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WWUS20 KWNS 041827

SEL0

SPC WW 041827

DCZ000-MDZ000-PAZ000-VAZ000-WVZ000-CWZ000-050200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 250

NWS Storm Prediction Center Norman OK

230 PM EDT Thu Jun 4 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  District Of Columbia

  Western and central Maryland

  Central Pennsylvania

  Northern Virginia

  Eastern West Virginia Panhandle

  Coastal Waters



* Effective this Thursday afternoon and evening from 230 PM until

  1000 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 65 mph possible

  Isolated large hail events to 1.5 inches in diameter possible



SUMMARY...Initially discrete cells with transient supercell

structures should develop into multiple clusters through the

afternoon into this evening. Scattered damaging winds will be the

main threat, but isolated severe hail is possible as well,

especially this afternoon.



The severe thunderstorm watch area is approximately along and 70

statute miles east and west of a line from 45 miles northeast of

State College PA to 75 miles south southwest of Martinsburg WV. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 249...



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

1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A

few cumulonimbi with maximum tops to 450. Mean storm motion vector

24030.



...Grams

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