Alert archive / Wyoming / Natrona County
Weather alerts in Natrona County, Wyoming, 2026
147 weather alerts in 2026, 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 2026. Tap one for its archive.
- Alerts
- 147
- Warnings
- 56
- Watches
- 26
- Advisories
- 19
- Busiest month
- June30 alerts
- Busiest day
- June 25, 202615 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Natrona County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 17 | 7 | 59% | 30 | 40% | 36 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Riverton, WY: tornado warnings | 1 | 1 | 0% | 3 | 33% | 2 min |
| NWS Riverton, WY: severe thunderstorm warnings | 63 | 19 | 70% | 127 | 31% | 26 min |
| NWS Riverton, WY: flash flood warnings | 3 | 2 | 33% | 3 | 67% | 79 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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 |
|---|---|---|---|
| Feb 14, 10:18 AM MST | Red Flag Warning | RIW | 55 hr |
| Feb 15, 10:34 AM MST | High Wind Watch | RIW | 23 hr |
| Feb 16, 9:40 AM MST | High Wind Warning | RIW | 33 hr |
| Feb 17, 12:16 PM MST | Winter Weather Advisory | RIW | 47 hr |
| Feb 18, 12:06 PM MST | Winter Storm Warning | RIW | 23 hr |
| Feb 23, 1:12 AM MST | Winter Weather Advisory | RIW | 59 hr |
| Feb 23, 2:56 AM MST | High Wind Watch | RIW | 33 hr |
| Feb 24, 11:51 AM MST | High Wind Warning | RIW | 31 hr |
| Feb 27, 12:05 AM MST | Red Flag Warning | RIW | 18 hr |
| Feb 28, 12:32 AM MST | Red Flag Warning | RIW | 16 hr |
| Mar 4, 1:16 PM MST | Winter Weather Advisory | RIW | 51 hr |
| Mar 10, 11:36 AM MDT | High Wind Watch | RIW | 23 hr |
| Mar 11, 3:01 AM MDT | High Wind Warning | RIW | 45 hr |
| Mar 13, 1:53 AM MDT | High Wind Watch | RIW | 11 hr |
| Mar 13, 2:12 AM MDT | Winter Storm Watch | RIW | 11 hr |
| Mar 13, 12:54 PM MDT | High Wind Warning | RIW | 34 hr |
| Mar 13, 1:23 PM MDT | Winter Weather Advisory | RIW | 34 hr |
| Mar 14, 6:43 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 17, 2:23 AM MDT | Fire Weather Watch | RIW | 11 hr |
| Mar 17, 1:19 PM MDT | Red Flag Warning | RIW | 61 hr |
| Mar 20, 2:02 AM MDT | Red Flag Warning | RIW | 43 hr |
| Mar 23, 2:48 AM MDT | Fire Weather Watch | RIW | 33 hr |
| Mar 24, 11:29 AM MDT | Red Flag Warning | RIW | 58 hr |
| Mar 27, 1:24 AM MDT | Fire Weather Watch | RIW | 13 hr |
| Mar 27, 2:02 PM MDT | Red Flag Warning | RIW | 3 days |
| Apr 1, 1:47 AM MDT | Winter Storm Watch | RIW | 9 hr |
| Apr 1, 11:14 AM MDT | Winter Storm Warning | RIW | 55 hr |
| Apr 2, 2:17 AM MDT | Winter Weather Advisory | RIW | 40 hr |
| Apr 7, 12:47 AM MDT | Red Flag Warning | RIW | 20 hr |
| Apr 12, 11:30 AM MDT | Red Flag Warning | RIW | 9 hr |
| Apr 13, 1:02 AM MDT | Red Flag Warning | RIW | 19 hr |
| Apr 15, 11:56 AM MDT | Winter Weather Advisory | RIW | 46 hr |
| Apr 16, 1:35 PM MDT | Freeze Warning | RIW | 43 hr |
| Apr 19, 10:49 AM MDT | Red Flag Warning | RIW | 33 hr |
| Apr 21, 1:23 AM MDT | Fire Weather Watch | RIW | 24 hr |
| Apr 21, 2:45 AM MDT | Winter Weather Advisory | RIW | 68 hr |
| Apr 22, 1:27 AM MDT | Red Flag Warning | RIW | 19 hr |
| Apr 22, 10:17 AM MDT | High Wind Warning | RIW | 10 hr |
| Apr 25, 11:14 PM MDT | Winter Weather Advisory | RIW | 34 hr |
| May 3, 1:06 PM MDT | Freeze Watch | RIW | 34 hr |
| May 4, 11:44 AM MDT | Winter Weather Advisory | RIW | 42 hr |
| May 4, 11:05 PM MDT | Freeze Warning | RIW | 34 hr |
| May 9, 2:12 PM MDT | Special Weather Statement | RIW | 33 min |
| May 11, 6:13 PM MDT | Special Weather Statement | RIW | 32 min |
| May 13, 3:58 PM MDT | Special Weather Statement | RIW | 47 min |
| May 16, 2:58 AM MDT | Winter Storm Watch | RIW | 9 hr |
| May 16, 11:52 AM MDT | Winter Storm Warning | RIW | 54 hr |
| May 16, 11:52 AM MDT | Winter Weather Advisory | RIW | 54 hr |
| May 18, 5:57 PM MDT | Freeze Warning | RIW | 15 hr |
| May 19, 9:35 AM MDT | Freeze Warning | RIW | 22 hr |
| Jun 5, 2:54 AM MDT | Fire Weather Watch | RIW | 10 hr |
| Jun 5, 12:36 PM MDT | Red Flag Warning | RIW | 55 hr |
| Jun 8, 12:55 AM MDT | Fire Weather Watch | RIW | 12 hr |
| Jun 8, 12:55 PM MDT | Red Flag Warning | RIW | 55 hr |
| Jun 15, 12:44 AM MDT | Fire Weather Watch | RIW | 13 hr |
| Jun 15, 1:51 PM MDT | Red Flag Warning | RIW | 31 hr |
| Jun 20, 12:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 20, 1:27 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 20, 2:15 PM MDT | Severe Thunderstorm Warning | RIW | 45 min |
| Jun 20, 2:26 PM MDT | Special Weather Statement | RIW | 34 min |
| Jun 20, 2:59 PM MDT | Severe Thunderstorm Warning | RIW | 61 min |
| Jun 20, 3:46 PM MDT | Severe Thunderstorm Warning | RIW | 44 min |
| Jun 20, 3:56 PM MDT | Severe Thunderstorm Warning | RIW | 34 min |
| Jun 24, 8:41 PM MDT | Special Weather Statement | RIW | 34 min |
| Jun 24, 8:42 PM MDT | Special Weather Statement | RIW | 33 min |
| Jun 24, 9:00 PM MDT | Severe Thunderstorm Warning | RIW | 23 min |
| Jun 25, 11:13 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:22 PM MDT | Severe Thunderstorm Warning | RIW | 23 min |
| Jun 25, 1:24 PM MDT | Special Weather Statement | RIW | 51 min |
| Jun 25, 1:38 PM MDT | Severe Thunderstorm Warning | RIW | 52 min |
| Jun 25, 1:39 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 1:40 PM MDT | Severe Thunderstorm Warning | RIW | 35 min |
| Jun 25, 1:52 PM MDT | Special Weather Statement | RIW | 38 min |
| Jun 25, 1:59 PM MDT | Severe Thunderstorm Warning | RIW | 46 min |
| Jun 25, 2:10 PM MDT | Severe Thunderstorm Warning | RIW | 50 min |
| Jun 25, 2:39 PM MDT | Areal Flood Advisory | RIW | 3 hr |
| Jun 25, 2:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 25, 2:52 PM MDT | Severe Thunderstorm Warning | RIW | 68 min |
| Jun 26, 2:35 PM MDT | Special Weather Statement | RIW | 25 min |
| Jun 27, 3:13 PM MDT | Severe Thunderstorm Warning | RIW | 47 min |
| Jul 6, 3:38 PM MDT | Special Weather Statement | RIW | 37 min |
| Jul 6, 4:43 PM MDT | Special Weather Statement | RIW | 32 min |
| Jul 6, 5:17 PM MDT | Severe Thunderstorm Warning | RIW | 29 min |
| Jul 6, 5:19 PM MDT | Severe Thunderstorm Warning | RIW | 41 min |
| Jul 7, 2:56 PM MDT | Special Weather Statement | RIW | 34 min |
| Jul 8, 1:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 10:11 AM MDT | Extreme Heat Watch | RIW | 16 hr |
| Jul 9, 12:57 PM MDT | Special Weather Statement | RIW | 48 min |
| Jul 9, 1:31 PM MDT | Special Weather Statement | RIW | 44 min |
| Jul 9, 2:08 PM MDT | Special Weather Statement | RIW | 52 min |
| Jul 9, 2:41 PM MDT | Special Weather Statement | RIW | 34 min |
| Jul 9, 3:12 PM MDT | Special Weather Statement | RIW | 33 min |
| Jul 9, 3:40 PM MDT | Special Weather Statement | RIW | 50 min |
| Jul 10, 1:59 AM MDT | Extreme Heat Warning | RIW | 5 days |
| Jul 10, 9:30 AM MDT | Fire Weather Watch | RIW | 24 hr |
| Jul 11, 9:15 AM MDT | Red Flag Warning | RIW | 37 hr |
| Jul 16, 1:49 AM MDT | Flood Watch | RIW | 21 hr |
| Jul 17, 1:55 AM MDT | Flood Watch | RIW | 20 hr |
| Jul 18, 5:11 PM MDT | Areal Flood Advisory | RIW | 3 hr |
| Jul 21, 1:57 AM MDT | Flood Watch | RIW | 66 hr |
| Jul 22, 4:52 PM MDT | Areal Flood Advisory | RIW | 3 hr |
| Jul 22, 11:25 PM MDT | Areal Flood Advisory | RIW | 3 hr |
| Jul 22, 11:30 PM MDT | Areal Flood Advisory | RIW | 3 hr |
| Jul 24, 11:26 AM MDT | Heat Advisory | RIW | 58 hr |
| Jul 31, 12:49 AM MDT | Heat Advisory | RIW | 68 hr |
| Jul 31, 9:54 AM MDT | Fire Weather Watch | RIW | 28 hr |
| Aug 1, 1:28 PM MDT | Red Flag Warning | RIW | 56 hr |
| Aug 6, 1:51 AM MDT | Red Flag Warning | RIW | 19 hr |
| Aug 7, 1:12 AM MDT | Red Flag Warning | RIW | 20 hr |
| Aug 7, 12:27 PM MDT | Red Flag Warning | RIW | 57 hr |
| Aug 9, 12:39 PM MDT | Special Weather Statement | RIW | 51 min |
| Aug 10, 2:23 AM MDT | Red Flag Warning | RIW | 19 hr |
| Aug 10, 2:00 PM MDT | Red Flag Warning | RIW | 31 hr |
| Aug 10, 3:56 PM MDT | Special Weather Statement | RIW | 34 min |
| Aug 13, 10:57 AM MDT | Areal Flood Advisory | RIW | 2 hr |
| Aug 13, 3:40 PM MDT | Special Weather Statement | RIW | 50 min |
| Aug 13, 4:12 PM MDT | Special Weather Statement | RIW | 48 min |
| Aug 13, 4:30 PM MDT | Special Weather Statement | RIW | 45 min |
| Aug 13, 4:58 PM MDT | Special Weather Statement | RIW | 47 min |
| Aug 13, 7:37 PM MDT | Areal Flood Advisory | RIW | 113 min |
| Aug 15, 1:33 PM MDT | Special Weather Statement | RIW | 27 min |
| Aug 15, 2:08 PM MDT | Special Weather Statement | RIW | 37 min |
| Aug 15, 2:40 PM MDT | Special Weather Statement | RIW | 35 min |
| Aug 15, 7:11 PM MDT | Special Weather Statement | RIW | 34 min |
| Aug 16, 1:41 PM MDT | Special Weather Statement | RIW | 19 min |
| Aug 22, 7:17 PM MDT | Severe Thunderstorm Warning | RIW | 43 min |
| Aug 22, 7:52 PM MDT | Special Weather Statement | RIW | 53 min |
| Aug 24, 6:15 PM MDT | Special Weather Statement | RIW | 60 min |
| Aug 24, 7:11 PM MDT | Special Weather Statement | RIW | 34 min |
| Aug 25, 8:23 PM MDT | Special Weather Statement | RIW | 52 min |
| Aug 27, 8:01 PM MDT | Special Weather Statement | RIW | 14 min |
| Sep 2, 2:05 AM MDT | Fire Weather Watch | RIW | 7 hr |
| Sep 2, 9:22 AM MDT | Red Flag Warning | RIW | 36 hr |
| Sep 2, 12:41 PM MDT | Special Weather Statement | RIW | 49 min |
| Sep 3, 11:12 AM MDT | Red Flag Warning | RIW | 34 hr |
| Sep 8, 12:58 AM MDT | Red Flag Warning | RIW | 68 hr |
| Sep 13, 1:00 AM MDT | Fire Weather Watch | RIW | 9 hr |
| Sep 13, 10:03 AM MDT | Red Flag Warning | RIW | 34 hr |
| Sep 13, 10:59 PM MDT | Special Weather Statement | RIW | 31 min |
| Sep 17, 10:33 AM MDT | Flood Watch | RIW | 3 days |
| Sep 18, 3:31 PM MDT | Special Weather Statement | RIW | 44 min |
| Sep 18, 3:46 PM MDT | Special Weather Statement | RIW | 44 min |
| Sep 18, 4:17 PM MDT | Special Weather Statement | RIW | 43 min |
| Sep 19, 6:22 PM MDT | Special Weather Statement | RIW | 38 min |
| Sep 19, 6:37 PM MDT | Severe Thunderstorm Warning | RIW | 23 min |
| Sep 19, 6:59 PM MDT | Severe Thunderstorm Warning | RIW | 31 min |
| Sep 19, 7:08 PM MDT | Special Weather Statement | RIW | 37 min |
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 | 17 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 41 |
| Flooding | |
| Flood Watch | 4 |
| Areal Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 10 |
| Heat | |
| Extreme Heat Warning | 1 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 1 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 4 |
| Fire | |
| Red Flag Warning | 26 |
| Fire Weather Watch | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.