

332 

WWUS20 KWNS 291856

SEL2

SPC WW 291856

DCZ000-MDZ000-VAZ000-WVZ000-CWZ000-300100-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 402

NWS Storm Prediction Center Norman OK

300 PM EDT Thu Jul 29 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  District Of Columbia

  Western Maryland and the Eastern Shore

  Northern Virginia

  Eastern Panhandle of West Virginia

  Coastal Waters



* Effective this Thursday afternoon and evening from 300 PM until

  900 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Isolated large hail events to 1.5 inches in diameter possible



SUMMARY...Thunderstorms are expected to develop soon along the

mountains of western Virginia and spread eastward across the watch

area.  The strongest cells will be capable of damaging wind gusts

and hail.



The severe thunderstorm watch area is approximately along and 45

statute miles north and south of a line from 60 miles west southwest

of Martinsburg WV to 40 miles east northeast of Wallops VA. 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 401...



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

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

few cumulonimbi with maximum tops to 500. Mean storm motion vector

27030.



...Hart

