Alert archive / Wyoming / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Wyoming, 2021
145 severe thunderstorm warnings in 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 145
- Busiest month
- July55 severe thunderstorm warnings
- Busiest day
- July 14, 202111 severe thunderstorm warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 6:54 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 36 min |
| Apr 26, 7:29 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 27 min |
| May 15, 1:18 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 27 min |
| May 16, 5:26 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 49 min |
| May 20, 3:16 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 30 min |
| May 20, 3:49 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 29 min |
| May 20, 3:57 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 19 min |
| May 20, 7:07 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 38 min |
| May 20, 7:27 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 35 min |
| May 23, 1:35 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 29 min |
| May 23, 1:59 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 19 min |
| May 23, 2:03 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 42 min |
| May 23, 2:38 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 24 min |
| May 26, 3:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 63 min |
| May 26, 4:29 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 46 min |
| May 26, 4:30 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 25 min |
| May 26, 5:30 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 34 min |
| May 28, 9:05 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 40 min |
| May 29, 2:17 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 28 min |
| May 29, 6:46 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 29 min |
| Jun 5, 7:16 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 28 min |
| Jun 5, 7:53 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 22 min |
| Jun 6, 5:21 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| Jun 6, 5:32 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 43 min |
| Jun 6, 6:11 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 34 min |
| Jun 6, 6:37 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 38 min |
| Jun 6, 7:39 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 36 min |
| Jun 7, 6:34 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 24 min |
| Jun 8, 6:45 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| Jun 8, 7:27 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| Jun 8, 7:48 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 57 min |
| Jun 8, 8:35 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 55 min |
| Jun 8, 9:03 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 42 min |
| Jun 8, 9:08 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 52 min |
| Jun 8, 10:26 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 49 min |
| Jun 8, 11:15 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| Jun 10, 7:44 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 61 min |
| Jun 10, 8:43 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 35 min |
| Jun 13, 4:53 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 32 min |
| Jun 13, 4:54 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 66 min |
| Jun 13, 4:58 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 47 min |
| Jun 13, 5:13 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 47 min |
| Jun 13, 5:43 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 41 min |
| Jun 13, 6:00 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 44 min |
| Jun 14, 5:16 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 29 min |
| Jun 14, 5:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 48 min |
| Jun 14, 5:44 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 46 min |
| Jun 14, 6:10 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 36 min |
| Jun 14, 10:23 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 37 min |
| Jun 14, 11:01 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 44 min |
| Jun 14, 11:45 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 32 min |
| Jun 18, 7:35 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 40 min |
| Jun 18, 7:54 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 51 min |
| Jun 18, 8:13 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 47 min |
| Jun 18, 8:29 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 46 min |
| Jun 23, 6:00 PM MDT | Severe Thunderstorm Warning | RIW | Park, Teton | 30 min |
| Jul 2, 4:58 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 62 min |
| Jul 2, 5:42 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 48 min |
| Jul 2, 6:30 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 30 min |
| Jul 2, 7:00 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 60 min |
| Jul 2, 7:47 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 36 min |
| Jul 3, 3:01 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 30 min |
| Jul 4, 3:22 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 38 min |
| Jul 5, 3:21 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 39 min |
| Jul 5, 4:54 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 36 min |
| Jul 5, 5:25 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 35 min |
| Jul 5, 6:12 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 48 min |
| Jul 5, 6:50 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 40 min |
| Jul 6, 9:13 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 30 min |
| Jul 6, 9:22 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 38 min |
| Jul 6, 9:51 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 54 min |
| Jul 7, 3:58 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 47 min |
| Jul 7, 4:39 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 51 min |
| Jul 7, 6:54 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 53 min |
| Jul 9, 2:20 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 40 min |
| Jul 9, 2:51 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| Jul 9, 5:12 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 48 min |
| Jul 9, 5:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 63 min |
| Jul 9, 6:15 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Weston | 60 min |
| Jul 9, 6:18 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 42 min |
| Jul 9, 6:35 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 25 min |
| Jul 9, 6:49 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 41 min |
| Jul 9, 7:19 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 41 min |
| Jul 9, 7:25 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 50 min |
| Jul 9, 7:25 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 35 min |
| Jul 9, 7:57 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 63 min |
| Jul 9, 8:04 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 41 min |
| Jul 9, 10:19 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 41 min |
| Jul 13, 6:30 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 60 min |
| Jul 13, 6:54 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 36 min |
| Jul 13, 7:06 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 24 min |
| Jul 13, 7:25 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 65 min |
| Jul 13, 7:28 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 62 min |
| Jul 13, 8:25 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 50 min |
| Jul 13, 8:29 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 31 min |
| Jul 13, 9:12 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 63 min |
| Jul 13, 9:58 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 62 min |
| Jul 14, 2:46 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 29 min |
| Jul 14, 3:11 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 34 min |
| Jul 14, 6:17 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 43 min |
| Jul 14, 6:34 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 26 min |
| Jul 14, 6:59 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 46 min |
| Jul 14, 8:51 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 24 min |
| Jul 15, 4:22 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 38 min |
| Jul 15, 6:22 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 23 min |
| Jul 20, 3:55 PM MDT | Severe Thunderstorm Warning | RIW | Teton | 20 min |
| Jul 29, 2:27 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 48 min |
| Jul 29, 3:12 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 48 min |
| Jul 29, 3:52 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 38 min |
| Jul 30, 5:23 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 37 min |
| Jul 31, 2:47 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 28 min |
| Aug 4, 8:25 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 50 min |
| Aug 6, 3:08 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 37 min |
| Aug 6, 3:18 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 42 min |
| Aug 6, 3:29 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Goshen, Niobrara, Platte | 61 min |
| Aug 6, 3:40 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 35 min |
| Aug 6, 3:47 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 28 min |
| Aug 6, 4:36 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 33 min |
| Aug 6, 4:53 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 37 min |
| Aug 6, 5:23 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 37 min |
| Aug 13, 7:18 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 23 min |
| Aug 14, 7:01 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 44 min |
| Aug 14, 7:12 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| Aug 14, 7:36 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| Aug 21, 7:08 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 37 min |
| Aug 21, 7:45 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 30 min |
| Aug 21, 9:11 PM MDT | Severe Thunderstorm Warning | RIW | Sublette, Sweetwater | 34 min |
| Aug 26, 3:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 63 min |
| Aug 26, 4:08 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 37 min |
| Aug 26, 4:40 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 23 min |
| Aug 26, 4:44 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 31 min |
| Aug 26, 5:59 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 61 min |
| Sep 2, 1:50 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 40 min |
| Sep 2, 7:49 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 26 min |
| Sep 3, 3:23 PM MDT | Severe Thunderstorm Warning | RIW | Sweetwater | 37 min |
| Sep 3, 4:45 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 31 min |
| Sep 3, 5:31 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 26 min |
| Sep 3, 6:20 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 25 min |
| Sep 10, 1:46 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 44 min |
| Sep 10, 5:28 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 34 min |
| Sep 10, 6:01 PM MDT | Severe Thunderstorm Warning | RIW | Fremont, Hot Springs, Natrona, Washakie | 44 min |
| Sep 11, 6:22 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 38 min |
| Sep 12, 6:21 PM MDT | Severe Thunderstorm Warning | RIW | Lincoln | 24 min |
| Sep 13, 3:59 AM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 46 min |
| Sep 14, 4:33 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 57 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Laramie County32
- Goshen County24
- Weston County22
- Crook County18
- Niobrara County17
- Albany County15
- Campbell County14
- Platte County13
- Carbon County8
- Natrona County8
- Uinta County6
- Fremont County5
- Johnson County4
- Sheridan County3
- Teton County2
- Sweetwater County2
- Park County1
- Converse County1
- Sublette County1
- Hot Springs County1
- Washakie County1
- Lincoln County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.