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000 

WWUS20 KWNS 251917

SEL1

SPC WW 251917

MEZ000-NHZ000-CWZ000-260300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 651

NWS STORM PREDICTION CENTER NORMAN OK

320 PM EDT SAT AUG 25 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MAINE

       NEW HAMPSHIRE

       COASTAL WATERS



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 320 PM UNTIL

1100 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF

HOULTON MAINE TO 30 MILES SOUTH SOUTHWEST OF LACONIA NEW

HAMPSHIRE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 650...



DISCUSSION...A VERY UNSTABLE AIR MASS IS IN PLACE ACROSS NRN NEW

ENGLAND THIS AFTERNOON WITH SEASONABLY STRONG LOW AND DEEP LAYER

SHEAR.  EXPECT THUNDERSTORMS WILL BECOME MORE WIDESPREAD THROUGH THE

AFTERNOON/EVENING...WITH THE POTENTIAL FOR SUPERCELLS AND ORGANIZED

LINES/CLUSTERS MOVING QUICKLY ENEWD.  DAMAGING WINDS AND LARGE HAIL

CAN BE EXPECTED WITH THESE STORMS.



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 26035.





...EVANS

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