Monsoon storms are expected to make a comeback in parts of Arizona on Friday and Saturday, August 8–9, 2025, mainly affecting the eastern region and the Mogollon Rim. While storms won’t be widespread statewide, some areas could see an uptick in activity, and a few could reach severe levels.
Forecasters say several atmospheric factors will help fuel these storms over the next two days. Tropical Storm Ivo in the eastern Pacific is expected to strengthen into a hurricane within 48 hours, channeling tropical moisture north through the Gulf of California as it moves just south of the gulf. Weather models also show moderate to high instability, with CAPE values between 1,500 and 2,200, Lifted Index readings from -5 to -7, and DCAPE values between 1,200 and 1,600 — conditions that could support severe weather.
The main threats include wind gusts over 60 mph, small to moderate hail, blowing dust, and localized flooding.
Friday: Isolated storm chances are expected in Santa Cruz, Cochise, eastern Pima, Graham, eastern Gila, Greenlee, Apache, and Navajo counties. Sierra Vista, Tucson, Benson, Nogales, and Show Low could see nearby storms. While coverage will remain spotty, this marks a noticeable increase after a recent lull.
Saturday: Storm chances expand along the Mogollon Rim, possibly reaching Flagstaff. Widespread severe weather isn’t anticipated, but given the instability, stronger storms remain possible.
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Katie is a senior who has been on staff for three years. Her favorite type of stories to write is reviews and features. Katie’s favorite ice cream flavor is strawberry.
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