Alert archive / Wyoming / Converse County
Weather alerts in Converse County, Wyoming, 2026
171 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Converse County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 171
- Warnings
- 86
- Watches
- 32
- Advisories
- 14
- Busiest month
- June55 alerts
- Busiest day
- August 15, 202610 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 Converse County in 2026 had a tornado report inside them.
Converse County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 42 | 15 | 64% | 13 | 100% | 22 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 Cheyenne, WY: tornado warnings | 18 | 5 | 72% | 10 | 70% | 12 min |
| NWS Cheyenne, WY: severe thunderstorm warnings | 350 | 140 | 60% | 293 | 76% | 22 min |
| NWS Cheyenne, WY: flash flood warnings | 28 | 12 | 57% | 35 | 86% | 38 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 |
|---|---|---|---|
| Jan 2, 7:34 PM MST | High Wind Watch | CYS | 9 hr |
| Jan 3, 4:29 AM MST | High Wind Warning | CYS | 37 hr |
| Jan 5, 2:31 PM MST | High Wind Warning | CYS | 50 hr |
| Jan 14, 1:59 AM MST | High Wind Watch | CYS | 24 hr |
| Jan 15, 1:49 AM MST | High Wind Warning | CYS | 58 hr |
| Jan 25, 1:19 AM MST | Cold Weather Advisory | CYS | 28 hr |
| Feb 8, 12:16 AM MST | High Wind Watch | CYS | 41 hr |
| Feb 8, 6:29 AM MST | High Wind Warning | CYS | 41 hr |
| Feb 13, 11:49 AM MST | Fire Weather Watch | CYS | 24 hr |
| Feb 14, 12:00 PM MST | Red Flag Warning | CYS | 29 hr |
| Feb 15, 12:27 AM MST | High Wind Watch | CYS | 45 hr |
| Feb 16, 12:28 AM MST | Winter Storm Warning | CYS | 3 days |
| Feb 16, 12:35 AM MST | Fire Weather Watch | CYS | 12 hr |
| Feb 16, 12:51 AM MST | High Wind Warning | CYS | 46 hr |
| Feb 16, 11:09 AM MST | Winter Weather Advisory | CYS | 3 days |
| Feb 16, 12:12 PM MST | Red Flag Warning | CYS | 30 hr |
| Feb 25, 12:31 PM MST | Red Flag Warning | CYS | 3 days |
| Mar 2, 12:23 AM MST | Winter Weather Advisory | CYS | 41 hr |
| Mar 4, 1:00 PM MST | Winter Weather Advisory | CYS | 57 hr |
| Mar 6, 12:54 PM MST | High Wind Warning | CYS | 3 days |
| Mar 7, 9:26 PM MST | Fire Weather Watch | CYS | 13 hr |
| Mar 7, 10:50 PM MST | High Wind Watch | CYS | 26 hr |
| Mar 8, 11:38 AM MDT | Red Flag Warning | CYS | 30 hr |
| Mar 9, 2:02 PM MDT | High Wind Watch | CYS | 45 hr |
| Mar 11, 10:39 AM MDT | High Wind Warning | CYS | 4 days |
| Mar 11, 1:09 PM MDT | Red Flag Warning | CYS | 3 days |
| Mar 14, 1:48 AM MDT | Winter Weather Advisory | CYS | 34 hr |
| Mar 14, 6:43 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 16, 12:49 AM MDT | Fire Weather Watch | CYS | 35 hr |
| Mar 17, 11:29 AM MDT | Red Flag Warning | CYS | 4 days |
| Mar 23, 12:06 PM MDT | Fire Weather Watch | CYS | 13 hr |
| Mar 24, 1:21 AM MDT | Red Flag Warning | CYS | 45 hr |
| Mar 27, 1:15 AM MDT | Fire Weather Watch | CYS | 11 hr |
| Mar 27, 12:27 PM MDT | Red Flag Warning | CYS | 3 days |
| Mar 30, 2:02 PM MDT | High Wind Warning | CYS | 8 hr |
| Apr 2, 2:07 PM MDT | Winter Weather Advisory | CYS | 28 hr |
| Apr 7, 2:36 AM MDT | Red Flag Warning | CYS | 17 hr |
| Apr 10, 12:46 PM MDT | Fire Weather Watch | CYS | 22 hr |
| Apr 11, 11:01 AM MDT | Red Flag Warning | CYS | 57 hr |
| Apr 15, 10:19 AM MDT | Red Flag Warning | CYS | 34 hr |
| Apr 15, 1:06 PM MDT | Winter Weather Advisory | CYS | 50 hr |
| Apr 17, 12:48 PM MDT | Fire Weather Watch | CYS | 25 hr |
| Apr 18, 2:12 PM MDT | Red Flag Warning | CYS | 54 hr |
| Apr 20, 1:03 PM MDT | Red Flag Warning | CYS | 55 hr |
| Apr 21, 12:20 AM MDT | High Wind Watch | CYS | 50 hr |
| Apr 22, 1:30 AM MDT | High Wind Warning | CYS | 41 hr |
| May 2, 2:09 PM MDT | Red Flag Warning | CYS | 6 hr |
| May 4, 3:15 AM MDT | Winter Weather Advisory | CYS | 54 hr |
| May 9, 12:10 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 13, 5:20 PM MDT | Special Weather Statement | CYS | 25 min |
| May 16, 1:34 AM MDT | Winter Storm Watch | CYS | 24 hr |
| May 17, 1:50 AM MDT | Winter Storm Warning | CYS | 40 hr |
| May 17, 1:50 AM MDT | Winter Weather Advisory | CYS | 40 hr |
| May 17, 12:22 PM MDT | Freeze Watch | CYS | 25 hr |
| May 18, 1:15 AM MDT | Freeze Warning | CYS | 35 hr |
| May 18, 1:00 PM MDT | Freeze Watch | CYS | 23 hr |
| May 19, 11:40 AM MDT | Freeze Warning | CYS | 22 hr |
| May 28, 3:21 PM MDT | Special Weather Statement | CYS | 39 min |
| May 28, 5:21 PM MDT | Special Weather Statement | CYS | 39 min |
| May 30, 2:46 PM MDT | Severe Thunderstorm Warning | CYS | 17 min |
| Jun 2, 1:40 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 2, 2:56 PM MDT | Severe Thunderstorm Warning | CYS | 49 min |
| Jun 2, 2:57 PM MDT | Severe Thunderstorm Warning | CYS | 48 min |
| Jun 2, 3:00 PM MDT | Severe Thunderstorm Warning | CYS | 45 min |
| Jun 2, 3:25 PM MDT | Severe Thunderstorm Warning | CYS | 50 min |
| Jun 2, 3:47 PM MDT | Tornado Warning | CYS | 17 min |
| Jun 2, 3:57 PM MDT | Severe Thunderstorm Warning | CYS | 48 min |
| Jun 2, 4:08 PM MDT | Severe Thunderstorm Warning | CYS | 30 min |
| Jun 2, 4:44 PM MDT | Severe Thunderstorm Warning | CYS | 18 min |
| Jun 4, 6:29 PM MDT | Special Weather Statement | CYS | 31 min |
| Jun 8, 10:03 AM MDT | Red Flag Warning | CYS | 4 days |
| Jun 14, 12:37 AM MDT | Fire Weather Watch | CYS | 11 hr |
| Jun 14, 11:24 AM MDT | Red Flag Warning | CYS | 34 hr |
| Jun 14, 12:44 PM MDT | Fire Weather Watch | CYS | 32 hr |
| Jun 15, 8:57 PM MDT | Red Flag Warning | CYS | 49 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, 3:25 PM MDT | Severe Thunderstorm Warning | CYS | 65 min |
| Jun 20, 3:49 PM MDT | Severe Thunderstorm Warning | CYS | 56 min |
| Jun 20, 4:29 PM MDT | Severe Thunderstorm Warning | CYS | 46 min |
| Jun 20, 4:41 PM MDT | Severe Thunderstorm Warning | CYS | 49 min |
| Jun 20, 5:08 PM MDT | Severe Thunderstorm Warning | CYS | 67 min |
| Jun 22, 11:29 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 12:36 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 22, 1:21 PM MDT | Special Weather Statement | CYS | 24 min |
| Jun 22, 1:40 PM MDT | Special Weather Statement | CYS | 35 min |
| Jun 22, 2:07 PM MDT | Severe Thunderstorm Warning | CYS | 38 min |
| Jun 22, 3:19 PM MDT | Special Weather Statement | CYS | 26 min |
| Jun 22, 3:50 PM MDT | Severe Thunderstorm Warning | CYS | 40 min |
| Jun 22, 4:23 PM MDT | Severe Thunderstorm Warning | CYS | 67 min |
| Jun 22, 6:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 22, 10:36 PM MDT | Severe Thunderstorm Warning | CYS | 24 min |
| Jun 24, 2:20 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 24, 3:50 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 24, 4:15 PM MDT | Severe Thunderstorm Warning | CYS | 45 min |
| Jun 24, 8:10 PM MDT | Severe Thunderstorm Warning | CYS | 50 min |
| Jun 24, 10:56 PM MDT | Special Weather Statement | CYS | 49 min |
| Jun 25, 11:13 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:39 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 2:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 25, 3:23 PM MDT | Severe Thunderstorm Warning | CYS | 52 min |
| Jun 25, 3:52 PM MDT | Severe Thunderstorm Warning | CYS | 23 min |
| Jun 25, 4:15 PM MDT | Severe Thunderstorm Warning | CYS | 60 min |
| Jun 25, 4:38 PM MDT | Special Weather Statement | CYS | 37 min |
| Jun 26, 2:37 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 26, 4:20 PM MDT | Special Weather Statement | CYS | 55 min |
| Jun 26, 4:56 PM MDT | Severe Thunderstorm Warning | CYS | 34 min |
| Jun 26, 5:54 PM MDT | Special Weather Statement | CYS | 36 min |
| Jun 26, 6:23 PM MDT | Severe Thunderstorm Warning | CYS | 52 min |
| Jun 26, 6:26 PM MDT | Special Weather Statement | CYS | 64 min |
| Jun 27, 11:25 AM MDT | Red Flag Warning | CYS | 9 hr |
| Jun 28, 12:43 PM MDT | Fire Weather Watch | CYS | 25 hr |
| Jun 29, 3:22 AM MDT | Red Flag Warning | CYS | 18 hr |
| Jun 29, 1:18 PM MDT | Fire Weather Watch | CYS | 11 hr |
| Jun 30, 12:07 AM MDT | Red Flag Warning | CYS | 19 hr |
| Jul 8, 1:27 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 3:46 PM MDT | Special Weather Statement | CYS | 29 min |
| Jul 10, 2:30 AM MDT | Heat Advisory | CYS | 6 days |
| Jul 10, 2:43 AM MDT | Fire Weather Watch | CYS | 40 hr |
| Jul 11, 1:33 AM MDT | Red Flag Warning | CYS | 5 days |
| Jul 17, 12:12 PM MDT | Heat Advisory | CYS | 3 days |
| Jul 22, 7:44 AM MDT | Flood Watch | CYS | 40 hr |
| Jul 24, 1:05 AM MDT | Heat Advisory | CYS | 68 hr |
| Jul 26, 8:56 PM MDT | Severe Thunderstorm Warning | CYS | 34 min |
| Jul 28, 8:34 PM MDT | Special Weather Statement | CYS | 41 min |
| Jul 28, 9:07 PM MDT | Severe Thunderstorm Warning | CYS | 23 min |
| Jul 29, 3:49 PM MDT | Severe Thunderstorm Warning | CYS | 41 min |
| Jul 31, 12:58 PM MDT | Heat Advisory | CYS | 56 hr |
| Aug 1, 12:04 PM MDT | Red Flag Warning | CYS | 57 hr |
| Aug 5, 1:20 PM MDT | Red Flag Warning | CYS | 31 hr |
| Aug 7, 2:37 PM MDT | Red Flag Warning | CYS | 54 hr |
| Aug 10, 1:03 AM MDT | Red Flag Warning | CYS | 20 hr |
| Aug 10, 1:51 PM MDT | Red Flag Warning | CYS | 31 hr |
| Aug 10, 4:00 PM MDT | Severe Thunderstorm Warning | CYS | 45 min |
| Aug 10, 4:37 PM MDT | Severe Thunderstorm Warning | CYS | 38 min |
| Aug 15, 1:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 2:50 PM MDT | Special Weather Statement | CYS | 25 min |
| Aug 15, 3:01 PM MDT | Severe Thunderstorm Warning | CYS | 32 min |
| Aug 15, 3:28 PM MDT | Special Weather Statement | CYS | 32 min |
| Aug 15, 3:50 PM MDT | Severe Thunderstorm Warning | CYS | 40 min |
| Aug 15, 3:58 PM MDT | Special Weather Statement | CYS | 32 min |
| Aug 15, 4:19 PM MDT | Special Weather Statement | CYS | 26 min |
| Aug 15, 4:26 PM MDT | Severe Thunderstorm Warning | CYS | 28 min |
| Aug 15, 4:36 PM MDT | Severe Thunderstorm Warning | CYS | 39 min |
| Aug 15, 4:45 PM MDT | Severe Thunderstorm Warning | CYS | 45 min |
| Aug 22, 1:15 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 22, 4:40 PM MDT | Severe Thunderstorm Warning | CYS | 35 min |
| Aug 22, 4:57 PM MDT | Severe Thunderstorm Warning | CYS | 48 min |
| Aug 22, 5:37 PM MDT | Severe Thunderstorm Warning | CYS | 38 min |
| Aug 22, 6:02 PM MDT | Special Weather Statement | CYS | 43 min |
| Aug 22, 6:05 PM MDT | Areal Flood Advisory | CYS | 115 min |
| Aug 22, 6:13 PM MDT | Severe Thunderstorm Warning | CYS | 47 min |
| Aug 22, 7:25 PM MDT | Severe Thunderstorm Warning | CYS | 38 min |
| Aug 22, 9:18 PM MDT | Special Weather Statement | CYS | 42 min |
| Aug 22, 9:39 PM MDT | Severe Thunderstorm Warning | CYS | 51 min |
| Aug 24, 6:52 PM MDT | Special Weather Statement | CYS | 38 min |
| Aug 26, 5:38 PM MDT | Special Weather Statement | CYS | 37 min |
| Aug 26, 5:52 PM MDT | Special Weather Statement | CYS | 38 min |
| Aug 26, 7:00 PM MDT | Special Weather Statement | CYS | 30 min |
| Aug 26, 7:34 PM MDT | Special Weather Statement | CYS | 26 min |
| Aug 29, 2:53 PM MDT | Severe Thunderstorm Warning | CYS | 52 min |
| Sep 2, 12:09 PM MDT | Red Flag Warning | CYS | 32 hr |
| Sep 2, 12:47 PM MDT | Special Weather Statement | CYS | 43 min |
| Sep 2, 1:09 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 6, 9:17 PM MDT | Severe Thunderstorm Warning | CYS | 43 min |
| Sep 8, 6:44 AM MDT | Red Flag Warning | CYS | 13 hr |
| Sep 8, 8:06 PM MDT | Red Flag Warning | CYS | 48 hr |
| Sep 13, 1:07 AM MDT | Fire Weather Watch | CYS | 12 hr |
| Sep 13, 12:57 PM MDT | Red Flag Warning | CYS | 31 hr |
| Sep 18, 4:22 PM MDT | Special Weather Statement | CYS | 53 min |
| Sep 18, 4:40 PM MDT | Special Weather Statement | CYS | 50 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 | 42 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 28 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Cold Weather Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 9 |
| High Wind Watch | 7 |
| Fire | |
| Red Flag Warning | 30 |
| Fire Weather Watch | 14 |
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.