Alert archive / Wyoming / Weston County
Weather alerts in Weston County, Wyoming, 2020
166 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Weston County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 166
- Warnings
- 59
- Watches
- 35
- Advisories
- 18
- Busiest month
- July45 alerts
- Busiest day
- July 20, 20207 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Weston County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 30 | 25 | 17% | 23 | 91% | 19 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 11 | 2 | 82% | 11 | 27% | 18 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 415 | 336 | 19% | 828 | 89% | 27 min |
| NWS Rapid City, SD: flash flood warnings | 10 | 7 | 30% | 11 | 91% | 88 min |
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, 2:06 PM MST | Winter Weather Advisory | UNR | 21 hr |
| Jan 9, 1:35 PM MST | Winter Weather Advisory | UNR | 17 hr |
| Jan 30, 1:38 AM MST | Winter Weather Advisory | UNR | 15 hr |
| Jan 31, 1:46 PM MST | Winter Storm Watch | UNR | 37 hr |
| Feb 1, 2:27 PM MST | Winter Storm Warning | UNR | 57 hr |
| Feb 2, 2:37 AM MST | Winter Weather Advisory | UNR | 44 hr |
| Feb 5, 2:05 PM MST | Winter Weather Advisory | UNR | 39 hr |
| Feb 7, 2:15 PM MST | Winter Weather Advisory | UNR | 38 hr |
| Feb 11, 2:14 PM MST | Winter Weather Advisory | UNR | 23 hr |
| Feb 23, 2:27 AM MST | Winter Storm Watch | UNR | 12 hr |
| Feb 23, 2:01 PM MST | Winter Storm Warning | UNR | 48 hr |
| Feb 24, 2:28 AM MST | Winter Weather Advisory | UNR | 36 hr |
| Feb 26, 2:47 AM MST | Winter Weather Advisory | UNR | 32 hr |
| Mar 7, 2:19 AM MST | Red Flag Warning | UNR | 16 hr |
| Mar 13, 3:13 AM MDT | Winter Weather Advisory | UNR | 32 hr |
| Mar 18, 2:10 AM MDT | Winter Weather Advisory | UNR | 40 hr |
| Mar 31, 3:46 AM MDT | Winter Storm Watch | UNR | 24 hr |
| Mar 31, 2:05 PM MDT | Winter Weather Advisory | UNR | 58 hr |
| Apr 1, 3:48 AM MDT | Winter Storm Warning | UNR | 31 hr |
| Apr 9, 2:02 AM MDT | Winter Storm Watch | UNR | 37 hr |
| Apr 10, 2:35 PM MDT | Winter Storm Warning | UNR | 42 hr |
| Apr 10, 2:35 PM MDT | Winter Weather Advisory | UNR | 39 hr |
| Apr 30, 6:22 PM MDT | Special Weather Statement | UNR | 38 min |
| May 3, 2:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 3:34 PM MDT | Severe Thunderstorm Warning | UNR | 41 min |
| May 3, 5:19 PM MDT | Severe Thunderstorm Warning | UNR | 41 min |
| May 13, 8:43 PM MDT | Special Weather Statement | UNR | 32 min |
| May 13, 9:15 PM MDT | Special Weather Statement | UNR | 30 min |
| May 13, 9:45 PM MDT | Special Weather Statement | UNR | 30 min |
| May 20, 1:07 PM MDT | Mesoscale Discussion | SPC | 83 min |
| May 20, 2:22 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 20, 4:47 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| May 20, 5:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| May 20, 5:42 PM MDT | Severe Thunderstorm Warning | UNR | 48 min |
| May 23, 12:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 23, 1:04 PM MDT | Severe Thunderstorm Warning | UNR | 41 min |
| May 23, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 2:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 31, 2:27 PM MDT | Special Weather Statement | UNR | 33 min |
| May 31, 3:34 PM MDT | Special Weather Statement | UNR | 26 min |
| May 31, 3:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 31, 3:45 PM MDT | Severe Thunderstorm Warning | UNR | 25 min |
| May 31, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 2, 2:23 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 6:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 4, 1:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 4, 6:48 PM MDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jun 4, 6:51 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jun 4, 7:43 PM MDT | Severe Thunderstorm Warning | UNR | 77 min |
| Jun 5, 7:01 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 6, 12:27 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 6, 1:23 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 6, 3:12 PM MDT | Special Weather Statement | UNR | 33 min |
| Jun 6, 4:29 PM MDT | Severe Thunderstorm Warning | UNR | 61 min |
| Jun 6, 5:09 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jun 6, 6:09 PM MDT | Severe Thunderstorm Warning | UNR | 36 min |
| Jun 7, 7:15 PM MDT | Special Weather Statement | UNR | 30 min |
| Jun 13, 4:03 PM MDT | Special Weather Statement | UNR | 57 min |
| Jun 13, 4:39 PM MDT | Special Weather Statement | UNR | 66 min |
| Jun 13, 5:13 PM MDT | Severe Thunderstorm Warning | UNR | 27 min |
| Jun 21, 1:05 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 4:40 PM MDT | Special Weather Statement | UNR | 50 min |
| Jun 28, 1:11 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:39 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 28, 5:18 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 29, 3:56 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 29, 5:53 PM MDT | Severe Thunderstorm Warning | UNR | 26 min |
| Jun 29, 10:54 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jun 30, 2:19 AM MDT | Special Weather Statement | UNR | 56 min |
| Jul 1, 4:00 AM MDT | Red Flag Warning | UNR | 16 hr |
| Jul 2, 12:01 PM MDT | Red Flag Warning | UNR | 8 hr |
| Jul 2, 1:13 PM MDT | Special Weather Statement | UNR | 47 min |
| Jul 2, 1:20 PM MDT | Severe Thunderstorm Warning | UNR | 28 min |
| Jul 4, 8:01 PM MDT | Special Weather Statement | UNR | 44 min |
| Jul 4, 8:40 PM MDT | Special Weather Statement | UNR | 65 min |
| Jul 5, 3:00 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 4:13 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 6:24 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jul 5, 6:28 PM MDT | Severe Thunderstorm Warning | UNR | 35 min |
| Jul 5, 7:20 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jul 6, 1:55 PM MDT | Fire Weather Watch | UNR | 13 hr |
| Jul 6, 2:45 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 5:14 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 6, 6:21 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jul 7, 3:07 AM MDT | Red Flag Warning | UNR | 17 hr |
| Jul 7, 2:35 PM MDT | Fire Weather Watch | UNR | 12 hr |
| Jul 7, 2:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 8, 2:36 AM MDT | Red Flag Warning | UNR | 17 hr |
| Jul 9, 12:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 9, 2:33 PM MDT | Fire Weather Watch | UNR | 12 hr |
| Jul 9, 8:49 PM MDT | Special Weather Statement | UNR | 41 min |
| Jul 9, 9:45 PM MDT | Severe Thunderstorm Warning | UNR | 45 min |
| Jul 10, 2:26 AM MDT | Red Flag Warning | UNR | 17 hr |
| Jul 10, 2:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 1:28 AM MDT | Fire Weather Watch | UNR | 24 hr |
| Jul 12, 1:28 AM MDT | Red Flag Warning | UNR | 19 hr |
| Jul 16, 3:13 AM MDT | Fire Weather Watch | UNR | 16 hr |
| Jul 16, 7:39 PM MDT | Red Flag Warning | UNR | 24 hr |
| Jul 19, 2:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 19, 4:06 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 5:39 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jul 19, 5:43 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 19, 6:31 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jul 19, 6:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 20, 3:51 AM MDT | Special Weather Statement | UNR | 39 min |
| Jul 20, 12:13 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 12:55 PM MDT | Special Weather Statement | UNR | 20 min |
| Jul 20, 2:19 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jul 20, 3:17 PM MDT | Severe Thunderstorm Warning | UNR | 17 min |
| Jul 21, 7:32 PM MDT | Special Weather Statement | UNR | 28 min |
| Jul 23, 2:55 AM MDT | Red Flag Warning | UNR | 17 hr |
| Jul 26, 1:27 PM MDT | Special Weather Statement | UNR | 48 min |
| Jul 26, 2:28 PM MDT | Special Weather Statement | UNR | 32 min |
| Jul 27, 1:54 PM MDT | Flash Flood Watch | UNR | 56 hr |
| Aug 3, 5:50 PM MDT | Special Weather Statement | UNR | 40 min |
| Aug 3, 6:35 PM MDT | Special Weather Statement | UNR | 40 min |
| Aug 6, 5:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 5:49 PM MDT | Special Weather Statement | UNR | 26 min |
| Aug 6, 6:02 PM MDT | Severe Thunderstorm Warning | UNR | 43 min |
| Aug 6, 6:59 PM MDT | Severe Thunderstorm Warning | UNR | 22 min |
| Aug 6, 7:31 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Aug 8, 1:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 8, 4:57 PM MDT | Severe Thunderstorm Warning | UNR | 35 min |
| Aug 10, 1:55 PM MDT | Fire Weather Watch | UNR | 30 hr |
| Aug 11, 4:01 AM MDT | Fire Weather Watch | UNR | 24 hr |
| Aug 12, 3:40 AM MDT | Red Flag Warning | UNR | 40 hr |
| Aug 18, 2:28 AM MDT | Red Flag Warning | UNR | 16 hr |
| Aug 27, 3:53 AM MDT | Special Weather Statement | UNR | 37 min |
| Aug 27, 4:07 AM MDT | Severe Thunderstorm Warning | UNR | 68 min |
| Aug 27, 1:27 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 27, 4:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 27, 5:31 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 27, 6:47 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Aug 29, 7:06 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Aug 30, 1:40 PM MDT | Fire Weather Watch | UNR | 48 hr |
| Sep 1, 2:59 AM MDT | Red Flag Warning | UNR | 42 hr |
| Sep 3, 4:00 AM MDT | Fire Weather Watch | UNR | 33 hr |
| Sep 4, 12:56 PM MDT | Red Flag Warning | UNR | 54 hr |
| Sep 6, 2:21 AM MDT | Winter Storm Watch | UNR | 24 hr |
| Sep 7, 2:37 AM MDT | Winter Storm Warning | UNR | 28 hr |
| Sep 8, 2:34 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Sep 8, 1:51 PM MDT | Freeze Warning | UNR | 18 hr |
| Sep 12, 1:44 PM MDT | Fire Weather Watch | UNR | 24 hr |
| Sep 13, 2:03 PM MDT | Red Flag Warning | UNR | 30 hr |
| Sep 17, 1:58 PM MDT | Fire Weather Watch | UNR | 23 hr |
| Sep 18, 1:23 PM MDT | Red Flag Warning | UNR | 31 hr |
| Sep 22, 2:03 PM MDT | Fire Weather Watch | UNR | 36 hr |
| Sep 23, 1:55 PM MDT | Red Flag Warning | UNR | 30 hr |
| Oct 7, 3:00 AM MDT | Fire Weather Watch | UNR | 11 hr |
| Oct 7, 1:30 PM MDT | Red Flag Warning | UNR | 29 hr |
| Oct 9, 3:12 AM MDT | Fire Weather Watch | UNR | 11 hr |
| Oct 9, 2:06 PM MDT | Red Flag Warning | UNR | 29 hr |
| Oct 13, 2:45 AM MDT | High Wind Watch | UNR | 11 hr |
| Oct 13, 1:50 PM MDT | High Wind Warning | UNR | 28 hr |
| Oct 17, 2:43 AM MDT | Winter Weather Advisory | UNR | 27 hr |
| Oct 21, 2:29 PM MDT | Winter Weather Advisory | UNR | 24 hr |
| Oct 22, 2:42 PM MDT | Winter Storm Watch | UNR | 23 hr |
| Oct 23, 2:05 PM MDT | Winter Storm Warning | UNR | 44 hr |
| Oct 23, 2:05 PM MDT | Winter Weather Advisory | UNR | 47 hr |
| Nov 17, 2:15 AM MST | High Wind Watch | UNR | 11 hr |
| Nov 17, 1:06 PM MST | High Wind Warning | UNR | 16 hr |
| Dec 21, 1:43 PM MST | Winter Weather Advisory | UNR | 24 hr |
| Dec 21, 1:45 PM MST | High Wind Watch | UNR | 13 hr |
| Dec 22, 3:13 AM MST | High Wind Warning | UNR | 34 hr |
| Dec 22, 1:25 PM MST | Winter Storm Warning | UNR | 19 hr |
| Dec 28, 3:06 AM MST | Winter Weather Advisory | UNR | 37 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 | 30 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 29 |
| Special Weather Statement | 25 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 18 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 3 |
| Fire | |
| Red Flag Warning | 18 |
| Fire Weather Watch | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.