URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 488
STORM PREDICTION CENTER NORMAN OK1137 AM EDT SUN JUL 1 2001
THE STORM PREDICTION CENTER HAS ISSUED ASEVERE THUNDERSTORM WATCH FOR
PORTIONS OFCENTRAL AND EASTERN PENNSYLVANIAWESTERN NEW JERSEY A SMALL PART OF
SOUTHERN NEW YORK
EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM NOON EDT UNTIL 600PM EDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70MPH...AND
DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.THE SEVERE THUNDERSTORM WATCH
AREA IS ALONG AND 80 STATUTE MILESNORTH AND SOUTH OF A LINE FROM 35 MILES
WEST OF PHILIPSBURGPENNSYLVANIA TO 35 MILES EAST NORTHEAST OF ALLENTOWN
PENNSYLVANIA.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS AREFAVORABLE FOR
SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS
SHOULD BE ON THE LOOKOUT FOR THREATENINGWEATHER CONDITIONS AND LISTEN FOR
LATER STATEMENTS AND POSSIBLEWARNINGS. SEVERE THUNDERSTORMS CAN AND
OCCASIONALLY DO PRODUCETORNADOES.OTHER WATCH INFORMATION...
CONTINUE...<A HREF="http://www.spc.noaa.gov/products/watch/ww0485.html">WW 0485</A>...<A HREF="http://www.spc.noaa.gov/products/watch/ww0486.html">WW 0486</A>...<A HREF="http://www.spc.noaa.gov/products/watch/ww0487.html">WW0487</A>...
DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE/INTENSITY
THIS AFTERNOON ALONG PRE-FRONTAL TROUGH AND WITHIN THEWARM SECTOR ACROSS PA.
SURFACE HEATING WILL RAISE SBCAPE VALUES TONEAR 3000 J/KG...WHILE LOW-MID
LEVEL WLY FLOW WILL STRENGTHEN TO40-50 KT IN ADVANCE OF THE AMPLIFYING ERN
GREAT LAKES MID LEVELTROUGH. THE STRONGER STORMS WILL BE CAPABLE OF
PRODUCING DAMAGINGWINDS AND LARGE HAIL.AVIATION...A FEW SEVERE THUNDERSTORMS
WITH HAIL SURFACE AND ALOFTTO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN
STORMMOTION VECTOR 28040.
[Non-text portions of this message have been removed]
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