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WWUS20 KWNS 211837

SEL6

SPC WW 211837

MDZ000-PAZ000-VAZ000-WVZ000-220200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 346

NWS Storm Prediction Center Norman OK

240 PM EDT Tue Aug 21 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western Maryland

  Western and central Pennsylvania

  Northern Virginia

  Eastern West Virginia



* Effective this Tuesday afternoon and evening from 240 PM until

  1000 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Bands of thunderstorms will continue to intensify as they

spread northeastward across the region through the afternoon.

Localized wind damage should be the most common threat, although a

brief tornado or two could occur particularly across

west-central/south-central Pennsylvania where low-level shear will

be stronger.



The severe thunderstorm watch area is approximately along and 65

statute miles east and west of a line from 20 miles north northwest

of State College PA to 50 miles east southeast of Elkins WV. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU6).



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

1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few

cumulonimbi with maximum tops to 500. Mean storm motion vector

23030.



...Guyer

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