Flagstaff, Ariz. – Midweek storms are set to make a disruptive return across northern Arizona, with lightning and heavy rain possible by Wednesday, September 3. Drivers on Interstate 40 and I-17 should prepare for slick pavement and sudden downpours that could slow morning and evening commutes.
According to the National Weather Service in Flagstaff, showers and thunderstorms are likely to develop late Wednesday morning and last into the evening. The strongest cells may bring localized flooding and gusts up to 20 mph. Calm early morning conditions will quickly shift as storms build, with travelers advised to keep devices charged and avoid flooded roadways.
Thursday carries the highest risk of widespread rainfall, with showers and thunderstorms likely between 11 a.m. and 5 p.m. Conditions may improve briefly before additional storms redevelop overnight. Friday brings a slight chance of rain before skies turn partly sunny, but gusty winds could still reach 20 mph.
Weekend conditions trend unsettled, with scattered showers possible Saturday and Sunday, though rainfall totals look lighter than midweek. Outdoor plans, including football games and late summer festivals, could face occasional weather interruptions. Residents should monitor updates and plan for alternate indoor activities.
Storm risks are expected to ease by early next week, though another system could approach by Monday night. Officials caution that alerts may be extended if rainfall intensifies or storm coverage expands.
Five-Day Forecast for Flagstaff, AZ
- Wednesday: Showers and thunderstorms likely. High near 79°F. Low 51°F.
- Thursday: Thunderstorms and heavy rain possible. High 76°F. Low 50°F.
- Friday: Partly sunny, chance of showers. High 73°F. Low 49°F.
- Saturday: Scattered showers and storms. High 76°F. Low 48°F.
- Sunday: 50% chance of storms. High 77°F. Low 48°F.
