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WWUS20 KWNS 101711

SEL8

SPC WW 101711

DCZ000-MDZ000-NCZ000-VAZ000-WVZ000-CWZ000-102300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 78

NWS Storm Prediction Center Norman OK

110 PM EDT Thu May 10 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  District Of Columbia

  Northern Maryland

  North-central North Carolina

  Much of Virginia

  The Eastern Panhandle of West Virginia

  Coastal Waters



* Effective this Thursday afternoon and evening from 110 PM until

  700 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph likely

  Isolated very large hail events to 2 inches in diameter possible



SUMMARY...Thunderstorms are forming over eastern West Virginia and

western Virginia.  These storms will spread eastward this afternoon

across the watch area, posing a risk of locally damaging wind gusts

and perhaps hail.



The severe thunderstorm watch area is approximately along and 65

statute miles east and west of a line from 35 miles north of

Baltimore MD to 30 miles west southwest of South Hill VA. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU8).



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

2 inches. Extreme turbulence and surface wind gusts to 60 knots. A

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

26035.



...Hart

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