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WWUS20 KWNS 232319

SEL5

SPC WW 232319

MEZ000-NHZ000-240700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 505

NWS STORM PREDICTION CENTER NORMAN OK

715 PM EDT MON JUL 23 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND SOUTHERN MAINE

       NORTHERN NEW HAMPSHIRE



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 715 PM UNTIL

300 AM EDT.



HAIL TO 1.5 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 50

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTH OF

LACONIA NEW HAMPSHIRE TO 85 MILES NORTH OF AUGUSTA MAINE.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 504...



DISCUSSION...NUMEROUS STRONG TO SEVERE STORMS WERE DEVELOPING EAST

ACROSS VT AND SRN QUEBEC THIS EVENING AHEAD OF A DEEPENING UPPER

TROUGH AND ADVANCING COLD FRONT ACROSS SRN ONTARIO. AN AXIS OF

UNCAPPED UNSTABLE AIR WAS SITUATED FROM NH INTO WRN ME WHERE A MOIST

AND RELATIVELY WARM BOUNDARY LAYER SHOULD CONTINUE TO ALLOW FOR A

FEW STORMS TO REMAIN ROBUST WHILE MOVING EAST ACROSS THE CONNECTICUT

RIVER AND INTO NH/WRN ME. MID LEVEL FLOW MAY STRENGTHEN COINCIDENT

WITH THE ADVANCING STORMS AND THUS CONTRIBUTE TO MAINTAINING

ORGANIZATION TO THE CONVECTIVE SYSTEM. HAIL TO 1.5 INCHES WILL BE

POSSIBLE WITH SOME OF THE MORE INTENSE CORES. AN INCREASE IN

DAMAGING WIND POTENTIAL WILL BE POSSIBLE IF CONVECTIVE SYSTEM CAN

MAINTAIN ITS LINEAR STRUCTURE IN THE PRESENCE OF INCREASING LARGE

SCALE ASCENT WITH THE DIGGING UPPER TROUGH.



AVIATION...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 27030.





...CARBIN

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