North Big Horn Basin storm history
Storm events recorded in North Big Horn Basin, Wyoming between 1950 and 2025.
83
Total events
0
Tornadoes
0
Hail
0
Floods
2
Deaths
$20K
Property damage
Most significant events
Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.
High Wind High Wind
A 70 mph gust was recorded at the Greybull airport with a 62 mph wind gust at the Powell airport.
Heat Heat
It was a record warm December at the Greybull airport. The average temperature of 32.8 degrees beat the old record of 29.0 degrees set last year. The period of record dates back to 1998.
Winter Storm Winter Storm
Heavy snow fell in northern portions of Big Horn County, with a maximum amount of 8 inches in Cowley.
High Wind High Wind
A 62 mph wind gust was recorded at the Greybull Airport.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Temperatures well as low as 30 below zero at the South Big Horn County airport near Greybull.
High Wind High Wind
A maximum wind gust of 59 mph was reported a the Greybull airport.
Winter Storm Winter Storm
Heavy snow fell in southern portions of Big Horn County with 6 to 10 inches roughly on a line from Otto to Basin. Amounts were notably lower a short distance north and south of this heavy snow band.
High Wind High Wind
High wind occurred at the Greybull airport, with a maximum gust of 63 mph.
Winter Storm Winter Storm
A CocoRaHS observer reported 6 inches of snow near Shell.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Low temperatures fell below minus 30 in several locations, including minus 34 at the Greybull Airport and minus 34 in downtown Greybull.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Dangerously cold temperatures and wind chills occurred in the Northern Big Horn Basin. The coldest wind chill temperatures recorded were minus 58 at the Powell Airport and minus 55 at the Greybull airport. The towns of Cowley, Basin and Greybull saw low temperatures fall to 35 be…
Heat Heat
At the Greybull Airport (South Big Horn County Airport) there were 7 consecutive days of high temperatures over 90 degrees to start the month. On the 4th and 7th, the all time September high temperature of 103 degrees F was set then tied. The 103 F on September 7th is now the lat…
Winter Storm Winter Storm
A CoCoRahs spotter reported 8 inches of snow in Lovell. The snow was blown around by winds over 50 mph at times and brought very difficult travel conditions.
High Wind High Wind
High Wind High Wind
High Wind High Wind
High wind occurred behind a cold frontal passage. Some maximum wind gusts included 62 mph at the Willow Creek RAWS and 58 mph at the South Big Horn County airport in Greybull.
High Wind High Wind
A wind gust to 63 mph was measured at the North Big Horn County Airport near Cowley.
High Wind High Wind
A maximum wind gust of 62 mph was recorded at Frannie. Winds were sustained at over 40 mph for an hour and a half. A wind gust of 59 mph was recorded at the South Big Horn County airport in Greybull.
Heat Heat
Record high temperatures of 102 and 105 were recorded at South Big Horn County Airport on July 26th and 27th, respectively.
Heat Heat
Record high temperatures of 104 and 107 were recorded at South Big Horn County Airport on July 18th and 19th.
Excessive Heat Excessive Heat
Very hot temperatures occurred in Big Horn County. The high temperature of 108 degrees at the Greybull, Wyoming airport tied the all time record high temperature.
High Wind High Wind
High winds were reported in the Big Horn Basin. The highest wind gust reported was 66 mph at the South Big Horn County airport in Greybull, Wyoming.
High Wind High Wind
A 58 mph wind gust was recorded at the Powell airport.
High Wind High Wind
A maximum wind gust of 61 mph was reported at the Willow Creek RAWS site.
High Wind High Wind
High winds were reported in Big Horn County. The highest gust was 69 mph at the South Big Horn airport near Greybull, Wyoming.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Extreme cold occurred in Big Horn County, Wyoming, especially in northern portions of the County. Cowley, Wyoming had temperatures drop as low as minus 26 and Lovell, Wyoming had a low temperature of minus 23 on the morning of the 13th.
Winter Storm Winter Storm
Up to eight inches of snow fell in the vicinity of Lovell, Wyoming.
High Wind High Wind
Wind gusts of 62 and 61 mph were reported at the Powell and Greybull, Wyoming airports, respectively.
Cold/Wind Chill Cold/Wind Chill
The Greybull, Wyoming airport had a record low temperature of 8 below zero. This broke the all time October record low temperature of 3 degrees.
High Wind High Wind
A 62 mph wind gust was reported at the Greybull, Wyoming airport.
High Wind High Wind
A 60 mph wind gust was recorded at the Big Horn County airport in Greybull, Wyoming.
High Wind High Wind
Strong winds occurred at the Greybull airport, with a maximum wind gust of 66 mph.
Cold/Wind Chill Cold/Wind Chill
Record cold temperatures occurred at the Greybull airport three nights in a row. The coldest temperature occurred on October 30th with a temperature of three degrees occurring. This record low temperature broke set an all time low for the month, which was nine degrees set in 2006…
High Wind High Wind
High winds occurred in portions of Big Horn County. Some of the strongest gusts included 64 mph at the Cowley airport and 61 mph at the Greybull airport.
Wildfire Wildfire
Winter Storm Winter Storm
Trained spotters reported around 8 inches of snow around Lovell. Amounts dropped further south with only around 2.5 inches around Basin.
Winter Storm Winter Storm
Heavy snow in eastern portions of the zone, with anywhere from 5 to 10 inches from Lovell to Greybull. Snow amounts dropped rapidly further west.
High Wind High Wind
The Greybull Airport had a wind gust of 58 mph.
Winter Storm Winter Storm
Heavy snow fell in a narrow band across portions of Big Horn County. Almost 9 inches of snow was measured north of Shell with up to 6 inches around Greybull. North and south of this line snow fall amounts were much less.
Winter Storm Winter Storm
Winter Storm Winter Storm
Heavy snow fell in a narrow band around the Lovell area. A foot of new snow was common with the highest amount of 19.1 inches. Amounts dropped off rapidly further south with less than three inches reported around Greybull.
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
The temperature dropped to minus 30 degrees at Greybull.
Winter Storm Winter Storm
Heavy snow fell in and around Lovell where 8 to 11 inches of snow occurred. Lesser amounts fell further south.
Winter Storm Winter Storm
A trained spotter measured 9 inches of snow at Hyattville. Lesser amounts were reported further north where Greybull had less than 2 inches.
Heavy Snow Heavy Snow
Heavy snow fell across portions of the northern Big Horn Basin. The heaviest snow was around the Lovell and Cowley areas where there were many reports of 7 to 9 inches.
High Wind High Wind
A 58 mph gust was measured at the Cowley airport.
High Wind High Wind
A wind gust of 60 mph was recorded at North Big Horn County Airport in Cowley. The ASOS at the South Big Horn County Airport in Greybull registered a wind gust of 58 mph.
High Wind High Wind
The peak wind at North Big Horn County Airport near Cowley was clocked at 59 mph at 1935MST. The AWOS at Powell Municipal Airport recorded sustained wind over 40 mph for more than an hour during the late evening.
Events by year
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 3 | 0 |
| 2024 | 2 | 0 |
| 2023 | 5 | 0 |
| 2022 | 5 | 0 |
| 2021 | 12 | 0 |
| 2020 | 5 | 0 |
| 2019 | 2 | 0 |
| 2018 | 3 | 0 |
| 2017 | 5 | 0 |
| 2016 | 4 | 0 |
| 2015 | 3 | 0 |
| 2014 | 8 | 0 |
| 2013 | 1 | 0 |
| 2012 | 1 | 0 |
| 2010 | 2 | 0 |
| 2008 | 4 | 0 |
| 2007 | 3 | 0 |
| 2006 | 1 | 0 |
| 2003 | 1 | 0 |
| 1996 | 13 | 0 |