Arizona – Thunderstorms could pop up after 11 a.m. Saturday, threatening to disrupt summer plans in Flagstaff and across northern Arizona. Motorists on I-17 and Route 66 should be ready for wet pavement, gusty winds, and reduced visibility during passing showers. With highs near 88°F, Saturday’s summer weather alert is your signal to check travel routes and outdoor schedules, especially if you plan to hike, bike, or drive.
According to the National Weather Service in Flagstaff, a 10 percent chance of showers and thunderstorms begins late Saturday morning and lasts through the afternoon. Winds from the southwest at 6 to 10 mph, with gusts to 17 mph, may increase fire danger if lightning strikes dry areas. If storms approach, seek shelter and avoid open terrain or tall trees. Stay tuned to local advisories for updates before heading out.
Sunday brings an increased 30 percent chance for thunderstorms, with afternoon highs around 90°F. The threat continues into Monday, when the chance of storms jumps to 40 percent. These pop-up showers could bring quick downpours and brief travel hazards, especially near Flagstaff Pulliam Airport and along main corridors.
Use caution on regional highways, especially during storm bursts. Charge devices ahead of time and avoid exposed outdoor activities if thunder roars. While some sunshine is likely between showers, Flagstaff’s weekend weather pattern will stay active.
Five Day Flagstaff Weather Outlook (Sat, July 12 – Tues, July 16):
- Saturday: Slight chance of T-storms after 11 a.m., high 88°F, gusty winds.
- Sunday: 30% chance of T-storms after 11 a.m., high 90°F.
- Monday: 40% chance of T-storms, high 89°F.
- Tuesday: 20% chance of T-storms after 11 a.m., high 87°F.
- Wednesday: 30% chance of showers and thunderstorms, high 86°F.
