SWOMCD
SPC MCD 132258
TXZ000-140000-
MESOSCALE DISCUSSION 0483
NWS STORM PREDICTION CENTER NORMAN OK
0558 PM CDT FRI APR 13 2007
AREAS AFFECTED...S CNTRL TX
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 132258Z - 140000Z
SCATTERED STORMS ARE LIKELY TO PERSIST ALONG FRONTAL BOUNDARY AS IT
SHIFTS SEWD WITH MAINLY A LARGE HAIL AND DAMAGING WIND THREAT.
ISOLATED TORNADOES MAY OCCUR OVER ERN PORTIONS OF THE AREA WHERE LOW
LEVEL MOISTURE IS RICHER...BUT ONLY IF STORM MODE IS NON-LINEAR.
STRONG INSTABILITY EXIST AHEAD OF THE COLD FRONT WHERE SIGNIFICANT
SURFACE HEATING HAS TAKEN PLACE. ALTHOUGH DEWPOINTS HAVE MIXED OUT
INTO THE 50S WITHIN PRE FRONTAL TROUGH...STRONG COOLING ALOFT AND
STEEP LAPSE RATES SHOULD ALLOW FOR MINIMAL CIN FOR SEVERAL HOURS.
THUS...STORMS SHOULD PERSIST ALONG FRONT AS IT CONTINUES SE.
DEEP LAYER SHEAR VECTORS ARE CURRENTLY PARALLEL TO THE FRONT. THIS
WILL FOSTER MORE OF A LINEAR STORM MODE WITH DAMAGING WIND GUSTS AND
LARGE HAIL THE PRIMARY THREATS. ISOLATED TORNADOES CANNOT BE RULED
OUT FARTHER E TOWARD SAT WHERE DEWPOINTS ARE IN THE UPPER
60S...SHOULD STORMS REMAIN SEMI-CELLULAR BY THE TIME THEY GET INTO
THAT REGION.
.JEWELL.. 04/13/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FWD...EWX...SJT...
29690143 30410049 31419921 30799708 29449878 28240019
28740045 29130070
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