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WWUS20 KWNS 121843

SEL7

SPC WW 121843

NJZ000-NYZ000-PAZ000-130100-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 447

NWS Storm Prediction Center Norman OK

245 PM EDT Sat Aug 12 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western New Jersey

  Central and Eastern New York

  Central and Eastern Pennsylvania



* Effective this Saturday afternoon and evening from 245 PM until

  900 PM EDT.



* Primary threats include...

  Scattered large hail events to 1.5 inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...Storms will continue to increase and intensify this

afternoon, perhaps especially across south-central/southeast

Pennsylvania as well as east-central New York. Severe hail and wind

will be possible with the strongest storms as they spread eastward

through the afternoon and early evening.



The severe thunderstorm watch area is approximately along and 60

statute miles east and west of a line from 50 miles northeast of

Utica NY to 35 miles south of Harrisburg PA. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU7).



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

27025.



...Guyer

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