Alert archive / Colorado / Boulder County / Red Flag Warnings
Red Flag Warnings in Boulder County, Colorado, 2026
27 red flag warnings in 2026. 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 2026. Tap one for its archive.
- Red Flag Warnings
- 27
- Busiest month
- June8 red flag warnings
- Busiest day
- January 6, 20261 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 |
|---|---|---|---|
| Jan 6, 3:03 AM MST | Red Flag Warning | BOU | 14 hr |
| Jan 14, 1:47 PM MST | Red Flag Warning | BOU | 28 hr |
| Jan 15, 10:01 AM MST | Red Flag Warning | BOU | 32 hr |
| Feb 16, 12:13 PM MST | Red Flag Warning | BOU | 31 hr |
| Feb 23, 11:59 AM MST | Red Flag Warning | BOU | 29 hr |
| Feb 24, 11:57 AM MST | Red Flag Warning | BOU | 30 hr |
| Feb 26, 11:04 AM MST | Red Flag Warning | BOU | 31 hr |
| Mar 10, 2:26 AM MDT | Red Flag Warning | BOU | 11 hr |
| Mar 11, 1:22 PM MDT | Red Flag Warning | BOU | 32 hr |
| Mar 12, 12:50 PM MDT | Red Flag Warning | BOU | 31 hr |
| Mar 12, 8:58 PM MDT | Red Flag Warning | BOU | 48 hr |
| Mar 17, 1:09 PM MDT | Red Flag Warning | BOU | 30 hr |
| Mar 20, 12:46 PM MDT | Red Flag Warning | BOU | 33 hr |
| Mar 29, 12:19 PM MDT | Red Flag Warning | BOU | 32 hr |
| Apr 2, 12:57 PM MDT | Red Flag Warning | BOU | 30 hr |
| Apr 20, 8:48 PM MDT | Red Flag Warning | BOU | 51 hr |
| Apr 22, 12:22 PM MDT | Red Flag Warning | BOU | 31 hr |
| Apr 23, 1:41 PM MDT | Red Flag Warning | BOU | 30 hr |
| Jun 16, 11:38 AM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 19, 11:29 AM MDT | Red Flag Warning | BOU | 34 hr |
| Jun 22, 12:18 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 23, 12:05 PM MDT | Red Flag Warning | BOU | 30 hr |
| Jun 26, 12:24 AM MDT | Red Flag Warning | BOU | 48 hr |
| Jun 27, 1:11 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 28, 12:40 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 29, 12:48 PM MDT | Red Flag Warning | BOU | 32 hr |
| Aug 4, 12:20 PM MDT | Red Flag Warning | BOU | 31 hr |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.