WATCHES: Tornado Watch Number 533

WWUS20 KWNS 242249
SEL3
SPC WW 242249
PAZ000-250500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 533
NWS STORM PREDICTION CENTER NORMAN OK
645 PM EDT SAT JUL 24 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTH-CENTRAL AND NORTHEAST PENNSYLVANIA

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 645 PM
UNTIL 100 AM EDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTH NORTHWEST OF
STATE COLLEGE PENNSYLVANIA TO 25 MILES EAST NORTHEAST OF
WILKESBARRE PENNSYLVANIA. FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 529...WW 530...WW
531...WW 532...

DISCUSSION...EARLIER EVOLVING MCS HAS NOW TRANSITIONED TO MORE OF A
DISCRETE MODE...INCLUDING SUPERCELLS. WHILE LOW-LEVEL SHEAR IS NOT
PARTICULARLY STRONG...LATEST MODEL GUIDANCE SUGGESTS THAT A 30-40 KT
LLJ WILL DEVELOP ACROSS THE AREA THROUGH 25/03Z...SUSTAINING OR
PERHAPS ENHANCING THE SHEAR. OTHERWISE...THE PRESENCE OF 1500-2000
J/KG MLCAPE AND 45-50 KT OF DEEP NWLY SHEAR WILL SUPPORT THE
CONTINUED POTENTIAL FOR SUPERCELLS WITH ATTENDANT THREATS FOR A
COUPLE TORNADOES IN ADDITION TO DAMAGING WINDS AND PERHAPS HAIL.

AVIATION...TORNADOES AND 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 28035.

...MEAD

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