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Red Flag Warning

Larimer County Below 6000 Feet/Northwest Weld County; Northeast Weld County

Red Flag Warning issued March 19 at 1:57PM MDT until March 20 at 7:00PM MDT by NWS Denver CO

Alert Description

A prolonged period of record warmth and very low humidity will bring elevated to critical fire weather conditions for much of northeast and north central Colorado through Saturday. The most widespread critical conditions are expected to develop Saturday afternoon and hold into Saturday evening. 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 Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 238 and 242. * TIMING...For the first Red Flag Warning, until 7 PM MDT this evening. For the second Red Flag Warning, from 11 AM to 7 PM MDT Friday. For the Fire Weather Watch, from Saturday morning through Saturday evening. * WINDS...West 10 to 20 mph with gusts up to 35 mph, with the strongest winds on Saturday. * RELATIVE HUMIDITY...As low as 6 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.

Safety Instructions

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. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.

Time Information

Effective
Mar 20, 2026, 5:00 PM
Expires
Mar 20, 2026, 4:00 AM
Issued
Mar 19, 2026, 7:57 PM

Alert Details

Severity
Severe
Urgency
Expected
Certainty
Likely
Category
Met

Issued By

NWS Denver CO
National Weather Service

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