Severe Thunderstorm Watch Issued for Southwestern Sections of Our Area...

URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 427

NWS Storm Prediction Center Norman OK

300 PM EDT Wed Aug 11 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 

  Northern Delaware

  Eastern Maryland

  Parts of western and southern New Jersey

  South central and southeastern Pennsylvania

  Coastal Waters

* Effective this Wednesday afternoon and evening from 300 PM

  until 900 PM EDT.

* Primary threats include...

  Scattered damaging wind gusts to 60 mph possible

  Isolated large hail events to 1 inch in diameter possible

SUMMARY...Scattered pulse-type severe storms are expected across

southern Pennsylvania and vicinity through the remainder of the

afternoon/evening, and new storms may also form along an outflow

boundary with ongoing storms approaching south central Pennsylvania.

Occasional wind damage with precipitation-loaded downbursts should

be the main severe threat, though isolated marginally severe hail

near 1 inch diameter may occur briefly in the strongest storms.

The severe thunderstorm watch area is approximately along and 55

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

Altoona PA to 15 miles east southeast of Allentown 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 423...WW 424...WW

425...WW 426...

AVIATION...A few severe thunderstorms with hail surface and aloft to

1 inch. Extreme turbulence and surface wind gusts to 50 knots. A few

cumulonimbi with maximum tops to 500. Mean storm motion vector

27015.

...Thompson

======================================================================

045 

WWUS40 KWNS 111859

WWP7  

SEVERE THUNDERSTORM WATCH PROBABILITIES FOR WS 0427

NWS STORM PREDICTION CENTER NORMAN OK

0155 PM CDT WED AUG 11 2021

WS 0427

PROBABILITY TABLE:

PROB OF 2 OR MORE TORNADOES                        : <05%

PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES       : <02%

PROB OF 10 OR MORE SEVERE WIND EVENTS              :  40%

PROB OF 1 OR MORE WIND EVENTS >= 65 KNOTS          :  20%

PROB OF 10 OR MORE SEVERE HAIL EVENTS              :  20%

PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES          : <05%

PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS :  60%

&&

ATTRIBUTE TABLE:

MAX HAIL /INCHES/                            : 1.0

MAX WIND GUSTS SURFACE /KNOTS/               : 50

MAX TOPS /X 100 FEET/                        : 500

MEAN STORM MOTION VECTOR /DEGREES AND KNOTS/ : 27015

PARTICULARLY DANGEROUS SITUATION             : NO

&&

FOR A COMPLETE GEOGRAPHICAL DEPICTION OF THE WATCH AND

WATCH EXPIRATION INFORMATION SEE WOUS64 FOR WOU7.

$$

Have a fantastic day!

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