Alert archive / Wyoming / 2020
Weather alerts in Wyoming, September 2020
78 weather alerts in September 2020, 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 2020. Tap one for its archive.
- Alerts
- 78
- Warnings
- 39
- Watches
- 23
- Advisories
- 8
- Busiest day
- September 7, 20209 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 1, 2:59 AM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 42 hr |
| Sep 1, 3:10 AM MDT | Red Flag Warning | CYS | 41 hr | |
| Sep 1, 3:36 AM MDT | Red Flag Warning | RIW | Big Horn, Fremont, Hot Springs, Johnson, Natrona, Park and 2 more | 40 hr |
| Sep 1, 2:35 PM MDT | Freeze Warning | RIW | Fremont, Lincoln, Sublette, Sweetwater | 12 hr |
| Sep 3, 3:14 AM MDT | Fire Weather Watch | BYZ | Big Horn, Johnson, Sheridan, Washakie | 32 hr |
| Sep 3, 3:17 AM MDT | Fire Weather Watch | CYS | 35 hr | |
| Sep 3, 4:00 AM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 33 hr |
| Sep 3, 2:37 PM MDT | Fire Weather Watch | RIW | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 6 more | 44 hr |
| Sep 4, 11:14 AM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 57 hr |
| Sep 4, 12:31 PM MDT | Red Flag Warning | RIW | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 6 more | 3 days |
| Sep 4, 12:56 PM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 54 hr |
| Sep 4, 2:19 PM MDT | Fire Weather Watch | CYS | 30 hr | |
| Sep 4, 2:19 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 4, 2:19 PM MDT | Red Flag Warning | CYS | 54 hr | |
| Sep 6, 2:21 AM MDT | Winter Storm Watch | UNR | Crook, Weston | 24 hr |
| Sep 6, 3:09 AM MDT | Winter Weather Advisory | BYZ | Sheridan | 51 hr |
| Sep 6, 3:22 AM MDT | Winter Storm Watch | CYS | Albany, Carbon, Converse, Laramie, Platte | 25 hr |
| Sep 6, 12:33 PM MDT | Winter Storm Watch | RIW | Big Horn, Fremont, Hot Springs, Johnson, Natrona, Park and 3 more | 16 hr |
| Sep 6, 2:10 PM MDT | Red Flag Warning | CYS | 29 hr | |
| Sep 6, 2:38 PM MDT | Winter Weather Advisory | SLC | Uinta | 63 hr |
| Sep 7, 2:37 AM MDT | Winter Storm Warning | UNR | Crook, Weston | 28 hr |
| Sep 7, 2:37 AM MDT | Winter Weather Advisory | UNR | Campbell | 30 hr |
| Sep 7, 3:15 AM MDT | Winter Storm Warning | BYZ | Sheridan | 26 hr |
| Sep 7, 4:09 AM MDT | Winter Storm Warning | CYS | Albany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more | 46 hr |
| Sep 7, 4:09 AM MDT | Winter Weather Advisory | CYS | Albany, Carbon, Goshen, Laramie | 46 hr |
| Sep 7, 4:34 AM MDT | Winter Storm Warning | RIW | Big Horn, Fremont, Hot Springs, Johnson, Natrona, Park and 3 more | 37 hr |
| Sep 7, 4:34 AM MDT | Winter Weather Advisory | RIW | Fremont, Hot Springs, Johnson, Lincoln, Park, Sublette and 1 more | 37 hr |
| Sep 7, 11:25 AM MDT | High Wind Warning | RIW | Lincoln, Sublette, Teton | 17 hr |
| Sep 7, 1:28 PM MDT | Freeze Warning | CYS | Albany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more | 43 hr |
| Sep 7, 8:41 PM MDT | Dense Fog Advisory | CYS | Albany, Carbon, Laramie | 3 hr |
| Sep 8, 2:34 AM MDT | Mesoscale Discussion | SPC | Carbon, Converse, Natrona, Niobrara, Platte, Sweetwater and 1 more | 4 hr |
| Sep 8, 8:21 AM MDT | Mesoscale Discussion | SPC | Albany, Goshen, Laramie, Platte | 4 hr |
| Sep 8, 1:51 PM MDT | Freeze Warning | UNR | Campbell, Crook, Weston | 18 hr |
| Sep 8, 2:27 PM MDT | Freeze Warning | RIW | Big Horn, Hot Springs, Park, Washakie | 19 hr |
| Sep 9, 6:09 AM MDT | Freezing Fog Advisory | CYS | Albany, Laramie | 5 hr |
| Sep 9, 10:06 PM MDT | Freezing Fog Advisory | CYS | Albany, Laramie | 8 hr |
| Sep 12, 2:46 AM MDT | Fire Weather Watch | BYZ | Big Horn, Johnson, Sheridan, Washakie | 24 hr |
| Sep 12, 1:44 PM MDT | Fire Weather Watch | RIW | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 6 more | 24 hr |
| Sep 12, 1:44 PM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 24 hr |
| Sep 13, 3:11 AM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 42 hr |
| Sep 13, 1:18 PM MDT | Red Flag Warning | RIW | Fremont, Hot Springs, Johnson, Lincoln, Natrona, Park and 4 more | 32 hr |
| Sep 13, 2:03 PM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 30 hr |
| Sep 14, 11:38 AM MDT | Red Flag Warning | CYS | 8 hr | |
| Sep 16, 1:46 PM MDT | Fire Weather Watch | RIW | Fremont, Lincoln, Natrona, Park, Sublette, Sweetwater and 2 more | 22 hr |
| Sep 17, 1:37 AM MDT | Fire Weather Watch | CYS | 36 hr | |
| Sep 17, 1:46 PM MDT | Red Flag Warning | CYS | 29 hr | |
| Sep 17, 1:58 PM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 23 hr |
| Sep 17, 2:15 PM MDT | Fire Weather Watch | RIW | Johnson, Natrona | 21 hr |
| Sep 17, 2:38 PM MDT | Fire Weather Watch | BYZ | Big Horn, Johnson, Sheridan, Washakie | 23 hr |
| Sep 18, 10:48 AM MDT | Red Flag Warning | RIW | Johnson, Natrona | 32 hr |
| Sep 18, 1:23 PM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 31 hr |
| Sep 18, 1:49 PM MDT | Red Flag Warning | CYS | 30 hr | |
| Sep 18, 1:53 PM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 31 hr |
| Sep 19, 5:52 PM MDT | Special Weather Statement | RIW | 23 min | |
| Sep 19, 6:19 PM MDT | Special Weather Statement | RIW | Teton | 26 min |
| Sep 19, 6:43 PM MDT | Special Weather Statement | RIW | Teton | 32 min |
| Sep 20, 1:59 PM MDT | Fire Weather Watch | CYS | 13 hr | |
| Sep 20, 7:47 PM MDT | Red Flag Warning | CYS | 23 hr | |
| Sep 22, 1:46 PM MDT | Fire Weather Watch | BYZ | Big Horn, Johnson, Sheridan, Washakie | 24 hr |
| Sep 22, 2:03 PM MDT | Fire Weather Watch | UNR | Campbell, Crook, Weston | 36 hr |
| Sep 22, 2:20 PM MDT | Fire Weather Watch | CYS | 13 hr | |
| Sep 22, 5:30 PM MDT | Special Weather Statement | RIW | Fremont | 30 min |
| Sep 22, 5:53 PM MDT | Special Weather Statement | RIW | Fremont | 37 min |
| Sep 22, 6:30 PM MDT | Special Weather Statement | RIW | Fremont | 30 min |
| Sep 23, 2:43 AM MDT | Fire Weather Watch | RIW | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 6 more | 12 hr |
| Sep 23, 3:32 AM MDT | Fire Weather Watch | CYS | 23 hr | |
| Sep 23, 3:32 AM MDT | Red Flag Warning | CYS | 40 hr | |
| Sep 23, 1:22 PM MDT | Red Flag Warning | BYZ | Big Horn, Johnson, Sheridan, Washakie | 31 hr |
| Sep 23, 1:55 PM MDT | Red Flag Warning | UNR | Campbell, Crook, Weston | 30 hr |
| Sep 23, 2:21 PM MDT | Red Flag Warning | RIW | Big Horn, Fremont, Hot Springs, Johnson, Lincoln, Natrona and 6 more | 53 hr |
| Sep 24, 2:45 AM MDT | Red Flag Warning | CYS | 41 hr | |
| Sep 25, 3:52 AM MDT | High Wind Watch | CYS | Albany, Carbon, Laramie, Platte | 10 hr |
| Sep 25, 10:53 AM MDT | Red Flag Warning | BYZ | Sheridan | 33 hr |
| Sep 25, 1:58 PM MDT | Red Flag Warning | UNR | Campbell, Crook | 27 hr |
| Sep 25, 2:04 PM MDT | High Wind Warning | CYS | Albany, Carbon, Laramie, Platte | 28 hr |
| Sep 25, 7:54 PM MDT | Red Flag Warning | CYS | 21 hr | |
| Sep 29, 1:58 PM MDT | Red Flag Warning | RIW | Natrona | 5 hr |
| Sep 29, 2:05 PM MDT | Red Flag Warning | CYS | 5 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 | |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 6 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 5 |
| Cold | |
| Freeze Warning | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Fire | |
| Red Flag Warning | 29 |
| Fire Weather Watch | 19 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Freezing Fog Advisory | 2 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Johnson County20
- Big Horn County17
- Washakie County17
- Fremont County15
- Natrona County14
- Crook County13
- Weston County13
- Sweetwater County13
- Campbell County12
- Park County12
- Sublette County12
- Hot Springs County11
- Sheridan County11
- Lincoln County10
- Teton County10
- Albany County10
- Laramie County10
- Uinta County8
- Carbon County8
- Platte County7
- Converse County4
- Goshen County4
- Niobrara County3
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.