Alert archive / Colorado / Cheyenne County
Weather alerts in Cheyenne County, Colorado, 2009
160 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cheyenne County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 160
- Warnings
- 54
- Watches
- 28
- Advisories
- 37
- Busiest month
- July41 alerts
- Busiest day
- July 11, 20095 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 1 tornado warnings covering Cheyenne County in 2009 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 10 minutes after it went out.
Cheyenne County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 2 | 100% | 10 min |
| Severe thunderstorm warnings | 31 | 11 | 65% | 19 | 79% | 22 min |
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Goodland, KS: tornado warnings | 23 | 6 | 74% | 15 | 53% | 12 min |
| NWS Goodland, KS: severe thunderstorm warnings | 264 | 137 | 48% | 306 | 84% | 25 min |
| NWS Goodland, KS: flash flood warnings | 25 | 3 | 88% | 9 | 44% | 97 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 7, 7:06 AM MST | Wind Advisory | GLD | 11 hr |
| Jan 9, 3:05 AM MST | Wind Advisory | GLD | 14 hr |
| Jan 11, 10:33 AM MST | Wind Advisory | GLD | 22 hr |
| Jan 12, 9:00 AM MST | High Wind Warning | GLD | 8 hr |
| Jan 17, 9:37 AM MST | Wind Advisory | GLD | 5 hr |
| Jan 18, 2:10 AM MST | Fire Weather Watch | GLD | 12 hr |
| Jan 18, 2:10 AM MST | Red Flag Warning | GLD | 15 hr |
| Jan 18, 2:10 PM MST | Red Flag Warning | GLD | 27 hr |
| Jan 18, 2:14 PM MST | Wind Advisory | GLD | 27 hr |
| Feb 5, 2:28 PM MST | Fire Weather Watch | GLD | 5 hr |
| Feb 5, 7:50 PM MST | Red Flag Warning | GLD | 21 hr |
| Feb 6, 9:30 AM MST | Wind Advisory | GLD | 8 hr |
| Feb 9, 12:58 AM MST | Wind Advisory | GLD | 16 hr |
| Feb 16, 10:30 AM MST | Red Flag Warning | GLD | 31 hr |
| Feb 17, 9:15 AM MST | Wind Advisory | GLD | 8 hr |
| Mar 3, 3:22 AM MST | Fire Weather Watch | GLD | 24 hr |
| Mar 3, 3:22 AM MST | Fire Weather Watch | GLD | 49 hr |
| Mar 4, 3:09 AM MST | Red Flag Warning | GLD | 15 hr |
| Mar 4, 3:09 AM MST | Red Flag Warning | GLD | 39 hr |
| Mar 5, 4:07 AM MST | Fire Weather Watch | GLD | 22 hr |
| Mar 5, 9:58 AM MST | Wind Advisory | GLD | 7 hr |
| Mar 6, 1:54 AM MST | Red Flag Warning | GLD | 17 hr |
| Mar 21, 2:38 AM MDT | Dense Fog Advisory | GLD | 7 hr |
| Mar 22, 12:05 PM MDT | Wind Advisory | GLD | 32 hr |
| Mar 23, 12:24 PM MDT | Wind Advisory | GLD | 30 hr |
| Mar 24, 5:13 AM MDT | High Wind Warning | GLD | 13 hr |
| Mar 25, 3:10 AM MDT | Winter Storm Watch | GLD | 23 hr |
| Mar 26, 2:08 AM MDT | Blizzard Warning | GLD | 32 hr |
| Mar 27, 1:55 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 27, 9:40 AM MDT | Winter Weather Advisory | GLD | 6 hr |
| Mar 29, 1:22 PM MDT | Wind Advisory | GLD | 35 hr |
| Apr 3, 2:10 AM MDT | Winter Weather Advisory | GLD | 38 hr |
| Apr 3, 2:59 PM MDT | Wind Advisory | GLD | 48 hr |
| Apr 14, 3:15 AM MDT | Wind Advisory | GLD | 41 hr |
| Apr 15, 3:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Apr 15, 4:17 PM MDT | Severe Thunderstorm Warning | GLD | 43 min |
| Apr 15, 4:35 PM MDT | Severe Thunderstorm Warning | GLD | 23 min |
| Apr 16, 1:10 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Apr 16, 2:22 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 16, 5:01 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Apr 17, 11:49 AM MDT | Mesoscale Discussion | SPC | 86 min |
| Apr 17, 2:44 PM MDT | Dense Fog Advisory | GLD | 2 hr |
| Apr 23, 2:04 PM MDT | Red Flag Warning | GLD | 28 hr |
| Apr 28, 4:45 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 14, 12:21 PM MDT | Wind Advisory | GLD | 6 hr |
| May 19, 3:59 AM MDT | Wind Advisory | GLD | 16 hr |
| May 24, 5:59 AM MDT | Dense Fog Advisory | GLD | 3 hr |
| May 30, 3:35 PM MDT | Severe Thunderstorm Warning | GLD | 37 min |
| May 30, 4:18 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jun 1, 5:44 PM MDT | Severe Thunderstorm Warning | GLD | 46 min |
| Jun 1, 6:04 PM MDT | Severe Thunderstorm Warning | GLD | 41 min |
| Jun 1, 6:27 PM MDT | Severe Thunderstorm Warning | GLD | 63 min |
| Jun 4, 1:27 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 4, 5:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 7, 6:11 PM MDT | Severe Thunderstorm Warning | GLD | 51 min |
| Jun 10, 1:28 AM MDT | Severe Thunderstorm Warning | GLD | 62 min |
| Jun 12, 4:04 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 12, 5:50 PM MDT | Severe Thunderstorm Warning | GLD | 55 min |
| Jun 12, 6:43 PM MDT | Severe Thunderstorm Warning | GLD | 32 min |
| Jun 12, 6:56 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 13, 3:59 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 14, 12:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 14, 1:50 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 14, 4:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 15, 2:34 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 26, 2:38 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 5:22 PM MDT | Severe Thunderstorm Warning | GLD | 53 min |
| Jul 3, 1:58 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 3, 4:51 PM MDT | Severe Thunderstorm Warning | GLD | 54 min |
| Jul 3, 5:30 PM MDT | Severe Thunderstorm Warning | GLD | 45 min |
| Jul 3, 8:43 PM MDT | Mesoscale Discussion | SPC | 32 min |
| Jul 5, 6:15 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 6, 7:07 PM MDT | Mesoscale Discussion | SPC | 23 min |
| Jul 6, 8:06 PM MDT | Severe Thunderstorm Warning | GLD | 54 min |
| Jul 6, 8:55 PM MDT | Flash Flood Warning | GLD | 3 hr |
| Jul 10, 2:32 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 10, 11:31 PM MDT | Severe Thunderstorm Warning | GLD | 59 min |
| Jul 10, 11:51 PM MDT | Flash Flood Warning | GLD | 3 hr |
| Jul 11, 12:28 AM MDT | Mesoscale Discussion | SPC | 62 min |
| Jul 11, 3:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 11, 3:56 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 11, 7:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jul 11, 7:57 PM MDT | Severe Thunderstorm Warning | GLD | 63 min |
| Jul 11, 8:06 PM MDT | Flash Flood Warning | GLD | 3 hr |
| Jul 11, 8:55 PM MDT | Severe Thunderstorm Warning | GLD | 65 min |
| Jul 11, 9:25 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jul 12, 6:17 PM MDT | Severe Thunderstorm Warning | GLD | 43 min |
| Jul 17, 12:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 17, 12:59 PM MDT | Tornado Watch | SPC | 6 hr |
| Jul 17, 4:01 PM MDT | Severe Thunderstorm Warning | GLD | 59 min |
| Jul 17, 4:31 PM MDT | Severe Thunderstorm Warning | GLD | 37 min |
| Jul 17, 6:32 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 18, 2:12 AM MDT | Mesoscale Discussion | SPC | 93 min |
| Jul 18, 5:16 AM MDT | Severe Thunderstorm Warning | GLD | 45 min |
| Jul 19, 4:08 PM MDT | Severe Thunderstorm Warning | GLD | 67 min |
| Jul 20, 6:26 PM MDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 20, 7:06 PM MDT | Severe Thunderstorm Warning | GLD | 34 min |
| Jul 22, 1:55 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 22, 5:47 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 22, 6:44 PM MDT | Severe Thunderstorm Warning | GLD | 61 min |
| Jul 23, 1:25 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jul 23, 2:30 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 6:41 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jul 27, 5:57 PM MDT | Severe Thunderstorm Warning | GLD | 63 min |
| Jul 27, 6:34 PM MDT | Severe Thunderstorm Warning | GLD | 26 min |
| Jul 29, 6:26 PM MDT | Tornado Warning | GLD | 34 min |
| Jul 31, 1:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 4:16 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 5, 3:51 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Aug 5, 4:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 5, 7:26 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Aug 6, 5:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Aug 10, 1:29 AM MDT | Mesoscale Discussion | SPC | 61 min |
| Aug 10, 1:49 AM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 5:02 AM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 10, 4:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 10, 4:43 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 10, 7:14 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 16, 6:12 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Aug 17, 12:52 AM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 17, 1:09 AM MDT | Severe Thunderstorm Warning | GLD | 66 min |
| Aug 17, 3:51 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Aug 18, 3:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Aug 18, 4:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 18, 7:41 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Aug 24, 4:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Aug 25, 2:31 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 25, 11:32 PM MDT | Areal Flood Warning | GLD | 5 hr |
| Sep 3, 1:02 PM MDT | Severe Thunderstorm Warning | GLD | 58 min |
| Sep 3, 2:13 PM MDT | Severe Thunderstorm Warning | GLD | 27 min |
| Sep 5, 12:32 AM MDT | Dense Fog Advisory | GLD | 9 hr |
| Sep 8, 8:27 PM MDT | Severe Thunderstorm Warning | GLD | 63 min |
| Sep 8, 9:30 PM MDT | Severe Thunderstorm Warning | GLD | 60 min |
| Sep 30, 12:07 PM MDT | Wind Advisory | GLD | 7 hr |
| Sep 30, 3:21 PM MDT | Wind Advisory | GLD | 28 hr |
| Oct 1, 2:22 PM MDT | Freeze Warning | GLD | 18 hr |
| Oct 2, 12:03 PM MDT | Freeze Warning | GLD | 20 hr |
| Oct 8, 3:17 PM MDT | Freeze Warning | GLD | 16 hr |
| Oct 10, 2:33 AM MDT | Winter Weather Advisory | GLD | 22 hr |
| Oct 11, 1:40 PM MDT | Winter Weather Advisory | GLD | 19 hr |
| Oct 20, 2:51 PM MDT | Winter Storm Watch | GLD | 21 hr |
| Oct 21, 3:35 AM MDT | Winter Weather Advisory | GLD | 33 hr |
| Oct 28, 12:38 PM MDT | Winter Weather Advisory | GLD | 31 hr |
| Oct 29, 7:14 PM MDT | Winter Weather Advisory | GLD | 14 hr |
| Nov 14, 3:15 AM MST | Winter Storm Watch | GLD | 36 hr |
| Nov 14, 4:16 PM MST | Winter Storm Warning | GLD | 31 hr |
| Nov 15, 9:26 AM MST | Mesoscale Discussion | SPC | 4 hr |
| Nov 23, 2:42 AM MST | Wind Advisory | GLD | 13 hr |
| Dec 7, 3:30 AM MST | Winter Storm Warning | GLD | 41 hr |
| Dec 7, 11:00 AM MST | Winter Storm Watch | GLD | 8 hr |
| Dec 7, 6:57 PM MST | Winter Weather Advisory | GLD | 26 hr |
| Dec 8, 8:55 PM MST | Wind Chill Warning | GLD | 12 hr |
| Dec 9, 2:30 AM MST | Wind Chill Advisory | GLD | 7 hr |
| Dec 9, 2:13 PM MST | Wind Chill Advisory | GLD | 19 hr |
| Dec 21, 3:25 AM MST | Winter Storm Watch | GLD | 10 hr |
| Dec 21, 1:54 PM MST | Winter Storm Warning | GLD | 63 hr |
| Dec 23, 12:32 PM MST | Winter Weather Advisory | GLD | 28 hr |
| Dec 24, 8:54 PM MST | Wind Chill Advisory | GLD | 12 hr |
| Dec 24, 8:54 PM MST | Wind Advisory | GLD | 20 hr |
| Dec 25, 9:32 AM MST | Winter Weather Advisory | GLD | 31 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 | 31 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 14 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 41 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 10 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 20 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
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.