DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 170054
SWODY1
SPC AC 170052

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0752 PM CDT SUN SEP 16 2012

VALID 170100Z - 171200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A LARGE UPPER TROUGH WILL CONTINUE DIGGING SEWD ACROSS THE N CENTRAL
U.S. THIS PERIOD...DRIVING A COLD FRONT SWD AND EWD WITH TIME. BY
THE END OF THE PERIOD...THIS FRONT SHOULD EXTEND FROM THE UPPER
GREAT LAKES REGION SWWD TO THE SRN HIGH PLAINS.

MEANWHILE...A WEAK UPPER LOW NOW CROSSING THE MID/LOWER RIO GRANDE
VALLEY OF S TX WILL CONTINUE SHIFTING ESEWD -- WITH A WEAK SURFACE
LOW PROGGED TO EVOLVE ACROSS THE WRN GULF IN RESPONSE. A BROAD ZONE
OF DOWNSTREAM LOW-LEVEL WARM ADVECTION ACROSS THE SERN U.S. WILL
MAINTAIN SHOWERS AND THUNDERSTORMS ACROSS THIS REGION...THOUGH
MODEST INSTABILITY AND RELATIVELY WEAK FLOW ALOFT SUGGESTS LITTLE IF
ANY SEVERE THREAT. MEANWHILE...ELEVATED CONVECTIVE DEVELOPMENT
SHOULD OCCUR TO THE COOL SIDE OF THE FRONT SHIFTING ACROSS THE
PLAINS LATER THIS EVENING/OVERNIGHT. HERE TOO...LACK OF FAVORABLE
INSTABILITY/SHEAR PRECLUDES APPRECIABLE SEVERE POTENTIAL.

..GOSS.. 09/17/2012

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