsaw townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824this jurisdiction approved 2024-02-05
Washington townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Young townshipTownshipApproved, expires 2029-01-01Jefferson County Hazard Mitigation Plan (FEMA plan 109097)2024-01-022029-01-01824
Clarion-Limestone Area School DistrictSchool/School DistrictNo approved plan on recordnonenonenoneFEMA tracker shows a plan in progress

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 Low$11,176,823$3,264$40,339$11,220,426109
2LightningRelatively HighRelatively Moderate$6,957n/a$709,986$716,9433
3Cold WaveRelatively LowRelatively Low$374$9,124$577,933$587,43117
4HurricaneRelatively LowRelatively Low$372,871$18,444$12,782$404,0970Declared 3 times; no Storm Events record of this type.
5TornadoRelatively LowRelatively Low$266,662$599$118,678$385,94012
6Strong WindRelatively LowRelatively Low$197,722$480$170,767$368,969345Includes 24 High Wind and 11 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition).
7Winter WeatherRelatively ModerateRelatively Moderate$15,079$14$135,147$150,24094
8EarthquakeVery LowVery Low$60,416n/a$20,477$80,893Storm Events does not record earthquakes.
9HailVery LowVery Low$11,986$2,231$28,942$43,16068
10Heat WaveVery LowVery Lowunder $1$316$21,189$21,5050No recorded events in Storm Events since 1996 (data through 2026-06-30).
11Ice StormVery LowVery Low$8,357n/a$9,308$17,66515
12LandslideRelatively LowRelatively Low$1,300n/a$9,647$10,9470No recorded events in Storm Events since 1996 (data through 2026-06-30).
13WildfireVery LowVery Low$3,284$4$797$4,0850No recorded events in Storm Events since 1996 (data through 2026-06-30).
14AvalancheVery LowVery Low$0n/a$14$140No recorded events in Storm Events since 1996 (data through 2026-06-30).
15DroughtNo RatingNo Expected Annual Lossesn/a$0n/a$02

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 9502 (Very Low, 5.9)
Earthquaketract 9506 (Very Low, 35.1); tract 9511 (Very Low, 28.8); tract 9503 (Very Low, 27.1)
Hurricanetract 9506 (Relatively Low, 73.6); tract 9511 (Relatively Low, 69.9); tract 9503 (Relatively Low, 69.2)
Landslidetract 9509 (Relatively Moderate, 96.2); tract 9506 (Relatively Low, 94.8); tract 9510 (Relatively Low, 94.6)
Tornadotract 9506 (Relatively Low, 52.5); tract 9511 (Relatively Low, 48.3); tract 9503 (Relatively Low, 45.0)
Wildfiretract 9511 (Very Low, 65.8); tract 9510 (Very Low, 63.2); tract 9506 (Very Low, 62.9)

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 9502 is Census Tract 9502). 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 chill17 records, 2009 to 2026 (17 zone-level)1 day to 3 days (median 2 days); 17 with a recorded value3 consecutive days, 2025-01-20 to 2025-01-22, zone-levelCountywide (zone-level records).
Frost/Freeze (outside NRI's Cold Wave definition)crop damage0
DroughtU.S. Drought Monitor scale (D0 to D4)2 records, 1999 (2 zone-level)61 days; 1 with a recorded value61 days (2 months), 1999-08-01 to 1999-09-30, a run of 2 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)79 records, 1966 to 20260.75 in to 2 in (median 0.88 in); 79 with a recorded value2 in hail, 1976-07-11Event records naming jurisdictions in the plan: Brookville borough (12 records), Brockway borough (9 records), Punxsutawney borough (4 records), Sykesville borough (4 records), Big Run borough (3 records), Reynoldsville borough (3 records), Corsica borough (2 records), Worthville borough (2 records).
Excessive Heat, Heatheat index (in event narratives)0
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson0Storm 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)15 records, 1997 to 2016 (15 zone-level)Ice Storm, 2005-01-05, $30,000 property; crops not reported (2005 dollars); NWS zone PAZ016Countywide (zone-level records).
Flash Flood, Flood, Lakeshore Flooddamage and flood days (flood depth: FIRM)109 records, 1996 to 2025 (4 zone-level)Flash Flood, 1996-07-19, $100,000,000 property; crops not reported (1996 dollars)Event records naming jurisdictions in the plan: Brookville borough (18 records), Summerville borough (10 records), Punxsutawney borough (7 records), Reynoldsville borough (7 records), Sykesville borough (5 records), Big Run borough (4 records), Brockway borough (3 records), Corsica borough (2 records), Pine Creek township (2 records), Worthville borough (1 record). Zone-level records (4) 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)3 records, 1996 to 1997Lightning, 1996-09-12, $5,000 property; crops not reported (1996 dollars)Event records naming jurisdictions in the plan: Brookville borough (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)35 records, 1997 to 2026 (35 zone-level)40 kt (46 mph) to 65 kt (75 mph) (median 50 kt (58 mph)); 32 with a recorded value65 kt (75 mph) measured gust, High Wind, 2026-03-13; NWS zone PAZ016High Wind, 2008-09-14, $500,000 property; $0 crops (zone total, 2008 dollars)Countywide (zone-level records).
Thunderstorm Windwind speed (kt and mph)385 records, 1955 to 202650 kt (58 mph) to 70 kt (81 mph) (median 50 kt (58 mph)); 284 with a recorded value70 kt (81 mph), measurement type not recorded, Thunderstorm Wind, 1976-07-11Thunderstorm Wind, 2024-08-06, $2,000,000 property; $0 crops (2024 dollars)Event records naming jurisdictions in the plan: Brookville borough (49 records), Punxsutawney borough (27 records), Brockway borough (26 records), Reynoldsville borough (22 records), Big Run borough (18 records), Summerville borough (12 records), Sykesville borough (6 records), Pine Creek township (3 records), Corsica borough (2 records), Porter township (2 records); and 3 more jurisdictions (see the Excel file).
TornadoEnhanced Fujita (Fujita before Feb 2007)17 records, 1968 to 2026F/EF0 to F/EF2 (median F/EF1); 17 with a recorded valueF2 tornado, 1976-07-11, 28.7 mi path length (whole path, pre-1996), 33 yd wide, $250,000 property; crops not recorded (1976 dollars), 1 direct death, 7 direct injuriesTornado, 2021-10-16, $150,000 property; $750,000 crops (2021 dollars)Event records naming jurisdictions in the plan: Brockway borough (1 record), Punxsutawney borough (1 record), Reynoldsville borough (1 record), Ringgold township (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)94 records, 1996 to 2026 (94 zone-level)Winter Storm, 2008-02-01, $25,000 property; $0 crops (2008 dollars); NWS zone PAZ016Countywide (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: 14 declarations covering 10 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 dollarsNotes
2020-03-302020-01-20DR-4506-PAMajor disasterCOVID-19 PandemicNon-natural, not counted$62,331.36
2020-03-132020-01-20EM-3441-PAEmergencyCOVID-19Non-natural, not countedno Public Assistance recordedsame incident as DR-4506
2013-10-012013-06-26DR-4149-PAMajor disasterSevere Storms, Tornadoes, and FloodingInland Flooding; Tornado$512,012.30
2012-10-292012-10-26EM-3356-PAEmergencyHurricane SandyHurricaneno Public Assistance recorded
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$238,441.55
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
1996-07-261996-07-19DR-1130-PAMajor disasterSevere Storms, Flooding, and TornadoesInland Flooding (primary); also designated: Tornadono 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
1981-06-151981-06-15DR-641-PAMajor disasterSevere Storms & FloodingInland Floodingno Public Assistance recorded
1977-07-211977-07-21DR-537-PAMajor disasterSevere Storms & FloodingInland Floodingno Public Assistance recorded
1977-01-291977-01-29EM-3026-PAEmergencySnowstormsWinter Weatherno 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
2003-08-232003-07-21DR-1485-PAMajor disasterSevere Storms, Tornadoes, and FloodingInland Flooding; Tornado
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.

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 Wave17601996 to 2026-06-30
Drought2001996 to 2026-06-30
Earthquake000Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hail79601955 to 2026-06-30
Heat Wave0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Hurricane0031996 to 2026-06-30No Storm Events records of this type; 3 federal declared incidents (see declarations table)
Ice Storm15001996 to 2026-06-30
Inland Flooding109761996 to 2026-06-30
Landslide0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Lightning3001996 to 2026-06-30
Strong Wind4207101955 to 2026-06-30Includes 24 High Wind and 11 Strong Wind records.
Tornado17221950 to 2026-06-30
Wildfire0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather942921996 to 2026-06-30

Notable Storm Events records

Sources: 1, 6, 7

DateEvent typeMagnitude or extentDamagenominal dollarsDeaths, injuriesdirect onlyLocationFlagsWhy listed
2026-03-13High Wind65 kt (75 mph) measured gust$0 property; $0 crops (zone total, 2026 dollars)0, 0NWS zone PAZ016 (JEFFERSON), zone-levelwithin last 5 yearsB1-c worst recorded: High Wind and Strong Wind
2025-01-20Cold/Wind Chill$0 property; $0 crops (zone total, 2025 dollars)0, 0NWS zone PAZ016 (JEFFERSON), zone-levelwithin last 5 yearsB1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill
2021-10-16TornadoEF1, 0.58 mi within this county, 260 yd wide$150,000 property; $750,000 crops (2021 dollars)0, 0SIGELwithin last 5 yearsB1-c most damaging: Tornado
2019-08-17Thunderstorm Wind50 kt (58 mph) estimated gust$2,000 property; $0 crops (2019 dollars)0, 1KAHLETOWNdeaths or injuries recorded
2008-02-01Winter Storm$25,000 property; $0 crops (zone total, 2008 dollars)0, 0NWS zone PAZ016 (JEFFERSON), zone-levelB1-c worst recorded: Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleet
2005-01-05Ice Storm$30,000 property; crops not reported (zone total, 2005 dollars)0, 0NWS zone PAZ016 (JEFFERSON), zone-levelB1-c worst recorded: Ice Storm
1999-08-01Droughtdamage not reported0, 0NWS zone PAZ016 (JEFFERSON), zone-levelB1-c worst recorded: Drought
1996-09-12Lightning$5,000 property; crops not reported (1996 dollars)0, 0SIGELB1-c worst recorded: Lightning
1996-07-19Flash Flood$100,000,000 property; crops not reported (1996 dollars)0, 0PUNXSUTAWNEYB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
1976-07-11Hail2 indamage not recorded (pre-1996 record)0, 0location not recordedB1-c worst recorded: Hail
1976-07-11TornadoF2, 28.7 mi path length (whole path, pre-1996), 33 yd wide$250,000 property; crops not recorded (1976 dollars)1, 7location not recordeddeaths or injuries recorded
1976-07-11Thunderstorm Wind70 kt (81 mph), measurement type not recordeddamage not recorded (pre-1996 record)0, 0location not recordedB1-c worst recorded: Thunderstorm Wind

The full list is in the Excel file, sheet "B1-d Storm Events history" (756 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 Wave3.84event-days per yearabout 3.84 days per yearLikelyStorm Events event-days in 7 of 30 years, 1996 to 2025 (23.3%)732005-11-12 to 2024-11-12 (19 years)countywide
Drought0event-days per yearnone modeledPossibleStorm Events event-days in 1 of 30 years, 1996 to 2025 (3.33%)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 1 of 30 years. The descriptor comes from Storm Events, which counts D2 drought that NRI leaves out.
Earthquake0.000413annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.0413%not shownmodeledsee B1-fNo descriptor (Storm Events does not record earthquakes).
Hail2events per yearabout 2 per yearHighly likelyFEMA annualized frequency (modeled)75.8 (modeled)1986 to 2023 (38 years)countywide
Heat Wave0.475event-days per yearabout 0.475 days per yearStorm Events event-days in 0 of 30 years, 1996 to 2025 (0%)112005-11-12 to 2024-11-12 (19 years)countywideNo Storm Events heat wave record, 1996 to 2025
Hurricane0.0356events 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 Storm0.363event-days per yearabout 0.363 days per yearLikelyStorm Events event-days in 10 of 30 years, 1996 to 2025 (33.3%)251946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding1.96event-days per yearabout 1.96 days per yearLikelyStorm Events event-days in 24 of 30 years, 1996 to 2025 (80%)551996 to 2023 (28 years)see B1-f
Landslide0.713events per year (modeled)about 0.71 per yearLikelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning37.9days per year with a strikeabout 37.9 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind2.26events per yearabout 2.26 per yearHighly likelyFEMA annualized frequency (modeled)861986 to 2023 (38 years)countywide
Tornado0.202events per yearabout 1 in 5 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Wildfire0.0000697annual probability at a locationchance a given location in the county burns in a year: 0.00697%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 Weather16.1event-days per yearabout 16.1 days per yearLikelyStorm Events event-days in 25 of 30 years, 1996 to 2025 (83.3%)3062005-11-12 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 202529300.967
Hail2.00 in+1996 to 20250300
Thunderstorm Wind (counted as NRI Strong Wind)50-64 kt1996 to 2025254308.47
Thunderstorm Wind (counted as NRI Strong Wind)65 kt+1996 to 20255300.167
Thunderstorm Wind (counted as NRI Strong Wind)unmeasured or below 50 kt1996 to 202537301.23
TornadoEF0-11996 to 20259300.3
TornadoEF2-31996 to 20252300.0667
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
Avalanche1 of 135.95.95.9Very Low 1, Not Applicable 12
Cold Wave13 of 1333.350.464.9Relatively Moderate 8, Relatively Low 5
Drought0 of 13No Rating 13
Earthquake13 of 1312.423.535.1Very Low 13
Hail13 of 1328.039.152.4Relatively Low 8, Very Low 5
Heat Wave13 of 132.23.04.2Very Low 13
Hurricane13 of 1355.565.673.6Relatively Low 13
Ice Storm13 of 139.621.538.1Relatively Low 1, Very Low 12
Inland Flooding13 of 1334.782.293.5Relatively High 8, Relatively Moderate 4, Relatively Low 1
Landslide13 of 1359.892.796.2Relatively Moderate 1, Relatively Low 6, Very Low 6
Lightning13 of 1379.695.398.7Very High 6, Relatively High 7
Strong Wind13 of 1349.069.783.7Relatively High 1, Relatively Moderate 11, Relatively Low 1
Tornado13 of 1330.337.952.5Relatively Low 13
Wildfire13 of 1340.356.265.8Very Low 13
Winter Weather13 of 1370.787.194.2Relatively High 12, Relatively Moderate 1

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
Big Run boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 6$1,231.5025 total; 5 since its plan
Brockway boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$3,481.5739 total; 4 since its plan
Brookville boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 2$2,903.2280 total; 8 since its plan
Corsica boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded6 total; 0 since its plan
Falls Creek boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded0 total; 0 since its plan
Punxsutawney boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 1; any 11$111,539.1439 total; 1 since its plan
Reynoldsville boroughBoroughApproved, expires 2029-01-01FMA RL 2, SRL 1; any 15$55,369.1033 total; 1 since its plan
Summerville boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 1$8,262.0222 total; 0 since its plan
Sykesville boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$9,331.2515 total; 1 since its plan
Timblin boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$10,004.841 total; 0 since its plan
Worthville boroughBoroughApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded5 total; 0 since its plan
Barnett townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$8,872.010 total; 0 since its plan
Beaver townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$42,748.310 total; 0 since its plan
Bell townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 1; any 1$57,779.330 total; 0 since its plan
Clover townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded0 total; 0 since its plan
Eldred townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded0 total; 0 since its plan
Gaskill townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$10,454.650 total; 0 since its plan
Heath townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$53,732.230 total; 0 since its plan
Henderson townshipTownshipApproved, expires 2029-01-01FMA RL 1, SRL 0; any 1$17,444.720 total; 0 since its plan
Knox townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$27,091.970 total; 0 since its plan
McCalmont townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$57,030.850 total; 0 since its plan
Oliver townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$47,537.630 total; 0 since its plan
Perry townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 1no Public Assistance recorded0 total; 0 since its plan
Pine Creek townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded5 total; 0 since its plan
Polk townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$27,656.390 total; 0 since its plan
Porter townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded2 total; 1 since its plan
Ringgold townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0no Public Assistance recorded1 total; 0 since its plan
Rose townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$4,788.050 total; 0 since its plan
Snyder townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 1$20,238.560 total; 0 since its plan
Union townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$1,917.390 total; 0 since its plan
Warsaw townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$6,018.531 total; 0 since its plan
Washington townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 0$19,923.030 total; 0 since its plan
Young townshipTownshipApproved, expires 2029-01-01FMA RL 0, SRL 0; any 2$27,755.350 total; 0 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$0n/aunder 1$0n/a$14building exposure is 0 in NRI
Cold Wave$9,085,033,208$28,874,82744,472$374$9,124$577,933under 0.0001%
Droughtn/a$0n/an/a$0n/aagriculture exposure is 0 in NRI
Earthquake$16,038,096,012n/a44,492$60,416n/a$20,4770.000377%
Hail$9,085,033,208$28,874,82744,472$11,986$2,231$28,9420.000132%
Heat Wave$9,085,033,208$28,874,82744,472under $1$316$21,189under 0.0001%
Hurricane$9,085,033,208$28,867,29644,472$372,871$18,444$12,7820.0041%
Ice Storm$9,081,147,702n/a44,460$8,357n/a$9,308under 0.0001%
Inland Flooding$9,075,545,328$410,5981,851$11,176,823$3,264$40,339n/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$602,089,037n/a3,515$1,300n/a$9,6470.000216%
Lightning$9,085,033,208n/a44,472$6,957n/a$709,986under 0.0001%
Strong Wind$9,085,033,208$28,874,82744,472$197,722$480$170,7670.00218%
Tornado$9,085,033,208$28,874,82744,472$266,662$599$118,6780.00294%
Wildfire$1,947,259,690$7,222,80011,068$3,284$4$7970.000169%
Winter Weather$9,085,033,208$28,874,82744,472$15,079$14$135,1470.000166%

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
Population44,472
Building value (total, not at risk)$9,085,033,208
Agriculture value (total, not at risk)$28,874,827
NRI risk rating (all hazards)Relatively Low
Expected annual loss, buildings and agriculture, all hazards$12,156,308
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)$1,856,008
Social vulnerability ratingVery High
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)3Severe repetitive loss, FMA definition (44 CFR 77.2)3
Repetitive loss, NFIP insurance definition40Severe repetitive loss, NFIP insurance definition2

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 total3340241211
of which: Big Run borough0060602
of which: Brookville borough0020201
of which: Punxsutawney borough011001112
of which: Reynoldsville borough211511514
of which: Summerville borough0010101
of which: Henderson township1010100
of which: Snyder township0010100
of which: Young township0020201
of which: Bell township0111100
of which: Perry township0010100
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
Big Run borough4205080060602
Brockway borough4205090000000
Brookville borough4205100020201
Corsica borough4227080000000
Falls Creek borough4205110000000
Punxsutawney borough420512011001112
Reynoldsville borough420513211511514
Summerville borough4205140010101
Sykesville borough4205150000000
Timblin borough4224480000000
Worthville borough4205160000000
Barnett township4224400000000
Beaver township4224410000000
Bell township4222440111100
Clover township4224420000000
Eldred township4224430000000
Gaskill township4217270000000
Heath township4217280000000
Henderson township4217291010100
Knox township4217300000000
McCalmont township4217310000000
Oliver township4217320000000
Perry township4224440010100
Pine Creek township4224450000000
Polk township4217330000000
Porter township4224460000000
Ringgold township4224470000000
Rose township4217340000000
Snyder township4217350010100
Union township4224490000000
Warsaw township4224500000000
Washington township4224510000000
Young township4217370020201

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 residential322822817
2 to 4 unit residential0010101
other residential0010101
non-residential011001112
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 37 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). Jefferson County, PA: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 42065). Automated baseline. https://hazardplain.org/pa/42065/ 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