

000 

WWUS20 KWNS 181724

SEL8

SPC WW 181724

MEZ000-NHZ000-NYZ000-VTZ000-CWZ000-190000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 698

NWS STORM PREDICTION CENTER NORMAN OK

125 PM EDT FRI JUL 18 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF WESTERN MAINE

       NEW HAMPSHIRE

       LARGE PART OF NORTHERN AND CENTRAL NEW YORK

       VERMONT

       COASTAL WATERS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 125 PM UNTIL 800

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 85

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES NORTH OF

SYRACUSE NEW YORK TO 30 MILES NORTH NORTHEAST OF PORTLAND MAINE.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...THUNDERSTORMS WILL INCREASE IN BOTH NUMBER AND

INTENSITY ACROSS MUCH OF THE WATCH AREA THROUGH THE AFTERNOON AS THE

AIRMASS CONTINUES TO DESTABILIZE.  WITH 30-40KT OF DEEP LAYER SHEAR

AND MLCAPES TO NEAR 2000 J/KG...DAMAGING WINDS AND LARGE HAIL WILL

OCCUR WITH THE MOST INTENSE STORMS INCLUDING WITH THE DEVELOPMENT OF

CLUSTER AND SHORTS LINES.



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 27030.





...HALES

