Grand Junction, Colo. – Sunshine dominates western Colorado Sunday into Monday, but the pattern shifts midweek as scattered thunderstorms develop along I-70 and surrounding valleys. Afternoon travel could be disrupted by brief heavy downpours and gusty winds.
According to the National Weather Service, Sunday will reach 87°F under mostly sunny skies, with only a 10 percent chance of storms late. Monday follows dry and hot near 89°F. By Tuesday, a disturbance moves into the Rockies, bringing a 20 to 30 percent chance of afternoon thunderstorms. Storm chances expand Wednesday through Friday, becoming more widespread before tapering into the weekend.
Hazardous Weather Outlooks for the region highlight risks of gusty outflow winds up to 50 mph, lightning, and brief heavy rainfall, especially over burn scars and canyon areas. These storms could quickly trigger localized flash flooding.
Drivers should be cautious along I-70, U.S. 50, and rural mountain routes where sudden downpours can reduce visibility. Outdoor enthusiasts in the Grand Mesa and Colorado National Monument should plan for rapid weather changes, as lightning remains a serious hazard in exposed terrain.
The NOAA long-range outlook suggests precipitation near seasonal norms, meaning scattered storms remain likely without a prolonged wet stretch. Still, each afternoon brings potential hazards across western Colorado.
More updates are expected as storm chances rise midweek.
Five-Day Forecast for Grand Junction, Colorado
- Monday: Sunny, high 89°F, calm winds
- Tuesday: 20% chance of storms after 2 p.m., high 88°F
- Wednesday: Scattered storms, high 85°F, breezy
- Thursday: Chance of storms, high 77°F, partly cloudy
- Friday: Showers and storms possible, high 81°F
