SWOMCD
SPC MCD 022208
TXZ000-022315-
MESOSCALE DISCUSSION 0651
NWS STORM PREDICTION CENTER NORMAN OK
0508 PM CDT WED MAY 02 2007
AREAS AFFECTED...SOUTH CNTRL AND SRN TX
CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY
VALID 022208Z - 022315Z
A TORNADO WATCH WILL BE LIKELY ACROSS PORTIONS OF SCNTRL AND SRN TX
BY EARLY THIS EVE.
WATER VAPOR IMAGERY INDICATES CORE OF THE UPR LOW SPINNING EWD INTO
FAR W TX LATE THIS AFTN. ENHANCED MID-LEVEL FLOW OF 40-45 KTS WAS
OBSERVED ALONG THE BASE OF THIS FEATURE AT THE DEL RIO VWP...WITH
FAVORABLE LEFT-EXIT REGION SUPPORTING STRONG-SVR TSTMS OVER THE
EDWARDS PLATEAU. THIS JETLET WILL TRANSLATE EWD THROUGH THE EVENING
INTO CNTRL/SRN TX.
DESPITE ABSENCE OF STRONG LOW-LEVEL WARMING TODAY OWING TO A CANOPY
OF STRATOCUMULUS...AIR MASS HAS REMAINED VERY MOIST BENEATH 7-8 DEG
C PER KM H7-H5 LAPSE RATES ALOFT. THIS WAS RESULTING IN MLCAPES TO
2500 J/KG IMMEDIATELY AHEAD OF THE STORMS. 18Z DRT SOUNDING
SUGGESTED A STOUT CAP EXISTS AND CONFIRMS THE MODEL DEPICTION OF
WARM MID-TROPOSPHERIC TEMPERATURES ALONG THE LATITUDE OF ABOUT
KDRT-KCRP. THUS...IT APPEARS THE STRONGEST THREAT FOR SUSTAINED
STRONG-SVR TSTMS WILL BE ACROSS SCNTRL TX/HILL COUNTRY REGION
THROUGH MID-EVENING.
GIVEN AN INCREASE IN THE NOCTURNAL SSELY LOW-LEVEL FLOW BENEATH WLY
FLOW ALOFT AND THE MAGNITUDE OF THE BOUNDARY LAYER MOISTURE IN
PLACE...SET-UP APPEARS FAVORABLE FOR FORWARD PROPAGATION. DAMAGING
WINDS/HAIL WOULD BE THE PRIMARY THREAT...BUT BULK SHEAR WILL BE
SUFFICIENT FOR EMBEDDED SUPERCELLS WITH TORNADOES AS WELL.
.RACY.. 05/02/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...HGX...FWD...CRP...EWX...
29010064 30869787 30479652 29549654 28589815 28110019
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