Update: Red flag warning affecting Northern Colorado Tuesday – gusts up to 35 mph

Published Feb 24, 2026

An updated red flag warning was released by the National Weather Service on Monday at 11:47 p.m. valid for Tuesday between 10 a.m. and 5 p.m. for Larimer County below 6,000 feet/Northwest Weld County, Boulder/Jefferson counties below 6,000 feet/West Broomfield County, North Douglas County below 6,000 feet/Denver/West Adams and Arapahoe counties/East Broomfield County, Northeast Weld County and Central and South Weld County.

Expect winds to be west 15 to 25 mph with gusts up to 35 mph. Channels of stronger winds will be possible with gusts up to 45 mph and relative humidity as low as 11 percent.

“Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire,” explains the NWS.

What does a red flag warning mean?

A red flag warning implies that either extreme fire weather conditions are currently taking place or will occur shortly, according to the NWS. Warm temperatures, very low humidities, and stronger winds are expected to combine to produce an increased risk of fire to spread rapidly.

What should you do under a red flag warning?

A red flag warning demands vigilance and immediate readiness to respond to potential fires. The NWS provides these vital guidelines to minimize fire hazards and ensure your safety:

1. Secure burn barrels:

In areas where controlled burning is sanctioned, make certain that burn barrels sport a weighty metal cover, equipped with holes no larger than 3/4 of an inch.

2. Mindful handling of smoking materials:

Prudently discard cigarette butts and avoid flinging cigarettes or matches from a moving vehicle. These seemingly innocuous actions can kindle dry grass, potentially triggering a wildfire.

3. Properly extinguish outdoor fires:

To thwart accidental fires, diligently extinguish all outdoor fires. Suffocate them with an ample deluge of water and stir to ensure complete cooling. Submerge charcoal in water until it’s entirely devoid of heat. Never leave live charcoal unattended.

4. Never desert a blaze:

Refrain from leaving any fire unattended. Even minor parks or embers might be carried into leaves or grass, kindling a fire that can swiftly expand.

Understanding the gravity of a red flag warning and adhering to these precautions is pivotal in mitigating the risk of wildfires during these perilous conditions. Prioritize safety, stay well-informed, and act responsibly to safeguard lives and property.

Source: The National Weather Service