Alert archive / Wyoming / Crook County
Weather alerts in Crook County, Wyoming, 2009
131 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Crook County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 131
- Warnings
- 47
- Watches
- 29
- Advisories
- 31
- Busiest month
- July24 alerts
- Busiest day
- June 14, 20099 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 4 tornado warnings covering Crook County in 2009 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 23 minutes after it went out.
Crook County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 2 | 100% | 23 min |
| Severe thunderstorm warnings | 29 | 20 | 31% | 23 | 96% | 35 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 27 | 6 | 78% | 10 | 90% | 19 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 262 | 172 | 34% | 345 | 79% | 27 min |
| NWS Rapid City, SD: flash flood warnings | 10 | 4 | 60% | 4 | 75% | 59 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 6, 9:45 AM MST | Winter Weather Advisory | UNR | 35 hr |
| Jan 7, 1:49 PM MST | High Wind Watch | CYS | 4 hr |
| Jan 13, 2:46 PM MST | Winter Weather Advisory | UNR | 24 hr |
| Jan 24, 1:41 AM MST | Winter Weather Advisory | CYS | 61 hr |
| Jan 29, 7:56 AM MST | Winter Weather Advisory | UNR | 19 hr |
| Feb 9, 4:13 AM MST | Winter Weather Advisory | UNR | 24 hr |
| Feb 12, 1:55 AM MST | Winter Weather Advisory | CYS | 34 hr |
| Feb 24, 1:59 PM MST | Winter Storm Watch | UNR | 22 hr |
| Feb 25, 11:43 AM MST | Winter Weather Advisory | UNR | 22 hr |
| Feb 26, 1:07 PM MST | Winter Weather Advisory | UNR | 26 hr |
| Mar 8, 3:21 AM MDT | Winter Storm Watch | UNR | 24 hr |
| Mar 9, 2:50 AM MDT | Winter Weather Advisory | CYS | 25 hr |
| Mar 9, 3:23 AM MDT | Winter Storm Warning | UNR | 33 hr |
| Mar 9, 8:49 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 21, 3:03 AM MDT | Blizzard Watch | UNR | 24 hr |
| Mar 21, 2:35 PM MDT | Winter Storm Watch | CYS | 15 hr |
| Mar 22, 3:30 AM MDT | Blizzard Warning | UNR | 65 hr |
| Mar 22, 6:03 AM MDT | Blizzard Warning | CYS | 48 hr |
| Mar 23, 3:59 AM MDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 23, 11:06 AM MDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 23, 1:50 PM MDT | Winter Weather Advisory | CYS | 27 hr |
| Mar 23, 5:56 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 28, 2:44 AM MDT | Winter Storm Watch | UNR | 24 hr |
| Mar 28, 5:01 AM MDT | Winter Storm Watch | CYS | 31 hr |
| Mar 29, 3:04 AM MDT | Blizzard Warning | UNR | 57 hr |
| Mar 29, 3:04 AM MDT | Winter Storm Warning | UNR | 51 hr |
| Mar 29, 5:24 AM MDT | Winter Weather Advisory | CYS | 41 hr |
| Mar 29, 11:57 AM MDT | Winter Storm Warning | CYS | 27 hr |
| Mar 30, 5:36 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 30, 8:09 PM MDT | Winter Weather Advisory | CYS | 3 hr |
| Apr 2, 4:06 AM MDT | Winter Storm Watch | UNR | 25 hr |
| Apr 2, 4:10 AM MDT | Winter Storm Watch | CYS | 33 hr |
| Apr 3, 4:00 AM MDT | Winter Storm Warning | CYS | 41 hr |
| Apr 3, 4:55 AM MDT | Winter Storm Warning | UNR | 41 hr |
| Apr 3, 4:55 AM MDT | Winter Weather Advisory | UNR | 27 hr |
| Apr 8, 2:36 PM MDT | Winter Weather Advisory | UNR | 25 hr |
| Apr 9, 3:07 PM MDT | Flood Watch | UNR | 72 hr |
| Apr 12, 9:22 AM MDT | Flood Watch | UNR | 4 days |
| Apr 16, 1:20 PM MDT | Flood Watch | UNR | 5 days |
| Apr 16, 3:02 PM MDT | Winter Weather Advisory | UNR | 12 hr |
| Apr 24, 8:40 AM MDT | Winter Weather Advisory | UNR | 3 hr |
| Apr 25, 3:47 AM MDT | Winter Weather Advisory | UNR | 35 hr |
| Apr 25, 1:46 PM MDT | Winter Storm Warning | UNR | 25 hr |
| Apr 28, 4:45 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 12, 1:51 PM MDT | Severe Thunderstorm Warning | UNR | 39 min |
| May 12, 2:34 PM MDT | Severe Thunderstorm Warning | UNR | 43 min |
| May 24, 5:53 PM MDT | Areal Flood Advisory | UNR | 5 hr |
| May 30, 5:26 PM MDT | Severe Thunderstorm Warning | UNR | 28 min |
| Jun 13, 5:21 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 14, 2:22 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 14, 2:55 PM MDT | Tornado Warning | UNR | 50 min |
| Jun 14, 3:40 PM MDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jun 14, 4:09 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 14, 4:12 PM MDT | Areal Flood Advisory | UNR | 6 hr |
| Jun 14, 4:49 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jun 14, 4:57 PM MDT | Tornado Warning | UNR | 48 min |
| Jun 14, 5:24 PM MDT | Tornado Warning | UNR | 51 min |
| Jun 14, 5:32 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Jun 14, 6:11 PM MDT | Severe Thunderstorm Warning | UNR | 49 min |
| Jun 14, 6:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 14, 9:40 PM MDT | Areal Flood Advisory | UNR | 20 hr |
| Jun 15, 3:48 AM MDT | Flood Watch | UNR | 24 hr |
| Jun 17, 2:16 PM MDT | Severe Thunderstorm Warning | UNR | 35 min |
| Jun 25, 3:49 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jun 30, 2:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 30, 3:19 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 3:28 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 1, 6:36 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jul 2, 11:25 AM MDT | Mesoscale Discussion | SPC | 65 min |
| Jul 2, 11:41 AM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 2, 2:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 2, 3:39 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jul 2, 4:34 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jul 2, 6:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 6, 4:40 PM MDT | Mesoscale Discussion | SPC | 35 min |
| Jul 6, 5:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 7:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 8, 1:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 8, 2:20 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 8, 4:22 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jul 8, 5:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jul 12, 4:02 AM MDT | Areal Flood Advisory | UNR | 3 hr |
| Jul 13, 12:34 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 13, 4:40 PM MDT | Severe Thunderstorm Warning | UNR | 65 min |
| Jul 13, 4:51 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jul 13, 5:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 13, 5:36 PM MDT | Severe Thunderstorm Warning | UNR | 84 min |
| Jul 13, 5:41 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jul 13, 6:12 PM MDT | Tornado Warning | UNR | 48 min |
| Jul 13, 6:27 PM MDT | Severe Thunderstorm Warning | UNR | 47 min |
| Jul 13, 6:45 PM MDT | Severe Thunderstorm Warning | UNR | 75 min |
| Aug 4, 3:37 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 4, 5:04 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Aug 4, 5:19 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Aug 4, 5:54 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Aug 4, 6:40 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Aug 4, 6:58 PM MDT | Severe Thunderstorm Warning | UNR | 77 min |
| Aug 5, 7:56 PM MDT | Severe Thunderstorm Warning | UNR | 49 min |
| Aug 5, 8:31 PM MDT | Severe Thunderstorm Warning | UNR | 33 min |
| Aug 6, 6:25 AM MDT | Severe Thunderstorm Warning | UNR | 34 min |
| Aug 6, 11:00 AM MDT | Flash Flood Watch | UNR | 9 hr |
| Aug 7, 11:50 AM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 7, 2:38 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 7, 5:55 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Aug 7, 8:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Aug 8, 12:36 AM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Aug 8, 1:25 AM MDT | Severe Thunderstorm Warning | UNR | 25 min |
| Aug 8, 2:09 AM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Aug 8, 2:18 AM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 8, 6:28 PM MDT | Severe Thunderstorm Warning | UNR | 52 min |
| Sep 21, 8:05 PM MDT | Frost Advisory | UNR | 7 hr |
| Sep 27, 3:13 AM MDT | Freeze Watch | CYS | 12 hr |
| Sep 27, 2:34 PM MDT | Frost Advisory | UNR | 17 hr |
| Sep 27, 2:45 PM MDT | Freeze Warning | CYS | 17 hr |
| Sep 30, 3:26 AM MDT | Winter Storm Watch | UNR | 12 hr |
| Sep 30, 5:18 AM MDT | High Wind Watch | CYS | 22 hr |
| Sep 30, 3:04 PM MDT | Winter Storm Warning | UNR | 12 hr |
| Sep 30, 3:04 PM MDT | Winter Weather Advisory | UNR | 24 hr |
| Oct 2, 3:46 AM MDT | Freeze Warning | UNR | 29 hr |
| Oct 3, 3:18 PM MDT | Winter Storm Watch | UNR | 24 hr |
| Oct 4, 3:17 PM MDT | Winter Weather Advisory | UNR | 19 hr |
| Oct 7, 3:37 AM MDT | Winter Weather Advisory | UNR | 24 hr |
| Oct 24, 8:47 PM MDT | Winter Weather Advisory | UNR | 18 hr |
| Oct 27, 3:16 PM MDT | Winter Storm Watch | UNR | 13 hr |
| Oct 28, 4:32 AM MDT | Winter Storm Warning | UNR | 46 hr |
| Oct 28, 4:32 AM MDT | Winter Weather Advisory | UNR | 46 hr |
| Dec 8, 2:33 PM MST | Wind Chill Advisory | UNR | 21 hr |
| Dec 9, 2:55 PM MST | Wind Chill Advisory | UNR | 13 hr |
| Dec 21, 1:28 PM MST | Winter Storm Watch | UNR | 39 hr |
| Dec 22, 4:23 AM MST | Winter Storm Warning | UNR | 5 days |
| Dec 22, 12:36 PM MST | Winter Weather Advisory | UNR | 4 days |
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 | 29 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 24 |
| Flooding | |
| Flash Flood Watch | 1 |
| Flood Watch | 4 |
| Areal Flood Advisory | 4 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 9 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 11 |
| Winter Weather Advisory | 23 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Watch | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.