Alert archive / Wyoming / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Wyoming, 2010
233 severe thunderstorm warnings in 2010. 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 2010. Tap one for its archive.
- Severe Thunderstorm Warnings
- 233
- Busiest month
- June106 severe thunderstorm warnings
- Busiest day
- June 20, 201026 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
114 of 233 severe thunderstorm warnings covering Wyoming in 2010 had a qualifying storm report inside them; 197 of 278 hail, wind and damage reports fell inside a warning, on average 25 minutes after it went out.
Wyoming, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 233 | 114 | 51% | 278 | 71% | 25 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Salt Lake City, UT: severe thunderstorm warnings | 101 | 15 | 85% | 73 | 41% | 23 min |
| NWS Billings, MT: severe thunderstorm warnings | 168 | 68 | 60% | 200 | 67% | 22 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 323 | 259 | 20% | 520 | 90% | 27 min |
| NWS Cheyenne, WY: severe thunderstorm warnings | 180 | 94 | 48% | 354 | 71% | 23 min |
| NWS Riverton, WY: severe thunderstorm warnings | 42 | 8 | 81% | 34 | 32% | 20 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 |
|---|---|---|---|---|
| May 9, 10:54 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 36 min |
| May 9, 11:35 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 50 min |
| May 10, 12:49 AM MDT | Severe Thunderstorm Warning | CYS | Laramie | 41 min |
| May 18, 4:12 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| May 18, 4:31 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 44 min |
| May 18, 4:55 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 50 min |
| May 18, 5:34 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 41 min |
| May 21, 4:42 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 29 min |
| May 21, 5:00 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 60 min |
| May 21, 6:08 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 67 min |
| May 21, 6:40 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 28 min |
| May 21, 8:45 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara, Platte | 45 min |
| May 21, 8:49 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 26 min |
| May 21, 9:36 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 39 min |
| May 21, 9:40 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 28 min |
| May 21, 10:23 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 52 min |
| May 24, 11:38 AM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 67 min |
| May 24, 12:46 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 59 min |
| May 24, 1:04 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 24 min |
| May 26, 3:28 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 62 min |
| May 26, 3:55 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 35 min |
| May 26, 4:14 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 61 min |
| May 26, 4:26 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 20 min |
| May 26, 6:04 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 56 min |
| May 26, 6:57 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 63 min |
| May 26, 8:19 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 56 min |
| May 26, 8:59 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 16 min |
| May 26, 9:49 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 56 min |
| May 26, 10:25 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 35 min |
| Jun 6, 2:10 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 50 min |
| Jun 6, 2:58 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 47 min |
| Jun 6, 3:11 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 49 min |
| Jun 6, 3:28 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 27 min |
| Jun 6, 3:33 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Goshen, Laramie, Platte | 42 min |
| Jun 6, 4:13 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 22 min |
| Jun 6, 4:45 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 45 min |
| Jun 6, 7:20 PM MDT | Severe Thunderstorm Warning | RIW | Lincoln | 25 min |
| Jun 7, 3:28 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 47 min |
| Jun 7, 4:05 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Goshen, Niobrara, Platte | 55 min |
| Jun 7, 4:13 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 62 min |
| Jun 7, 4:57 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 63 min |
| Jun 7, 5:12 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 63 min |
| Jun 7, 5:27 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Niobrara, Platte | 19 min |
| Jun 7, 5:57 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 63 min |
| Jun 7, 6:05 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 40 min |
| Jun 7, 6:22 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 30 min |
| Jun 7, 6:46 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 39 min |
| Jun 7, 6:50 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 33 min |
| Jun 7, 6:56 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 64 min |
| Jun 7, 8:24 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 66 min |
| Jun 9, 7:27 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 63 min |
| Jun 9, 8:00 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 30 min |
| Jun 9, 8:19 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 26 min |
| Jun 9, 8:29 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 46 min |
| Jun 9, 10:09 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 51 min |
| Jun 9, 10:50 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 40 min |
| Jun 9, 11:31 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 59 min |
| Jun 10, 3:18 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 27 min |
| Jun 10, 3:43 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 17 min |
| Jun 10, 4:13 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 41 min |
| Jun 11, 4:43 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 62 min |
| Jun 11, 5:40 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 43 min |
| Jun 16, 3:13 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 31 min |
| Jun 16, 3:37 PM MDT | Severe Thunderstorm Warning | RIW | Park | 23 min |
| Jun 16, 4:02 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 58 min |
| Jun 16, 4:39 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| Jun 19, 5:07 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 54 min |
| Jun 19, 6:25 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 29 min |
| Jun 19, 9:21 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 54 min |
| Jun 20, 12:05 AM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 25 min |
| Jun 20, 1:59 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 35 min |
| Jun 20, 2:32 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 58 min |
| Jun 20, 2:49 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 56 min |
| Jun 20, 2:57 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Park, Washakie | 33 min |
| Jun 20, 3:09 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 26 min |
| Jun 20, 3:20 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 18 min |
| Jun 20, 3:24 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 51 min |
| Jun 20, 3:36 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 54 min |
| Jun 20, 3:40 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 65 min |
| Jun 20, 3:42 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 39 min |
| Jun 20, 3:44 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 45 min |
| Jun 20, 3:48 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 27 min |
| Jun 20, 3:54 PM MDT | Severe Thunderstorm Warning | RIW | Washakie | 51 min |
| Jun 20, 4:02 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 58 min |
| Jun 20, 4:21 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn | 42 min |
| Jun 20, 4:28 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 77 min |
| Jun 20, 4:53 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 46 min |
| Jun 20, 4:55 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 65 min |
| Jun 20, 4:58 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 62 min |
| Jun 20, 5:39 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 51 min |
| Jun 20, 5:45 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 60 min |
| Jun 20, 5:46 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 59 min |
| Jun 20, 5:52 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 68 min |
| Jun 20, 6:27 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 63 min |
| Jun 20, 6:28 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 49 min |
| Jun 20, 6:55 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 65 min |
| Jun 21, 4:09 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 41 min |
| Jun 21, 6:09 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 51 min |
| Jun 21, 7:22 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 53 min |
| Jun 21, 7:27 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 63 min |
| Jun 21, 8:02 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 23 min |
| Jun 21, 9:09 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 66 min |
| Jun 21, 10:07 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 55 min |
| Jun 22, 2:36 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 54 min |
| Jun 22, 2:42 PM MDT | Severe Thunderstorm Warning | RIW | Fremont, Natrona | 63 min |
| Jun 22, 3:30 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| Jun 22, 3:40 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 34 min |
| Jun 22, 3:42 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 48 min |
| Jun 22, 4:03 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 42 min |
| Jun 22, 4:05 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 55 min |
| Jun 22, 4:06 PM MDT | Severe Thunderstorm Warning | RIW | Johnson, Natrona | 39 min |
| Jun 22, 4:12 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| Jun 22, 4:30 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 30 min |
| Jun 22, 4:48 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 57 min |
| Jun 22, 5:00 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 60 min |
| Jun 22, 5:14 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Weston | 76 min |
| Jun 22, 5:25 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 53 min |
| Jun 22, 5:30 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 60 min |
| Jun 22, 5:36 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 54 min |
| Jun 22, 6:00 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 62 min |
| Jun 22, 6:05 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 55 min |
| Jun 22, 6:16 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 59 min |
| Jun 22, 6:31 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 79 min |
| Jun 22, 7:19 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 35 min |
| Jun 25, 10:14 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 26 min |
| Jun 26, 3:33 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 57 min |
| Jun 26, 4:30 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 60 min |
| Jun 26, 5:55 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 48 min |
| Jun 29, 7:13 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn, Park | 47 min |
| Jun 30, 3:12 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn, Park | 48 min |
| Jun 30, 3:51 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn | 44 min |
| Jun 30, 4:02 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 58 min |
| Jun 30, 4:16 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 59 min |
| Jun 30, 4:51 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 54 min |
| Jun 30, 5:01 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 59 min |
| Jul 1, 6:56 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 50 min |
| Jul 2, 2:49 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Goshen, Laramie | 41 min |
| Jul 3, 4:54 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 49 min |
| Jul 3, 5:48 PM MDT | Severe Thunderstorm Warning | RIW | Johnson, Natrona | 37 min |
| Jul 3, 9:10 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 31 min |
| Jul 3, 9:21 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 24 min |
| Jul 3, 9:44 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara, Platte | 12 min |
| Jul 4, 5:55 AM MDT | Severe Thunderstorm Warning | RIW | Natrona | 65 min |
| Jul 4, 12:23 PM MDT | Severe Thunderstorm Warning | RIW | Sweetwater | 67 min |
| Jul 4, 12:37 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 35 min |
| Jul 4, 1:54 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 46 min |
| Jul 4, 2:38 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 27 min |
| Jul 4, 3:35 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 42 min |
| Jul 4, 4:32 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 33 min |
| Jul 4, 5:09 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie, Platte | 66 min |
| Jul 6, 5:09 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 30 min |
| Jul 9, 3:26 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 49 min |
| Jul 9, 4:09 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 51 min |
| Jul 10, 2:48 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 41 min |
| Jul 10, 3:16 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 19 min |
| Jul 11, 1:00 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 53 min |
| Jul 11, 4:00 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 45 min |
| Jul 11, 4:07 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 68 min |
| Jul 11, 6:12 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 42 min |
| Jul 11, 7:03 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 13 min |
| Jul 18, 7:18 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 57 min |
| Jul 18, 8:13 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 62 min |
| Jul 19, 2:24 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 66 min |
| Jul 19, 2:55 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 65 min |
| Jul 19, 3:12 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 63 min |
| Jul 19, 3:25 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 43 min |
| Jul 19, 4:02 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 73 min |
| Jul 20, 8:01 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 44 min |
| Jul 20, 8:39 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 66 min |
| Jul 20, 8:43 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 47 min |
| Jul 20, 9:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 63 min |
| Jul 20, 10:23 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 37 min |
| Jul 21, 2:36 PM MDT | Severe Thunderstorm Warning | RIW | Fremont, Sweetwater | 54 min |
| Jul 21, 2:42 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 63 min |
| Jul 21, 3:15 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 30 min |
| Jul 21, 3:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 63 min |
| Jul 21, 3:46 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 27 min |
| Jul 21, 4:36 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 54 min |
| Jul 21, 4:44 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 49 min |
| Jul 21, 5:47 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 28 min |
| Jul 21, 6:28 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 62 min |
| Jul 22, 4:22 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 12 min |
| Jul 22, 4:27 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 18 min |
| Jul 25, 10:17 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Weston | 58 min |
| Jul 26, 10:43 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 40 min |
| Jul 27, 7:48 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 20 min |
| Jul 28, 4:44 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 42 min |
| Jul 28, 5:24 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 49 min |
| Jul 31, 1:39 PM MDT | Severe Thunderstorm Warning | RIW | Teton | 51 min |
| Jul 31, 2:52 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 23 min |
| Aug 1, 8:21 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 54 min |
| Aug 1, 8:52 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 53 min |
| Aug 1, 9:07 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 53 min |
| Aug 1, 9:58 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 28 min |
| Aug 3, 5:20 AM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 45 min |
| Aug 3, 10:41 AM MDT | Severe Thunderstorm Warning | UNR | Crook | 26 min |
| Aug 3, 11:28 AM MDT | Severe Thunderstorm Warning | UNR | Crook | 62 min |
| Aug 3, 12:02 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 34 min |
| Aug 3, 12:36 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 39 min |
| Aug 3, 1:11 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 30 min |
| Aug 3, 5:10 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 19 min |
| Aug 4, 1:39 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 51 min |
| Aug 4, 1:57 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 33 min |
| Aug 4, 2:21 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Park | 27 min |
| Aug 4, 2:28 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 47 min |
| Aug 4, 3:17 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 28 min |
| Aug 4, 7:13 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 62 min |
| Aug 4, 8:10 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 35 min |
| Aug 4, 8:23 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 67 min |
| Aug 6, 5:02 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 43 min |
| Aug 6, 7:14 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 22 min |
| Aug 7, 3:55 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 52 min |
| Aug 7, 4:38 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 37 min |
| Aug 8, 4:24 PM MDT | Severe Thunderstorm Warning | RIW | Park, Teton | 66 min |
| Aug 12, 3:46 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn | 44 min |
| Aug 12, 4:01 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 44 min |
| Aug 12, 4:35 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 40 min |
| Aug 12, 4:38 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 55 min |
| Aug 12, 5:10 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 65 min |
| Aug 12, 5:37 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 68 min |
| Aug 12, 6:41 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 64 min |
| Aug 16, 4:22 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 53 min |
| Aug 22, 2:52 PM MDT | Severe Thunderstorm Warning | RIW | Lincoln | 38 min |
| Aug 22, 4:36 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 39 min |
| Aug 28, 2:22 PM MDT | Severe Thunderstorm Warning | RIW | Teton | 23 min |
| Aug 28, 4:08 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Washakie | 37 min |
| Aug 30, 11:48 AM MDT | Severe Thunderstorm Warning | RIW | Big Horn, Park | 57 min |
| Aug 30, 12:44 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn | 61 min |
| Aug 30, 12:45 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Washakie | 60 min |
| Aug 30, 1:38 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn, Washakie | 37 min |
| Sep 1, 9:03 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 27 min |
| Sep 9, 2:17 PM MDT | Severe Thunderstorm Warning | RIW | Park | 58 min |
| Sep 9, 2:52 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn | 53 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Crook County40
- Goshen County36
- Campbell County34
- Laramie County30
- Platte County28
- Niobrara County26
- Weston County18
- Sheridan County18
- Albany County17
- Johnson County12
- Uinta County9
- Big Horn County9
- Converse County8
- Park County8
- Natrona County8
- Carbon County6
- Washakie County5
- Hot Springs County4
- Fremont County3
- Teton County3
- Lincoln County2
- Sweetwater County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20092011
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. Warning verification from the Mesonet's Cow. Rebuilt daily.