

129 

WWUS20 KWNS 271845

SEL6

SPC WW 271845

NYZ000-PAZ000-LEZ000-LOZ000-280000-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 456

NWS Storm Prediction Center Norman OK

250 PM EDT Thu Aug 27 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Western New York

  Northern Pennsylvania

  Lake Erie

  Lake Ontario



* Effective this Thursday afternoon and evening from 250 PM until

  800 PM EDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph likely

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Multiple supercells should develop and quickly consolidate

into a broader east-southeast moving cluster. Higher confidence in

severe storms exists across the New York portion of the watch.



The severe thunderstorm watch area is approximately along and 80

statute miles east and west of a line from 30 miles west northwest

of Rochester NY to 60 miles south of Elmira NY. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 454...WW 455...



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

29035.



...Grams

