Alert archive / Wyoming / Teton County
Weather alerts in Teton County, Wyoming, 2025
75 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Teton County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 75
- Warnings
- 23
- Watches
- 10
- Advisories
- 26
- Busiest month
- December15 alerts
- Busiest day
- May 11, 20256 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado reports fell inside a warning.
Teton County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 2 | 1 | 50% | 1 | 100% | 24 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Riverton, WY: tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| NWS Riverton, WY: severe thunderstorm warnings | 108 | 21 | 81% | 104 | 26% | 15 min |
| NWS Riverton, WY: flash flood warnings | 1 | 0 | 100% | 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 1, 12:15 PM MST | Winter Storm Warning | RIW | 22 hr |
| Jan 2, 6:56 PM MST | Winter Weather Advisory | RIW | 18 hr |
| Jan 10, 2:09 AM MST | Winter Weather Advisory | RIW | 3 days |
| Jan 18, 8:07 PM MST | Cold Weather Advisory | RIW | 62 hr |
| Jan 29, 1:15 PM MST | Winter Storm Watch | RIW | 24 hr |
| Jan 30, 12:48 PM MST | Winter Storm Warning | RIW | 4 days |
| Feb 6, 1:52 AM MST | Winter Storm Warning | RIW | 43 hr |
| Feb 6, 1:52 AM MST | Winter Weather Advisory | RIW | 43 hr |
| Feb 11, 1:35 AM MST | Cold Weather Advisory | RIW | 56 hr |
| Feb 12, 1:42 AM MST | Winter Storm Watch | RIW | 11 hr |
| Feb 12, 12:29 PM MST | Winter Storm Warning | RIW | 71 hr |
| Feb 12, 12:29 PM MST | Winter Weather Advisory | RIW | 71 hr |
| Feb 15, 1:19 AM MST | Winter Storm Watch | RIW | 13 hr |
| Feb 15, 2:26 PM MST | Winter Storm Warning | RIW | 3 days |
| Feb 15, 2:26 PM MST | Winter Weather Advisory | RIW | 3 days |
| Feb 22, 11:47 AM MST | Winter Weather Advisory | RIW | 43 hr |
| Feb 23, 11:28 AM MST | Winter Storm Warning | RIW | 20 hr |
| Mar 5, 1:19 AM MST | Winter Storm Warning | RIW | 52 hr |
| Mar 5, 1:19 AM MST | Winter Weather Advisory | RIW | 52 hr |
| Mar 12, 1:19 AM MDT | Winter Weather Advisory | RIW | 62 hr |
| Mar 15, 11:11 PM MDT | Winter Weather Advisory | RIW | 19 hr |
| Mar 17, 2:54 AM MDT | Winter Storm Warning | RIW | 44 hr |
| Mar 17, 2:54 AM MDT | Winter Weather Advisory | RIW | 51 hr |
| Mar 20, 1:09 PM MDT | Winter Weather Advisory | RIW | 53 hr |
| Mar 31, 12:52 AM MDT | Winter Weather Advisory | RIW | 65 hr |
| May 11, 12:39 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 11, 1:12 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 11, 3:12 PM MDT | Severe Thunderstorm Warning | RIW | 33 min |
| May 11, 3:44 PM MDT | Severe Thunderstorm Warning | RIW | 31 min |
| May 11, 4:13 PM MDT | Special Weather Statement | RIW | 47 min |
| May 11, 4:34 PM MDT | Mesoscale Discussion | SPC | 116 min |
| May 12, 11:36 PM MDT | River Flood Advisory | RIW | 42 hr |
| May 22, 4:43 PM MDT | Special Weather Statement | RIW | 32 min |
| May 22, 5:18 PM MDT | Special Weather Statement | RIW | 27 min |
| May 26, 4:34 PM MDT | Special Weather Statement | RIW | 41 min |
| Jun 10, 4:54 PM MDT | Special Weather Statement | RIW | 36 min |
| Jun 11, 1:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jun 11, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 21, 12:51 PM MDT | Freeze Warning | RIW | 43 hr |
| Jul 4, 12:20 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 15, 2:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 3:31 PM MDT | Special Weather Statement | RIW | 44 min |
| Jul 15, 4:15 PM MDT | Special Weather Statement | RIW | 30 min |
| Jul 15, 4:45 PM MDT | Special Weather Statement | RIW | 30 min |
| Jul 15, 5:10 PM MDT | Special Weather Statement | RIW | 35 min |
| Jul 30, 4:43 PM MDT | Special Weather Statement | RIW | 32 min |
| Aug 3, 2:19 AM MDT | Red Flag Warning | RIW | 6 days |
| Aug 12, 1:14 PM MDT | Red Flag Warning | RIW | 55 hr |
| Sep 11, 1:37 PM MDT | Special Weather Statement | RIW | 23 min |
| Sep 15, 10:45 AM MDT | Freeze Warning | RIW | 20 hr |
| Sep 22, 1:22 AM MDT | Freeze Watch | RIW | 12 hr |
| Sep 22, 1:11 PM MDT | Freeze Warning | RIW | 19 hr |
| Oct 3, 1:02 PM MDT | Winter Weather Advisory | RIW | 58 hr |
| Oct 4, 12:38 PM MDT | Freeze Warning | RIW | 21 hr |
| Oct 14, 1:06 PM MDT | Winter Weather Advisory | RIW | 55 hr |
| Oct 18, 1:03 PM MDT | Winter Weather Advisory | RIW | 34 hr |
| Oct 24, 1:42 PM MDT | Winter Storm Watch | RIW | 11 hr |
| Oct 25, 1:07 AM MDT | Winter Storm Warning | RIW | 65 hr |
| Nov 5, 11:56 AM MST | Winter Weather Advisory | RIW | 25 hr |
| Nov 15, 11:51 PM MST | Winter Weather Advisory | RIW | 37 hr |
| Dec 1, 12:21 AM MST | Winter Weather Advisory | RIW | 44 hr |
| Dec 3, 12:48 PM MST | Winter Storm Watch | RIW | 14 hr |
| Dec 4, 2:22 AM MST | Winter Storm Warning | RIW | 63 hr |
| Dec 4, 2:37 AM MST | Winter Weather Advisory | RIW | 59 hr |
| Dec 7, 2:46 AM MST | Winter Weather Advisory | RIW | 26 hr |
| Dec 8, 2:02 AM MST | Winter Storm Watch | RIW | 11 hr |
| Dec 8, 2:02 AM MST | Winter Storm Warning | RIW | 58 hr |
| Dec 15, 12:58 PM MST | Winter Storm Watch | RIW | 23 hr |
| Dec 15, 1:19 PM MST | High Wind Warning | RIW | 64 hr |
| Dec 16, 11:31 AM MST | Winter Storm Warning | RIW | 35 hr |
| Dec 18, 1:24 AM MST | Winter Storm Warning | RIW | 52 hr |
| Dec 18, 1:24 AM MST | Winter Weather Advisory | RIW | 52 hr |
| Dec 20, 12:17 PM MST | Winter Storm Warning | RIW | 53 hr |
| Dec 24, 1:15 AM MST | Winter Weather Advisory | RIW | 35 hr |
| Dec 25, 12:21 PM MST | Winter Weather Advisory | RIW | 53 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 | 2 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 11 |
| Flooding | |
| River Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 14 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 23 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 1 |
| Cold Weather Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| Fire | |
| Red Flag Warning | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.