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WWUS20 KWNS 140152

SEL9

SPC WW 140152

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 439

NWS Storm Prediction Center Norman OK

755 PM MDT Fri Aug 13 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  central and southern Arizona



* Effective this Friday night and Saturday morning from 755 PM

  until 400 AM MDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...An increase in thunderstorm coverage is expected over the

next several hours across parts of central and southern Arizona,

where locally strong/damaging wind gusts will be possible with

stronger storms/convective bands.



The severe thunderstorm watch area is approximately along and 70

statute miles either side of a line from 25 miles east southeast of

Tucson AZ to 65 miles west northwest of Phoenix 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 437...



AVIATION...A few severe thunderstorms with hail surface and aloft to

1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few

cumulonimbi with maximum tops to 500. Mean storm motion vector

36040.



...Goss

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