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WWUS20 KWNS 272101

SEL6

SPC WW 272101

PAZ000-280500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 306

NWS STORM PREDICTION CENTER NORMAN OK

505 PM EDT SUN MAY 27 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL PENNSYLVANIA



EFFECTIVE THIS SUNDAY AFTERNOON AND MONDAY MORNING FROM 505 PM

UNTIL 100 AM EDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST

NORTHWEST OF STATE COLLEGE PENNSYLVANIA TO 30 MILES NORTHEAST OF

HARRISBURG PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 303...WW 304...WW 305...



DISCUSSION...LOOSELY ORGANIZED MCS IS ACCOMPANIED BY

MODEST/INCREASING DEEP LAYER FLOW RESULTING IN SHEAR MAGNITUDES

SUPPORTING A CONTINUATION OF THIS SYSTEM ACROSS PORTIONS OF CNTRL

AND INTO ERN PA THROUGH THE EVENING. GIVEN THAT DOWNSTREAM AIRMASS

HAS BECOME MODERATELY UNSTABLE...EXPECT THAT AT LEAST A MARGINAL

SEVERE HAIL/WIND THREAT WILL PERSIST INTO THE EVENING HOURS.



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 28020.





...CARBIN

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