Alert archive / Wyoming / Laramie County
Weather alerts in Laramie County, Wyoming, 2011
254 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Laramie County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 254
- Warnings
- 115
- Watches
- 51
- Advisories
- 40
- Busiest month
- July44 alerts
- Busiest day
- August 10, 201114 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 Laramie County in 2011 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Laramie County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 1 | 0% | |
| Severe thunderstorm warnings | 43 | 24 | 44% | 66 | 77% | 18 min |
| Flash flood warnings | 9 | 8 | 11% | 17 | 94% | 54 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Cheyenne, WY: tornado warnings | 34 | 11 | 68% | 18 | 83% | 12 min |
| NWS Cheyenne, WY: severe thunderstorm warnings | 197 | 99 | 50% | 282 | 73% | 20 min |
| NWS Cheyenne, WY: flash flood warnings | 25 | 18 | 28% | 50 | 90% | 81 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, 8:57 PM MST | Wind Chill Warning | CYS | 13 hr |
| Jan 1, 3:50 AM MST | Wind Chill Advisory | CYS | 7 hr |
| Jan 1, 3:59 AM MST | High Wind Watch | CYS | 6 hr |
| Jan 1, 10:27 AM MST | High Wind Warning | CYS | 26 hr |
| Jan 3, 12:36 PM MST | High Wind Watch | CYS | 15 hr |
| Jan 4, 3:24 AM MST | High Wind Warning | CYS | 60 hr |
| Jan 5, 3:47 AM MST | High Wind Watch | CYS | 13 hr |
| Jan 7, 8:30 PM MST | Winter Storm Watch | CYS | 18 hr |
| Jan 8, 2:59 PM MST | Winter Weather Advisory | CYS | 32 hr |
| Jan 9, 6:34 PM MST | Wind Chill Advisory | CYS | 9 hr |
| Jan 10, 3:02 PM MST | Wind Chill Warning | CYS | 18 hr |
| Jan 10, 3:02 PM MST | Wind Chill Advisory | CYS | 18 hr |
| Jan 12, 2:43 AM MST | High Wind Watch | CYS | 12 hr |
| Jan 12, 9:34 AM MST | High Wind Warning | CYS | 25 hr |
| Jan 14, 11:38 PM MST | High Wind Warning | CYS | 11 hr |
| Jan 15, 3:45 AM MST | High Wind Watch | CYS | 11 hr |
| Jan 15, 2:46 PM MST | High Wind Warning | CYS | 43 hr |
| Jan 19, 3:00 PM MST | High Wind Watch | CYS | 11 hr |
| Jan 20, 2:15 AM MST | High Wind Warning | CYS | 30 hr |
| Jan 21, 9:45 AM MST | High Wind Watch | CYS | 4 hr |
| Jan 21, 1:43 PM MST | High Wind Warning | CYS | 18 hr |
| Jan 23, 8:08 AM MST | High Wind Warning | CYS | 13 hr |
| Jan 24, 9:00 PM MST | High Wind Warning | CYS | 11 hr |
| Jan 26, 6:11 PM MST | High Wind Warning | CYS | 14 hr |
| Jan 27, 10:43 AM MST | High Wind Warning | CYS | 21 hr |
| Jan 30, 2:38 PM MST | Wind Chill Watch | CYS | 14 hr |
| Jan 30, 2:38 PM MST | Winter Weather Advisory | CYS | 23 hr |
| Jan 31, 4:08 AM MST | Wind Chill Warning | CYS | 54 hr |
| Feb 2, 2:30 PM MST | Wind Chill Advisory | CYS | 16 hr |
| Feb 3, 12:32 AM MST | High Wind Warning | CYS | 8 hr |
| Feb 3, 3:13 PM MST | High Wind Warning | CYS | 15 hr |
| Feb 4, 8:43 PM MST | High Wind Warning | CYS | 8 hr |
| Feb 6, 3:10 AM MST | Winter Storm Warning | CYS | 55 hr |
| Feb 6, 9:12 AM MST | High Wind Watch | CYS | 3 hr |
| Feb 6, 12:29 PM MST | High Wind Warning | CYS | 26 hr |
| Feb 7, 4:45 AM MST | Winter Weather Advisory | CYS | 33 hr |
| Feb 8, 2:57 PM MST | Wind Chill Warning | CYS | 19 hr |
| Feb 9, 10:27 AM MST | High Wind Warning | CYS | 43 hr |
| Feb 9, 2:46 PM MST | Wind Chill Advisory | CYS | 17 hr |
| Feb 10, 2:54 AM MST | High Wind Warning | CYS | 26 hr |
| Feb 11, 5:01 AM MST | High Wind Watch | CYS | 5 hr |
| Feb 11, 10:03 AM MST | High Wind Warning | CYS | 56 hr |
| Feb 12, 4:39 AM MST | High Wind Watch | CYS | 6 hr |
| Feb 14, 3:22 AM MST | High Wind Watch | CYS | 8 hr |
| Feb 14, 11:15 AM MST | High Wind Warning | CYS | 23 hr |
| Feb 16, 1:01 AM MST | High Wind Warning | CYS | 40 hr |
| Feb 19, 2:31 PM MST | Winter Weather Advisory | CYS | 26 hr |
| Feb 20, 6:34 AM MST | High Wind Warning | CYS | 68 hr |
| Feb 24, 3:28 AM MST | Winter Storm Warning | CYS | 41 hr |
| Feb 24, 3:28 AM MST | Winter Weather Advisory | CYS | 51 hr |
| Feb 25, 8:07 PM MST | Dense Fog Advisory | CYS | 7 hr |
| Feb 26, 12:03 PM MST | High Wind Warning | CYS | 5 hr |
| Feb 27, 2:51 AM MST | High Wind Watch | CYS | 10 hr |
| Feb 27, 12:28 PM MST | High Wind Warning | CYS | 40 hr |
| Mar 5, 3:47 PM MST | Winter Storm Watch | CYS | 11 hr |
| Mar 6, 2:32 AM MST | Winter Weather Advisory | CYS | 27 hr |
| Mar 9, 2:12 PM MST | High Wind Warning | CYS | 50 hr |
| Mar 10, 12:49 AM MST | High Wind Watch | CYS | 3 hr |
| Mar 15, 12:33 PM MDT | High Wind Warning | CYS | 26 hr |
| Mar 16, 3:47 PM MDT | High Wind Warning | CYS | 3 hr |
| Mar 17, 2:33 AM MDT | High Wind Warning | CYS | 12 hr |
| Mar 17, 3:39 PM MDT | Winter Weather Advisory | CYS | 11 hr |
| Mar 18, 6:03 PM MDT | High Wind Watch | CYS | 21 hr |
| Mar 19, 2:45 PM MDT | High Wind Warning | CYS | 19 hr |
| Mar 21, 4:21 AM MDT | High Wind Watch | CYS | 11 hr |
| Mar 21, 3:11 PM MDT | High Wind Warning | CYS | 37 hr |
| Mar 23, 8:34 AM MDT | High Wind Warning | CYS | 5 hr |
| Mar 24, 9:26 AM MDT | High Wind Watch | CYS | 10 hr |
| Mar 29, 2:39 PM MDT | High Wind Watch | CYS | 14 hr |
| Mar 30, 5:00 AM MDT | High Wind Watch | CYS | 22 hr |
| Mar 30, 5:00 AM MDT | High Wind Warning | CYS | 39 hr |
| Apr 1, 2:53 PM MDT | High Wind Watch | CYS | 9 hr |
| Apr 1, 11:26 PM MDT | High Wind Warning | CYS | 27 hr |
| Apr 3, 2:41 PM MDT | High Wind Watch | CYS | 22 hr |
| Apr 4, 2:29 AM MDT | High Wind Warning | CYS | 43 hr |
| Apr 7, 1:18 AM MDT | Dense Fog Advisory | CYS | 5 hr |
| Apr 8, 12:55 AM MDT | Dense Fog Advisory | CYS | 8 hr |
| Apr 9, 8:04 AM MDT | Dense Fog Advisory | CYS | 69 min |
| Apr 14, 10:23 AM MDT | Winter Weather Advisory | CYS | 11 hr |
| Apr 17, 6:19 AM MDT | High Wind Warning | CYS | 8 hr |
| Apr 18, 3:09 PM MDT | Dense Fog Advisory | CYS | 18 hr |
| Apr 20, 2:37 PM MDT | High Wind Watch | CYS | 19 hr |
| Apr 21, 9:40 AM MDT | High Wind Warning | CYS | 34 hr |
| May 11, 8:12 AM MDT | Winter Weather Advisory | CYS | 28 hr |
| May 14, 9:30 PM MDT | Dense Fog Advisory | CYS | 38 hr |
| May 18, 3:12 AM MDT | Flash Flood Watch | CYS | 24 hr |
| May 18, 4:04 PM MDT | Winter Weather Advisory | CYS | 19 hr |
| May 19, 6:14 AM MDT | Winter Storm Warning | CYS | 5 hr |
| May 23, 4:06 PM MDT | Areal Flood Advisory | CYS | 3 hr |
| May 26, 4:34 AM MDT | Dense Fog Advisory | CYS | 6 hr |
| May 28, 10:07 PM MDT | Dense Fog Advisory | CYS | 15 hr |
| May 29, 4:38 AM MDT | High Wind Watch | CYS | 23 hr |
| May 29, 4:48 PM MDT | Dense Fog Advisory | CYS | 16 hr |
| May 30, 3:13 AM MDT | High Wind Warning | CYS | 17 hr |
| Jun 2, 11:50 AM MDT | High Wind Warning | CYS | 6 hr |
| Jun 6, 8:00 PM MDT | Severe Thunderstorm Warning | CYS | 30 min |
| Jun 8, 2:51 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 9, 7:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jun 11, 3:35 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 4:50 PM MDT | Severe Thunderstorm Warning | CYS | 20 min |
| Jun 11, 5:23 PM MDT | Severe Thunderstorm Warning | CYS | 37 min |
| Jun 11, 6:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jun 13, 1:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 7:24 PM MDT | Severe Thunderstorm Warning | CYS | 36 min |
| Jun 16, 12:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jun 16, 1:34 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jun 16, 1:55 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 16, 1:59 PM MDT | Severe Thunderstorm Warning | CYS | 46 min |
| Jun 16, 2:51 PM MDT | Severe Thunderstorm Warning | CYS | 54 min |
| Jun 16, 3:23 PM MDT | Flash Flood Warning | CYS | 12 hr |
| Jun 16, 4:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 16, 6:27 PM MDT | Severe Thunderstorm Warning | CYS | 48 min |
| Jun 16, 7:26 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 17, 3:32 AM MDT | Areal Flood Warning | CYS | 8 hr |
| Jun 19, 3:03 PM MDT | Severe Thunderstorm Warning | CYS | 42 min |
| Jun 19, 3:11 PM MDT | Flash Flood Warning | CYS | 5 hr |
| Jun 19, 3:43 PM MDT | Severe Thunderstorm Warning | CYS | 33 min |
| Jun 23, 6:58 PM MDT | Severe Thunderstorm Warning | CYS | 38 min |
| Jun 23, 7:34 PM MDT | Severe Thunderstorm Warning | CYS | 26 min |
| Jun 24, 1:25 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 24, 1:32 PM MDT | Severe Thunderstorm Warning | CYS | 43 min |
| Jun 24, 1:52 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 1:53 PM MDT | Severe Thunderstorm Warning | CYS | 52 min |
| Jun 25, 1:24 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jun 29, 6:57 PM MDT | Severe Thunderstorm Warning | CYS | 37 min |
| Jun 30, 11:57 AM MDT | Mesoscale Discussion | SPC | 63 min |
| Jun 30, 12:18 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 30, 1:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 30, 3:19 PM MDT | Severe Thunderstorm Warning | CYS | 41 min |
| Jun 30, 3:58 PM MDT | Severe Thunderstorm Warning | CYS | 47 min |
| Jun 30, 4:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 30, 7:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 2:43 PM MDT | Severe Thunderstorm Warning | CYS | 47 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, 3:15 PM MDT | Severe Thunderstorm Warning | CYS | 25 min |
| Jul 4, 4:27 PM MDT | Severe Thunderstorm Warning | CYS | 29 min |
| Jul 5, 3:19 AM MDT | Flash Flood Watch | CYS | 19 hr |
| Jul 6, 2:28 PM MDT | Severe Thunderstorm Warning | CYS | 62 min |
| Jul 6, 2:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 12, 12:07 PM MDT | Flash Flood Watch | CYS | 18 hr |
| Jul 12, 5:27 PM MDT | Severe Thunderstorm Warning | CYS | 63 min |
| Jul 12, 5:36 PM MDT | Flash Flood Warning | CYS | 3 hr |
| Jul 12, 5:53 PM MDT | Severe Thunderstorm Warning | CYS | 67 min |
| Jul 12, 6:03 PM MDT | Tornado Warning | CYS | 30 min |
| Jul 12, 6:03 PM MDT | Tornado Warning | CYS | 27 min |
| Jul 12, 6:56 PM MDT | Severe Thunderstorm Warning | CYS | 45 min |
| Jul 12, 7:09 PM MDT | Flash Flood Warning | CYS | 8 hr |
| Jul 12, 7:46 PM MDT | Severe Thunderstorm Warning | CYS | 32 min |
| Jul 12, 10:26 PM MDT | Flash Flood Warning | CYS | 4 hr |
| Jul 13, 2:23 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 8:57 PM MDT | Severe Thunderstorm Warning | CYS | 48 min |
| Jul 13, 9:49 PM MDT | Severe Thunderstorm Warning | CYS | 41 min |
| Jul 14, 4:04 AM MDT | Flash Flood Watch | CYS | 21 hr |
| Jul 14, 1:14 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 2:43 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 14, 4:03 PM MDT | Severe Thunderstorm Warning | CYS | 42 min |
| Jul 14, 4:35 PM MDT | Areal Flood Advisory | CYS | 4 hr |
| Jul 14, 4:44 PM MDT | Severe Thunderstorm Warning | CYS | 46 min |
| Jul 14, 5:08 PM MDT | Severe Thunderstorm Warning | CYS | 23 min |
| Jul 14, 5:29 PM MDT | Severe Thunderstorm Warning | CYS | 46 min |
| Jul 14, 6:28 PM MDT | Areal Flood Advisory | CYS | 4 hr |
| Jul 14, 6:50 PM MDT | Severe Thunderstorm Warning | CYS | 34 min |
| Jul 14, 7:10 PM MDT | Flash Flood Warning | CYS | 2 hr |
| Jul 14, 8:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 16, 3:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 16, 9:53 PM MDT | Severe Thunderstorm Warning | CYS | 58 min |
| Jul 24, 2:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 24, 3:16 PM MDT | Severe Thunderstorm Warning | CYS | 41 min |
| Jul 24, 3:55 PM MDT | Severe Thunderstorm Warning | CYS | 65 min |
| Jul 24, 4:51 PM MDT | Severe Thunderstorm Warning | CYS | 32 min |
| Jul 24, 5:49 PM MDT | Severe Thunderstorm Warning | CYS | 56 min |
| Jul 24, 5:52 PM MDT | Flash Flood Warning | CYS | 3 hr |
| Jul 25, 1:32 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 29, 12:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 3, 1:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 3, 3:08 PM MDT | Flash Flood Warning | CYS | 3 hr |
| Aug 4, 4:07 PM MDT | Severe Thunderstorm Warning | CYS | 22 min |
| Aug 4, 5:18 PM MDT | Flash Flood Warning | CYS | 3 hr |
| Aug 9, 1:51 PM MDT | Tornado Watch | SPC | 7 hr |
| Aug 9, 5:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 9, 6:54 PM MDT | Severe Thunderstorm Warning | CYS | 66 min |
| Aug 9, 7:18 PM MDT | Tornado Warning | CYS | 42 min |
| Aug 9, 7:54 PM MDT | Severe Thunderstorm Warning | CYS | 66 min |
| Aug 9, 8:26 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Aug 9, 8:51 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 9, 9:11 PM MDT | Special Weather Statement | CYS | 64 min |
| Aug 9, 9:31 PM MDT | Severe Thunderstorm Warning | CYS | 59 min |
| Aug 10, 1:25 AM MDT | Dense Fog Advisory | CYS | 5 hr |
| Aug 10, 3:19 PM MDT | Special Weather Statement | CYS | 56 min |
| Aug 10, 3:31 PM MDT | Severe Thunderstorm Warning | CYS | 48 min |
| Aug 10, 3:38 PM MDT | Tornado Warning | CYS | 37 min |
| Aug 10, 3:42 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Aug 10, 4:33 PM MDT | Special Weather Statement | CYS | 57 min |
| Aug 10, 5:46 PM MDT | Special Weather Statement | CYS | 59 min |
| Aug 15, 4:50 PM MDT | Special Weather Statement | CYS | 40 min |
| Aug 16, 3:57 PM MDT | Special Weather Statement | CYS | 48 min |
| Aug 16, 4:31 PM MDT | Severe Thunderstorm Warning | CYS | 44 min |
| Aug 19, 4:01 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Aug 20, 5:19 PM MDT | Special Weather Statement | CYS | 41 min |
| Aug 20, 5:43 PM MDT | Special Weather Statement | CYS | 47 min |
| Aug 20, 6:03 PM MDT | Special Weather Statement | CYS | 42 min |
| Aug 20, 6:51 PM MDT | Special Weather Statement | CYS | 39 min |
| Aug 21, 3:06 PM MDT | Special Weather Statement | CYS | 39 min |
| Aug 25, 3:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 28, 4:21 PM MDT | Special Weather Statement | CYS | 54 min |
| Aug 29, 1:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Aug 29, 1:49 PM MDT | Special Weather Statement | CYS | 56 min |
| Aug 29, 2:26 PM MDT | Special Weather Statement | CYS | 64 min |
| Aug 29, 2:48 PM MDT | Special Weather Statement | CYS | 57 min |
| Aug 29, 3:25 PM MDT | Severe Thunderstorm Warning | CYS | 65 min |
| Aug 31, 7:33 PM MDT | Special Weather Statement | CYS | 27 min |
| Aug 31, 7:45 PM MDT | Special Weather Statement | CYS | 60 min |
| Sep 3, 11:26 AM MDT | Frost Advisory | CYS | 21 hr |
| Sep 20, 7:51 PM MDT | Frost Advisory | CYS | 12 hr |
| Sep 21, 12:53 PM MDT | Frost Advisory | CYS | 19 hr |
| Oct 5, 9:50 PM MDT | High Wind Watch | CYS | 6 hr |
| Oct 6, 3:34 AM MDT | High Wind Warning | CYS | 35 hr |
| Oct 7, 3:04 PM MDT | Winter Weather Advisory | CYS | 36 hr |
| Oct 23, 2:35 PM MDT | Winter Storm Watch | CYS | 24 hr |
| Oct 24, 2:57 PM MDT | Winter Storm Warning | CYS | 45 hr |
| Oct 25, 5:56 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 28, 2:22 AM MDT | High Wind Watch | CYS | 8 hr |
| Oct 28, 10:12 AM MDT | High Wind Warning | CYS | 32 hr |
| Oct 31, 3:07 AM MDT | Winter Storm Watch | CYS | 12 hr |
| Oct 31, 2:52 PM MDT | Winter Storm Warning | CYS | 42 hr |
| Nov 4, 2:50 PM MDT | High Wind Watch | CYS | 11 hr |
| Nov 5, 2:06 AM MDT | High Wind Warning | CYS | 27 hr |
| Nov 7, 11:51 AM MST | Winter Weather Advisory | CYS | 3 hr |
| Nov 7, 9:39 PM MST | Dense Fog Advisory | CYS | 5 hr |
| Nov 10, 10:40 AM MST | High Wind Watch | CYS | 16 hr |
| Nov 11, 2:17 AM MST | High Wind Warning | CYS | 4 days |
| Nov 15, 1:41 PM MST | High Wind Watch | CYS | 14 hr |
| Nov 16, 3:12 AM MST | High Wind Warning | CYS | 50 hr |
| Nov 18, 3:23 PM MST | High Wind Watch | CYS | 4 hr |
| Nov 18, 7:46 PM MST | High Wind Warning | CYS | 8 hr |
| Nov 22, 11:58 AM MST | High Wind Warning | CYS | 10 hr |
| Nov 23, 1:50 PM MST | High Wind Watch | CYS | 25 hr |
| Nov 24, 2:50 PM MST | High Wind Warning | CYS | 30 hr |
| Nov 29, 3:43 AM MST | Winter Storm Watch | CYS | 24 hr |
| Nov 29, 7:48 PM MST | Winter Storm Warning | CYS | 39 hr |
| Nov 30, 3:31 AM MST | Winter Weather Advisory | CYS | 31 hr |
| Dec 1, 9:01 PM MST | Dense Fog Advisory | CYS | 116 min |
| Dec 2, 2:26 PM MST | Winter Weather Advisory | CYS | 18 hr |
| Dec 5, 2:33 AM MST | Wind Chill Advisory | CYS | 30 hr |
| Dec 19, 8:51 AM MST | Winter Weather Advisory | CYS | 3 hr |
| Dec 20, 2:42 PM MST | Winter Weather Advisory | CYS | 40 hr |
| Dec 24, 2:10 PM MST | High Wind Watch | CYS | 13 hr |
| Dec 25, 2:52 AM MST | High Wind Warning | CYS | 30 hr |
| Dec 26, 3:13 PM MST | High Wind Watch | CYS | 23 hr |
| Dec 27, 10:15 AM MST | High Wind Warning | CYS | 4 days |
| Dec 27, 2:29 PM MST | High Wind Watch | CYS | 19 hr |
| Dec 29, 8:59 PM MST | High Wind Watch | CYS | 15 hr |
| Dec 30, 11:29 AM MST | High Wind Warning | CYS | 29 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 | 43 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 31 |
| Special Weather Statement | 17 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 9 |
| Flash Flood Watch | 4 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 16 |
| Cold | |
| Wind Chill Warning | 4 |
| Wind Chill Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 6 |
| Wind and dust | |
| High Wind Warning | 48 |
| High Wind Watch | 33 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
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.