

651 

WWUS20 KWNS 181825

SEL5

SPC WW 181825

CTZ000-DCZ000-DEZ000-MAZ000-MDZ000-NJZ000-NYZ000-PAZ000-VAZ000-WVZ00

0-CWZ000-190100-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 455

NWS Storm Prediction Center Norman OK

225 PM EDT Fri Aug 18 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  western Connecticut

  District Of Columbia

  Delaware

  western Massachusetts

  much of Maryland

  New Jersey

  southeast New York

  eastern Pennsylvania

  parts of northern Virginia

  parts of the eastern West Virginia Panhandle

  Coastal Waters



* Effective this Friday afternoon and evening from 225 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 forecast to increase in coverage and

intensity and move eastward with time over the next few hours,

within and near the watch area.  Stronger storms/bands of storms

will be capable of producing locally damaging winds and hail through

early this evening.



The severe thunderstorm watch area is approximately along and 60

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

Poughkeepsie NY to 40 miles south southwest of Washington DC. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU5).



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

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

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

24035.



...Goss

