MESO: Mesoscale Discussion 0320

ACUS11 KWNS 162214
SWOMCD
SPC MCD 162214
PAZ000-DEZ000-MDZ000-WVZ000-VAZ000-OHZ000-KYZ000-INZ000-162315-

MESOSCALE DISCUSSION 0320
NWS STORM PREDICTION CENTER NORMAN OK
0514 PM CDT FRI APR 16 2010

AREAS AFFECTED...PA WSWWD THROUGH SRN OH...NRN WV AND NERN KY

CONCERNING...SEVERE THUNDERSTORM WATCH 71...

VALID 162214Z - 162315Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 71
CONTINUES.

THROUGH 00Z...THE GREATEST POTENTIAL FOR DAMAGING WIND GUSTS WILL
EXIST OVER THE SERN PORTION OF WW AREA. ELSEWHERE...ISOLATED
DAMAGING WIND GUSTS WILL REMAIN POSSIBLE...THOUGH OVERALL SEVERE
THREAT SHOULD BEGIN TO DIMINISH BY 00Z.

AS OF 2152Z...REGIONAL RADAR IMAGERY INDICATED WAVY...SHORT SEGMENT
MCS EXTENDING FROM SNYDER COUNTY SSWWD INTO FRANKLIN COUNTY PA.
THIS SYSTEM HAS A HISTORY PRODUCING SEVERE WIND GUSTS AT AOO...AND
THIS THREAT WILL LIKELY CONTINUE WHILE IT PROGRESSES ESEWD AT 50-55
KT. CURRENT SURFACE OBSERVATIONS INDICATE THAT A MARINE BOUNDARY
LAYER HAS DEVELOPED WWD THROUGH NJ TO JUST W OF THE DE RIVER WHERE
TEMPERATURES DROP INTO THE 60S. THIS LIKELY DELIMITS THE EWD EXTENT
OF ANY MORE WIDESPREAD DAMAGING WIND THREAT. EXTRAPOLATION OF
CURRENT MOTION WOULD TAKE MCS INTO THIS COOLER MORE STABLE AIR MASS
BETWEEN 2330-0000 UTC. AFTER COORDINATION...A NEW WW WILL NOT BE
ISSUED FOR THE PHILADELPHIA METRO AREA.

ELSEWHERE...ISOLATED STRONG WIND GUSTS WILL REMAIN POSSIBLE WITH
LESSER ORGANIZED STORMS EXTENDING FROM LBE WSWWD PKB AS THEY ALSO
MOVE ESEWD AT 50-60 KT.

.MEAD.. 04/16/2010

..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...PHI...BGM...CTP...LWX...PBZ...RLX...CLE...JKL...
ILN...LMK...

LAT...LON 39438502 41807690 40907562 39797566 39607668 38198488
39438502

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