

558 

WWUS20 KWNS 121945

SEL3

SPC WW 121945

OHZ000-PAZ000-WVZ000-LEZ000-130200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 433

NWS Storm Prediction Center Norman OK

345 PM EDT Thu Aug 12 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northeastern Ohio

  Western Pennsylvania

  The northern West Virginia Panhandle

  Lake Erie



* Effective this Thursday afternoon and evening from 345 PM until

  1000 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph likely

  Isolated large hail events to 1 inch in diameter possible



SUMMARY...Thunderstorms are beginning to form in northeastern Ohio,

and storm coverage/intensity is expected to increase through the

remainder of the afternoon as storms move into western Pennsylvania.

 The storm environment favors clusters of storms with damaging winds

of 60-70 mph, and the strongest storms may also produce isolated

large hail near 1 inch diameter.



The severe thunderstorm watch area is approximately along and 55

statute miles north and south of a line from 20 miles south

southwest of Cleveland OH to 35 miles north northeast of Latrobe PA.

For a complete depiction of the watch see the associated watch

outline update (WOUS64 KWNS WOU3).



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 431...WW 432...



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 550. Mean storm motion vector

28035.



...Thompson

