Alert archive / Wyoming / Fremont County
Weather alerts in Fremont County, Wyoming, 2024
220 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Fremont County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 220
- Warnings
- 61
- Watches
- 40
- Advisories
- 49
- Busiest month
- August42 alerts
- Busiest day
- September 17, 20247 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Fremont County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 3 | 70% | 27 | 37% | 12 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Riverton, WY: tornado warnings | 0 | 1 | 0% | |||
| NWS Riverton, WY: severe thunderstorm warnings | 28 | 8 | 71% | 69 | 26% | 15 min |
| NWS Riverton, WY: flash flood warnings | 4 | 0 | 100% | 1 | 0% |
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 | Lasted |
|---|---|---|---|
| Jan 8, 3:02 AM MST | Winter Storm Watch | RIW | 10 hr |
| Jan 8, 12:57 PM MST | Winter Storm Warning | RIW | 55 hr |
| Jan 8, 12:57 PM MST | Winter Weather Advisory | RIW | 55 hr |
| Jan 9, 12:00 PM MST | High Wind Warning | RIW | 11 hr |
| Jan 10, 7:43 PM MST | Winter Storm Watch | RIW | 8 hr |
| Jan 11, 3:43 AM MST | Winter Storm Warning | RIW | 49 hr |
| Jan 11, 3:43 AM MST | Winter Weather Advisory | RIW | 49 hr |
| Jan 11, 1:15 PM MST | Wind Chill Warning | RIW | 70 hr |
| Jan 11, 1:15 PM MST | Wind Chill Advisory | RIW | 70 hr |
| Jan 14, 2:30 PM MST | Wind Chill Advisory | RIW | 45 hr |
| Jan 16, 1:57 AM MST | Winter Storm Watch | RIW | 13 hr |
| Jan 16, 2:56 PM MST | Winter Storm Warning | RIW | 44 hr |
| Jan 31, 10:50 PM MST | Dense Fog Advisory | RIW | 13 hr |
| Feb 1, 12:41 PM MST | Winter Weather Advisory | RIW | 70 hr |
| Feb 4, 1:24 PM MST | Winter Weather Advisory | RIW | 40 hr |
| Feb 5, 11:41 AM MST | Winter Storm Warning | RIW | 17 hr |
| Feb 6, 4:40 AM MST | Winter Weather Advisory | RIW | 54 hr |
| Feb 8, 1:10 PM MST | Winter Weather Advisory | RIW | 47 hr |
| Feb 12, 2:46 PM MST | Winter Weather Advisory | RIW | 38 hr |
| Feb 13, 2:03 AM MST | Winter Storm Watch | RIW | 25 hr |
| Feb 14, 3:09 AM MST | Winter Storm Warning | RIW | 62 hr |
| Feb 14, 3:09 AM MST | Winter Weather Advisory | RIW | 62 hr |
| Feb 23, 12:30 PM MST | High Wind Watch | RIW | 24 hr |
| Feb 24, 12:55 AM MST | Winter Storm Watch | RIW | 37 hr |
| Feb 24, 12:50 PM MST | High Wind Warning | RIW | 55 hr |
| Feb 25, 2:54 AM MST | Winter Storm Warning | RIW | 55 hr |
| Feb 27, 12:49 PM MST | High Wind Watch | RIW | 13 hr |
| Feb 28, 2:00 AM MST | High Wind Warning | RIW | 15 hr |
| Feb 28, 2:01 AM MST | Winter Storm Watch | RIW | 36 hr |
| Feb 28, 1:31 PM MST | Winter Storm Warning | RIW | 3 days |
| Feb 28, 2:07 PM MST | High Wind Watch | RIW | 12 hr |
| Feb 29, 2:07 AM MST | High Wind Watch | RIW | 24 hr |
| Feb 29, 12:25 PM MST | High Wind Warning | RIW | 53 hr |
| Feb 29, 2:41 PM MST | Winter Weather Advisory | RIW | 54 hr |
| Mar 4, 1:52 AM MST | Winter Storm Watch | RIW | 12 hr |
| Mar 4, 1:53 PM MST | Winter Storm Warning | RIW | 45 hr |
| Mar 4, 1:53 PM MST | Winter Weather Advisory | RIW | 45 hr |
| Mar 11, 1:54 PM MDT | Winter Weather Advisory | RIW | 33 hr |
| Mar 12, 1:31 AM MDT | Winter Weather Advisory | RIW | 58 hr |
| Mar 12, 3:07 AM MDT | Winter Storm Watch | RIW | 12 hr |
| Mar 12, 2:56 PM MDT | Winter Storm Warning | RIW | 45 hr |
| Mar 22, 2:03 PM MDT | Winter Weather Advisory | RIW | 52 hr |
| Mar 27, 2:41 AM MDT | Winter Weather Advisory | RIW | 44 hr |
| Mar 29, 2:54 AM MDT | Winter Storm Watch | RIW | 12 hr |
| Mar 29, 2:44 PM MDT | Winter Storm Warning | RIW | 56 hr |
| Mar 29, 2:44 PM MDT | Winter Weather Advisory | RIW | 65 hr |
| Apr 3, 1:01 PM MDT | Winter Storm Watch | RIW | 37 hr |
| Apr 5, 2:05 AM MDT | Winter Storm Warning | RIW | 3 days |
| Apr 5, 2:05 AM MDT | Winter Weather Advisory | RIW | 3 days |
| Apr 14, 2:13 PM MDT | Winter Storm Watch | RIW | 36 hr |
| Apr 16, 2:14 AM MDT | Winter Storm Warning | RIW | 48 hr |
| Apr 16, 2:14 AM MDT | Winter Weather Advisory | RIW | 45 hr |
| Apr 25, 1:34 PM MDT | Winter Storm Warning | RIW | 48 hr |
| Apr 25, 1:34 PM MDT | Winter Weather Advisory | RIW | 48 hr |
| May 2, 1:49 PM MDT | Winter Weather Advisory | RIW | 25 hr |
| May 4, 2:29 AM MDT | High Wind Watch | RIW | 24 hr |
| May 4, 4:07 AM MDT | Winter Storm Watch | RIW | 33 hr |
| May 4, 1:23 PM MDT | High Wind Warning | RIW | 56 hr |
| May 5, 4:03 AM MDT | Winter Storm Warning | RIW | 3 days |
| May 5, 4:03 AM MDT | Winter Weather Advisory | RIW | 4 days |
| May 8, 12:46 PM MDT | Winter Storm Warning | RIW | 29 hr |
| May 20, 3:30 AM MDT | Winter Weather Advisory | RIW | 39 hr |
| May 20, 12:56 PM MDT | Winter Storm Warning | RIW | 29 hr |
| May 22, 3:28 AM MDT | Winter Weather Advisory | RIW | 39 hr |
| Jun 6, 8:53 AM MDT | River Flood Advisory | RIW | 4 days |
| Jun 7, 3:53 PM MDT | River Flood Advisory | RIW | 70 hr |
| Jun 7, 3:53 PM MDT | River Flood Advisory | RIW | 70 hr |
| Jun 7, 3:53 PM MDT | River Flood Advisory | RIW | 70 hr |
| Jun 7, 3:53 PM MDT | River Flood Advisory | RIW | 70 hr |
| Jun 7, 3:53 PM MDT | River Flood Advisory | RIW | 5 days |
| Jun 7, 3:53 PM MDT | River Flood Advisory | RIW | 5 days |
| Jun 10, 2:50 PM MDT | Areal Flood Advisory | RIW | 4 days |
| Jun 21, 3:00 PM MDT | Special Weather Statement | RIW | 45 min |
| Jun 21, 3:12 PM MDT | Special Weather Statement | RIW | 33 min |
| Jun 21, 3:16 PM MDT | Special Weather Statement | RIW | 44 min |
| Jun 26, 9:08 PM MDT | Special Weather Statement | RIW | 37 min |
| Jul 5, 1:34 PM MDT | Fire Weather Watch | RIW | 13 hr |
| Jul 6, 2:12 AM MDT | Red Flag Warning | RIW | 18 hr |
| Jul 9, 2:11 PM MDT | Heat Advisory | RIW | 12 min |
| Jul 9, 2:29 PM MDT | Heat Advisory | RIW | 5 days |
| Jul 10, 4:51 PM MDT | Special Weather Statement | RIW | 24 min |
| Jul 13, 6:12 PM MDT | Special Weather Statement | RIW | 63 min |
| Jul 14, 3:36 PM MDT | Special Weather Statement | RIW | 39 min |
| Jul 14, 6:49 PM MDT | Special Weather Statement | RIW | 56 min |
| Jul 14, 7:45 PM MDT | Special Weather Statement | RIW | 45 min |
| Jul 15, 1:50 PM MDT | Special Weather Statement | RIW | 25 min |
| Jul 15, 2:14 PM MDT | Special Weather Statement | RIW | 31 min |
| Jul 15, 2:24 PM MDT | Severe Thunderstorm Warning | RIW | 51 min |
| Jul 15, 2:43 PM MDT | Severe Thunderstorm Warning | RIW | 47 min |
| Jul 16, 1:22 PM MDT | Special Weather Statement | RIW | 38 min |
| Jul 16, 2:02 PM MDT | Special Weather Statement | RIW | 58 min |
| Jul 16, 2:31 PM MDT | Special Weather Statement | RIW | 44 min |
| Jul 17, 4:06 PM MDT | Special Weather Statement | RIW | 24 min |
| Jul 17, 4:31 PM MDT | Special Weather Statement | RIW | 29 min |
| Jul 17, 5:00 PM MDT | Special Weather Statement | RIW | 30 min |
| Jul 19, 1:48 PM MDT | Special Weather Statement | RIW | 42 min |
| Jul 19, 2:33 PM MDT | Special Weather Statement | RIW | 27 min |
| Jul 19, 3:12 PM MDT | Special Weather Statement | RIW | 33 min |
| Jul 20, 1:16 PM MDT | Special Weather Statement | RIW | 29 min |
| Jul 20, 2:52 PM MDT | Special Weather Statement | RIW | 23 min |
| Jul 20, 3:09 PM MDT | Special Weather Statement | RIW | 36 min |
| Jul 20, 3:12 PM MDT | Special Weather Statement | RIW | 33 min |
| Jul 20, 3:23 PM MDT | Severe Thunderstorm Warning | RIW | 22 min |
| Jul 20, 3:43 PM MDT | Special Weather Statement | RIW | 32 min |
| Jul 23, 1:03 PM MDT | Fire Weather Watch | RIW | 24 hr |
| Jul 23, 5:45 PM MDT | Special Weather Statement | RIW | 15 min |
| Jul 24, 1:04 PM MDT | Red Flag Warning | RIW | 32 hr |
| Jul 26, 4:57 PM MDT | Special Weather Statement | RIW | 33 min |
| Jul 26, 5:29 PM MDT | Special Weather Statement | RIW | 31 min |
| Jul 27, 1:13 PM MDT | Red Flag Warning | RIW | 31 hr |
| Jul 27, 10:58 PM MDT | Special Weather Statement | RIW | 47 min |
| Jul 28, 12:55 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 1:18 PM MDT | Fire Weather Watch | RIW | 12 hr |
| Jul 29, 1:46 AM MDT | Red Flag Warning | RIW | 42 hr |
| Aug 3, 2:09 PM MDT | Red Flag Warning | RIW | 31 hr |
| Aug 4, 7:18 AM MDT | Special Weather Statement | RIW | 27 min |
| Aug 5, 1:15 AM MDT | Fire Weather Watch | RIW | 26 hr |
| Aug 6, 3:15 AM MDT | Red Flag Warning | RIW | 41 hr |
| Aug 6, 5:53 PM MDT | Special Weather Statement | RIW | 37 min |
| Aug 9, 2:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 9, 4:48 PM MDT | Special Weather Statement | RIW | 27 min |
| Aug 10, 2:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 3:12 PM MDT | Special Weather Statement | RIW | 33 min |
| Aug 10, 3:54 PM MDT | Special Weather Statement | RIW | 36 min |
| Aug 13, 2:50 PM MDT | Special Weather Statement | RIW | 25 min |
| Aug 13, 3:19 PM MDT | Special Weather Statement | RIW | 26 min |
| Aug 13, 4:47 PM MDT | Special Weather Statement | RIW | 28 min |
| Aug 13, 4:55 PM MDT | Special Weather Statement | RIW | 20 min |
| Aug 13, 5:16 PM MDT | Special Weather Statement | RIW | 29 min |
| Aug 14, 12:12 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 14, 12:25 PM MDT | Special Weather Statement | RIW | 35 min |
| Aug 14, 12:43 PM MDT | Special Weather Statement | RIW | 32 min |
| Aug 14, 1:00 PM MDT | Special Weather Statement | RIW | 30 min |
| Aug 14, 1:40 PM MDT | Special Weather Statement | RIW | 35 min |
| Aug 14, 2:12 PM MDT | Special Weather Statement | RIW | 33 min |
| Aug 15, 1:13 PM MDT | Fire Weather Watch | RIW | 14 hr |
| Aug 16, 2:59 AM MDT | Red Flag Warning | RIW | 17 hr |
| Aug 17, 4:14 PM MDT | Severe Thunderstorm Warning | RIW | 31 min |
| Aug 17, 5:12 PM MDT | Severe Thunderstorm Warning | RIW | 33 min |
| Aug 17, 5:23 PM MDT | Severe Thunderstorm Warning | RIW | 22 min |
| Aug 17, 5:43 PM MDT | Severe Thunderstorm Warning | RIW | 32 min |
| Aug 19, 5:41 PM MDT | Special Weather Statement | RIW | 34 min |
| Aug 19, 6:16 PM MDT | Special Weather Statement | RIW | 29 min |
| Aug 20, 2:12 AM MDT | Fire Weather Watch | RIW | 11 hr |
| Aug 20, 1:01 PM MDT | Red Flag Warning | RIW | 31 hr |
| Aug 23, 3:35 AM MDT | Fire Weather Watch | RIW | 10 hr |
| Aug 23, 1:35 PM MDT | Red Flag Warning | RIW | 31 hr |
| Aug 23, 7:08 PM MDT | Special Weather Statement | RIW | 37 min |
| Aug 25, 4:30 PM MDT | Special Weather Statement | RIW | 30 min |
| Aug 25, 5:14 PM MDT | Special Weather Statement | RIW | 31 min |
| Aug 26, 6:44 AM MDT | Special Weather Statement | RIW | 46 min |
| Aug 26, 7:50 AM MDT | Special Weather Statement | RIW | 40 min |
| Aug 26, 8:13 AM MDT | Severe Thunderstorm Warning | RIW | 47 min |
| Aug 26, 8:43 AM MDT | Severe Thunderstorm Warning | RIW | 47 min |
| Aug 27, 1:28 AM MDT | Fire Weather Watch | RIW | 9 hr |
| Aug 27, 10:50 AM MDT | Red Flag Warning | RIW | 33 hr |
| Sep 3, 2:47 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Sep 3, 3:06 PM MDT | Special Weather Statement | RIW | 24 min |
| Sep 3, 3:31 PM MDT | Special Weather Statement | RIW | 29 min |
| Sep 3, 3:58 PM MDT | Special Weather Statement | RIW | 32 min |
| Sep 8, 1:38 PM MDT | Red Flag Warning | RIW | 30 hr |
| Sep 10, 12:10 PM MDT | Special Weather Statement | RIW | 35 min |
| Sep 10, 1:52 PM MDT | Fire Weather Watch | RIW | 24 hr |
| Sep 10, 3:59 PM MDT | Special Weather Statement | RIW | 61 min |
| Sep 11, 1:22 PM MDT | Red Flag Warning | RIW | 30 hr |
| Sep 11, 1:50 PM MDT | Special Weather Statement | RIW | 25 min |
| Sep 12, 12:03 AM MDT | Special Weather Statement | RIW | 27 min |
| Sep 13, 2:01 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Sep 13, 2:13 PM MDT | Red Flag Warning | RIW | 29 hr |
| Sep 15, 4:47 PM MDT | Special Weather Statement | RIW | 28 min |
| Sep 15, 5:14 PM MDT | Severe Thunderstorm Warning | RIW | 31 min |
| Sep 15, 5:40 PM MDT | Special Weather Statement | RIW | 35 min |
| Sep 17, 1:14 AM MDT | High Wind Watch | RIW | 10 hr |
| Sep 17, 8:51 AM MDT | Special Weather Statement | RIW | 24 min |
| Sep 17, 9:14 AM MDT | Special Weather Statement | RIW | 31 min |
| Sep 17, 10:16 AM MDT | Special Weather Statement | RIW | 29 min |
| Sep 17, 11:43 AM MDT | High Wind Warning | RIW | 28 hr |
| Sep 17, 12:25 PM MDT | Special Weather Statement | RIW | 35 min |
| Sep 17, 4:16 PM MDT | Special Weather Statement | RIW | 44 min |
| Sep 20, 12:49 AM MDT | Red Flag Warning | RIW | 18 hr |
| Sep 25, 1:16 PM MDT | Red Flag Warning | RIW | 30 hr |
| Sep 27, 2:18 PM MDT | Fire Weather Watch | RIW | 23 hr |
| Sep 28, 1:26 PM MDT | Red Flag Warning | RIW | 54 hr |
| Sep 30, 12:47 AM MDT | Freeze Watch | RIW | 13 hr |
| Sep 30, 1:33 PM MDT | Freeze Warning | RIW | 19 hr |
| Sep 30, 1:40 PM MDT | Fire Weather Watch | RIW | 13 hr |
| Oct 1, 2:13 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Oct 1, 2:13 AM MDT | Red Flag Warning | RIW | 42 hr |
| Oct 2, 7:42 PM MDT | Fire Weather Watch | RIW | 17 hr |
| Oct 3, 12:34 PM MDT | Red Flag Warning | RIW | 56 hr |
| Oct 15, 2:04 PM MDT | Winter Storm Watch | RIW | 24 hr |
| Oct 16, 1:48 PM MDT | Winter Weather Advisory | RIW | 52 hr |
| Oct 16, 2:07 PM MDT | Freeze Watch | RIW | 22 hr |
| Oct 17, 12:26 PM MDT | Freeze Warning | RIW | 46 hr |
| Oct 27, 1:45 PM MDT | Winter Storm Watch | RIW | 12 hr |
| Oct 28, 1:40 AM MDT | Winter Storm Warning | RIW | 53 hr |
| Oct 28, 1:40 AM MDT | Winter Weather Advisory | RIW | 53 hr |
| Nov 1, 1:37 PM MDT | Winter Weather Advisory | RIW | 43 hr |
| Nov 2, 12:51 PM MDT | Winter Weather Advisory | RIW | 38 hr |
| Nov 4, 1:49 AM MST | Winter Weather Advisory | RIW | 51 hr |
| Nov 5, 1:27 AM MST | Winter Storm Warning | RIW | 32 hr |
| Nov 14, 11:44 AM MST | Winter Weather Advisory | RIW | 44 hr |
| Nov 17, 12:55 AM MST | Winter Storm Warning | RIW | 45 hr |
| Nov 17, 12:55 AM MST | Winter Weather Advisory | RIW | 45 hr |
| Nov 23, 1:58 AM MST | Winter Weather Advisory | RIW | 34 hr |
| Nov 25, 1:24 AM MST | Winter Weather Advisory | RIW | 52 hr |
| Dec 13, 12:17 AM MST | Winter Storm Watch | RIW | 12 hr |
| Dec 13, 12:29 PM MST | Winter Storm Warning | RIW | 53 hr |
| Dec 13, 12:29 PM MST | Winter Weather Advisory | RIW | 53 hr |
| Dec 15, 11:46 PM MST | Winter Storm Warning | RIW | 41 hr |
| Dec 15, 11:46 PM MST | Winter Weather Advisory | RIW | 41 hr |
| Dec 17, 1:37 PM MST | High Wind Watch | RIW | 11 hr |
| Dec 18, 12:53 AM MST | High Wind Warning | RIW | 25 hr |
| Dec 21, 11:59 AM MST | Winter Weather Advisory | RIW | 55 hr |
| Dec 25, 1:58 AM MST | Winter Storm Watch | RIW | 11 hr |
| Dec 25, 1:02 PM MST | Winter Storm Warning | RIW | 56 hr |
| Dec 25, 1:02 PM MST | Winter Weather Advisory | RIW | 56 hr |
| Dec 26, 1:51 PM MST | Winter Storm Watch | RIW | 31 hr |
| Dec 27, 8:32 PM MST | Winter Storm Warning | RIW | 62 hr |
| Dec 27, 8:32 PM MST | Winter Weather Advisory | RIW | 62 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 | 10 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 65 |
| Flooding | |
| Areal Flood Advisory | 1 |
| River Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 23 |
| Winter Storm Watch | 17 |
| Winter Weather Advisory | 36 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 1 |
| Freeze Watch | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 7 |
| High Wind Watch | 7 |
| Fire | |
| Red Flag Warning | 18 |
| Fire Weather Watch | 14 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.