Hazard Plain Automated baseline

Prentiss County, MS

Risk-assessment baseline packet

County FIPS:
28117
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: Approved, expires 2027-05-04. Plan: MEMA District 2 Regional (FEMA plan 108138), approved 2022-05-05.

Since the plan was approved on 2022-05-05: 3 new hazard declarations (2 incidents) and 111 NOAA Storm Events records; details under "What changed since your last plan".

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Inland Flooding ($3,528,162 a year), Earthquake ($2,576,528) and Cold Wave ($2,326,597).

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

Status:
Approved, expires 2027-05-04
Plan:
MEMA District 2 Regional (FEMA plan 108138)
Approved:
2022-05-05
Days to expiry:
216
Update underway:
none recorded in FEMA's plan tracker

What changed since your last plan (approved 2022-05-05)

New federal declarations:
3 new hazard declarations (2 incidents): DR-4874-MS (Severe Storms, Straight-Line Winds, Tornadoes, and Flooding), EM-3640-MS (Severe Winter Storm), DR-4899-MS (Severe Winter Storm)
Storm Events records since approval:
111 records (data through 2026-06-30)
Repetitive loss now:
FMA RL 0, SRL 0 (44 CFR 77.2); any definition: 0
Repeat-flood change:
this release sets the baseline count.

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

Plan status for every jurisdiction listed in this county

Source: 1

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryNotes
Prentiss County (unincorporated area)UnincorporatedApproved, expires 2027-05-04MEMA District 2 Regional (FEMA plan 108138)2022-05-052027-05-04216this jurisdiction approved 2022-07-07
Baldwyn cityCityApproved, expires 2027-05-04MEMA District 2 Regional (FEMA plan 108138)2022-05-052027-05-04216this jurisdiction approved 2022-07-07
Booneville cityCityApproved, expires 2027-05-04MEMA District 2 Regional (FEMA plan 108138)2022-05-052027-05-04216this jurisdiction approved 2022-07-07
Jumpertown townTownApproved, expires 2027-05-04MEMA District 2 Regional (FEMA plan 108138)2022-05-052027-05-04216this jurisdiction approved 2022-07-07
Marietta townTownApproved, expires 2027-05-04MEMA District 2 Regional (FEMA plan 108138)2022-05-052027-05-04216this jurisdiction approved 2022-07-07

Plan 108138 covers 54 other participants, named in the Excel file.

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

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 LowVery Low$3,515,473$474$12,214$3,528,16228
2EarthquakeRelatively LowRelatively Low$1,532,580n/a$1,043,948$2,576,528Storm Events does not record earthquakes.
3Cold WaveRelatively ModerateRelatively Moderate$3,216$35$2,323,346$2,326,5979Includes 2 Frost/Freeze records (outside NRI's Cold Wave definition; counted in this table and in B1-d, not in the B1-e descriptor).
4TornadoRelatively ModerateRelatively Low$643,795$1,642$1,334,543$1,979,97914
5Heat WaveRelatively LowRelatively Low$53$610$635,252$635,91484
6Strong WindRelatively LowRelatively Low$68,450$453$271,550$340,454102Includes 2 High Wind and 3 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition).
7LightningRelatively ModerateRelatively Low$8,058n/a$224,708$232,7661
8HurricaneVery LowVery Low$83,064$15,914$4,027$103,0051
9HailVery LowVery Low$25,385$938$57,227$83,55060
10DroughtRelatively LowRelatively Lown/a$74,082n/a$74,08220
11Ice StormRelatively LowRelatively Low$31,664n/a$11,611$43,2763
12WildfireVery LowVery Low$17,688$26$6,315$24,0290No recorded events in Storm Events since 1996 (data through 2026-06-30).
13Winter WeatherVery LowVery Low$2,576$7$5,129$7,71228
14LandslideRelatively LowVery Low$4,877n/a$457$5,3340No recorded events in Storm Events since 1996 (data through 2026-06-30).

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 wildfire and landslide 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: avalanche, 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
Earthquaketract 9503.01 (Relatively High, 93.9); tract 9505 (Relatively Moderate, 84.3); tract 9504 (Relatively Moderate, 83.1)
Hurricanetract 9504 (Relatively Low, 60.6); tract 9502.01 (Relatively Low, 58.3); tract 9503.01 (Relatively Low, 57.1)
Landslidetract 9501.02 (Relatively Low, 95.3); tract 9504 (Relatively Low, 95.0); tract 9501.01 (Relatively Low, 92.9)
Tornadotract 9504 (Very High, 94.7); tract 9502.01 (Relatively High, 89.2); tract 9503.01 (Relatively High, 88.1)
Wildfiretract 9504 (Relatively Low, 83.5); tract 9502.01 (Relatively Low, 81.2); tract 9501.02 (Relatively Low, 79.5)

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 9503.01 is Census Tract 9503.01). 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
Cold/Wind Chill, Extreme Cold/Wind Chillwind chill7 records, 2022 to 2026 (7 zone-level)2 days to 4 days (median 2 days); 4 with a recorded value4 consecutive days, 2024-01-14 to 2024-01-17, zone-levelCold/Wind Chill, 2026-01-31, $100,000 property; $0 crops (zone total, 2026 dollars)Countywide (zone-level records).
Frost/Freeze (outside NRI's Cold Wave definition)crop damage2 records, 2007 (2 zone-level)No crop damage reported in 2 records.Countywide (zone-level records).
DroughtU.S. Drought Monitor scale (D0 to D4)20 records, 2007 to 2026 (20 zone-level)50 days to 210 days (median 62.5 days); 6 with a recorded value210 days (about 6.9 months), 2007-04-05 to 2007-10-31, a run of 7 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)70 records, 1958 to 20260.75 in to 2.75 in (median 1 in); 69 with a recorded value2.75 in hail, 1997-10-25Event records naming jurisdictions in the plan: Booneville city (20 records), Marietta town (7 records), Jumpertown town (3 records).
Excessive Heat, Heatheat index (in event narratives)84 records, 2007 to 2026 (84 zone-level)1 day to 21 days (median 2 days); 50 with a recorded valueAugust 2007 (1 monthly summary record), zone-levelCountywide (zone-level records).
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson1 record, 2005 (1 zone-level)Strongest recorded: Tropical Storm record, 2005-08-29 to 2005-08-30, $5,000 property; crops not reported (2005 dollars); NWS zone MSZ009Countywide (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)3 records, 1998 to 2026 (3 zone-level)Ice Storm, 2026-01-24, $750,000 property; $0 crops (2026 dollars); NWS zone MSZ009Countywide (zone-level records).
Flash Flood, Flood, Lakeshore Flooddamage and flood days (flood depth: FIRM)28 records, 1997 to 2026Flash Flood, 2010-05-02, $250,000 property; $0 crops (2010 dollars)Event records naming jurisdictions in the plan: Booneville city (15 records), Marietta town (2 records).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, 2002Lightning, 2002-05-03, $25,000 property; crops not reported (2002 dollars)Event records naming jurisdictions in the plan: Booneville city (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)5 records, 2007 to 2023 (5 zone-level)32 kt (37 mph) to 50 kt (58 mph) (median 40 kt (46 mph)); 5 with a recorded value50 kt (58 mph) estimated gust, High Wind, 2023-03-03; same speed and measurement basis also recorded on 2008-01-29; NWS zone MSZ009Strong Wind, 2019-03-14, $50,000 property; $0 crops (zone total, 2019 dollars)Countywide (zone-level records).
Thunderstorm Windwind speed (kt and mph)116 records, 1967 to 202548 kt (55 mph) to 87 kt (100 mph) (median 50 kt (58 mph)); 84 with a recorded value87 kt (100 mph) estimated gust, Thunderstorm Wind, 2008-03-15Thunderstorm Wind, 2022-11-29, $100,000 property; $0 crops (2022 dollars)Event records naming jurisdictions in the plan: Booneville city (36 records), Jumpertown town (11 records), Marietta town (11 records).
TornadoEnhanced Fujita (Fujita before Feb 2007)30 records, 1953 to 2021F/EF0 to F/EF3 (median F/EF1); 29 with a recorded valueF3 tornado, 2001-02-24, 5 mi within this county, 50 yd wide, $2,000,000 property; crops not reported (2001 dollars), 30 direct injuriesEvent records naming jurisdictions in the plan: Booneville city (3 records), Jumpertown town (1 record), Marietta town (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)28 records, 1996 to 2025 (28 zone-level)Heavy Snow, 2021-02-17, $1,200,000 property; $0 crops (2021 dollars); NWS zone MSZ009Countywide (zone-level records).

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

A monthly summary record covers most or all of a month; it does not count days at wave conditions.

Supports FEMA checklist item B1-d: previous occurrences

Federal declarations for this county: 22 declarations covering 18 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).

Federal disaster declarations for this county

Sources: 1, 2, 3

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsFlagsNotes
2026-02-062026-01-23DR-4899-MSMajor disasterSevere Winter StormWinter Weather$7,742,113.49new since last plan; within last 5 years
2026-01-242026-01-23EM-3640-MSEmergencySevere Winter StormWinter Weatherno Public Assistance recordednew since last plan; within last 5 yearssame incident as DR-4899
2025-05-212025-03-14DR-4874-MSMajor disasterSevere Storms, Straight-Line Winds, Tornadoes, and FloodingInland Flooding; Strong Wind; Tornado$440,166.89new since last plan; within last 5 years
2021-10-222021-08-28DR-4626-MSMajor disasterHurricane IdaHurricaneno Public Assistance recordedin the 12 months before plan approval; within last 5 years
2021-08-282021-08-28EM-3569-MSEmergencyHurricane IdaHurricaneno Public Assistance recordedin the 12 months before plan approvalsame incident as DR-4626
2020-04-052020-01-20DR-4528-MSMajor disasterCOVID-19 PandemicNon-natural, not counted$125,217.46
2020-03-132020-01-20EM-3474-MSEmergencyCOVID-19Non-natural, not countedno Public Assistance recordedsame incident as DR-4528
2020-03-122020-01-10DR-4478-MSMajor disasterSevere Storms, Tornadoes, Straight-Line Winds, and FloodingInland Flooding; Strong Wind; Tornado$305,203.95
2019-12-062019-10-26DR-4470-MSMajor disasterSevere Storm, Straight-Line Winds, and FloodingInland Flooding; Strong Wind$637,591.50
2019-04-232019-02-22DR-4429-MSMajor disasterSevere Storms, Straight-Line Winds, Tornadoes, and FloodingInland Flooding; Strong Wind; Tornado$605,530.61
2016-01-042015-12-23DR-4248-MSMajor disasterSevere Storms, Tornadoes, Straight-Line Winds, and FloodingInland Flooding; Strong Wind; Tornado$78,655.29
2011-04-292011-04-15DR-1972-MSMajor disasterSevere Storms, Tornadoes, Straight-Line Winds, and Associated FloodingInland Flooding; Strong Wind; Tornado$36,659.59
2010-05-142010-05-01DR-1916-MSMajor disasterSevere Storms, Tornadoes, and FloodingInland Flooding; Tornado$262,260.38
2008-08-302008-08-28EM-3291-MSEmergencyHurricane GustavHurricaneno Public Assistance recorded
2005-08-292005-08-29DR-1604-MSMajor disasterHurricane KatrinaHurricane$38,711.48
2001-12-072001-11-24DR-1398-MSMajor disasterSevere Storms, Tornadoes and FloodingInland Flooding; Tornado$119,968.21
2001-02-232001-02-16DR-1360-MSMajor disasterSevere Storms and TornadoesTornado$61,264.27
1999-01-251998-12-23DR-1265-MSMajor disasterSevere Winter Storms, Ice and Freezing RainIce Storm$48,551.41
1994-02-181994-02-09DR-1009-MSMajor disasterSevere Winter Storm, Freeezing Rain and SleetWinter Weatherno Public Assistance recorded
1991-05-171991-04-26DR-906-MSMajor disasterSevere Storms, Tornadoes & FloodingInland Flooding; Tornadono Public Assistance recorded
1990-02-281990-01-24DR-859-MSMajor disasterSevere Storms, Tornadoes & FloodingInland Flooding; Tornadono Public Assistance recorded
1973-03-271973-03-27DR-368-MSMajor disasterHeavy Rains, Tornadoes & FloodingInland Flooding; Tornadono 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
1962-10-101962-10-10DR-135-MSMajor disasterChlorine Barge AccidentNon-natural, not counted
1961-02-271961-02-27DR-108-MSMajor disasterFloodsInland Flooding
1953-12-061953-12-06DR-14-MSMajor disasterTornadoTornado

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 not placed in any Mississippi county: 3 rows, $3,519,904.13; listed on the Mississippi state page.

Source: 3

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
Cold Wave9707001996 to 2026-06-30Includes 2 Frost/Freeze records.
Drought20808001996 to 2026-06-30
Earthquake000000Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hail709211001955 to 2026-06-30
Heat Wave8457257001996 to 2026-06-30
Hurricane1000301996 to 2026-06-30
Ice Storm3101101996 to 2026-06-30
Inland Flooding284141111996 to 2026-06-30
Landslide0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Lightning1000001996 to 2026-06-30
Strong Wind12122324611955 to 2026-06-30Includes 2 High Wind and 3 Strong Wind records.
Tornado300111111950 to 2026-06-30
Wildfire0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather28325211996 to 2026-06-30

Notable Storm Events records

Sources: 1, 6, 7

DateEvent typeMagnitude or extentDamagenominal dollarsDeaths, injuriesdirect onlyLocationFlagsWhy listed
2024-01-14Cold/Wind Chill$0 property; $0 crops (zone total, 2024 dollars)0, 0NWS zone MSZ009 (PRENTISS), zone-levelnew since last plan; within last 5 yearsB1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill
2023-03-03High Wind50 kt (58 mph) estimated gust$5,000 property; $0 crops (zone total, 2023 dollars)0, 0NWS zone MSZ009 (PRENTISS), zone-levelnew since last plan; within last 5 yearsB1-c worst recorded: High Wind and Strong Wind
2010-05-02Flash Flood$250,000 property; $0 crops (2010 dollars)0, 0GEEVILLE to HAZELDELLB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
2008-03-15Thunderstorm Wind87 kt (100 mph) estimated gust$40,000 property; $0 crops (2008 dollars)0, 0JUMPERTOWNB1-c worst recorded: Thunderstorm Wind
2007-08-05Excessive Heat$0 property; $0 crops (zone total, 2007 dollars)0, 0NWS zone MSZ009 (PRENTISS), zone-levelB1-c worst recorded: Excessive Heat, Heat
2007-04-05Drought$0 property; $0 crops (zone total, 2007 dollars)0, 0NWS zone MSZ009 (PRENTISS), zone-levelB1-c worst recorded: Drought
2005-08-29Tropical Storm$5,000 property; crops not reported (zone total, 2005 dollars)0, 0NWS zone MSZ009 (PRENTISS), zone-levelB1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression
2002-05-03Lightning$25,000 property; crops not reported (2002 dollars)0, 0BOONEVILLEB1-c worst recorded: Lightning
2001-02-24TornadoF3, 5 mi within this county, 50 yd wide$2,000,000 property; crops not reported (2001 dollars)0, 30WHEELERdeaths or injuries recorded
1997-10-25Hail2.75 in$100,000 property; crops not reported (1997 dollars)0, 0WHEELERB1-c worst recorded: Hail
1967-12-21TornadoF2, 33 yd wide$25,000 property; crops not recorded (1967 dollars)1, 1location not recordeddeaths or injuries recorded
1953-03-14TornadoF2, 3.3 mi path length (whole path, pre-1996), 33 yd wide$25,000 property; crops not recorded (1953 dollars)1, 0location not recordeddeaths or injuries recorded

The full list is in the Excel file, sheet "B1-d Storm Events history" (395 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).

Tribal and special-area declarations in this state are listed on the state page.

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
Cold Wave1.16event-days per yearabout 1.16 days per yearPossibleStorm Events event-days in 2 of 30 years, 1996 to 2025 (6.67%)222005-11-12 to 2024-11-12 (19 years)countywide
Drought13.3event-days per yearabout 13.3 days per yearLikelyStorm Events event-days in 5 of 30 years, 1996 to 2025 (16.7%)4272000 to 2025 (25.25 years; D3 and D4 only)countywide
Earthquake0.00432annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.432%not shownmodeledsee B1-fNo descriptor (Storm Events does not record earthquakes).
Hail3.46events per yearabout 3.46 per yearHighly likelyFEMA annualized frequency (modeled)131.6 (modeled)1986 to 2023 (38 years)countywide
Heat Wave14.8event-days per yearabout 14.8 days per yearLikelyStorm Events event-days in 12 of 30 years, 1996 to 2025 (40%)2482005-11-12 to 2024-11-12 (19 years)countywide
Hurricane0.0456events per yearabout 1 in 22 yearsPossibleFEMA annualized frequency (modeled)101851 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 Storm0.914event-days per yearabout 0.914 days per yearPossibleStorm Events event-days in 2 of 30 years, 1996 to 2025 (6.67%)621946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding0.893event-days per yearabout 0.893 days per yearLikelyStorm Events event-days in 17 of 30 years, 1996 to 2025 (56.7%)251996 to 2023 (28 years)see B1-f
Landslide0.711events per year (modeled)about 0.71 per yearLikelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning62.3days per year with a strikeabout 62.3 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind2.58events per yearabout 2.58 per yearHighly likelyFEMA annualized frequency (modeled)991986 to 2023 (38 years)countywide
Tornado0.324events per yearabout 1 in 3 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Wildfire0.0011annual probability at a locationchance a given location in the county burns in a year: 0.11%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 Weather4.68event-days per yearabout 4.68 days per yearLikelyStorm Events event-days in 16 of 30 years, 1996 to 2025 (53.3%)892005-11-12 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 202528300.933
Hail2.00 in+1996 to 20253300.1
Thunderstorm Wind (counted as NRI Strong Wind)50-64 kt1996 to 202576302.53
Thunderstorm Wind (counted as NRI Strong Wind)65 kt+1996 to 20256300.2
Thunderstorm Wind (counted as NRI Strong Wind)unmeasured or below 50 kt1996 to 202515300.5
TornadoEF0-11996 to 202512300.4
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
Cold Wave8 of 888.792.496.4Very High 1, Relatively High 7
Drought7 of 873.687.993.3Relatively Moderate 1, Relatively Low 5, Very Low 1, No Rating 1
Earthquake8 of 873.982.993.9Relatively High 1, Relatively Moderate 6, Relatively Low 1
Hail8 of 856.661.569.5Relatively Low 8
Heat Wave8 of 872.079.387.6Relatively High 1, Relatively Moderate 7
Hurricane8 of 851.255.360.6Relatively Low 7, Very Low 1
Ice Storm8 of 846.058.769.1Relatively Moderate 1, Relatively Low 7
Inland Flooding8 of 827.346.075.7Relatively Moderate 4, Relatively Low 4
Landslide8 of 853.787.695.3Relatively Low 5, Very Low 3
Lightning8 of 878.686.093.6Relatively High 8
Strong Wind8 of 873.879.989.0Relatively High 1, Relatively Moderate 7
Tornado8 of 878.685.694.7Very High 1, Relatively High 7
Wildfire8 of 857.878.183.5Relatively Low 5, Very Low 3
Winter Weather8 of 830.835.142.9Relatively Low 8

Drought: Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range mostly reflects where crop and livestock value is.

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, drought, 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 (crop and livestock value where a line above names agriculture).

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
Prentiss County (unincorporated area)UnincorporatedApproved, expires 2027-05-04FMA RL 0, SRL 0; any 0$6,134,344.360 total; 0 since its plan
Baldwyn cityCityApproved, expires 2027-05-04FMA RL 0, SRL 0; any 0no Public Assistance recorded0 total; 0 since its plan
Booneville cityCityApproved, expires 2027-05-04FMA RL 0, SRL 0; any 0$3,443,735.6375 total; 10 since its plan
Jumpertown townTownApproved, expires 2027-05-04FMA RL 0, SRL 0; any 0no Public Assistance recorded15 total; 2 since its plan
Marietta townTownApproved, expires 2027-05-04FMA RL 0, SRL 0; any 0no Public Assistance recorded21 total; 7 since its plan

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

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.

  • 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 2022-05-05county-coded records, property plus crops, nominal dollarsZone-level damage since planproperty plus crops, reported for the zonePublic Assistance since plannominal dollars; see noteNote
Cold Wave$4,954,424,063$27,303,17724,995$3,216$35$2,323,346under 0.0001%$100,000
Droughtn/a$13,291,506n/an/a$74,082n/a0.557% (agriculture)$0NRI has no building exposure for this hazard; agriculture shown
Earthquake$8,559,081,020n/a25,008$1,532,580n/a$1,043,9480.0179%
Hail$4,954,424,063$27,303,17724,995$25,385$938$57,2270.000512%$0
Heat Wave$4,954,424,063$27,303,17724,995$53$610$635,252under 0.0001%$0
Hurricane$4,954,424,063$27,299,58724,995$83,064$15,914$4,0270.00168%
Ice Storm$4,954,424,063n/a24,995$31,664n/a$11,6110.000639%$750,000
Inland Flooding$4,953,013,126$5,293,671268$3,515,473$474$12,214n/a (see note)$100,000$440,166.89NRI 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$125,632,470n/a775$4,877n/a$4570.00388%
Lightning$4,954,424,063n/a24,995$8,058n/a$224,7080.000163%
Strong Wind$4,954,424,063$27,303,17724,995$68,450$453$271,5500.00138%$266,000$5,000$440,166.89Storm Events damage since the plan includes 1 zone-level High Wind record ($5,000): a NOAA non-thunderstorm wind type, outside NRI's Strong Wind definition.
Tornado$4,954,424,063$27,303,17724,995$643,795$1,642$1,334,5430.013%$440,166.89
Wildfire$260,922,149$3,419,6053,829$17,688$26$6,3150.00678%
Winter Weather$4,954,424,063$27,303,17724,995$2,576$7$5,129under 0.0001%$0$7,742,113.49

Totals since 2022-05-05 (Storm Events through 2026-06-30): 34 county-coded records, 34 with a damage value recorded (including $0), $366,000; 77 zone-level records, 77 with a damage value recorded (including $0), $855,000 reported for the zone; Public Assistance: $8,182,280.38 on 3 counted declarations, 2 of them with Public Assistance.

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
Population24,995
Building value (total, not at risk)$4,954,424,063
Agriculture value (total, not at risk)$27,303,177
NRI risk rating (all hazards)Relatively Low
Expected annual loss, buildings and agriculture, all hazards$6,031,062
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)$5,930,327
Social vulnerability ratingVery High
Community resilience ratingRelatively Low
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)0Severe repetitive loss, FMA definition (44 CFR 77.2)0
Repetitive loss, NFIP insurance definition0Severe repetitive loss, NFIP insurance definition0

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 total0000000
Statewide, no county in FEMA's file1141403

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
Prentiss County (unincorporated area)2802790000000
Baldwyn city2801340000000
Baldwyn city2803390000000
Booneville city2801350000000
Jumpertown town2803490000000
Marietta town2803500000000

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: 0 in every occupancy group.

Sources: 1, 4

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 0 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). Prentiss County, MS: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 28117). Automated baseline. https://hazardplain.org/ms/28117/ 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