Red Flag Warning in Boulder County, Colorado

Issued by the National Weather Service and archived by Claims Pages
EXPIRED 4/21/2026 11:53:00 PM (UTC) Urgency: Expected Severity: Severe Certainty: Likely
4/21/2026 11:53:00 PM until 4/22/2026 3:00:00 PM
* 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 Red Flag Warning, from 10 AM Wednesday to midnight MDT Wednesday night. For the Fire Weather Watch, from Thursday morning through Thursday evening. * WINDS...For the Red Flag Warning, west 20 to 30 mph with gusts up to 45 mph. For the Fire Weather Watch, northwest winds gusting up to 50 mph. * RELATIVE HUMIDITY...For the Red Flag Warning, 5 to 8 percent. For the Fire Weather Watch, 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.
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