Colorado, Wyoming Red Flag Warning | Effective 04/20/2026 19:48

Headline: 
Red Flag Warning issued April 20 at 8:48PM MDT until April 23 at 12:00AM MDT by NWS Denver CO
Event: 
Red Flag Warning
Urgency: 
Expected
Effective: 
April 20, 2026 - 7:48pm
Expires: 
April 21, 2026 - 4:00am
Description: 
The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM Wednesday to midnight MDT Wednesday night. * AFFECTED AREA...Fire Weather Zone 215. * TIMING...From 10 AM Wednesday to midnight MDT Wednesday night. * WINDS...Southwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...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.
Instruction: 
A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
Area Description: 
Larimer and Boulder Counties Between 6000 and 9000 Feet
Forcast Office: 
NWS Denver CO