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Drivers across Tucson and Southeast Arizona should prepare for changing travel conditions this weekend as an upper-level storm system moves north out of Sonora, Mexico, bringing scattered showers and a slight chance for thunderstorms, especially on Sunday and Sunday night.
While rainfall amounts are expected to remain generally light, even modest precipitation can have an outsized impact on desert roadways. Forecast totals suggest up to one-tenth of an inch of rain in valley locations, including Tucson and surrounding metro areas, with up to one-quarter inch possible in higher terrain, particularly south of Tucson and along mountain routes such as Mount Lemmon Highway, State Route 83, and roadways near the Santa Rita and Huachuca Mountains…