WATCHES: Severe Thunderstorm Watch Number 322

WWUS20 KWNS 021803
SEL2
SPC WW 021803
DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-CWZ000-030000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 322
NWS STORM PREDICTION CENTER NORMAN OK
155 PM EDT TUE JUN 2 2009

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

DISTRICT OF COLUMBIA
DELAWARE
EASTERN MARYLAND
SOUTHERN NEW JERSEY
SOUTHEASTERN PENNSYLVANIA
NORTHEASTERN VIRGINIA
COASTAL WATERS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 155 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF
LAKEHURST NEW JERSEY TO 15 MILES WEST SOUTHWEST OF PATUXENT RIVER
MARYLAND. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 321...

DISCUSSION...AN UPPER LEVEL IMPULSE MOVING EWD THROUGH ERN PA WAS
HELPING TO INITIATE STORMS IN SRN PA. THESE STORMS ARE EXPECTED TO
INCREASE IN NUMBER AND INTENSIFY AS THEY MOVE SEWD AT 30-40 MPH.
DEEP LAYER SHEAR AND 30-40 KT MID LEVEL WINDS ARE SUPPORTIVE OF LINE
SEGMENTS/BOWS WITH WIND DAMAGE THE GREATER THREAT. HOWEVER...THE
AMOUNT OF SHEAR COMBINED WITH MODERATE INSTABILITY WILL ALSO SUPPORT
STORMS WITH MID LEVEL ROTATION AND SEVERE HAIL.

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 450. MEAN STORM
MOTION VECTOR 30035.

...IMY

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