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WWUS20 KWNS 111837

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SPC WW 111837

MDZ000-PAZ000-WVZ000-120100-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 372

NWS Storm Prediction Center Norman OK

240 PM EDT Sun Jul 11 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western Maryland

  Western and Central Pennsylvania

  Northern West Virginia



* Effective this Sunday afternoon and evening from 240 PM until

  900 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 65 mph possible

  A tornado or two possible



SUMMARY...Strong to severe thunderstorms are expected to develop

across the region through the afternoon. A moist air mass, moderate

instability, and seasonally strong deep-layer winds will support

organized storms including some supercells. Damaging winds should be

the most common risk, but a tornado could also occur, particularly

across Pennsylvania where low-level shear is maximized near the warm

front.



The severe thunderstorm watch area is approximately along and 80

statute miles north and south of a line from 40 miles southwest of

Wheeling WV to 45 miles east of State College PA. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU2).



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 371...



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

1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few

cumulonimbi with maximum tops to 500. Mean storm motion vector

24025.



...Guyer

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