SWOMCD
SPC MCD 271338
TXZ000-271515-
MESOSCALE DISCUSSION 0878
NWS STORM PREDICTION CENTER NORMAN OK
0838 AM CDT WED MAY 27 2009
AREAS AFFECTED...SOUTH CENTRAL TX
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 271338Z - 271515Z
...SEVERE THREAT IS INCREASING ACROSS MUCH OF SOUTH CENTRAL TX...
EXPANDING THUNDERSTORM CLUSTERS WILL SOON MERGE INTO A LARGER MCS
OVER SCNTRL TX AS BOUNDARY LAYER WARMS WITHIN WEAK WARM ADVECTION
REGIME. AIRMASS IS QUITE BUOYANT SOUTH OF THIS ACTIVITY WITH MLCAPE
VALUES ON THE ORDER OF 3000 J/KG. 12Z SOUNDINGS FROM CRP...BRO AND
EVEN DRT ALL SUPPORT A WEAKER THAN NORMAL CAP WITH 900MB BASED
PARCELS APPARENTLY UNINHIBITED. GIVEN THE HIGH PRECIPITABLE WATER
AND ADEQUATE DEEP LAYER SHEAR IT APPEARS THE MCS WILL SLOWLY
PROPAGATE SEWD WITH A THREAT FOR HAIL AND GUSTY WINDS. WILL
CONTINUE MONITORING FOR POSSIBLE WW.
..DARROW.. 05/27/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...HGX...CRP...EWX...
LAT...LON 29319726 28499479 27329584 28009813 28299990 29069998
29319726
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