NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Sundance, 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 Sundance, Wyoming since records began in 1851. Since 1950, 39 tornadoes have touched down within 25 miles, 3 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 39
- EF3 or stronger
- 3
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Sundance
The highest rating among the 39 tornadoes within 25 miles is F3, reached 3 times; the most recent, on June 29, 1993, came within 17 miles. Of the 39, one had a path within 5 miles of the city centre, and 11 have come since 2000. June has had the most tornadoes, 21. The most recent tornado was on August 19, 2024. Sundance has more tornadoes within 25 miles than 85% of the 35 Wyoming cities on this site. Hail has been reported within 10 miles 82 times since 1956, with stones up to 4 inches (softball size). Sundance has more hail reports within 10 miles than 88% of the 35 Wyoming cities.
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Tornadoes within 25 miles of Sundance
By decade
- 2020s4
- 2010s6
- 2000s1
- 1990s9(1 EF3+)
- 1980s5
- 1970s7(1 EF3+)
- 1960s4(1 EF3+)
- 1950s3
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 29, 1993 | F3 | 17 mi | 3 mi | 0 / 0 |
| Jun 25, 1975 | F3 | 8 mi | 11.5 mi | 0 / 0 |
| Jul 12, 1965 | F3 | 11 mi | 20.8 mi | 0 / 0 |
| Jul 6, 2020 | EF2 | 18 mi | 5.05 mi | 0 / 0 |
| Jul 6, 2020 | EF2 | 16 mi | 2.06 mi | 0 / 0 |
| Jun 13, 2014 | EF2 | 24 mi | 16.51 mi | 0 / 1 |
| Jul 13, 2009 | EF2 | 14 mi | 9.4 mi | 0 / 2 |
| May 10, 1985 | F2 | 14 mi | 1 mi | 0 / 0 |
| May 18, 1961 | F2 | 9 mi | 0.1 mi | 0 / 0 |
| Jun 25, 1959 | F2 | 10 mi | 1 mi | 0 / 0 |
| May 28, 1953 | F2 | 14 mi | 38.2 mi | 0 / 0 |
| Aug 19, 2024 | EF1 | 14 mi | 2.51 mi | 0 / 0 |
The strongest 12 of 39, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Sundance
The Storm Prediction Center has 82 hail reports within 10 miles of Sundance since 1956, made on 58 separate days. Of these, 62 were 1 inch across or larger, and 7 reached 2 inches. The largest, 4 inches (softball size), fell on June 24, 1959. The most recent report is from August 26, 2024. July has the most reports, 37.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Sundance
The nearest NOAA station with 1991–2020 climate normals is Sundance, WY, 3 miles northeast of Sundance at 4,695 feet. July is the warmest, with an average high of 82°F and low of 56°F; January is the coolest, at 33°F and 13°F. May is the wettest at 3.5 inches of precipitation on average and December the driest at 0.5 inches; the year adds up to 20.3 inches over 52 days with at least a tenth of an inch. Highs reach 90°F on about 19 days a year, almost all from June to September. Lows fall below freezing on about 179 nights a year. Snowfall averages 81.3 inches a year, most of it in February. That 20.3 inches is more than at 30 of the 32 Wyoming stations used on this site (94%). Moorcroft, 26 miles west, has its own station (Devils Twr #2, WY): 19.0 inches a year, 1.3 less than here, and a July average high of 85°F against 82°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 33 | 13 | 0.8 | 3 | 12.9 |
| Feb | 34 | 14 | 0.9 | 3 | 14.7 |
| Mar | 44 | 22 | 1.0 | 4 | 10.3 |
| Apr | 52 | 29 | 2.5 | 6 | 13.2 |
| May | 63 | 39 | 3.5 | 8 | 1.5 |
| Jun | 73 | 49 | 3.0 | 7 | 0.0 |
| Jul | 82 | 56 | 2.5 | 5 | 0.0 |
| Aug | 81 | 54 | 1.7 | 4 | 0.0 |
| Sep | 71 | 45 | 1.3 | 3 | 0.9 |
| Oct | 56 | 33 | 1.7 | 4 | 5.8 |
| Nov | 42 | 22 | 0.9 | 3 | 9.8 |
| Dec | 33 | 14 | 0.5 | 2 | 12.2 |
| Year | 55 | 32 | 20.3 | 52 | 81.3 |
Averages for 1991–2020 at Sundance, WY (4,695 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 Sundance
Since 1996, the National Weather Service has logged 34 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Sundance: 32 thunderstorm wind reports and 2 flash floods. None is recorded as killing or injuring anyone; the NWS estimated $59,000 in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on June 28, 1996.
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
Crook County, which includes Sundance, has been named in 7 federal disaster or emergency declarations since 1978, 4 of them major disasters (by incident: 2 biological emergencies, 2 fires, 2 severe storms, 1 flood). The latest major disaster declaration was Covid-19 Pandemic, on April 11, 2020. FEMA's National Risk Index gives Crook County a Very Low rating for natural hazard risk overall; by hazard: Relatively Moderate for hail; Relatively Low for strong wind and lightning; Very Low for tornadoes, inland flooding and heat waves. It models the county's expected loss from all 18 hazards it covers at $6.3 million a year, the 18th highest of 23 Wyoming counties; of the hazards above, the largest share, $2.5 million (39%), 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 Sundance
- Moorcroft, WY26 mi
- Spearfish, SD27 mi
- Lead, SD28 mi
- Whitewood, SD39 mi
- Belle Fourche, SD39 mi
- Newcastle, WY44 mi
- Sturgis, SD46 mi
- Piedmont, SD53 mi
- Black Hawk, SD55 mi
- Custer, SD55 mi
- Gillette, WY59 mi
- Rapid City, SD61 mi
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