

000 

WWUS20 KWNS 181911

SEL8

SPC WW 181911

MEZ000-NHZ000-NYZ000-VTZ000-190200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 838

NWS STORM PREDICTION CENTER NORMAN OK

310 PM EDT MON AUG 18 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL MAINE

       NORTHERN NEW HAMPSHIRE

       CENTRAL AND NORTHERN NEW YORK

       VERMONT



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 310 PM UNTIL

1000 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 65

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

OF SYRACUSE NEW YORK TO 25 MILES NORTH OF HOULTON 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.



OTHER WATCH INFORMATION...CONTINUE...WW 837...



DISCUSSION...THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER CENTRAL NY IN

REGION OF MODERATE INSTABILITY...AND AHEAD OF WEAK SHORTWAVE TROUGH

OVER NORTHERN OH.  THIS ACTIVITY WILL LIKELY DEVELOP EASTWARD ACROSS

PARTS OF VT/NH DURING THE NEXT FEW HOURS WITH A RISK OF HAIL IN

STRONGER CELLS.  ANOTHER MORE ORGANIZED LINE OF THUNDERSTORMS WILL

BEGIN AFFECTING NORTHERN ME IN THE NEXT FEW HOURS WITH A RISK OF

DAMAGING WINDS AND HAIL.  THIS LINE WILL SAG SOUTHWARD THROUGH THE

EVENING INTO MUCH OF THE REMAINDER OF THE WATCH AREA.



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 450. MEAN STORM

MOTION VECTOR 26030.





...HART

