Red Flag Warning in Boulder County, Colorado
Issued by the National Weather Service and archived by Claims Pages
EXPIRED
4/22/2026 12:22:00 PM (UTC)
Urgency: Expected
Severity: Severe
Certainty: Likely
4/22/2026 12:22:00 PM until 4/22/2026 8:30:00 PM
RED FLAG WARNING IN EFFECT FROM 11 AM TO 7 PM MDT THURSDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE
FOOTHILLS, URBAN CORRIDOR, PLAINS, AND SOUTH PARK...
The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 11 AM to 7 PM MDT Thursday. The Fire Weather Watch is no
longer in effect.
* AFFECTED AREA...Fire Weather Zones 214, 216, 238, 239, 240,
241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251.
* TIMING...For the first Red Flag Warning, until midnight MDT
tonight. For the second Red Flag Warning, from 11 AM to 7 PM
MDT Thursday.
* WINDS...West 20 to 30 mph with gusts up to 45 mph. For the
second Red Flag Warning, northwest winds gusting up to 50 mph.
* RELATIVE HUMIDITY...As low as 6 percent. For the second Red Flag
Warning, as low as 10 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.




