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MESOSCALE DISCUSSION 0269
NWS STORM PREDICTION CENTER NORMAN OK
0340 AM CDT THU MAR 26 2009
AREAS AFFECTED...SE LA AN SE MS THROUGH SW AND CNTRL AL
CONCERNING...TORNADO WATCH 67...
VALID 260840Z - 261015Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 67 CONTINUES.
THREAT FOR ISOLATED TORNADOES AND DAMAGING WIND WILL PERSIST NEXT
FEW HOURS AS LINE OF STORMS MOVES INTO AL.
A SQUALL LINE WITH EMBEDDED SUPERCELL AND BOWING SEGMENTS EXTENDS
FROM NW AL SSWWD THROUGH SERN MS AND SE LA MOVING EAST AT 35-40 KT.
STRONG STORM RELATIVE INFLOW FROM THE MOIST WARM SECTOR WILL HELP
MAINTAIN THE FORWARD PROPAGATING MCS NEXT SEVERAL HOURS. AN AXIS OF
LOW-MID 60S DEWPOINTS DOWNSTREAM FROM THE LINE EXTENDING NWD THROUGH
CNTRL AL IS SUPPORTING MARGINAL BUT SUFFICIENT INSTABILITY FOR THE
ACTIVITY TO DEVELOP EWD. POTENTIAL ALSO EXISTS FOR ISOLATED MORE
DISCRETE CONVECTION TO INTENSIFY AND EVOLVE INTO SUPERCELLS AHEAD OF
THE LINE. STRONG SHEAR AND LARGE 0-1 KM HODOGRAPHS ACCOMPANYING THE
EJECTING SHORTWAVE TROUGH AND ITS ATTENDANT 50+ KT SSWLY LOW LEVEL
JET WILL CONTINUE TO SUPPORT ORGANIZED STRUCTURES...ALONG WITH A
THREAT FOR ISOLATED TORNADOES AND DAMAGING WIND.
..DIAL.. 03/26/2009
ATTN...WFO...BMX...MOB...JAN...LIX...
LAT...LON 32548621 31078704 30108822 29428972 29619019 30058995
31028917 32028851 33708751 33668617 32548621
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