Converse County, Wyoming

What hazards hit Converse County most?

The most frequent records are high wind and dust records: 269 since 1996. The rank column places the county among Wyoming's counties by days with a record per 1,000 square miles of land over each hazard's complete period.

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 Converse County had?

NOAA records 47 tornadoes in Converse County from 1955 to 2025, the strongest rated EF3, with 0 deaths and 5 injuries recorded in the county. That is 10th of 23 Wyoming 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 49 tornadoes whose track touched Converse County since 1950 (NOAA's county records number 47: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 0 people.

Map of the strongest tornado tracks in Wyoming.

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 Converse County?

The most recent record with damage, injuries or deaths is the October 22, 2020 heavy snow (1 death).

Wyoming Highway Patrol investigated a crash between a dump truck and pickup truck along Interstate 25 west five miles west of Douglas around milepost 145. Around 8:05 PM MDT, a 66-year old male was outside of his pickup truck on the shoulder after sliding off the interstate when a dump truck lost control on the ice and snow-covered roadway and slid off the road into the individual and pickup truck, rolling over on its side with the individual pinned between the vehicles. The 66-year old male died as a result of the crash while the dump truck driver suffered no injuries. A public individual reported 6.0 inches of heavy snowfall a mile south of Douglas.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 920239)

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

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: 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 Converse 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).

High wind and dust storms in the 2010s: 118 records against 17 in the decade before, 118 of them forecast-zone records. Winter storms in the 2010s: 155 records against 29 in the decade before, 155 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 Converse 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?

Records by month in Converse County. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for Converse County

FEMA's register lists 5 declarations that include Converse County: 2 major disasters, one emergency and 2 fire management assistance declarations. Most were for biological (2) and fire (2).

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 Converse County had?

NOAA's Storm Events Database holds 5 flood or flash flood records for Converse County from 1998 to 2019, on 5 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Converse County ranks 2245th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $118,000 on 14 claims filed in Converse County; the most in one year was 2 in 1978. Claims count insured losses only: uninsured flood damage is not in this file.

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 Converse County

FEMA's National Risk Index rates Converse County Very Low overall, with an expected annual loss of $9.7 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.

Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.

Counties that share a border with Converse County

1. Albany County 6,260
2. Carbon County 4,852
3. Platte County 1,842
4. Campbell County 1,488
5. Natrona County 1,333
6. Weston County 911
7. Converse County 843
8. Johnson County 750
9. Niobrara County 489

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 WyomingEvery Wyoming tornado since 1950 and the counties with the most per square mile
• High wind and dust storms in WyomingThe state's high wind and dust records, by county, year and month
• The Wyoming recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Converse CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Converse County's FEMA declarations (CSV)5 rows: every declaration that named the county, for your own analysis