Alert archive / Wyoming / Natrona County
Weather alerts in Natrona County, Wyoming, 2025
177 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Natrona County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 177
- Warnings
- 67
- Watches
- 25
- Advisories
- 23
- Busiest month
- June50 alerts
- Busiest day
- June 17, 202514 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 warnings covering Natrona County in 2025 had a tornado report inside them.
Natrona County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 39 | 9 | 77% | 25 | 56% | 19 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 10, 2:09 AM MST | Winter Weather Advisory | RIW | 3 days |
| Jan 16, 1:29 AM MST | Winter Weather Advisory | RIW | 49 hr |
| Jan 18, 8:07 PM MST | Cold Weather Advisory | RIW | 62 hr |
| Jan 21, 12:36 PM MST | Winter Weather Advisory | RIW | 40 hr |
| Jan 30, 12:15 PM MST | High Wind Warning | RIW | 49 hr |
| Feb 1, 12:55 PM MST | High Wind Watch | RIW | 20 hr |
| Feb 1, 12:55 PM MST | Winter Weather Advisory | RIW | 52 hr |
| Feb 2, 1:20 AM MST | High Wind Warning | RIW | 25 hr |
| Feb 4, 2:25 AM MST | High Wind Watch | RIW | 10 hr |
| Feb 4, 12:52 PM MST | High Wind Warning | RIW | 31 hr |
| Feb 12, 12:46 PM MST | High Wind Watch | RIW | 12 hr |
| Feb 13, 1:09 AM MST | High Wind Warning | RIW | 28 hr |
| Feb 15, 2:26 PM MST | Winter Weather Advisory | RIW | 3 days |
| Feb 24, 11:33 AM MST | High Wind Warning | RIW | 30 hr |
| Mar 4, 12:58 AM MST | Winter Storm Watch | RIW | 24 hr |
| Mar 5, 1:19 AM MST | Winter Storm Warning | RIW | 52 hr |
| Mar 12, 1:19 AM MDT | Winter Weather Advisory | RIW | 62 hr |
| Mar 14, 2:20 PM MDT | High Wind Watch | RIW | 23 hr |
| Mar 15, 1:17 PM MDT | High Wind Warning | RIW | 47 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 18, 12:10 PM MDT | Winter Weather Advisory | RIW | 11 hr |
| Mar 21, 2:52 AM MDT | High Wind Watch | RIW | 10 hr |
| Mar 21, 12:52 PM MDT | High Wind Warning | RIW | 32 hr |
| Mar 26, 4:37 AM MDT | Fire Weather Watch | RIW | 7 hr |
| Mar 26, 11:15 AM MDT | Red Flag Warning | RIW | 32 hr |
| Mar 28, 1:16 PM MDT | Winter Weather Advisory | RIW | 53 hr |
| Mar 31, 12:52 AM MDT | Winter Weather Advisory | RIW | 65 hr |
| Apr 15, 1:43 AM MDT | Winter Storm Watch | RIW | 25 hr |
| Apr 16, 2:31 AM MDT | Winter Storm Warning | RIW | 57 hr |
| Apr 16, 2:31 AM MDT | Winter Weather Advisory | RIW | 57 hr |
| Apr 27, 1:23 AM MDT | Winter Weather Advisory | RIW | 41 hr |
| May 5, 1:58 AM MDT | Winter Weather Advisory | RIW | 34 hr |
| May 11, 6:24 PM MDT | Special Weather Statement | RIW | 66 min |
| May 12, 2:26 AM MDT | Winter Storm Watch | RIW | 23 hr |
| May 13, 1:30 AM MDT | Winter Weather Advisory | RIW | 41 hr |
| May 18, 1:30 AM MDT | Winter Weather Advisory | RIW | 47 hr |
| May 24, 2:05 PM MDT | Special Weather Statement | RIW | 25 min |
| May 27, 4:02 PM MDT | Special Weather Statement | RIW | 28 min |
| May 27, 5:27 PM MDT | Special Weather Statement | RIW | 48 min |
| May 27, 5:29 PM MDT | Special Weather Statement | RIW | 46 min |
| Jun 1, 6:31 PM MDT | Special Weather Statement | RIW | 29 min |
| Jun 1, 6:42 PM MDT | Tornado Warning | RIW | 33 min |
| Jun 1, 6:53 PM MDT | Severe Thunderstorm Warning | RIW | 37 min |
| Jun 1, 7:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 1, 7:09 PM MDT | Severe Thunderstorm Warning | RIW | 36 min |
| Jun 1, 7:27 PM MDT | Severe Thunderstorm Warning | RIW | 33 min |
| Jun 1, 7:32 PM MDT | Severe Thunderstorm Warning | RIW | 28 min |
| Jun 1, 7:59 PM MDT | Special Weather Statement | RIW | 31 min |
| Jun 1, 8:36 PM MDT | Special Weather Statement | RIW | 24 min |
| Jun 6, 3:34 PM MDT | Special Weather Statement | RIW | 26 min |
| Jun 11, 6:57 PM MDT | Special Weather Statement | RIW | 33 min |
| Jun 12, 7:39 PM MDT | Special Weather Statement | RIW | 51 min |
| Jun 12, 8:26 PM MDT | Special Weather Statement | RIW | 34 min |
| Jun 13, 2:38 PM MDT | Special Weather Statement | RIW | 52 min |
| Jun 13, 2:48 PM MDT | Severe Thunderstorm Warning | RIW | 42 min |
| Jun 13, 3:30 PM MDT | Special Weather Statement | RIW | 45 min |
| Jun 13, 4:15 PM MDT | Special Weather Statement | RIW | 30 min |
| Jun 16, 4:30 PM MDT | Special Weather Statement | RIW | 30 min |
| Jun 16, 4:43 PM MDT | Severe Thunderstorm Warning | RIW | 27 min |
| Jun 16, 4:52 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jun 16, 7:06 PM MDT | Special Weather Statement | RIW | 39 min |
| Jun 16, 7:25 PM MDT | Special Weather Statement | RIW | 35 min |
| Jun 16, 7:32 PM MDT | Severe Thunderstorm Warning | RIW | 43 min |
| Jun 16, 7:33 PM MDT | Severe Thunderstorm Warning | RIW | 27 min |
| Jun 16, 7:41 PM MDT | Severe Thunderstorm Warning | RIW | 34 min |
| Jun 16, 7:58 PM MDT | Severe Thunderstorm Warning | RIW | 47 min |
| Jun 16, 8:07 PM MDT | Special Weather Statement | RIW | 23 min |
| Jun 16, 8:09 PM MDT | Severe Thunderstorm Warning | RIW | 36 min |
| Jun 16, 8:22 PM MDT | Special Weather Statement | RIW | 38 min |
| Jun 16, 8:37 PM MDT | Severe Thunderstorm Warning | RIW | 38 min |
| Jun 17, 2:00 PM MDT | Special Weather Statement | RIW | 30 min |
| Jun 17, 2:33 PM MDT | Severe Thunderstorm Warning | RIW | 27 min |
| Jun 17, 2:53 PM MDT | Severe Thunderstorm Warning | RIW | 19 min |
| Jun 17, 2:54 PM MDT | Special Weather Statement | RIW | 36 min |
| Jun 24, 4:33 PM MDT | Special Weather Statement | RIW | 27 min |
| Jun 24, 4:56 PM MDT | Severe Thunderstorm Warning | RIW | 49 min |
| Jun 24, 5:23 PM MDT | Severe Thunderstorm Warning | RIW | 38 min |
| Jun 24, 5:55 PM MDT | Special Weather Statement | RIW | 35 min |
| Jun 24, 9:36 PM MDT | Special Weather Statement | RIW | 24 min |
| Jun 24, 9:39 PM MDT | Severe Thunderstorm Warning | RIW | 36 min |
| Jun 24, 10:10 PM MDT | Severe Thunderstorm Warning | RIW | 50 min |
| Jun 24, 10:48 PM MDT | Severe Thunderstorm Warning | RIW | 42 min |
| Jun 25, 2:02 PM MDT | Special Weather Statement | RIW | 28 min |
| Jun 25, 2:29 PM MDT | Special Weather Statement | RIW | 46 min |
| Jun 25, 5:12 PM MDT | Special Weather Statement | RIW | 48 min |
| Jun 26, 12:52 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Jun 26, 12:43 PM MDT | Red Flag Warning | RIW | 32 hr |
| Jun 28, 1:00 AM MDT | Red Flag Warning | RIW | 20 hr |
| Jun 28, 7:00 PM MDT | Special Weather Statement | RIW | 30 min |
| Jun 29, 5:30 PM MDT | Special Weather Statement | RIW | 30 min |
| Jul 2, 8:02 PM MDT | Special Weather Statement | RIW | 28 min |
| Jul 4, 4:32 PM MDT | Severe Thunderstorm Warning | RIW | 28 min |
| Jul 4, 4:54 PM MDT | Severe Thunderstorm Warning | RIW | 51 min |
| Jul 4, 5:45 PM MDT | Severe Thunderstorm Warning | RIW | 15 min |
| Jul 4, 6:02 PM MDT | Special Weather Statement | RIW | 28 min |
| Jul 5, 7:57 PM MDT | Special Weather Statement | RIW | 48 min |
| Jul 5, 8:56 PM MDT | Special Weather Statement | RIW | 34 min |
| Jul 15, 2:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 4:32 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 15, 6:46 PM MDT | Severe Thunderstorm Warning | RIW | 44 min |
| Jul 15, 6:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jul 15, 6:57 PM MDT | Severe Thunderstorm Warning | RIW | 48 min |
| Jul 15, 7:30 PM MDT | Severe Thunderstorm Warning | RIW | 45 min |
| Jul 15, 8:09 PM MDT | Special Weather Statement | RIW | 36 min |
| Jul 17, 1:27 AM MDT | Red Flag Warning | RIW | 19 hr |
| Jul 18, 1:13 PM MDT | Special Weather Statement | RIW | 32 min |
| Jul 18, 3:29 PM MDT | Special Weather Statement | RIW | 31 min |
| Jul 18, 3:36 PM MDT | Special Weather Statement | RIW | 24 min |
| Jul 18, 3:42 PM MDT | Severe Thunderstorm Warning | RIW | 33 min |
| Jul 18, 3:55 PM MDT | Severe Thunderstorm Warning | RIW | 35 min |
| Jul 18, 4:26 PM MDT | Severe Thunderstorm Warning | RIW | 14 min |
| Jul 19, 12:03 PM MDT | Fire Weather Watch | RIW | 14 hr |
| Jul 20, 1:50 AM MDT | Red Flag Warning | RIW | 66 hr |
| Jul 22, 11:04 PM MDT | Special Weather Statement | RIW | 26 min |
| Jul 22, 11:29 PM MDT | Special Weather Statement | RIW | 31 min |
| Jul 23, 1:05 PM MDT | Special Weather Statement | RIW | 40 min |
| Jul 23, 1:12 PM MDT | Severe Thunderstorm Warning | RIW | 12 min |
| Jul 23, 1:34 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 1:43 PM MDT | Special Weather Statement | RIW | 47 min |
| Jul 23, 2:31 PM MDT | Special Weather Statement | RIW | 29 min |
| Jul 23, 3:02 PM MDT | Severe Thunderstorm Warning | RIW | 13 min |
| Jul 23, 3:16 PM MDT | Special Weather Statement | RIW | 29 min |
| Jul 25, 1:54 AM MDT | Fire Weather Watch | RIW | 24 hr |
| Jul 26, 1:34 AM MDT | Red Flag Warning | RIW | 18 hr |
| Jul 27, 12:52 AM MDT | Red Flag Warning | RIW | 19 hr |
| Jul 29, 2:28 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 29, 5:11 PM MDT | Special Weather Statement | RIW | 34 min |
| Jul 29, 5:18 PM MDT | Severe Thunderstorm Warning | RIW | 42 min |
| Jul 29, 5:58 PM MDT | Severe Thunderstorm Warning | RIW | 62 min |
| Jul 29, 6:38 PM MDT | Severe Thunderstorm Warning | RIW | 15 min |
| Jul 29, 7:22 PM MDT | Severe Thunderstorm Warning | RIW | 23 min |
| Jul 29, 7:42 PM MDT | Severe Thunderstorm Warning | RIW | 11 min |
| Jul 30, 2:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 30, 5:04 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 5:40 PM MDT | Special Weather Statement | RIW | 35 min |
| Jul 30, 5:53 PM MDT | Severe Thunderstorm Warning | RIW | 52 min |
| Jul 30, 6:57 PM MDT | Severe Thunderstorm Warning | RIW | 36 min |
| Jul 30, 7:50 PM MDT | Severe Thunderstorm Warning | RIW | 29 min |
| Jul 31, 1:49 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Aug 1, 3:21 PM MDT | Special Weather Statement | RIW | 24 min |
| Aug 1, 4:17 PM MDT | Special Weather Statement | RIW | 28 min |
| Aug 1, 5:37 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 3, 2:19 AM MDT | Red Flag Warning | RIW | 6 days |
| Aug 4, 1:59 PM MDT | Fire Weather Watch | RIW | 12 hr |
| Aug 6, 1:06 AM MDT | Fire Weather Watch | RIW | 24 hr |
| Aug 12, 1:18 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Aug 12, 1:14 PM MDT | Red Flag Warning | RIW | 55 hr |
| Aug 13, 2:26 PM MDT | Severe Thunderstorm Warning | RIW | 21 min |
| Aug 13, 7:42 PM MDT | Special Weather Statement | RIW | 33 min |
| Sep 15, 3:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Sep 15, 3:49 PM MDT | Special Weather Statement | RIW | 26 min |
| Sep 15, 4:05 PM MDT | Special Weather Statement | RIW | 25 min |
| Sep 15, 4:11 PM MDT | Special Weather Statement | RIW | 34 min |
| Sep 15, 4:39 PM MDT | Special Weather Statement | RIW | 36 min |
| Oct 2, 1:44 PM MDT | Winter Storm Watch | RIW | 23 hr |
| Oct 3, 1:02 PM MDT | Winter Weather Advisory | RIW | 58 hr |
| Oct 4, 12:38 PM MDT | Freeze Watch | RIW | 21 hr |
| Oct 5, 2:14 AM MDT | Freeze Warning | RIW | 32 hr |
| Oct 5, 9:58 AM MDT | Freeze Watch | RIW | 27 hr |
| Oct 6, 1:26 PM MDT | Freeze Warning | RIW | 20 hr |
| Oct 18, 12:58 PM MDT | High Wind Watch | RIW | 12 hr |
| Oct 19, 1:00 AM MDT | High Wind Warning | RIW | 23 hr |
| Oct 25, 1:19 PM MDT | Winter Weather Advisory | RIW | 53 hr |
| Nov 20, 6:37 AM MST | Dense Fog Advisory | RIW | 3 hr |
| Nov 28, 1:10 AM MST | Winter Weather Advisory | RIW | 31 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, 2:30 PM MST | High Wind Watch | RIW | 11 hr |
| Dec 8, 1:49 AM MST | High Wind Warning | RIW | 4 days |
| Dec 8, 1:21 PM MST | Winter Weather Advisory | RIW | 52 hr |
| Dec 11, 12:56 PM MST | Winter Weather Advisory | RIW | 18 hr |
| Dec 15, 1:19 PM MST | High Wind Watch | RIW | 22 hr |
| Dec 15, 1:19 PM MST | High Wind Warning | RIW | 64 hr |
| Dec 18, 11:29 AM MST | High Wind Warning | RIW | 36 hr |
| Dec 23, 11:31 AM MST | High Wind Watch | RIW | 14 hr |
| Dec 24, 1:10 AM MST | High Wind Warning | RIW | 34 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 | 39 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 9 |
| Special Weather Statement | 53 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 21 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Cold Weather Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 12 |
| High Wind Watch | 9 |
| Fire | |
| Red Flag Warning | 9 |
| Fire Weather Watch | 7 |
| 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 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.