Severe Thunderstorm Watch-Washington County

[ture....@dot.gov]

The Storm Prediction Center earlier issued a Severe Thunderstorm Watch for Eastern New York and Far Western Vermont.  At 4:56 PM The National Weather Service extended the watch area to include Washington County until 8:00 pm.  There are currently storms in the Northwestern part of the state,  and extreme northwestern Washington County is under a Severe Thunderstorm WARNING (not including Berlin).  The situation will be updated as needed. 

URGENT - IMMEDIATE BROADCAST REQUESTED

   SEVERE THUNDERSTORM WATCH NUMBER 587

   NWS STORM PREDICTION CENTER NORMAN OK

   140 PM EDT THU JUL 16 2009

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

          EXTREME NORTHWEST CONNECTICUT

          EXTREME WESTERN MASSACHUSETTS

          CENTRAL AND EASTERN NEW YORK

          EXTREME NORTHEAST PENNSYLVANIA

          WESTERN VERMONT

   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

   800 PM 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 65

   STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF

   SARANAC LAKE NEW YORK TO 25 MILES WEST OF POUGHKEEPSIE NEW YORK. 

   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

   OUTLINE UPDATE (WOUS64 KWNS WOU7).

   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...SCATTERED THUNDERSTORMS ARE DEVELOPING IN CENTRAL NY

   NEAR THE INTERSECTION OF A DIFFUSE COLD FRONT AND THE LAKE BREEZE

   ALONG THE S SHORE OF LAKE ONTARIO...WHILE ADDITIONAL DEVELOPMENT IS

   EXPECTED THIS AFTERNOON BOTH N AND S OF THIS AREA ALONG THE FRONT. 

   SURFACE TEMPERATURES ARE WARMING INTO THE UPPER 70S TO LOWER 80S

   WITH DEWPOINTS IN THE MID 60S...RESULTING IN MLCAPE VALUES OF

   1000-1500 J/KG.  SUBTLE MID LEVEL SPEED MAXIMA WILL CROSS THIS AREA

   NEAR THE FRONT DURING THE AFTERNOON AND CONTRIBUTE TO AN ENVIRONMENT

   OF DEEP WLY BULK SHEAR OF 35-40 KT...WHICH WILL BE SUFFICIENT FOR

   ORGANIZED STORMS/SUPERCELLS...ESPECIALLY WHERE SHEAR IS ENHANCED

   SOME BY TERRAIN-INDUCED LOW-LEVEL SLY FLOW.  A FEW DAMAGING GUSTS

   AND MARGINALLY SEVERE HAIL WILL BE THE MAIN THREATS THROUGH THE

   AFTERNOON/EVENING.

   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 27025.

 

WATCH COUNTY NOTIFICATION FOR WATCH 587  
NATIONAL WEATHER SERVICE BURLINGTON VT  
456 PM EDT THU JUL 16 2009  
  
VTC005-009-015-017-019-023-027-170000-  
/O.EXA.KBTV.SV.A.0587.000000T0000Z-090717T0000Z/  
  
THE NATIONAL WEATHER SERVICE HAS EXTENDED SEVERE THUNDERSTORM  
WATCH 587 TO INCLUDE THE FOLLOWING AREAS UNTIL 8 PM EDT THIS  
EVENING  
  
IN VERMONT THIS WATCH INCLUDES 7 COUNTIES  
  
IN CENTRAL VERMONT  
  
ORANGE                WASHINGTON              
  
IN NORTHEAST VERMONT  
  
CALEDONIA             ESSEX                 ORLEANS                
  
IN NORTHWEST VERMONT  
  
LAMOILLE                
  
IN SOUTHERN VERMONT  
  
WINDSOR                 
  
THIS INCLUDES THE CITIES OF...BRADFORD...ISLAND POND...JOHNSON...  
MONTPELIER...NEWPORT...RANDOLPH...SPRINGFIELD...ST. JOHNSBURY...  
STOWE AND WHITE RIVER JUNCTION.