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SEL9 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 559 NWS Storm Prediction Center Norman OK 200 PM MST Wed Jul 24 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and southern Arizona * Effective this Wednesday afternoon and evening from 200 PM until 900 PM MST. * Primary threats include... Isolated damaging wind gusts to 70 mph possible SUMMARY...Clusters of thunderstorms will form over the Rim and spread southwestward to the lower deserts through late evening. The storm environment will favor strong downdrafts capable of producing occasional damaging/severe outflow gusts of 60-70 mph. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 30 miles west southwest of Phoenix AZ to 65 miles east northeast of Tucson AZ. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 0.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 03020. ...Thompson