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Extreme Heat Warning — Upper Santa Cruz River and Altar Valleys including Nogales; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; Upper San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox; Upper Gila River and Aravaipa Valleys including Clifton/Safford Severity: Severe. Certainty: Likely. * WHAT...Thunderstorms will initially develop over the Mogollon Rim and other sky islands of Southeast Arizona during the early afternoon hours, then track southwest into the valleys of Southeast Arizona and become widespread during the late afternoon and early evening. The stronger storms will produce organized thunderstorm outflow winds between 40-50 mph, resulting in dense blowing dust with visibility between one-half and one mile and possibly a haboob with near-zero visibility. For the Extreme Heat Warning, dangerously hot conditions with temperatures 101 to 106 in Santa Cruz and Cochise counties and 107 to 112 elsewhere. Major to Extreme HeatRisk is expected. * WHERE...Eastern Cochise County below 5000 feet, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley, and Upper Santa Cruz River Valley/Altar Valley. * WHEN...For the Extreme Heat Warning, until 8 PM MST Monday. For the Blowing Dust Advisory, from 2 PM to 8 PM MST Monday. * IMPACTS...Hazardous driving conditions due to reduced visibility. Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Warm overnight low temperatures of 84 to 90 degrees in the deserts will provide little to no relief from heat overnight. Warmest overnight low temperatures expected in the Western Deserts.
The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.