At 740 PM MST, Doppler radar was tracking an outflow boundary with trailing showers and thunderstorms along a line extending from near Rio Verde to near Sugarloaf Mountain to near Canyon Lake. Movement was southwest at 35 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Phoenix, Mesa, Chandler, Glendale, Scottsdale, Gilbert, Tempe, Peoria, Apache Junction, Fountain Hills, Paradise Valley, Laveen, East Mesa, Gold Canyon, New River, Sun Lakes, Sun City, Queen Creek, Cave Creek, and Carefree. This includes the following highways... AZ Interstate 10 between mile markers 140 and 172. AZ Interstate 17 between mile markers 195 and 241. AZ Route 51 between mile markers 1 and 15.