Saturday, May 2, 2009

MESO: Mesoscale Discussion 0673

ACUS11 KWNS 022210
SWOMCD
SPC MCD 022210
MSZ000-LAZ000-TXZ000-022315-

MESOSCALE DISCUSSION 0673
NWS STORM PREDICTION CENTER NORMAN OK
0510 PM CDT SAT MAY 02 2009

AREAS AFFECTED...NERN TX AND NRN LA

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY

VALID 022210Z - 022315Z

21Z SHV SOUNDING EXHIBITED MINIMAL SBCINH...1761 J/KG MLCAPE AND
H7-H5 LAPSE RATES OF 7.7 C/KM. TSTMS DEVELOPING UPSTREAM ACROSS
NERN TX WILL PROBABLY CONTINUE FORWARD PROPAGATING AS THE WSWLY FLOW
IN THE COLUMN AND COLD POOL DYNAMICS STRENGTHEN THROUGH THE EVE.
DMGG WINDS WILL BECOME MORE OF A THREAT WITH TIME ALONG WITH LARGE
HAIL POTENTIAL. HOWEVER...A BRIEF TORNADO COULD ALSO
OCCUR...ESPECIALLY IF A SUSTAINED BOW HEAD CAN BEGIN TO ATTACH WITH
AND FOLLOW THE SWD MOVG OUTFLOW BOUNDARY MIGRATING SWD INTO EXTREME
NRN LA. TSTMS ARE EXPECTED TO MOVE OUT OF THE RECENTLY ADDED
TORNADO WATCH IN NERN TX...LIKELY GRAZING NRN PARTS OF LA. THIS
SITUATION WOULD REQUIRE A NEW WW TO FILL IN THE GAP ACROSS NRN LA.

..RACY.. 05/02/2009

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

ATTN...WFO...JAN...SHV...

LAT...LON 33019401 32969127 32179114 31959396 31859529 33019401

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