Weather alerts in Wyoming, 1999
166 weather alerts in 1999, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 1999. Tap one for its archive.
- Alerts
- 166
- Warnings
- 149
- Watches
- 17
- Advisories
- 0
- Busiest month
- June89 alerts
- Busiest day
- June 27, 199917 alerts
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 28, 6:07 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 33 min |
| Apr 28, 6:41 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 64 min |
| Apr 30, 4:10 PM MDT | Flash Flood Warning | CYS | Laramie | 6 hr |
| May 13, 3:14 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Washakie | 31 min |
| May 13, 3:47 PM MDT | Severe Thunderstorm Warning | RIW | Washakie | 48 min |
| May 15, 1:57 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 48 min |
| May 15, 2:33 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 47 min |
| May 15, 2:44 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 61 min |
| May 15, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | Crook, Niobrara, Weston | 6 hr |
| May 19, 6:02 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 33 min |
| May 19, 6:17 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 48 min |
| May 19, 7:05 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 15 min |
| May 19, 7:22 PM MDT | Tornado Warning | CYS | Converse | 43 min |
| May 21, 2:00 PM MDT | Severe Thunderstorm Watch | SPC | Crook, Goshen, Niobrara, Platte, Weston | 6 hr |
| May 21, 3:34 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 46 min |
| May 21, 3:48 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 47 min |
| May 21, 3:50 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 30 min |
| May 21, 4:19 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 46 min |
| May 21, 4:54 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 46 min |
| May 21, 5:56 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 64 min |
| May 22, 2:00 PM MDT | Tornado Watch | SPC | Laramie | 7 hr |
| May 30, 1:23 PM MDT | Tornado Warning | CYS | Laramie | 32 min |
| May 30, 2:09 PM MDT | Tornado Warning | CYS | Laramie | 31 min |
| May 30, 2:40 PM MDT | Tornado Warning | CYS | Laramie | 35 min |
| May 31, 11:55 AM MDT | Severe Thunderstorm Warning | CYS | Platte | 30 min |
| May 31, 12:10 PM MDT | Tornado Warning | CYS | Platte | 15 min |
| Jun 1, 7:19 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 46 min |
| Jun 1, 8:02 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 48 min |
| Jun 2, 9:03 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 32 min |
| Jun 4, 3:00 PM MDT | Tornado Watch | SPC | Goshen, Platte | 5 hr |
| Jun 4, 4:51 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Platte | 34 min |
| Jun 4, 4:58 PM MDT | Tornado Warning | CYS | Converse, Platte | 32 min |
| Jun 4, 5:15 PM MDT | Tornado Watch | SPC | Campbell, Crook, Goshen, Niobrara, Platte, Weston | 7 hr |
| Jun 5, 2:26 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 49 min |
| Jun 5, 2:41 PM MDT | Tornado Warning | UNR | Crook, Weston | 34 min |
| Jun 5, 3:00 PM MDT | Tornado Watch | SPC | Campbell, Crook, Niobrara, Weston | 6 hr |
| Jun 5, 3:02 PM MDT | Tornado Warning | UNR | Campbell | 48 min |
| Jun 5, 3:14 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 46 min |
| Jun 5, 3:47 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 48 min |
| Jun 5, 3:59 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 46 min |
| Jun 7, 4:02 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 48 min |
| Jun 8, 1:47 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs | 33 min |
| Jun 8, 2:22 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs, Washakie | 48 min |
| Jun 9, 12:37 AM MDT | Severe Thunderstorm Warning | UNR | Weston | 33 min |
| Jun 10, 2:30 PM MDT | Severe Thunderstorm Watch | SPC | Goshen, Laramie, Platte | 6 hr |
| Jun 10, 3:06 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 14 min |
| Jun 10, 3:58 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 32 min |
| Jun 10, 5:13 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 32 min |
| Jun 12, 1:52 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| Jun 12, 2:43 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 47 min |
| Jun 12, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | Albany, Campbell, Converse, Crook, Goshen, Laramie and 3 more | 6 hr |
| Jun 12, 3:08 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 47 min |
| Jun 12, 3:15 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 50 min |
| Jun 12, 3:32 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| Jun 12, 3:47 PM MDT | Tornado Warning | UNR | Campbell | 48 min |
| Jun 12, 3:58 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 62 min |
| Jun 12, 4:06 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 49 min |
| Jun 12, 4:17 PM MDT | Tornado Warning | UNR | Campbell | 48 min |
| Jun 12, 4:33 PM MDT | Tornado Warning | CYS | Converse | 32 min |
| Jun 12, 5:04 PM MDT | Tornado Warning | UNR | Campbell | 31 min |
| Jun 12, 5:05 PM MDT | Tornado Warning | CYS | Converse | 30 min |
| Jun 12, 5:37 PM MDT | Tornado Warning | CYS | Converse | 28 min |
| Jun 12, 6:09 PM MDT | Tornado Warning | CYS | Converse | 31 min |
| Jun 14, 2:26 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 34 min |
| Jun 14, 4:00 PM MDT | Severe Thunderstorm Watch | SPC | Goshen, Laramie, Niobrara, Platte | 5 hr |
| Jun 14, 5:49 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 46 min |
| Jun 16, 5:29 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 46 min |
| Jun 17, 3:03 PM MDT | Severe Thunderstorm Warning | RIW | Park | 32 min |
| Jun 17, 3:10 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 45 min |
| Jun 17, 3:33 PM MDT | Tornado Warning | CYS | Laramie | 32 min |
| Jun 17, 4:06 PM MDT | Tornado Warning | CYS | Laramie | 29 min |
| Jun 17, 5:12 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 33 min |
| Jun 17, 5:41 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 64 min |
| Jun 17, 5:46 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 44 min |
| Jun 17, 6:15 PM MDT | Severe Thunderstorm Warning | RIW | Johnson, Natrona | 45 min |
| Jun 17, 6:18 PM MDT | Tornado Warning | UNR | Campbell | 32 min |
| Jun 17, 6:52 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 58 min |
| Jun 17, 7:23 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 62 min |
| Jun 17, 8:04 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 46 min |
| Jun 17, 8:20 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 45 min |
| Jun 19, 3:15 PM MDT | Tornado Watch | SPC | Albany, Campbell, Converse, Crook, Goshen, Johnson and 5 more | 6 hr |
| Jun 19, 3:30 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 35 min |
| Jun 19, 4:26 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 49 min |
| Jun 19, 5:23 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 47 min |
| Jun 19, 7:19 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn | 46 min |
| Jun 19, 9:01 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 49 min |
| Jun 19, 9:47 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 63 min |
| Jun 20, 5:04 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 46 min |
| Jun 20, 5:43 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 47 min |
| Jun 21, 3:05 PM MDT | Flash Flood Warning | RIW | Fremont | 110 min |
| Jun 26, 3:30 PM MDT | Tornado Watch | SPC | Goshen, Laramie, Platte | 6 hr |
| Jun 26, 4:29 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 31 min |
| Jun 26, 4:54 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 31 min |
| Jun 26, 5:12 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 48 min |
| Jun 26, 5:13 PM MDT | Tornado Warning | CYS | Goshen | 32 min |
| Jun 26, 5:42 PM MDT | Tornado Warning | CYS | Goshen | 43 min |
| Jun 26, 6:48 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 47 min |
| Jun 26, 7:05 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 40 min |
| Jun 26, 7:53 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 47 min |
| Jun 26, 8:31 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 49 min |
| Jun 26, 8:45 PM MDT | Tornado Warning | CYS | Goshen | 35 min |
| Jun 27, 1:41 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 49 min |
| Jun 27, 2:08 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 32 min |
| Jun 27, 2:30 PM MDT | Tornado Watch | SPC | Campbell, Converse, Crook, Goshen, Laramie, Niobrara and 2 more | 6 hr |
| Jun 27, 2:59 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 36 min |
| Jun 27, 3:14 PM MDT | Tornado Warning | CYS | Niobrara | 31 min |
| Jun 27, 3:31 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 29 min |
| Jun 27, 3:37 PM MDT | Tornado Warning | CYS | Platte | 33 min |
| Jun 27, 3:51 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 49 min |
| Jun 27, 4:24 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 31 min |
| Jun 27, 4:34 PM MDT | Tornado Warning | CYS | Goshen | 21 min |
| Jun 27, 4:52 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 33 min |
| Jun 27, 5:32 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 33 min |
| Jun 27, 6:27 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 48 min |
| Jun 27, 7:15 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 50 min |
| Jul 1, 11:47 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 33 min |
| Jul 3, 6:15 PM MDT | Severe Thunderstorm Watch | SPC | Niobrara | 5 hr |
| Jul 7, 4:32 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 33 min |
| Jul 7, 5:18 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 32 min |
| Jul 7, 5:51 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 44 min |
| Jul 11, 2:38 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 47 min |
| Jul 15, 4:25 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 45 min |
| Jul 15, 4:37 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 48 min |
| Jul 15, 5:08 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 47 min |
| Jul 15, 5:32 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 48 min |
| Jul 20, 7:13 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 62 min |
| Jul 20, 8:14 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 61 min |
| Jul 21, 3:56 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 49 min |
| Jul 21, 7:23 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 47 min |
| Jul 28, 7:19 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 41 min |
| Aug 6, 6:15 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 35 min |
| Aug 10, 6:24 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 31 min |
| Aug 10, 6:39 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 46 min |
| Aug 11, 1:46 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 59 min |
| Aug 11, 2:15 PM MDT | Severe Thunderstorm Watch | SPC | Lincoln, Sublette, Sweetwater, Uinta | 5 hr |
| Aug 11, 3:35 PM MDT | Tornado Warning | RIW | Hot Springs | 30 min |
| Aug 11, 4:05 PM MDT | Tornado Warning | RIW | Washakie | 50 min |
| Aug 11, 5:49 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 31 min |
| Aug 11, 7:15 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 50 min |
| Aug 11, 8:05 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 50 min |
| Aug 11, 8:19 PM MDT | Tornado Warning | UNR | Campbell | 36 min |
| Aug 11, 8:32 PM MDT | Tornado Warning | UNR | Crook | 48 min |
| Aug 11, 9:16 PM MDT | Tornado Warning | UNR | Crook | 64 min |
| Aug 13, 9:10 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 60 min |
| Aug 13, 9:50 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 45 min |
| Aug 15, 11:15 AM MDT | Tornado Watch | SPC | Crook, Sheridan | 6 hr |
| Aug 28, 2:21 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs | 49 min |
| Aug 28, 3:13 PM MDT | Severe Thunderstorm Warning | RIW | Hot Springs | 42 min |
| Aug 28, 3:59 PM MDT | Severe Thunderstorm Warning | RIW | Washakie | 31 min |
| Aug 28, 8:40 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 45 min |
| Aug 29, 3:34 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 66 min |
| Sep 1, 2:00 PM MDT | Severe Thunderstorm Watch | SPC | Goshen, Laramie, Platte | 6 hr |
| Sep 1, 2:02 PM MDT | Tornado Warning | CYS | Platte | 33 min |
| Sep 1, 2:20 PM MDT | Tornado Warning | CYS | Goshen | 30 min |
| Sep 1, 2:39 PM MDT | Tornado Warning | CYS | Goshen | 31 min |
| Sep 1, 2:48 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 32 min |
| Sep 1, 2:51 PM MDT | Tornado Warning | CYS | Goshen | 34 min |
| Sep 1, 3:26 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 44 min |
| Sep 2, 3:13 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 47 min |
| Sep 3, 1:38 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 27 min |
| Sep 3, 4:15 PM MDT | Tornado Watch | SPC | Goshen, Laramie | 6 hr |
| Sep 3, 4:51 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 34 min |
| Sep 3, 4:55 PM MDT | Tornado Warning | CYS | Converse | 35 min |
| Sep 3, 5:02 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 33 min |
| Sep 3, 5:29 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 61 min |
| Sep 3, 6:29 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 31 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 113 |
| Tornado Warning | 34 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 9 |
| Flooding | |
| Flash Flood Warning | 2 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Crook County34
- Goshen County28
- Platte County26
- Laramie County24
- Campbell County23
- Weston County23
- Converse County16
- Niobrara County12
- Fremont County7
- Hot Springs County6
- Natrona County6
- Johnson County6
- Sheridan County5
- Washakie County5
- Uinta County3
- Carbon County2
- Albany County2
- Park County1
- Big Horn County1
- Lincoln County1
- Sublette County1
- Sweetwater County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.