Weather Alerts For Boulder, CO

URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 149 AM MST Wed Dec 17 2025 Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County- Central and East Adams and Arapahoe Counties- 149 AM MST Wed Dec 17 2025 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE URBAN CORRIDOR... * AFFECTED AREA...Fire Weather Zones 238, 239, 240, 241, 242, 243 and 245. * TIMING...From 11 AM this morning to 6 PM MST this evening. * WINDS...West 30 to 50 mph with gusts up to 80 mph. * RELATIVE HUMIDITY...15 to 25 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. &&

URGENT - WEATHER MESSAGE National Weather Service Denver CO 135 AM MST Wed Dec 17 2025 Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Boulder, Arvada, Hereford, Longmont, Golden, Nunn, Lakewood, Fort Collins, and Loveland 135 AM MST Wed Dec 17 2025 ...HIGH WIND WARNING IN EFFECT FOR THIS AFTERNOON... * WHAT...West winds 30 to 50 mph with gusts 65 to 85 mph expected. * WHERE...Fort Collins, Longmont, Boulder, and the western suburbs of Denver. * WHEN...From 11 AM this morning to 7 PM MST this evening. * IMPACTS...Damaging winds may blow down trees and power lines. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles. Strong winds will lead to rapid fire growth of any new fire. PRECAUTIONARY/PREPAREDNESS ACTIONS... People are urged to secure loose objects that could be blown around or damaged by the wind. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Avoid outdoor burning or any activity that may cause sparks. The strong winds will fuel rapid fire growth. &&