WW 366 VA/MD/DE/DC/NJ

[USAwx1]

205
WWUS30 KWNS 011543
SAW6
SPC AWW 011545
WW 366 SEVERE TSTM DC DE MD NJ VA WV CW 011545Z - 012200Z
AXIS..120 STATUTE MILES EAST AND WEST OF LINE..
40N BWI/BALTIMORE MD/ - 70SW NHK/PATUXENT RIVER MD/
..AVIATION COORDS.. 105NM E/W /21NE EMI - 4N RIC/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 350. MEAN STORM MOTION VECTOR 27035.

[USAwx1]

640
WWUS20 KWNS 011548
SEL6
SPC WW 011545
DCZ000-DEZ000-MDZ000-NJZ000-VAZ000-WVZ000-CWZ000-012200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 366
NWS STORM PREDICTION CENTER NORMAN OK
1145 AM EDT TUE JUN 1 2004

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

DISTRICT OF COLUMBIA
DELAWARE
MOST OF MARYLAND
SOUTHERN NEW JERSEY
NORTHERN AND CENTRAL VIRGINIA
THE EASTERN WEST VIRGINIA PANHANDLE
COASTAL WATERS

EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1145 AM UNTIL 600
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 ALONG AND 120 STATUTE MILES
EAST AND WEST OF A LINE FROM 40 MILES NORTH OF BALTIMORE MARYLAND
TO 70 MILES SOUTHWEST OF PATUXENT RIVER MARYLAND.

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 365...

DISCUSSION...SCATTERED THUNDERSTORMS...INCLUDING POSSIBLE ROTATING
STORMS... EXPECTED TO DEVELOP IN THE NEXT FEW HRS AHEAD OF MID LEVEL
SPEED MAX/ASCENT ZONE NOW CROSSING WV /PER WATER VAPOR IMAGERY/.
MODERATE TO STRONG UNIDIRECTIONAL MEAN FLOW...COOL MID LEVEL
TEMPERATURES... STRONG SURFACE HEATING AND ABSENCE OF STRONG LOW
LEVEL CONVERGENCE SUGGEST POTENTIAL FOR DISCRETE STORMS/STORM
CLUSTERS WITH DAMAGING WIND/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 350. MEAN STORM
MOTION VECTOR 27035.


...CORFIDI

;394,0742 373,0750 373,0793 394,0785;

[USAwx1]

Latest VIS satellite images already showing expansion and increase in CU and TCU over Much of Western/central PA, western MD, and NW VA suggesting convective initiation is already taking place as mid level jet max approaches the region, and forced ascent increases. this is being verified per latest NEXRAD images from the KCCX 88D.





cold 500mb temps and incr. mid level lapse rates should support large hail, and wind damage potential. Also noted Lowering WBZ heights evident on the 12z RUC soundings at PHL, which would further support hail potential.

[Stephanie]

Well, the sun has been peeking out, so it is likely to add "fuel to the fire".

[USAwx1]

:eek:

Well, the sun has been peeking out, so it is likely to add "fuel to the fire".

and will continue to also, which is contributing to SB cape values between 500 and 1000 J/kg (Joules per Kilogram) over much of PA and the Northern half of the watch area. That combined with lowest 6 KM vertical shear of over 50 KT across most of the watch area at 15z should support a severe threat through much of the day.

the threat for severe weather will also increase further northeastward into PA/NJ/NY later on as surface heating contributes to further boundary layer destabilization.

[Stephanie]

They just added another watch box for Northern NJ, PA and NY.

[Stephanie]

Update -

We had a small rain shower come through at about 1:45. After it ended, the sun came out and it got steamy. I was outside gardening and I saw the storms build to my north. I could even slightly hear rumbles of thunder in the distance. At about 3:45 it started to storm. We had some heavy winds, no hail but heavy rain and alot of thunder. I've definately seen worse, but they were on top of things today!

[Colin]

I got nailed...winds 50mph or more, the heaviest rain I've seen in a while, and nasty lightning. A tree was struck down the street from me and was knocked down...half the tree is now on the sidewalk.

[Skywatch_NC]

I got nailed...winds 50mph or more, the heaviest rain I've seen in a while, and nasty lightning. A tree was struck down the street from me and was knocked down...half the tree is now on the sidewalk.

Did you lose any power for a time?