DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 301723
SWODY2
SPC AC 301722

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1122 AM CST SUN DEC 30 2012

VALID 311200Z - 011200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A LARGE POSITIVE-TILT UPPER TROUGH WILL MOVE SLOWLY EWD ACROSS THE
CNTRL U.S. WITH BROAD SWLY FLOW ALOFT FROM THE SRN PLAINS TO THE MID
ATLANTIC. AT THE SURFACE...A LARGE SURFACE HIGH OVER THE SE WILL
MOVE OFFSHORE AND WILL MAINTAIN ELY TO SELY TRAJECTORIES ACROSS THE
GULF OF MEXICO WITH MID 60S F DEWPOINTS REACHING THE TX COAST
OVERNIGHT.

WHILE GENERALLY MILD CONDITIONS WILL PREVAIL OVER TX DURING THE
DAY...A COLD FRONT WILL DEVELOP AND WILL STRETCH FROM ROUGHLY
SHREVEPORT TO LAREDO AT 06Z. THIS FRONT WILL CONTINUE SWD TO THE TX
COAST BY 12Z TUE...AND WILL BE A FOCUS FOR RAIN AND A FEW
THUNDERSTORMS.

...SERN TX...
WEAK INSTABILITY WILL MATERIALIZE OVERNIGHT AS A 25 KT SWLY LOW
LEVEL JET TRANSPORTS MOISTURE NWD ACROSS SERN TX. AS THE COLD FRONT
DRIFTS S...RAIN AND STORMS ARE EXPECTED MAINLY JUST N OF THE
BOUNDARY. ALTHOUGH DEEP LAYER SHEAR WILL BE STRONG...IT WILL BE
ORIENTED PARALLEL TO THE SAGGING BOUNDARY. THIS...COMBINED WITH ONLY
WEAK INSTABILITY AND LACK OF SBCAPE SHOULD PRECLUDE ANY SEVERE
THREAT.

..JEWELL.. 12/30/2012

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