Flagstaff, Arizona – Strong thunderstorms are expected to develop over northern Arizona Tuesday, bringing dangerous summer driving conditions to Flagstaff and surrounding roads by afternoon.
According to the National Weather Service, showers and thunderstorms will begin forming near Flagstaff after 11 a.m. Tuesday, with storm chances increasing after 5 p.m. Winds could gust up to 20 mph, especially along U.S. Route 180 and I-40. The chance of precipitation is 40%, and residents should watch for sudden downpours, lightning, and brief localized flooding.
Drivers should avoid non-essential travel during storm activity and monitor road conditions closely. Flash flooding is possible in low-lying areas and washes. Lightning risk remains elevated Tuesday evening into early Wednesday, particularly during the post-storm transition period.
Rain chances taper slightly Tuesday night but resume on Wednesday afternoon with another round of potential thunderstorms. Wednesday night may bring isolated storms before calmer, drier weather returns briefly Thursday.
By Friday and into the weekend, another round of summer storms will likely move into Flagstaff. Expect thunderstorms Friday through Sunday, with the highest rain chances Saturday afternoon. Highs will stay in the low to mid-80s throughout the week, a slight dip from Monday’s peak near 93°F.
Five-Day Flagstaff Weather Outlook (July 15–20):
- Tuesday: Showers and thunderstorms likely after 11 a.m., high near 89°F. Wind gusts up to 20 mph.
- Wednesday: Afternoon and evening storms possible, high near 84°F.
- Thursday: Mostly sunny, high near 80°F.
- Friday: 30% chance of afternoon storms, high near 81°F.
- Saturday: 40% chance of storms, high near 82°F.
Stay weather-ready this week and check updates daily as storm timing may shift.
