Grand Junction, Colo. – Storms will fire across western Colorado Friday afternoon, bringing gusty winds up to 40 mph, frequent lightning and the chance for localized downpours. The National Weather Service in Grand Junction warns of dangerous storm development over the mountains, with activity drifting into valleys through tonight. Near-record heat will continue ahead of the storms, pushing highs near 101 in Grand Junction.
According to forecasters, the greatest thunderstorm coverage arrives Saturday, mainly south of Interstate 70. Lightning, brief heavy rain and strong outflow winds will remain the main hazards. By Sunday, the risk for widespread heavy rainfall and potential flash flooding increases, especially near the San Juan Mountains where burn scars and steep terrain could heighten debris flow danger.
Travelers should be prepared for sudden weather shifts on mountain passes including Vail Pass and McClure Pass. Afternoon outdoor plans across Mesa, Delta and Montrose counties may be interrupted by quick-hitting storms. Officials advise avoiding flood-prone areas, staying clear of washes, and monitoring alerts if camping or hiking.
While storm chances stay elevated into midweek, relief arrives as cooler temperatures settle in by early next week.
Five Day Forecast for Grand Junction, CO
- Friday: Sunny, near 101. Slight chance of afternoon storms.
- Saturday: High 98. Afternoon storms possible, 30% chance.
- Sunday: High 93. Showers and storms likely, flash flood risk.
- Monday: High 88. Showers continue, cooler air moves in.
- Tuesday: High 86. Cloudy, showers likely.
