Alert archive / Colorado / Boulder County / Red Flag Warnings
Red Flag Warnings in Boulder County, Colorado, 2021
8 red flag warnings in 2021. An alert counts here when it covered this county. The archive of red flag warnings reaches back to 2005.
Boulder County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Red Flag Warnings
- 8
- Busiest month
- December4 red flag warnings
- Busiest day
- September 15, 20211 red flag warnings
Over time
By month
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 |
|---|---|---|---|
| Sep 15, 2:31 PM MDT | Red Flag Warning | BOU | 28 hr |
| Nov 15, 1:21 PM MST | Red Flag Warning | BOU | 28 hr |
| Nov 17, 2:16 PM MST | Red Flag Warning | BOU | 39 hr |
| Nov 22, 2:40 PM MST | Red Flag Warning | BOU | 26 hr |
| Dec 5, 3:21 AM MST | Red Flag Warning | BOU | 12 hr |
| Dec 14, 12:17 PM MST | Red Flag Warning | BOU | 29 hr |
| Dec 20, 1:08 PM MST | Red Flag Warning | BOU | 28 hr |
| Dec 22, 3:11 AM MST | Red Flag Warning | BOU | 14 hr |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.