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WWUS20 KWNS 121846

SEL4

SPC WW 121846

MDZ000-OHZ000-PAZ000-VAZ000-WVZ000-130300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 84

NWS Storm Prediction Center Norman OK

250 PM EDT Sat May 12 2018



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western and northern Maryland

  Southeast Ohio

  Southern Pennsylvania

  Far northern Virginia

  Northern West Virginia



* Effective this Saturday afternoon and evening from 250 PM until

  1100 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...Scattered storms are expected to increase along and ahead

of a cold front. Some of this activity will grow into clusters and

linear segments with the primary hazard being strong to isolated

severe gusts producing damaging winds.



The severe thunderstorm watch area is approximately along and 50

statute miles north and south of a line from 35 miles northwest of

Parkersburg WV to 35 miles east northeast of Hagerstown MD. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU4).



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 500. Mean storm motion vector

27040.



...Grams

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