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Mesoscale Discussion 2374 |
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MESOSCALE DISCUSSION 2374
NWS STORM PREDICTION CENTER NORMAN OK
0619 PM CST WED DEC 07 2011
AREAS AFFECTED...PARTS OF SRN AND ERN MD...DE AND SRN NJ
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 080019Z - 080045Z
A NEW SEVERE TSTM WATCH IS BEING CONSIDERED TO THE NNE OF WW 897 FOR
AREAS INCLUDING SRN AND ERN MD /TO THE S AND E OF THE WASHINGTON
DC/BALTIMORE CORRIDOR/...MUCH OF DE AND PARTS OF SRN NJ.
EARLY EVENING SURFACE ANALYSIS INDICATED A PRIMARY AREA OF LOW
PRESSURE LOCATED OVER CENTRAL VA...WITH A WARM FRONT EXTENDING NEWD
THROUGH THE SRN EXTENT OF ERN MD...CENTRAL DE...FAR SERN NJ...AND
JUST S OF LONG ISLAND. A SECOND AREA OF LOW PRESSURE WAS ANALYZED
OVER SRN NJ ALONG THE FRONT. GIVEN UPSTREAM FAST MOVING /ENE AT 40
KT/ LINE OF LOW-TOPPED CONVECTION AND EMBEDDED TSTMS /MAINLY VA
PORTION/...SMALL DOWNSTREAM WARM SECTOR NNE OF WW 897 POSES A
POTENTIAL FOR STRONG WIND GUSTS TO REACH THE SURFACE WITH THE
PASSAGE OF THE CONVECTION. EARLIER REPORTS VIA WFO RALEIGH/ROANOKE
INDICATED WIND GUSTS ASSOCIATED THUS FAR WITH THIS LINE OF ACTIVITY
RANGED FROM 50-60 MPH...WHILE A NEAR 65 MPH GUST OCCURRED AT KRIC AT
0007Z.
STRONG FORCING FOR ASCENT WILL SPREAD ACROSS THE MID ATLANTIC STATES
THIS EVENING AND GIVEN A NEWD TRACK OF THE DEEPENING SURFACE
LOW...THE WARM SECTOR WILL BE SUSTAINED OVER LAND. THIS WILL PROVE
FAVORABLE FOR STRONGER WIND GUSTS TO CONTINUE AFFECTING THE LAND
AREAS PRIOR TO THE STRONGER CONVECTION MOVING OFFSHORE AROUND 03Z.
..PETERS.. 12/08/2011
ATTN...WFO...PHI...AKQ...LWX...
LAT...LON 38017485 37957648 38097721 38597683 39207582 39477502
39437415 38017485
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