Alert archive / Colorado / Frost Advisories / 2011
Frost Advisories in Colorado, September 2011
4 frost advisories in September 2011. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of frost advisories reaches back to 2005.
Frost Advisories by county
Each county as a circle sized by its count in September 2011. Tap one for its archive.
- Frost Advisories
- 4
- Busiest day
- September 21, 20112 frost advisories
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 17, 8:50 AM MDT | Frost Advisory | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 23 hr |
| Sep 21, 2:15 PM MDT | Frost Advisory | PUB | Alamosa, Conejos, Costilla, El Paso, Rio Grande, Saguache | 18 hr |
| Sep 21, 4:00 PM MDT | Frost Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 16 hr |
| Sep 29, 3:10 PM MDT | Frost Advisory | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 17 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Alamosa County3
- Conejos County3
- Costilla County3
- Rio Grande County3
- Saguache County3
- El Paso County1
- Adams County1
- Arapahoe County1
- Boulder County1
- Broomfield County1
- Denver County1
- Douglas County1
- Elbert County1
- Jefferson County1
- Larimer County1
- Lincoln County1
- Logan County1
- Morgan County1
- Phillips County1
- Sedgwick County1
- Washington County1
- Weld County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.