Alert archive / Wyoming / Weston County
Weather alerts in Weston County, Wyoming, 2011
116 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 116
- Warnings
- 43
- Watches
- 24
- Advisories
- 25
- Busiest month
- July27 alerts
- Busiest day
- July 2, 201113 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 4 tornado warnings covering Weston County in 2011 had a tornado report inside them.
Weston County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 22 | 14 | 36% | 19 | 74% | 24 min |
| Flash flood warnings | 2 | 1 | 50% | 3 | 100% | 95 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 23 | 2 | 91% | 5 | 40% | 55 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 426 | 315 | 26% | 626 | 88% | 25 min |
| NWS Rapid City, SD: flash flood warnings | 30 | 10 | 67% | 16 | 94% | 70 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 |
|---|---|---|---|
| Dec 31, 10:00 PM MST | Wind Chill Advisory | UNR | 12 hr |
| Jan 7, 2:38 AM MST | Winter Storm Watch | UNR | 11 hr |
| Jan 7, 1:26 PM MST | Winter Storm Warning | UNR | 47 hr |
| Jan 7, 1:26 PM MST | Winter Weather Advisory | UNR | 58 hr |
| Jan 16, 2:44 PM MST | Winter Weather Advisory | UNR | 20 hr |
| Jan 18, 2:02 PM MST | Winter Weather Advisory | UNR | 21 hr |
| Jan 20, 2:44 PM MST | Winter Storm Watch | UNR | 24 hr |
| Jan 21, 2:23 PM MST | Winter Storm Warning | UNR | 28 hr |
| Jan 29, 2:03 PM MST | Winter Weather Advisory | UNR | 48 hr |
| Jan 31, 2:44 AM MST | Wind Chill Warning | UNR | 33 hr |
| Feb 1, 4:09 AM MST | Wind Chill Advisory | UNR | 16 hr |
| Feb 1, 2:54 PM MST | Wind Chill Warning | UNR | 19 hr |
| Feb 2, 3:10 AM MST | Wind Chill Advisory | UNR | 7 hr |
| Feb 4, 2:12 PM MST | Winter Storm Warning | UNR | 48 hr |
| Feb 4, 2:12 PM MST | Winter Weather Advisory | UNR | 48 hr |
| Feb 6, 2:39 PM MST | Winter Weather Advisory | UNR | 30 hr |
| Feb 8, 2:41 PM MST | Wind Chill Advisory | UNR | 19 hr |
| Feb 18, 1:56 PM MST | Winter Storm Watch | UNR | 13 hr |
| Feb 19, 2:35 AM MST | Winter Storm Warning | UNR | 44 hr |
| Feb 23, 2:26 PM MST | Winter Weather Advisory | UNR | 38 hr |
| Feb 25, 4:01 AM MST | Winter Weather Advisory | UNR | 24 hr |
| Mar 5, 2:03 PM MST | Winter Storm Watch | UNR | 13 hr |
| Mar 6, 2:40 AM MST | Winter Weather Advisory | UNR | 32 hr |
| Mar 25, 3:18 AM MDT | Winter Weather Advisory | UNR | 39 hr |
| Apr 13, 4:32 AM MDT | Winter Storm Watch | UNR | 24 hr |
| Apr 14, 4:07 AM MDT | Winter Weather Advisory | UNR | 24 hr |
| Apr 21, 2:53 PM MDT | Winter Storm Watch | UNR | 13 hr |
| Apr 22, 3:51 AM MDT | Winter Storm Warning | UNR | 24 hr |
| Apr 26, 1:52 PM MDT | Winter Storm Warning | UNR | 7 hr |
| Apr 26, 9:04 PM MDT | Winter Weather Advisory | UNR | 10 hr |
| Apr 30, 2:44 AM MDT | High Wind Warning | UNR | 16 hr |
| May 7, 9:13 PM MDT | Flood Watch | UNR | 63 hr |
| May 9, 1:17 PM MDT | Mesoscale Discussion | SPC | 58 min |
| May 9, 2:26 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 9, 4:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 9, 5:42 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| May 9, 5:53 PM MDT | Flash Flood Warning | UNR | 5 hr |
| May 9, 6:11 PM MDT | Severe Thunderstorm Warning | UNR | 79 min |
| May 9, 8:16 PM MDT | Mesoscale Discussion | SPC | 29 min |
| May 9, 10:19 PM MDT | Areal Flood Warning | UNR | 16 hr |
| May 16, 2:59 PM MDT | Flash Flood Watch | UNR | 4 days |
| May 24, 6:04 PM MDT | Areal Flood Advisory | UNR | 6 hr |
| May 24, 10:53 PM MDT | Areal Flood Advisory | UNR | 11 hr |
| May 26, 4:17 PM MDT | Severe Thunderstorm Warning | UNR | 43 min |
| May 27, 2:49 PM MDT | Flood Watch | UNR | 61 hr |
| Jun 6, 3:04 PM MDT | High Wind Warning | UNR | 14 hr |
| Jun 6, 3:50 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 8, 9:52 PM MDT | Severe Thunderstorm Warning | UNR | 38 min |
| Jun 9, 7:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jun 11, 1:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 3:59 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 11, 7:11 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 12, 10:02 AM MDT | Flash Flood Watch | UNR | 10 hr |
| Jun 12, 12:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jun 12, 1:49 PM MDT | Tornado Watch | SPC | 6 hr |
| Jun 12, 3:52 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jun 24, 1:25 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 24, 1:52 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 6:43 PM MDT | Severe Thunderstorm Warning | UNR | 32 min |
| Jun 24, 7:11 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jun 25, 1:24 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jun 25, 6:53 PM MDT | Severe Thunderstorm Warning | UNR | 42 min |
| Jun 25, 7:15 PM MDT | Severe Thunderstorm Warning | UNR | 45 min |
| Jun 25, 8:11 PM MDT | Severe Thunderstorm Warning | UNR | 27 min |
| Jun 30, 2:19 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jul 2, 12:17 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 2, 2:13 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 2, 2:37 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jul 2, 3:23 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| Jul 2, 3:59 PM MDT | Tornado Warning | UNR | 46 min |
| Jul 2, 4:27 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jul 2, 4:30 PM MDT | Flash Flood Warning | UNR | 6 hr |
| Jul 2, 4:50 PM MDT | Tornado Warning | UNR | 23 min |
| Jul 2, 4:53 PM MDT | Tornado Warning | UNR | 52 min |
| Jul 2, 4:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 5:01 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jul 2, 5:35 PM MDT | Severe Thunderstorm Warning | UNR | 40 min |
| Jul 2, 5:52 PM MDT | Tornado Warning | UNR | 21 min |
| Jul 2, 6:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 5, 3:19 PM MDT | Areal Flood Advisory | UNR | 5 hr |
| Jul 5, 6:19 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jul 5, 6:50 PM MDT | Severe Thunderstorm Warning | UNR | 40 min |
| Jul 11, 1:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 11, 2:07 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 2:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 25, 11:23 AM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 25, 1:30 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 2:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 27, 5:13 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 29, 12:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 29, 1:54 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 29, 4:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Aug 3, 1:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 4, 5:04 PM MDT | Areal Flood Advisory | UNR | 3 hr |
| Aug 5, 12:05 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 2:55 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 5, 4:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 7:27 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| Aug 8, 8:19 PM MDT | Severe Thunderstorm Warning | UNR | 45 min |
| Aug 9, 3:51 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Aug 25, 3:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 29, 2:34 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 29, 6:31 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Sep 20, 8:00 PM MDT | Frost Advisory | UNR | 11 hr |
| Oct 6, 2:19 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Oct 6, 2:32 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Oct 17, 2:52 PM MDT | Freeze Warning | UNR | 18 hr |
| Oct 31, 2:52 PM MDT | Winter Weather Advisory | UNR | 31 hr |
| Nov 4, 2:36 PM MDT | Winter Weather Advisory | UNR | 32 hr |
| Nov 17, 2:15 PM MST | Winter Storm Watch | UNR | 22 hr |
| Nov 18, 12:19 PM MST | Winter Storm Warning | UNR | 26 hr |
| Nov 29, 3:43 AM MST | Winter Storm Watch | UNR | 11 hr |
| Nov 29, 3:04 PM MST | Winter Storm Warning | UNR | 39 hr |
| Dec 3, 3:11 PM MST | Winter Weather Advisory | UNR | 32 hr |
| Dec 20, 2:46 PM MST | Winter Weather Advisory | UNR | 32 hr |
| Dec 30, 2:36 PM MST | High Wind Warning | UNR | 26 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.