Alert archive / Wyoming / 2021
Weather alerts in Wyoming, September 2021
160 weather alerts in September 2021, 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 September 2021. Tap one for its archive.
- Alerts
- 160
- Warnings
- 48
- Watches
- 26
- Advisories
- 6
- Busiest day
- September 3, 202126 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Sep 2, 7:42 AM MDT | Dense Fog Advisory | CYS | Albany, Carbon | 2 hr |
| Sep 2, 10:28 AM MDT | Special Weather Statement | RIW | 47 min | |
| Sep 2, 11:19 AM MDT | Special Weather Statement | RIW | Sublette | 41 min |
| Sep 2, 1:34 PM MDT | Special Weather Statement | RIW | Fremont | 26 min |
| Sep 2, 1:50 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 40 min |
| Sep 2, 2:21 PM MDT | Special Weather Statement | RIW | 24 min | |
| Sep 2, 2:33 PM MDT | Special Weather Statement | RIW | Lincoln | 27 min |
| Sep 2, 3:01 PM MDT | Special Weather Statement | RIW | Lincoln | 29 min |
| Sep 2, 3:21 PM MDT | Special Weather Statement | RIW | 24 min | |
| Sep 2, 3:30 PM MDT | Special Weather Statement | RIW | Sublette | 30 min |
| Sep 2, 4:02 PM MDT | Special Weather Statement | RIW | 28 min | |
| Sep 2, 7:49 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 26 min |
| Sep 2, 8:15 PM MDT | Special Weather Statement | SLC | Uinta | 30 min |
| Sep 2, 8:23 PM MDT | Special Weather Statement | RIW | Uinta | 37 min |
| Sep 2, 8:32 PM MDT | Special Weather Statement | RIW | 28 min | |
| Sep 2, 8:47 PM MDT | Special Weather Statement | RIW | 43 min | |
| Sep 2, 9:26 PM MDT | Special Weather Statement | RIW | 34 min | |
| Sep 2, 9:45 PM MDT | Special Weather Statement | RIW | Sublette | 30 min |
| Sep 2, 10:56 PM MDT | Special Weather Statement | RIW | Johnson | 19 min |
| Sep 3, 4:14 AM MDT | Special Weather Statement | CYS | Niobrara | 46 min |
| Sep 3, 1:20 PM MDT | Mesoscale Discussion | SPC | Goshen, Laramie, Niobrara, Platte | 55 min |
| Sep 3, 1:38 PM MDT | Special Weather Statement | CYS | Laramie | 37 min |
| Sep 3, 2:20 PM MDT | Special Weather Statement | CYS | Laramie | 25 min |
| Sep 3, 2:47 PM MDT | Special Weather Statement | CYS | Laramie | 43 min |
| Sep 3, 2:59 PM MDT | Mesoscale Discussion | SPC | Campbell, Crook, Weston | 91 min |
| Sep 3, 3:23 PM MDT | Severe Thunderstorm Warning | RIW | Sweetwater | 37 min |
| Sep 3, 3:23 PM MDT | Special Weather Statement | UNR | Crook | 37 min |
| Sep 3, 3:45 PM MDT | Special Weather Statement | CYS | Laramie | 30 min |
| Sep 3, 3:50 PM MDT | Special Weather Statement | RIW | Sweetwater | 25 min |
| Sep 3, 3:53 PM MDT | Special Weather Statement | CYS | Laramie | 37 min |
| Sep 3, 4:11 PM MDT | Special Weather Statement | RIW | Sweetwater | 34 min |
| Sep 3, 4:33 PM MDT | Special Weather Statement | CYS | Laramie | 27 min |
| Sep 3, 4:36 PM MDT | Special Weather Statement | RIW | Sweetwater | 24 min |
| Sep 3, 4:45 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 31 min |
| Sep 3, 5:14 PM MDT | Areal Flood Advisory | CYS | Laramie | 12 min |
| Sep 3, 5:25 PM MDT | Flash Flood Warning | CYS | Laramie | 3 hr |
| Sep 3, 5:31 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 26 min |
| Sep 3, 6:11 PM MDT | Special Weather Statement | CYS | Niobrara | 34 min |
| Sep 3, 6:20 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 25 min |
| Sep 3, 6:30 PM MDT | Special Weather Statement | CYS | Niobrara | 30 min |
| Sep 4, 1:39 PM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 24 hr |
| Sep 4, 2:20 PM MDT | Fire Weather Watch | BYZ | Big Horn, Johnson, Sheridan, Washakie | 24 hr |
| Sep 5, 2:13 AM MDT | Fire Weather Watch | RIW | Fremont, Hot Springs, Johnson, Lincoln, Natrona, Park and 4 more | 24 hr |
| Sep 5, 2:16 AM MDT | Fire Weather Watch | CYS | 15 hr | |
| Sep 5, 1:44 PM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 29 hr |
| Sep 5, 1:49 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 5, 1:49 PM MDT | Red Flag Warning | RIW | Fremont, Hot Springs, Johnson, Lincoln, Natrona, Park and 4 more | 30 hr |
| Sep 5, 2:29 PM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 30 hr |
| Sep 7, 2:06 PM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 48 hr |
| Sep 7, 2:23 PM MDT | Fire Weather Watch | CYS | 28 hr | |
| Sep 8, 2:49 AM MDT | Fire Weather Watch | RIW | Fremont, Hot Springs, Lincoln, Park, Sublette, Teton | 24 hr |
| Sep 8, 6:02 PM MDT | Fire Weather Watch | CYS | 26 hr | |
| Sep 8, 6:02 PM MDT | Red Flag Warning | CYS | 26 hr | |
| Sep 9, 2:26 AM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 41 hr |
| Sep 9, 2:52 AM MDT | Fire Weather Watch | RIW | Fremont, Hot Springs, Johnson, Natrona, Sweetwater, Washakie | 23 hr |
| Sep 9, 2:52 AM MDT | Red Flag Warning | RIW | Fremont, Hot Springs, Lincoln, Park, Sublette, Teton | 17 hr |
| Sep 9, 7:55 PM MDT | Red Flag Warning | CYS | 24 hr | |
| Sep 10, 1:51 AM MDT | Red Flag Warning | RIW | Fremont, Hot Springs, Johnson, Natrona, Park, Sweetwater and 1 more | 18 hr |
| Sep 10, 1:42 PM MDT | Special Weather Statement | SLC | Uinta | 48 min |
| Sep 10, 1:46 PM MDT | Severe Thunderstorm Warning | SLC | Uinta | 44 min |
| Sep 10, 2:48 PM MDT | Special Weather Statement | SLC | Uinta | 42 min |
| Sep 10, 2:53 PM MDT | Special Weather Statement | RIW | 52 min | |
| Sep 10, 3:20 PM MDT | Special Weather Statement | RIW | Sublette | 25 min |
| Sep 10, 4:01 PM MDT | Special Weather Statement | RIW | Sublette | 44 min |
| Sep 10, 4:03 PM MDT | Special Weather Statement | RIW | Hot Springs | 27 min |
| Sep 10, 4:23 PM MDT | Special Weather Statement | RIW | Sweetwater | 22 min |
| Sep 10, 4:41 PM MDT | Special Weather Statement | RIW | Fremont | 49 min |
| Sep 10, 4:43 PM MDT | Special Weather Statement | RIW | Hot Springs | 32 min |
| Sep 10, 5:13 PM MDT | Special Weather Statement | RIW | Hot Springs | 32 min |
| Sep 10, 5:24 PM MDT | Special Weather Statement | RIW | Fremont | 36 min |
| Sep 10, 5:28 PM MDT | Severe Thunderstorm Warning | RIW | Fremont | 34 min |
| Sep 10, 5:35 PM MDT | Special Weather Statement | RIW | Fremont | 25 min |
| Sep 10, 5:45 PM MDT | Special Weather Statement | CYS | Carbon | 45 min |
| Sep 10, 6:01 PM MDT | Severe Thunderstorm Warning | RIW | Fremont, Hot Springs, Natrona, Washakie | 44 min |
| Sep 10, 6:44 PM MDT | Special Weather Statement | RIW | Natrona | 31 min |
| Sep 10, 7:15 PM MDT | Special Weather Statement | RIW | Natrona | 30 min |
| Sep 10, 8:03 PM MDT | Special Weather Statement | RIW | Lincoln | 27 min |
| Sep 11, 3:03 AM MDT | Red Flag Warning | CYS | 16 hr | |
| Sep 11, 1:49 PM MDT | Special Weather Statement | RIW | Natrona | 26 min |
| Sep 11, 4:22 PM MDT | Special Weather Statement | CYS | Albany | 38 min |
| Sep 11, 5:04 PM MDT | Special Weather Statement | CYS | Carbon | 41 min |
| Sep 11, 5:51 PM MDT | Special Weather Statement | CYS | Carbon | 54 min |
| Sep 11, 6:22 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 38 min |
| Sep 12, 3:25 PM MDT | Special Weather Statement | CYS | Laramie | 35 min |
| Sep 12, 4:59 PM MDT | Mesoscale Discussion | SPC | Lincoln | 91 min |
| Sep 12, 5:21 PM MDT | Special Weather Statement | RIW | 24 min | |
| Sep 12, 6:21 PM MDT | Severe Thunderstorm Warning | RIW | Lincoln | 24 min |
| Sep 12, 6:25 PM MDT | Special Weather Statement | RIW | Sublette | 35 min |
| Sep 12, 6:44 PM MDT | Special Weather Statement | RIW | Lincoln | 31 min |
| Sep 12, 7:59 PM MDT | Special Weather Statement | RIW | 31 min | |
| Sep 12, 8:25 PM MDT | Special Weather Statement | RIW | 35 min | |
| Sep 12, 8:30 PM MDT | Special Weather Statement | RIW | 30 min | |
| Sep 12, 8:50 PM MDT | Special Weather Statement | RIW | 25 min | |
| Sep 12, 10:10 PM MDT | Special Weather Statement | RIW | Natrona | 35 min |
| Sep 12, 10:20 PM MDT | Special Weather Statement | RIW | 25 min | |
| Sep 12, 10:53 PM MDT | Special Weather Statement | RIW | Lincoln | 37 min |
| Sep 12, 11:46 PM MDT | Special Weather Statement | RIW | 29 min | |
| Sep 12, 11:49 PM MDT | Special Weather Statement | RIW | 26 min | |
| Sep 12, 11:52 PM MDT | Special Weather Statement | RIW | 23 min | |
| Sep 13, 1:56 AM MDT | Special Weather Statement | RIW | Sweetwater | 34 min |
| Sep 13, 2:35 AM MDT | Special Weather Statement | RIW | 40 min | |
| Sep 13, 3:45 AM MDT | Special Weather Statement | CYS | Carbon | 45 min |
| Sep 13, 3:59 AM MDT | Severe Thunderstorm Warning | CYS | Albany, Carbon | 46 min |
| Sep 13, 4:40 AM MDT | Special Weather Statement | CYS | Albany | 50 min |
| Sep 13, 7:11 PM MDT | Special Weather Statement | BYZ | Sheridan | 34 min |
| Sep 13, 7:21 PM MDT | Special Weather Statement | BYZ | Sheridan | 24 min |
| Sep 13, 7:44 PM MDT | Special Weather Statement | BYZ | Sheridan | 46 min |
| Sep 13, 8:20 PM MDT | Special Weather Statement | BYZ | Sheridan | 40 min |
| Sep 13, 8:49 PM MDT | Special Weather Statement | UNR | Campbell | 26 min |
| Sep 13, 9:13 PM MDT | Special Weather Statement | UNR | Campbell | 32 min |
| Sep 13, 9:48 PM MDT | Special Weather Statement | UNR | Crook | 27 min |
| Sep 13, 10:14 PM MDT | Special Weather Statement | UNR | Crook | 31 min |
| Sep 14, 1:36 AM MDT | Fire Weather Watch | RIW | Fremont, Hot Springs, Johnson, Lincoln, Natrona, Sublette and 3 more | 12 hr |
| Sep 14, 2:51 AM MDT | Fire Weather Watch | CYS | 11 hr | |
| Sep 14, 1:04 PM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 31 hr |
| Sep 14, 1:14 PM MDT | Red Flag Warning | RIW | Fremont, Hot Springs, Johnson, Lincoln, Natrona, Park and 4 more | 55 hr |
| Sep 14, 1:27 PM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 14 hr |
| Sep 14, 2:01 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 14, 4:27 PM MDT | Special Weather Statement | UNR | Crook | 48 min |
| Sep 14, 4:33 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 57 min |
| Sep 14, 5:56 PM MDT | Special Weather Statement | UNR | Weston | 49 min |
| Sep 15, 2:52 AM MDT | Fire Weather Watch | CYS | 11 hr | |
| Sep 15, 3:09 AM MDT | Red Flag Warning | UNR | Campbell | 16 hr |
| Sep 15, 2:07 PM MDT | Fire Weather Watch | CYS | 24 hr | |
| Sep 15, 2:07 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 16, 1:45 PM MDT | Fire Weather Watch | CYS | 24 hr | |
| Sep 16, 1:45 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 16, 1:53 PM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 55 hr |
| Sep 16, 1:59 PM MDT | Red Flag Warning | RIW | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 6 more | 54 hr |
| Sep 17, 2:44 AM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 11 hr |
| Sep 17, 2:44 AM MDT | Red Flag Warning | UNR | Campbell | 17 hr |
| Sep 17, 1:17 PM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 32 hr |
| Sep 17, 1:52 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 19, 12:56 AM MDT | High Wind Warning | CYS | Albany, Carbon | 20 hr |
| Sep 19, 1:48 PM MDT | Freeze Watch | CYS | Albany, Carbon, Converse, Laramie, Platte | 24 hr |
| Sep 19, 1:48 PM MDT | Freeze Warning | CYS | Albany, Carbon | 18 hr |
| Sep 19, 4:18 PM MDT | Freeze Watch | RIW | Fremont, Lincoln, Natrona, Sublette, Sweetwater | 22 hr |
| Sep 20, 1:26 PM MDT | Frost Advisory | CYS | Albany, Laramie, Platte | 19 hr |
| Sep 20, 1:26 PM MDT | Freeze Warning | CYS | Albany, Carbon, Converse, Laramie, Platte | 19 hr |
| Sep 20, 1:52 PM MDT | Freeze Warning | RIW | Fremont, Lincoln, Natrona, Sublette, Sweetwater | 18 hr |
| Sep 20, 2:22 PM MDT | Frost Advisory | UNR | Campbell, Crook, Weston | 17 hr |
| Sep 21, 2:12 AM MDT | Fire Weather Watch | RIW | Fremont, Lincoln, Natrona, Sweetwater, Uinta | 11 hr |
| Sep 21, 3:23 AM MDT | Fire Weather Watch | CYS | 10 hr | |
| Sep 21, 1:36 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 21, 1:37 PM MDT | Red Flag Warning | RIW | Fremont, Lincoln, Natrona, Sweetwater, Uinta | 30 hr |
| Sep 24, 1:45 AM MDT | Fire Weather Watch | RIW | Fremont, Lincoln, Natrona, Sweetwater, Uinta | 24 hr |
| Sep 24, 2:19 AM MDT | Fire Weather Watch | CYS | 11 hr | |
| Sep 24, 1:18 PM MDT | Red Flag Warning | CYS | 31 hr | |
| Sep 25, 1:42 AM MDT | Red Flag Warning | RIW | Fremont, Lincoln, Natrona, Sweetwater, Uinta | 17 hr |
| Sep 25, 2:06 AM MDT | Fire Weather Watch | CYS | 24 hr | |
| Sep 26, 1:37 AM MDT | Red Flag Warning | CYS | 18 hr | |
| Sep 27, 1:45 AM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 11 hr |
| Sep 27, 1:50 AM MDT | Fire Weather Watch | BYZ | Big Horn, Johnson, Sheridan, Washakie | 12 hr |
| Sep 27, 2:05 AM MDT | Fire Weather Watch | RIW | Big Horn, Fremont, Hot Springs, Johnson, Natrona, Park and 1 more | 12 hr |
| Sep 27, 1:01 PM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 30 hr |
| Sep 27, 1:37 PM MDT | Red Flag Warning | RIW | Big Horn, Fremont, Hot Springs, Johnson, Natrona, Park and 1 more | 28 hr |
| Sep 27, 2:06 PM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 31 hr |
| Sep 28, 2:02 AM MDT | Red Flag Warning | CYS | 18 hr | |
| Sep 30, 7:00 AM MDT | Dense Fog Advisory | CYS | Albany, Laramie | 3 hr |
| Sep 30, 2:24 PM MDT | Frost Advisory | CYS | Converse, Goshen, Laramie, Niobrara, Platte | 18 hr |
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 | 13 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 77 |
| Flooding | |
| Flash Flood Warning | 1 |
| Areal Flood Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| Fire | |
| Red Flag Warning | 30 |
| Fire Weather Watch | 24 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fremont County24
- Lincoln County20
- Natrona County20
- Sweetwater County19
- Johnson County16
- Laramie County16
- Crook County16
- Washakie County16
- Sublette County15
- Uinta County15
- Campbell County15
- Hot Springs County15
- Weston County13
- Albany County11
- Carbon County11
- Sheridan County10
- Big Horn County9
- Park County9
- Niobrara County7
- Platte County6
- Goshen County3
- Teton County3
- Converse County3
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.