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WWUS20 KWNS 181809

SEL4

SPC WW 181809

DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-CWZ000-190200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 394

NWS Storm Prediction Center Norman OK

210 PM EDT Tue Jun 18 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  District Of Columbia

  Delaware

  Eastern Maryland

  New Jersey

  Southeast Pennsylvania

  Northern and eastern Virginia

  Coastal Waters



* Effective this Tuesday afternoon and evening from 210 PM until

  1000 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Isolated large hail events to 1.5 inches in diameter possible

  A tornado or two possible



SUMMARY...At least isolated strong to severe thunderstorms are

expected to develop from southeast Pennsylvania into New Jersey,

where potential will exist for a couple of supercells with hail/wind

and potentially some tornado risk. Other storms will also increase

this afternoon south-southwestward across the Delmarva and broader

parts of northern/eastern Virginia to eastern Maryland, with

damaging winds and some hail possible in these areas.



The severe thunderstorm watch area is approximately along and 65

statute miles north and south of a line from 20 miles southeast of

Lakehurst NJ to 55 miles west southwest of Washington DC. 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

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

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

26025.



...Guyer

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