Alert archive / Colorado / 2011
Weather alerts in Colorado, September 2011
53 weather alerts in September 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in September 2011. Tap one for its archive.
- Alerts
- 53
- Warnings
- 26
- Watches
- 0
- Advisories
- 18
- Busiest day
- September 17, 201112 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 5:04 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 26 min |
| Sep 2, 5:10 PM MDT | Areal Flood Advisory | BOU | Adams, Arapahoe, Denver | 65 min |
| Sep 5, 8:21 PM MDT | Special Weather Statement | GJT | Mesa | 54 min |
| Sep 6, 6:06 PM MDT | Areal Flood Advisory | GJT | Garfield, Rio Blanco | 3 hr |
| Sep 8, 5:37 PM MDT | Areal Flood Advisory | GJT | Rio Blanco | 2 hr |
| Sep 9, 4:08 PM MDT | Special Weather Statement | GJT | 37 min | |
| Sep 9, 4:56 PM MDT | Special Weather Statement | GJT | 49 min | |
| Sep 9, 8:40 PM MDT | Areal Flood Advisory | GJT | Mesa | 63 min |
| Sep 13, 3:06 PM MDT | Winter Weather Advisory | PUB | Alamosa, Chaffee, Costilla, Custer, El Paso, Fremont and 6 more | 38 hr |
| Sep 14, 5:00 AM MDT | Winter Weather Advisory | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 8 more | 24 hr |
| Sep 14, 2:53 PM MDT | Winter Weather Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 13 hr |
| Sep 14, 2:56 PM MDT | Areal Flood Advisory | PUB | El Paso | 102 min |
| Sep 14, 4:32 PM MDT | Flash Flood Warning | PUB | El Paso, Teller | 3 hr |
| Sep 14, 4:54 PM MDT | River Flood Warning | PUB | El Paso | 4 hr |
| Sep 14, 7:28 PM MDT | Flash Flood Warning | PUB | El Paso, Teller | 2 hr |
| Sep 14, 7:43 PM MDT | River Flood Warning | PUB | El Paso | 13 hr |
| Sep 14, 8:54 PM MDT | Areal Flood Advisory | BOU | Boulder | 3 hr |
| Sep 14, 9:28 PM MDT | Flash Flood Warning | PUB | El Paso, Teller | 3 hr |
| Sep 14, 10:07 PM MDT | River Flood Warning | PUB | Pueblo | 21 hr |
| Sep 14, 11:47 PM MDT | Areal Flood Advisory | BOU | Boulder | 3 hr |
| Sep 15, 12:26 AM MDT | Areal Flood Warning | PUB | El Paso | 3 hr |
| Sep 15, 2:26 AM MDT | River Flood Warning | PUB | Pueblo | 28 hr |
| Sep 15, 3:24 AM MDT | Areal Flood Advisory | PUB | El Paso | 100 min |
| Sep 15, 2:26 PM MDT | Special Weather Statement | GJT | Montezuma | 64 min |
| Sep 16, 1:03 AM MDT | Dense Fog Advisory | PUB | El Paso | 8 hr |
| Sep 16, 12:30 PM MDT | Mesoscale Discussion | SPC | Baca, Bent, Kiowa, Las Animas, Otero, Prowers | 60 min |
| Sep 16, 3:21 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 29 min |
| Sep 16, 9:41 PM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson | 5 hr |
| Sep 17, 7:39 AM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 2 hr |
| Sep 17, 8:50 AM MDT | Frost Advisory | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 23 hr |
| Sep 17, 11:03 AM MDT | Special Weather Statement | GJT | Montezuma | 42 min |
| Sep 17, 2:48 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 19 min |
| Sep 17, 3:49 PM MDT | Mesoscale Discussion | SPC | Kit Carson, Logan, Phillips, Sedgwick, Washington, Yuma | 56 min |
| Sep 17, 4:34 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson, Yuma | 17 min |
| Sep 17, 4:40 PM MDT | Special Weather Statement | BOU | Washington | 50 min |
| Sep 17, 4:50 PM MDT | Tornado Warning | GLD | Kit Carson | 40 min |
| Sep 17, 5:14 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson, Yuma | 46 min |
| Sep 17, 5:20 PM MDT | Tornado Warning | GLD | Kit Carson | 55 min |
| Sep 17, 5:46 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 17 min |
| Sep 17, 6:03 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 42 min |
| Sep 17, 6:13 PM MDT | Tornado Warning | GLD | Kit Carson | 32 min |
| Sep 17, 6:42 PM MDT | Special Weather Statement | GLD | Kit Carson | 63 min |
| Sep 17, 6:51 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 39 min |
| Sep 17, 7:07 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 68 min |
| Sep 17, 7:19 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 7 min |
| Sep 21, 2:15 PM MDT | Frost Advisory | PUB | Alamosa, Conejos, Costilla, El Paso, Rio Grande, Saguache | 18 hr |
| Sep 21, 3:00 PM MDT | Freeze Warning | GJT | Gunnison, Montrose | 17 hr |
| Sep 21, 4:00 PM MDT | Frost Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 16 hr |
| Sep 22, 1:45 PM MDT | Freeze Warning | GJT | Gunnison, Montrose | 19 hr |
| Sep 22, 3:02 PM MDT | Freeze Warning | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 18 hr |
| Sep 23, 3:12 PM MDT | Freeze Warning | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 17 hr |
| Sep 26, 10:45 AM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Elbert, Larimer, Lincoln, Morgan and 1 more | 8 hr |
| Sep 29, 3:10 PM MDT | Frost Advisory | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 17 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 | 10 |
| Tornado Warning | 3 |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 7 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| River Flood Warning | 4 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Weather Advisory | 3 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kit Carson County14
- El Paso County11
- Alamosa County6
- Costilla County6
- Saguache County6
- Conejos County5
- Rio Grande County5
- Adams County4
- Teller County4
- Boulder County4
- Cheyenne County4
- Yuma County4
- Washington County4
- Denver County3
- Arapahoe County3
- Pueblo County3
- Gunnison County3
- Montezuma County3
- Montrose County3
- Larimer County3
- Elbert County3
- Lincoln County3
- Mesa County2
- Garfield County2
- Rio Blanco County2
- Las Animas County2
- Jefferson County2
- Logan County2
- Phillips County2
- Sedgwick County2
- Morgan County2
- Weld County2
- Chaffee County1
- Custer County1
- Fremont County1
- Huerfano County1
- Lake County1
- Archuleta County1
- Delta County1
- Dolores County1
20 more counties
Nearby
Alerts in force nowTornadoes on recordThe 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. Rebuilt daily.