Tucson, Ariz. – Drivers across southern Arizona should prepare for dangerous heat and possible thunderstorms Thursday, September 11, as Tucson faces highs near 104 degrees. Afternoon storms could create sudden hazards for those traveling on Interstate 10, where reduced visibility and slick roads may slow traffic. Residents attending Patriot Day remembrance events are urged to plan for shade, hydration, and potential weather disruptions.
According to the National Weather Service, Thursday’s storm chances increase after 11 a.m., with southeast winds shifting southwest in the afternoon. Even a brief thunderstorm may bring lightning and strong outflow winds, particularly for central Pima County, including downtown Tucson and surrounding neighborhoods. Heat will remain the primary concern, with a heat index topping 105 in some locations.
The risk of thunderstorms continues Thursday night with a 20 percent chance of showers before midnight. Skies gradually clear into Friday, but triple-digit heat lingers. The National Weather Service warns that extended exposure could cause heat illness, especially during outdoor ceremonies and travel. Officials recommend limiting time outside, drinking water frequently, and never leaving children or pets in vehicles.
Friday brings drier air, though highs still near 97 will keep conditions hot. The weekend looks calmer, with sunny skies Saturday and Sunday and highs between 97 and 99. Storm chances return early next week, but daytime heat remains a persistent challenge for southern Arizona.
Weather alerts remain possible through Thursday evening as storms develop, and updates will be issued if conditions worsen.
Five-Day Forecast for Tucson, Arizona:
- Thursday: Sunny, then storms possible after 11 a.m. High near 101. Storm risk continues into evening.
- Friday: Mostly sunny, high near 97. Clear at night, low around 72.
- Saturday: Sunny and hot, high near 97. Clear skies overnight.
- Sunday: Sunny, high near 98. Low near 73.
- Monday: Slight storm chance in afternoon. High near 99. Clear overnight, low near 74.
