Alert archive / Colorado / Boulder County / Red Flag Warnings

Red Flag Warnings in Boulder County, Colorado, 2020

21 red flag warnings in 2020. 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 2020. Tap one for its archive.

Red Flag Warnings
21
Busiest month
October10 red flag warnings
Busiest day
April 28, 20201 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.

IssuedProductOfficeLasted
Apr 28, 3:27 AM MDTRed Flag WarningBOU17 hr
May 6, 2:37 PM MDTRed Flag WarningBOU29 hr
Jul 7, 3:08 AM MDTRed Flag WarningBOU41 hr
Jul 9, 2:35 PM MDTRed Flag WarningBOU29 hr
Aug 13, 3:27 AM MDTRed Flag WarningBOU17 hr
Aug 18, 3:27 PM MDTRed Flag WarningBOU29 hr
Aug 20, 3:43 AM MDTRed Flag WarningBOU17 hr
Aug 29, 3:21 PM MDTRed Flag WarningBOU29 hr
Sep 4, 2:40 PM MDTRed Flag WarningBOU3 days
Sep 24, 4:06 AM MDTRed Flag WarningBOU40 hr
Sep 25, 12:45 PM MDTRed Flag WarningBOU31 hr
Oct 2, 4:02 AM MDTRed Flag WarningBOU16 hr
Oct 4, 4:01 AM MDTRed Flag WarningBOU38 hr
Oct 10, 3:44 AM MDTRed Flag WarningBOU40 hr
Oct 11, 2:48 PM MDTRed Flag WarningBOU27 hr
Oct 12, 3:02 PM MDTRed Flag WarningBOU27 hr
Oct 13, 1:54 PM MDTRed Flag WarningBOU28 hr
Oct 15, 3:24 PM MDTRed Flag WarningBOU51 hr
Oct 20, 3:35 PM MDTRed Flag WarningBOU36 hr
Oct 21, 3:32 PM MDTRed Flag WarningBOU27 hr
Oct 23, 3:37 AM MDTRed Flag WarningBOU39 hr

The busiest days

Days with the most alerts issued, by UTC date.

  1. April 28, 20201red flag warnings
  2. May 6, 20201red flag warnings
  3. July 7, 20201red flag warnings
  4. July 9, 20201red flag warnings
  5. August 13, 20201red flag warnings
  6. August 18, 20201red flag warnings
  7. August 20, 20201red flag warnings
  8. August 29, 20201red flag warnings
  9. September 4, 20201red flag warnings
  10. September 24, 20201red flag warnings

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20192021

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.