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WWUS20 KWNS 012234

SEL0

SPC WW 012234

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 630

NWS Storm Prediction Center Norman OK

335 PM MST Sun Sep 1 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central and western Arizona



* Effective this Sunday afternoon and evening from 335 PM until

  1100 PM MST.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible



SUMMARY...Although isolated strong-severe storms already are

occurring, the potential is increasing for one or two organized

clusters to grow and send damaging to severe gusts westward across

the deserts.  The main threat area will be from that part of Pima

County west of Tucson, northward across central Arizona, and the

southern part of the I-17 corridor, westward to near the Colorado

River.



The severe thunderstorm watch area is approximately along and 105

statute miles east and west of a line from Prescott AZ to 75 miles

south of Gila Bend AZ. For a complete depiction of the watch see the

associated watch outline update (WOUS64 KWNS WOU0).



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

1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few

cumulonimbi with maximum tops to 550. Mean storm motion vector

09035.



...Edwards

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