NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Greybull, 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 Greybull, Wyoming since records began in 1851. Since 1950, 22 tornadoes have touched down within 25 miles, 1 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 22
- EF3 or stronger
- 1
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
1 deaths in all
What the records show for Greybull
The strongest of the 22 tornadoes within 25 miles was an F3 on August 2, 1985; its path came within 23 miles. The deadliest, an F2 on June 26, 1959, killed 1 person. Of the 22, 4 had paths within 5 miles of the city centre, and 5 have come since 2000. June has had the most tornadoes, 14. The most recent tornado was on August 12, 2010. Greybull has more tornadoes within 25 miles than 65% of the 35 Wyoming cities on this site. Hail has been reported within 10 miles 16 times since 1961, with stones up to 2.5 inches (tennis ball size). Of the 35 Wyoming cities, 49% have more hail reports within 10 miles than Greybull.
Compare Greybull's storm record with another city →
Tornadoes within 25 miles of Greybull
By decade
- 2010s1
- 2000s4
- 1990s6
- 1980s1(1 EF3+)
- 1970s5
- 1960s3
- 1950s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Aug 2, 1985 | F3 | 23 mi | 0.2 mi | 0 / 0 |
| Jun 26, 1959 | F2 | 24 mi | 9.2 mi | 1 / 1 |
| Jul 4, 1978 | F2 | 2 mi | 5 mi | 0 / 1 |
| Jul 24, 1967 | F2 | 11 mi | 0.1 mi | 0 / 0 |
| Jul 9, 1962 | F2 | 13 mi | 0.5 mi | 0 / 0 |
| Jun 12, 1962 | F2 | 18 mi | 0.5 mi | 0 / 0 |
| Jun 3, 1958 | F2 | 13 mi | 0.2 mi | 0 / 0 |
| Jun 1, 2009 | EF1 | 21 mi | 0.36 mi | 0 / 0 |
| Jun 26, 2001 | F1 | 2 mi | 0.7 mi | 0 / 0 |
| Jun 6, 1997 | F1 | 5 mi | 1 mi | 0 / 0 |
| Jul 4, 1976 | F1 | 8 mi | 0.2 mi | 0 / 0 |
| Jul 20, 1974 | F1 | 20 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 22, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Greybull
The Storm Prediction Center has 16 hail reports within 10 miles of Greybull since 1961, made on 13 separate days. Of these, 10 were 1 inch across or larger, and 3 reached 2 inches. The largest, 2.5 inches (tennis ball size), fell on August 7, 2009. The most recent report is from May 25, 2023. June has the most reports, 8.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Greybull
The nearest NOAA station with 1991–2020 climate normals is Greybull, WY, 1 mile southwest of Greybull at 3,787 feet. July is the warmest, with an average high of 91°F and low of 55°F; January is the coolest, at 30°F and 2°F. May is the wettest at 1.4 inches of precipitation on average and March and December the driest at 0.2 inches; the year adds up to 7.3 inches over 22 days with at least a tenth of an inch. Highs reach 90°F on about 49 days a year, almost all from June to September. Lows fall below freezing on about 185 nights a year. Snowfall averages 19.2 inches a year, most of it in February. That 7.3 inches is more than at 2 of the 32 Wyoming stations used on this site (6%). Lovell, 25 miles northwest, has its own station (Lovell, WY): 6.5 inches a year, 0.8 less than here, and a July average high of 87°F against 91°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 30 | 2 | 0.3 | 1 | 3.3 |
| Feb | 37 | 9 | 0.4 | 1 | 6.2 |
| Mar | 52 | 21 | 0.2 | 1 | 1.6 |
| Apr | 61 | 31 | 0.6 | 2 | 0.6 |
| May | 71 | 41 | 1.4 | 4 | 0.2 |
| Jun | 81 | 50 | 1.2 | 3 | 0.0 |
| Jul | 91 | 55 | 0.5 | 2 | 0.0 |
| Aug | 88 | 52 | 0.3 | 1 | 0.0 |
| Sep | 77 | 42 | 1.0 | 2 | 0.2 |
| Oct | 61 | 30 | 0.8 | 2 | 0.7 |
| Nov | 45 | 16 | 0.4 | 2 | 2.2 |
| Dec | 32 | 6 | 0.2 | 1 | 4.2 |
| Year | 60 | 30 | 7.3 | 22 | 19.2 |
Averages for 1991–2020 at Greybull, WY (3,787 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 Greybull
Since 1996, the National Weather Service has logged 53 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Greybull: 48 thunderstorm wind reports, 4 floods and 1 flash flood. None is recorded as killing or injuring anyone; the NWS estimated $875,000 in property and crop damage. The strongest thunderstorm gust on record here was 79 mph, on June 8, 2021.
June 28, 2011: flood 5 miles from the centre of Greybull — $300,000 damage.
NWS: “Shell Creek and its tributaries caused flooding in and around the community of Shell. The flooding was a result of continued snowmelt in the western Bighorn Mountains as the warmest temperatures of the season were attained.”
March 7, 2014: flood 2 miles from the centre of Greybull — $250,000 damage.
NWS: “Flooding of the Spence Oil Field and other areas north of Greybull occurred along the Big Horn River. Three homes outside the Greybull levee system had minor flooding.”
June 24, 2011: flood 5 miles from the centre of Greybull — $200,000 damage.
NWS: “Flooding occurred on Shell, Horse, and Trapper creeks as snowmelt runoff increased. Lowland near the creeks and at least one guest ranch were impacted by the rising waters.”
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
Big Horn County, which includes Greybull, has been named in 4 federal disaster or emergency declarations since 1978, 3 of them major disasters (by incident: 2 biological emergencies, 1 flood, 1 severe storm). The latest major disaster declaration was Covid-19 Pandemic, on April 11, 2020. FEMA's National Risk Index gives Big Horn County a Very Low rating for natural hazard risk overall; by hazard: Relatively Low for inland flooding and lightning; Very Low for tornadoes, hail, strong wind and heat waves. It models the county's expected loss from all 18 hazards it covers at $8.9 million a year, the 14th highest of 23 Wyoming counties; of the hazards above, the largest share, $6.2 million (70%), 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 Greybull
- Lovell, WY25 mi
- Worland, WY35 mi
- Powell, WY46 mi
- Sheridan, WY56 mi
- Thermopolis, WY58 mi
- Cody, WY58 mi
- Buffalo, WY68 mi
- Red Lodge, MT81 mi
- Joliet, MT82 mi
- Crow Agency, MT83 mi
- Laurel, MT88 mi
- Park City, MT90 mi
All Wyoming cities →All hurricanes since 1851 →Compare Greybull with another place →