Wednesday, September 22, 2010

A Severe Thunderstorm Watch until 11:00 PM

This includes the entire Delaware and Lehigh Valley's
ACY, PHL, ILG, DOV, and NYC included.

More Discussion on the forum.
http://ruggieweather.phpbb3now.com/viewtopic.php?f=2&t=764

SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 683
NWS STORM PREDICTION CENTER NORMAN OK
345 PM EDT WED SEP 22 2010

SEVERE THUNDERSTORM WATCH 683 IS IN EFFECT UNTIL 1100 PM EDT
FOR THE FOLLOWING LOCATIONS

http://www.spc.noaa.gov/products/watch/ww0683.html

http://www.spc.noaa.gov/products/watch/ww0683_overview_big_wou.gif


URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 683
NWS STORM PREDICTION CENTER NORMAN OK
345 PM EDT WED SEP 22 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

WESTERN CONNECTICUT
DELAWARE
EASTERN MARYLAND
NEW JERSEY
SOUTHEAST NEW YORK
EASTERN PENNSYLVANIA
COASTAL WATERS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
1100 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 55
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH
NORTHWEST OF POUGHKEEPSIE NEW YORK TO 40 MILES SOUTH OF DOVER
DELAWARE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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 680...WW 681...WW 682...

DISCUSSION...TSTMS ARE EXPECTED TO DEVELOP LATE THIS AFTERNOON
ALONG/E OF LEE TROUGH AND SYNOPTIC COLD FRONT WITHIN A
WARM...MODERATELY UNSTABLE AIR MASS WITH SBCAPE VALUES OF 1000-2000
J/KG. REGIONAL VWPS AND LATEST RUC OBJECTIVE FIELDS SUGGEST THAT
DEEP WLY WIND FIELD DECREASES WITH SWD EXTENT...THOUGH SUFFICIENT
VERTICAL SHEAR WILL EXIST ACROSS WW AREA TO SUPPORT ORGANIZE STORM
MODES INCLUDING SUPERCELL AND BOWING STRUCTURES WITH A RISK FOR
MAINLY DAMAGING WIND GUSTS.

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.

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