Weather Alerts For Fort Collins, CO

# HEADLINE -------------------- WINTER STORM WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY AFTERNOON # DETAILS -------------------- WHAT Heavy snow possible. Total snow accumulations between 3 and 9 inches expected, heaviest on colder surfaces and west of I-25. WHERE Fort Collins, Boulder and the western suburbs of Denver, Denver, and Castle Rock. WHEN From Tuesday evening through Wednesday afternoon. Heaviest Tuesday night into Wednesday morning. IMPACTS Heavy wet snow will accumulate on tree branches and powerlines, possibly causing them to break and lead to power outages. Despite lesser accumulations on roadways, slick and hazardous conditions are still possible for the Wednesday morning commute. ISSUED AT Monday, May 4, 2026 at 12:51 AM MDT ISSUED BY National Weather Service Denver CO HEADER URGENT - WINTER WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Monitor the latest forecasts for updates on this approaching storm. # AREAS AFFECTED -------------------- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County, Elbert/Central and East Douglas Counties Above 6000 Feet, Larimer County Below 6000 Feet/Northwest Weld County, North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County Including the cities of Fondis, Brighton, Hereford, Highlands Ranch, Denver International Airport, Fort Collins, Larkspur, Lakewood, Castle Rock, Loveland, Boulder, Nunn, Littleton, Golden, Elbert, Aurora, Arvada, City of Denver, Longmont, Parker, and Kiowa

Pollen Index: 9.4 Pollen Level: medium-high Predominant Pollen: Cedar/Juniper, Maple and Elm. Concentration of pollen grains in the air for Tuesday will be falling into the very low range. This forecast of lower pollen concentration is based on rising humidity, weakening winds and expected precipitation in the morning, afternoon and evening which tends to wash pollen out of the air.