Fremont County, Idaho
County storm and disaster record · FIPS 16043 · population 13,341 · 1,864 sq mi
NOAA's Storm Events Database holds 711 records for Fremont County, Idaho from 1950 through June 30, 2026, on 548 days; the most frequent are winter storm records (411 records). 555 of them are forecast-zone records, which the National Weather Service files once per zone: a county covered by several zones receives each one, so a single storm can add several records on the same day. The deadliest single record is the April 22, 1986 thunderstorm wind: 3 deaths. FEMA has issued 5 declarations naming the county since 1976, 3 of them for natural hazards; the latest for a natural hazard was “Hurricane Katrina” on September 13, 2005.
The record, 1950 to 2026
Storm records filed for the county each year (2026 to June 30, 2026). Before 1996 NOAA recorded only tornadoes (from 1950), thunderstorm wind and hail (from 1955).
- recorded, no damage figure
- under $100,000
- $100,000 or more
- $1 million or more
- $10 million or more, or a death
- $100 million or more, or 10 deaths
- a year's colour: its recorded damage or deaths
- a year with a death
- 1955: wind and hail recorded from 1955
- 1996: all 48 event types from 1996
- Storm records
- 711on 548 days, 1950 to June 30, 2026
- Deaths recorded
- 198 injuries
- Damage, 2025 dollars
- $6.8Mas filed (scale steps before 1993)
- Tornadoes
- 5strongest F1
- FEMA declarations
- 5latest 2020
Source: NOAA NCEI Storm Events Database, records through June 30, 2026 (file revision 20260918); damage converted to 2025 dollars with the BLS CPI-U. Search the record at NCEI. BLS consumer price index.
What hazards hit Fremont County most?
The most frequent records are winter storm records: 411 since 1996. 43% of its winter storm records since 1996 fell in January and February. The rank column places the county among Idaho's counties by days with a record per 1,000 square miles of land over each hazard's complete period.
| Hazard | Records | Days | First, last | Killed | Injured | Damage | Rank in state |
|---|---|---|---|---|---|---|---|
| Winter storms | 411 | 329 | 1996-2026 | 4 | 5 | $739K | 10 of 44 |
| Severe thunderstorm wind | 83 | 53 | 1965-2026 | 3 | 0 | $160K | 19 of 44 |
| High wind and dust storms | 78 | 59 | 2002-2026 | 0 | 0 | $3.0M | 20 of 44 |
| Hail | 41 | 34 | 1962-2026 | 2 | 1 | $67K | 15 of 44 |
| Extreme cold | 28 | 23 | 2002-2025 | 1 | 0 | – | 8 of 44 |
| Wildfires | 19 | 19 | 2006-2025 | 0 | 0 | $2K | 24 of 44 |
| Floods | 16 | 15 | 1997-2025 | 0 | 0 | $327K | 29 of 44 |
| Landslides and avalanches | 9 | 9 | 1998-2026 | 8 | 1 | $2K | 15 of 44 |
| Heat | 7 | 7 | 2002-2026 | 0 | 0 | – | 8 of 44 |
| Fog, smoke and funnel clouds | 5 | 5 | 1998-2022 | 1 | 0 | $6K | 24 of 44 |
| Tornadoes | 5 | 5 | 1984-2025 | 0 | 0 | $71K | 22 of 44 |
| Lightning | 4 | 4 | 1996-2025 | 0 | 1 | $2K | 10 of 44 |
| Heavy rain | 3 | 2 | 1996-2014 | 0 | 0 | $2.5M | 36 of 44 |
| Drought | 2 | 2 | 2001-2002 | 0 | 0 | – | 11 of 44 |
Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.
How many tornadoes has Fremont County had?
NOAA records 5 tornadoes in Fremont County from 1984 to 2025, the strongest rated F1, with 0 deaths and 0 injuries recorded in the county. That is 22nd of 44 Idaho counties by days with tornadoes per 1,000 square miles since 1950. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.
Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 5 tornadoes whose track touched Fremont County since 1950 (NOAA's county records number 5, the same count); along their whole tracks they killed 0 people.
Map of the strongest tornado tracks in Idaho.
Every tornado record filed for Fremont County (5)
| Date | Place | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2025-04-01 | Heman, Fremont County | EFU 0.1 mi x 10 yd | 0 | 0 | – |
| 2013-09-17 | St Anthony, Fremont County | EF0 0.5 mi x 10 yd | 0 | 0 | – |
| 2004-07-02 | Chester, Fremont County | F0 0.2 mi x 20 yd | 0 | 0 | – |
| 1986-08-09 | Fremont County | F0 0.5 mi x 10 yd | 0 | 0 | – |
| 1984-05-15 | Fremont County | F1 5 mi x 3 yd | 0 | 0 | $25K step |
A damage figure marked "step" is a record from before 1993: NOAA then filed damage by category, and the figure is the category as entered, in the dollars of that year, not an estimate of the loss.
Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.
When was the last damaging storm in Fremont County?
The most recent record with damage, injuries or deaths is the April 16, 2026 winter weather (3 injuries and $10,000 in damage in 2025 dollars).
Multiple car crashes occurred around 7:40 a.m on U.S. Highway 20 between mileposts 378 and 380 at the Osborne Bridge, which blocked all lanes from Bull Moose Lane to Henry’s Fork. Fremont County Chief Deputy reported there was a single-car rollover that triggered a secondary two-car T-bone crash directly behind. Three people suffered injuries and were transported to the hospital. Around 4 inches of snow fell in the Island Park area.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1329913)
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2026-06-10 | High WindBonneville County and 3 more · forecast zone Upper Snake River Plain | 50 kt wind | 0 | 0 | – |
| 2026-06-09 | HailMacks Inn, Fremont County | 1.25 in hail | 0 | 0 | – |
| 2026-05-13 | Thunderstorm WindIsland Park, Fremont County | 52 kt wind | 0 | 0 | – |
| 2026-05-13 | Thunderstorm WindSt Anthony, Fremont County | 52 kt wind | 0 | 0 | – |
| 2026-04-23 | High WindBonneville County and 3 more · forecast zone Upper Snake River Plain | 52 kt wind | 0 | 0 | – |
| 2026-04-23 | High WindFremont County and 2 more · forecast zone Teton Valley | 55 kt wind | 0 | 0 | – |
| 2026-04-16 | Winter WeatherClark County and 2 more · forecast zone Centennial Mountains-Island Park | 0 | 3 | $10K | |
| 2026-04-07 | High WindBonneville County and 3 more · forecast zone Upper Snake River Plain | 50 kt wind | 0 | 0 | – |
| 2026-04-02 | High WindBonneville County and 3 more · forecast zone Upper Snake River Plain | 59 kt wind | 0 | 0 | – |
| 2026-04-01 | Winter StormFremont County and 3 more · forecast zone Yellowstone National Park | 0 | 0 | – | |
| 2026-03-17 | HeatFremont County and 3 more · forecast zone Yellowstone National Park | 0 | 0 | – | |
| 2026-03-14 | High WindClark County and 2 more · forecast zone Centennial Mountains-Island Park | 52 kt wind | 0 | 0 | – |
Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.
The deadliest and costliest records
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 1986-04-22 | Thunderstorm WindFremont County | 3 | 0 | – | |
| 2023-11-05 | HailMacks Inn, Fremont County Just before 3 pm a pickup truck crashed into a semi tractor trailer and both individuals in the pickup truck died due to the accident. One individual in the semi was airlifted to a local hospital with injuries. The accident occurred 1 mile south of Macks Inn on US Highway 20. Small hail accumulating to 3 to 4 inches ... | 0.25 in hail | 2 | 1 | – |
| 1998-01-03 | AvalancheClark County and 3 more · forecast zone Upper Snake Highlands During the first week of January, dangerous avalanche conditions prevailed in the mountainous regions of central and eastern Idaho. On January 3rd one avalanche killed a snowmobiler near Island Park. In the same area and at roughly the same time, a second snow snowmobiler was reported missing and presumed dead due to ... | 2 | 0 | – | |
| 2026-02-22 | AvalancheClark County and 2 more · forecast zone Centennial Mountains-Island Park An avalanche occurred at around 2 pm on February 22nd in Carrot Canyon in the Centennial Mountains. Four snowmobilers were buried with 3 escaping but one fatality did occur. | 1 | 0 | – | |
| 2022-12-17 | Freezing FogBonneville County and 3 more · forecast zone Upper Snake River Plain A fatal accident occurred on December 17th at 715 Pm MST on S 15th St E in Idaho Falls near Sandy Downs. It was suspected weather may have been a factor as low visibility in fog and icy roads may have occurred. A car slid off the road and a second vehicle was attempting to get the vehicle out of the snow. A third ... | 1 | 0 | – | |
| 2021-12-25 | Cold/Wind ChillBonneville County and 3 more · forecast zone Upper Snake River Plain A 30 year old man was found dead in a field near Parker Idaho. The cause was believed to be extended exposure to cold air. At the time of death wind chill temperatures were in the teens. | 1 | 0 | – | |
| 2021-04-06 | Winter WeatherBonneville County and 3 more · forecast zone Upper Snake River Plain Two to 4 inches of snow fell in the Idaho Falls and Rigby area and several slide offs occurred on interstate 15. One of the slide offs resulted in an unfortunate indirect accident. An indirect death occurred on interstate 15 in Idaho Falls when a car slid off the highway into the median and a pedestrian walking across ... | 1 | 0 | $5K | |
| 2019-02-09 | Winter StormClark County and Fremont County · forecast zone Centennial Mountains-Island Park Extremely heavy snow fell in the Island Park area with the COOP observer reporting 15 inches and amounts of up to 18 inches reported by the public. The Crab Creek SNOTEL had 13 inches and White Elephant SNOTEL had 13 inches. The heavy snow and wind may have contributed to a snowmobile accident around 8 pm on the 10th ... | 1 | 0 | – |
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2002-04-23 | High WindClark County and 3 more · forecast zone Upper Snake Highlands | 0 | 0 | $2.5M | |
| 2025-03-21 | Winter WeatherBonneville County and 3 more · forecast zone Upper Snake River Plain | 0 | 0 | $100K | |
| 2026-03-12 | High WindBonneville County and 3 more · forecast zone Upper Snake River Plain | 65 kt wind | 0 | 0 | $50K |
| 2026-03-14 | High WindBonneville County and 3 more · forecast zone Upper Snake River Plain | 61 kt wind | 0 | 0 | $30K |
| 2025-12-17 | High WindBonneville County and 3 more · forecast zone Upper Snake River Plain | 55 kt wind | 0 | 0 | $10K |
| 2026-04-16 | Winter WeatherClark County and 2 more · forecast zone Centennial Mountains-Island Park | 0 | 3 | $10K | |
| 2025-02-07 | Winter StormBonneville County and 3 more · forecast zone Upper Snake River Plain | 0 | 0 | $7K | |
| 2021-04-06 | Winter WeatherBonneville County and 3 more · forecast zone Upper Snake River Plain | 1 | 0 | $5K |
Before 1993 NOAA filed damage by category, not amount, so the list above starts in 1993. The highest category filed here before then (entered as $25K, in the dollars of the day) holds: May 15, 1984 (tornado, Fremont County).
Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.
Is it getting more frequent?
Records per decade for Fremont County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).
| Hazard | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020-26 |
|---|---|---|---|---|---|---|---|---|
| Winter storms | – | – | – | – | 31 | 107 | 104 | 169 |
| Severe thunderstorm wind | 0 | 3 | 6 | 6 | 3 | 5 | 15 | 45 |
| High wind and dust storms | – | – | – | – | 0 | 5 | 11 | 62 z |
| Hail | 0 | 2 | 4 | 3 | 9 | 5 | 10 | 8 |
| Extreme cold | – | – | – | – | 0 | 9 | 8 | 11 |
| Wildfires | – | – | – | – | 0 | 4 | 9 | 6 |
High wind and dust storms in the 2020-26: 62 records against 11 in the decade before, 62 of them forecast-zone records. Cells marked z rose mostly through zone records. The local National Weather Service office files these once per forecast zone, so a change in how it draws its zones or splits a storm into records moves this count as much as the weather does; read it beside the Fremont County days with a record above.
Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).
What time of year?
43% of its winter storm records since 1996 fell in January and February. The two busiest months are in violet.
The values, month by month
Jan 91 · Feb 118 · Mar 70 · Apr 51 · May 36 · Jun 47 · Jul 44 · Aug 45 · Sep 21 · Oct 26 · Nov 43 · Dec 119 (records).
Source: NOAA NCEI Storm Events Database, records by the month they began.
Federal disaster declarations for Fremont County
FEMA's register lists 5 declarations that include Fremont County: 3 major disasters, 2 emergencies and 0 fire management assistance declarations. Most were for biological (2) and hurricane (1).
| Declared | Number | Type | Title |
|---|---|---|---|
| 2020-04-09 | DR-4534 | Biological | Covid-19 Pandemic |
| 2020-03-13 | EM-3467 | Biological | Covid-19 |
| 2005-09-13 | EM-3244 | Hurricane | Hurricane Katrina |
| 1997-06-13 | DR-1177 | Severe Storm | Severe Storms, Snowmelt, Land/Mud Slides, Flooding |
| 1976-06-06 | DR-505 | Flood | Dam Collapse, Flooding |
Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.
How many floods has Fremont County had?
NOAA's Storm Events Database holds 16 flood or flash flood records for Fremont County from 1997 to 2025, on 15 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Fremont County ranks 2477th of 2,942 U.S. counties.
The National Flood Insurance Program has paid $90,000 on 7 claims filed in Fremont County; the most in one year was 4 in 2023. Claims count insured losses only: uninsured flood damage is not in this file.
The values, year by year
1997: 1 · 2017: 1 · 2019: 1 · 2023: 4; the other years: 0.
Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.
FEMA's modeled risk for Fremont County
FEMA's National Risk Index rates Fremont County Very Low overall, with an expected annual loss of $16.1 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.
| Hazard | Risk rating | Expected annual loss | Modeled frequency |
|---|---|---|---|
| Avalanche | Relatively High | $2.4M | once in about 5 years (modeled) |
| Winter Weather | Relatively Moderate | $261K | 29 a year (modeled) |
| Lightning | Relatively Moderate | $616K | 38 a year (modeled) |
| Wildfire | Relatively Low | $1.2M | once in about 432 years (modeled) |
| Earthquake | Relatively Low | $3.0M | once in about 26 years (modeled) |
| Landslide | Relatively Low | $19K | about once a year (modeled) |
| Cold Wave | Relatively Low | $1.4M | 2.3 a year (modeled) |
| Riverine Flooding | Relatively Low | $6.9M | once in about 2 years (modeled) |
Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.
Counties that share a border with Fremont County
Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.
Next
- Tornadoes in IdahoEvery Idaho tornado since 1950 and the counties with the most per square mile
- Winter storms in IdahoThe state's winter storm records, by county, year and month
- The Idaho recordEvery hazard in the state, its deadliest events and its federal declarations
- FEMA's risk rating for each hazard in Fremont CountyThe hazard risk calculator: 18 hazards beside the county's record
- Download Fremont County's FEMA declarations (CSV)5 rows: every declaration that named the county, for your own analysis