Teton County, Montana
County storm and disaster record · FIPS 30099 · population 6,157 · 2,272 sq mi
NOAA's Storm Events Database holds 1,225 records for Teton County, Montana from 1950 through June 30, 2026, on 776 days; the most frequent are high wind and dust records (682 records). 1,004 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 November 23, 2023 winter weather, filed for the forecast zone Eastern Pondera And Eastern Teton, which covers the county: 1 death and 2 injuries. FEMA has issued 12 declarations naming the county since 1975, 10 of them for natural hazards; the latest for a natural hazard was “Severe Winter Storm and Straight-Line Winds” on April 7, 2026.
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
- 1,225on 776 days, 1950 to June 30, 2026
- Deaths recorded
- 12 injuries
- Damage, 2025 dollars
- $15Mas filed (scale steps before 1993)
- Tornadoes
- 4strongest F2
- FEMA declarations
- 12latest 2026
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 Teton County most?
The most frequent records are high wind and dust records: 682 since 2001. The rank column places the county among Montana'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 |
|---|---|---|---|---|---|---|---|
| High wind and dust storms | 682 | 440 | 2001-2026 | 0 | 0 | $167K | 3 of 56 |
| Winter storms | 281 | 200 | 2000-2026 | 1 | 2 | $3.7M | 21 of 56 |
| Hail | 103 | 68 | 1956-2026 | 0 | 0 | $48K | 30 of 56 |
| Severe thunderstorm wind | 92 | 50 | 1982-2026 | 0 | 0 | $11M | 35 of 56 |
| Extreme cold | 25 | 18 | 2002-2025 | 0 | 0 | – | 28 of 56 |
| Wildfires | 14 | 14 | 2000-2026 | 0 | 0 | – | 5 of 56 |
| Floods | 9 | 9 | 2002-2021 | 0 | 0 | $285K | 44 of 56 |
| Fog, smoke and funnel clouds | 8 | 6 | 2020-2023 | 0 | 0 | – | 21 of 56 |
| Heavy rain | 6 | 5 | 2014-2022 | 0 | 0 | – | 28 of 56 |
| Tornadoes | 4 | 4 | 1963-1986 | 0 | 0 | – | 30 of 56 |
| Landslides and avalanches | 1 | 1 | 2023-2023 | 0 | 0 | $48K | 25 of 56 |
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 Teton County had?
NOAA records 4 tornadoes in Teton County from 1963 to 1986, the strongest rated F2, with 0 deaths and 0 injuries recorded in the county. 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 4 tornadoes whose track touched Teton County since 1950 (NOAA's county records number 4, the same count); along their whole tracks they killed 0 people.
Map of the strongest tornado tracks in Montana.
Every tornado record filed for Teton County (4)
| Date | Place | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 1986-06-29 | Teton County | F0 0.2 mi x 10 yd | 0 | 0 | – |
| 1966-07-02 | Teton County | F2 0.8 mi x 50 yd | 0 | 0 | – |
| 1964-07-02 | Teton County | 0 | 0 | – | |
| 1963-06-05 | Teton County | 0 | 0 | – |
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 Teton County?
The most recent record with damage, injuries or deaths is the November 23, 2023 winter weather (1 death and 2 injuries).
MT Highway Patrol notified the NWS of a fatal vehicle crash on Interstate 15 near Brady. MHP stated the vehicle crash was caused by slick roadways from snow and ice. NWS employee reported encountering freezing drizzle on I-15 when passing through same area, shortly after the incident. 1 Fatality, 2 injuries.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 1143746)
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2026-06-12 | HailFairfield, Teton County | 1.00 in hail | 0 | 0 | – |
| 2026-05-28 | Thunderstorm WindChoteau Airport, Teton County | 51 kt wind | 0 | 0 | – |
| 2026-05-28 | Thunderstorm WindChoteau Airport, Teton County | 51 kt wind | 0 | 0 | – |
| 2026-05-28 | Thunderstorm WindChoteau Airport, Teton County | 51 kt wind | 0 | 0 | – |
| 2026-05-28 | Thunderstorm WindEastham Jct, Teton County | 52 kt wind | 0 | 0 | – |
| 2026-05-14 | High WindPondera County and Teton County · forecast zone Eastern Pondera And Eastern Teton | 57 kt wind | 0 | 0 | – |
| 2026-05-14 | High WindLewis and Clark County and Teton County · forecast zone Southern High Plains | 73 kt wind | 0 | 0 | – |
| 2026-04-07 | High WindLewis and Clark County and Teton County · forecast zone Southern High Plains | 68 kt wind | 0 | 0 | – |
| 2026-04-07 | High WindPondera County and Teton County · forecast zone Eastern Pondera And Eastern Teton | 36 kt wind | 0 | 0 | – |
| 2026-03-25 | High WindPondera County and Teton County · forecast zone Eastern Pondera And Eastern Teton | 52 kt wind | 0 | 0 | – |
| 2026-03-20 | High WindPondera County and Teton County · forecast zone Eastern Pondera And Eastern Teton | 52 kt wind | 0 | 0 | – |
| 2026-03-20 | High WindLewis and Clark County and Teton County · forecast zone Southern High Plains | 74 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 |
|---|---|---|---|---|---|
| 2023-11-23 | Winter WeatherPondera County and Teton County · forecast zone Eastern Pondera And Eastern Teton MT Highway Patrol notified the NWS of a fatal vehicle crash on Interstate 15 near Brady. MHP stated the vehicle crash was caused by slick roadways from snow and ice. NWS employee reported encountering freezing drizzle on I-15 when passing through same area, shortly after the incident. 1 Fatality, 2 injuries. | 1 | 2 | – |
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 1994-06-06 | Thunderstorm WindTeton County | 0 | 0 | $11M | |
| 2022-12-07 | BlizzardLewis and Clark County and Teton County · forecast zone Southern Rocky Mountain Front | 0 | 0 | $1.0M | |
| 2020-01-15 | FloodChoteau, Teton County | 0 | 0 | $285K | |
| 1993-05-16 | Thunderstorm WindFairfield, Teton County | 0 | 0 | $102K | |
| 2000-06-05 | Thunderstorm WindCollins, Teton County | 70 kt wind | 0 | 0 | $2K |
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 Teton 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 |
|---|---|---|---|---|---|---|---|---|
| High wind and dust storms | – | – | – | – | 0 | 129 | 313 | 240 |
| Winter storms | – | – | – | – | 0 | 92 | 95 | 94 |
| Hail | 6 | 7 | 4 | 6 | 24 | 24 | 17 | 15 |
| Severe thunderstorm wind | 0 | 0 | 0 | 5 | 7 | 25 | 18 | 37 |
| Extreme cold | – | – | – | – | 0 | 3 | 4 | 18 |
| Wildfires | – | – | – | – | 0 | 4 | 6 | 4 |
Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).
What time of year?
Records by month in Teton County. The two busiest months are in violet.
The values, month by month
Jan 150 · Feb 137 · Mar 119 · Apr 86 · May 54 · Jun 98 · Jul 76 · Aug 50 · Sep 37 · Oct 99 · Nov 156 · Dec 163 (records).
Source: NOAA NCEI Storm Events Database, records by the month they began.
Federal disaster declarations for Teton County
FEMA's register lists 12 declarations that include Teton County: 8 major disasters, 3 emergencies and one fire management assistance declaration. Most were for severe storm (3) and biological (2).
| Declared | Number | Type | Title |
|---|---|---|---|
| 2026-04-07 | DR-4902 | Straight-Line Winds | Severe Winter Storm and Straight-Line Winds |
| 2024-07-18 | DR-4801 | Severe Storm | Severe Winter Storm and Flooding |
| 2020-03-31 | DR-4508 | Biological | Covid-19 Pandemic |
| 2020-03-13 | EM-3476 | Biological | Covid-19 |
| 2017-09-12 | FM-5212 | Fire | Strawberry Fire |
| 2016-05-24 | DR-4271 | Severe Storm | Severe Winter Storm and Straight-Line Winds |
| 2011-06-17 | DR-1996 | Severe Storm | Severe Storms and Flooding |
| 2005-09-13 | EM-3253 | Hurricane | Hurricane Katrina Evacuation |
| 2000-08-30 | DR-1340 | Fire | Wildfires |
| 1986-03-15 | DR-761 | Flood | Heavy Rains, Landslides & Flooding |
| 1977-08-22 | EM-3050 | Drought | Drought |
| 1975-06-28 | DR-472 | Flood | Rains, Showmelt, Storms & 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 Teton County had?
NOAA's Storm Events Database holds 9 flood or flash flood records for Teton County from 2002 to 2021, on 9 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Teton County ranks 2590th of 2,942 U.S. counties.
The National Flood Insurance Program has paid $31,000 on 5 claims filed in Teton County; the most in one year was 2 in 1991. Claims count insured losses only: uninsured flood damage is not in this file.
The values, year by year
1991: 2 · 2002: 1 · 2011: 1 · 2018: 1; 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 Teton County
FEMA's National Risk Index rates Teton County Very Low overall, with an expected annual loss of $8.2 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 Moderate | $502K | once in about 30 years (modeled) |
| Cold Wave | Relatively Moderate | $2.3M | 8.1 a year (modeled) |
| Winter Weather | Relatively Moderate | $142K | 41 a year (modeled) |
| Wildfire | Relatively Low | $263K | once in about 1,538 years (modeled) |
| Drought | Relatively Low | $59K | 60 modeled event-days a year |
| Earthquake | Very Low | $383K | once in about 274 years (modeled) |
| Landslide | Very Low | $2K | about once a year (modeled) |
| Riverine Flooding | Very Low | $4.3M | once in about 3 years (modeled) |
Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.
Counties that share a border with Teton 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 MontanaEvery Montana tornado since 1950 and the counties with the most per square mile
- High wind and dust storms in MontanaThe state's high wind and dust records, by county, year and month
- The Montana recordEvery hazard in the state, its deadliest events and its federal declarations
- FEMA's risk rating for each hazard in Teton CountyThe hazard risk calculator: 18 hazards beside the county's record
- Download Teton County's FEMA declarations (CSV)12 rows: every declaration that named the county, for your own analysis