Flood Watch: Tohono O'odham Nation including Sells; Upper Santa Cruz River and Altar Valleys including Nogales; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle; Santa Catalina and Rincon Mountains including Mount Lemmon/Summerhaven; Baboquivari Mountains including Kitt Peak

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Flood Watch — Tohono O'odham Nation including Sells; Upper Santa Cruz River and Altar Valleys including Nogales; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle; Santa Catalina and Rincon Mountains including Mount Lemmon/Summerhaven; Baboquivari Mountains including Kitt Peak Severity: Severe. Certainty: Possible. * WHAT...Scattered showers and thunderstorms will be capable of producing very heavy rain in a short period of time. The excessive rain will lead to increased chances for flash flooding. The heavy rain will also lead to significant flow in area washes, creeks, and rivers. * WHERE...A portion of Southeast Arizona, including the following areas, Baboquivari Mountains, Catalina and Rincon Mountains, South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area and Upper Santa Cruz River Valley/Altar Valley. * WHEN...From 2 PM MST this afternoon until 5 AM MST Friday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Daytime heating will combine with a very moist atmosphere to produce scattered showers and thunderstorms which will be capable of very heavy rain. Storms will continue after sunset. Isolated rainfall totals of 1 to 3 inches are possible. - http://www.weather.gov/safety/flood