NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Casper, WY
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Casper, Wyoming since records began in 1851. Since 1950, 26 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 26
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Casper
The highest rating among the 26 tornadoes within 25 miles is F2, reached 4 times; the most recent, on July 21, 1987, came within 20 miles. Of the 26, 4 had paths within 5 miles of the city centre, and 7 have come since 2000. June has had the most tornadoes, 8. The most recent tornado was on August 23, 2019. Casper has more tornadoes within 25 miles than 71% of the 35 Wyoming cities on this site. Hail has been reported within 10 miles 79 times since 1959, with stones up to 2.75 inches (baseball size). Casper has more hail reports within 10 miles than 85% of the 35 Wyoming cities.
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Tornadoes within 25 miles of Casper
By decade
- 2010s5
- 2000s2
- 1990s4
- 1980s8
- 1970s4
- 1960s3
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jul 21, 1987 | F2 | 20 mi | 5 mi | 0 / 0 |
| Jun 18, 1987 | F2 | 11 mi | 7 mi | 0 / 0 |
| Jul 20, 1978 | F2 | 11 mi | 1 mi | 0 / 1 |
| May 29, 1971 | F2 | 11 mi | 0.2 mi | 0 / 3 |
| Jun 12, 1986 | F1 | 18 mi | 1 mi | 0 / 0 |
| Aug 9, 1974 | F1 | 16 mi | 0.1 mi | 0 / 0 |
| Jul 27, 1962 | F1 | 3 mi | 0.5 mi | 0 / 0 |
| Aug 23, 2019 | EF0 | 6 mi | 0.83 mi | 0 / 0 |
| Jul 26, 2018 | EF0 | 5 mi | 0.23 mi | 0 / 0 |
| Jun 12, 2017 | EF0 | 6 mi | 0.07 mi | 0 / 0 |
| May 23, 2014 | EF0 | 8 mi | 2 mi | 0 / 0 |
| Jun 22, 2013 | EF0 | 17 mi | 0.08 mi | 0 / 0 |
The strongest 12 of 26, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Casper
The Storm Prediction Center has 79 hail reports within 10 miles of Casper since 1959, made on 57 separate days. Of these, 48 were 1 inch across or larger, and 7 reached 2 inches. The largest, 2.75 inches (baseball size), fell on June 23, 1974. The most recent report is from July 29, 2025. July has the most reports, 23.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Casper
The nearest NOAA station with 1991–2020 climate normals is Casper Wwtp, WY, 5 miles east of Casper at 5,097 feet. July is the warmest, with an average high of 88°F and low of 56°F; January is the coolest, at 38°F and 17°F. May is the wettest at 2.7 inches of precipitation on average and January the driest at 0.4 inches; the year adds up to 13.6 inches over 38 days with at least a tenth of an inch. Highs reach 90°F on about 36 days a year, almost all from June to September. Lows fall below freezing on about 163 nights a year. That 13.6 inches is more than at 18 of the 32 Wyoming stations used on this site (56%).
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 38 | 17 | 0.4 | 2 |
| Feb | 40 | 18 | 0.6 | 2 |
| Mar | 49 | 25 | 1.0 | 3 |
| Apr | 57 | 31 | 1.5 | 5 |
| May | 67 | 41 | 2.7 | 6 |
| Jun | 79 | 50 | 1.6 | 3 |
| Jul | 88 | 56 | 1.2 | 3 |
| Aug | 87 | 55 | 1.0 | 3 |
| Sep | 76 | 44 | 1.1 | 3 |
| Oct | 61 | 33 | 1.3 | 3 |
| Nov | 48 | 25 | 0.5 | 2 |
| Dec | 38 | 17 | 0.7 | 3 |
| Year | 61 | 34 | 13.6 | 38 |
Averages for 1991–2020 at Casper Wwtp, WY (5,097 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Casper
Since 1996, the National Weather Service has logged 78 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Casper: 63 thunderstorm wind reports, 14 flash floods and 1 flood. They killed 0 people and injured 1, and the NWS estimated $9.3 million in property and crop damage. The strongest thunderstorm gust on record here was 79 mph, on July 7, 2002. July has had the most flash floods, 5 of 14. Of the 24 Wyoming cities on this site with a flash flood on record, 22 have had fewer than Casper.
July 3, 2009: flash flood 1 mile from the centre of Casper — 1 injured, $5.0 million damage.
NWS: “A vicious thunderstorm struck the city of Casper between about 1715 and 1800MST at the start of the July 4th holiday weekend. Nearly one inch of rain fell in 21 minutes at the Natrona County International Airport northwest of the city.”
June 15, 2023: flash flood 9 miles from the centre of Casper — $2.9 million damage.
NWS: “47 inches. Flooding was initially reported in downtown Casper where cars where were reported as floating in flowing water.”
July 25, 2005: flash flood 3 miles from the centre of Casper — $500,000 damage.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Flood insurance policyholders in Casper's 3 ZIP codes have filed 55 claims with the National Flood Insurance Program since 1978, and were paid $247,000 for buildings and contents, in the dollars of each year. Of the 9 Wyoming cities on this site with 10 or more claims, 6 have fewer than Casper.
Natrona County, which includes Casper, has been named in 8 federal disaster or emergency declarations since 1978, 3 of them major disasters (by incident: 4 fires, 2 biological emergencies, 2 floods). The latest major disaster declaration was Flooding, on September 11, 2023. FEMA's National Risk Index gives Natrona County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively Moderate for inland flooding and lightning; Relatively Low for tornadoes and hail; Very Low for strong wind and heat waves. It models the county's expected loss from all 18 hazards it covers at $32.6 million a year, the 3rd highest of 23 Wyoming counties; of the hazards above, the largest share, $18.7 million (57%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. 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).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets 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).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Casper
- Evansville, WY11 mi
- Glenrock, WY24 mi
- Douglas, WY51 mi
- Rawlins, WY76 mi
- Wheatland, WY88 mi
- Saratoga, WY96 mi
- Gillette, WY97 mi
- Riverton, WY100 mi
- Buffalo, WY102 mi
- Worland, WY113 mi
- Laramie, WY114 mi
- Thermopolis, WY114 mi
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