SWODY1
SPC AC 110513
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1213 AM CDT SAT SEP 11 2010
VALID 111200Z - 121200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UPPER TROUGH MOVING ACROSS THE PLAINS EARLY SATURDAY MORNING WILL
TRANSLATE EWD TO THE GREAT LAKES...OH VALLEY AND SRN APPALACHIAN
MOUNTAIN REGION BY 12Z SUNDAY. THE ASSOCIATED COLD FRONT WILL MOVE
EWD IN TANDEM WITH SRN EXTENT OF THE FRONT STALLING OVER THE SRN
PLAINS.
...LOWER OH VALLEY TO CNTRL TX...
QLCS OVER CNTRL MO/SE KS EARLY SATURDAY MORNING WILL LIKELY CONTINUE
ESE INTO THE LOWER OH VALLEY AND AR OZARKS BY SUNRISE. OUTFLOW
BOUNDARY EMANATING FROM THIS SYSTEM WILL PROBABLY BE THE EFFECTIVE
FRONT WITH SATURDAY AFTERNOON/EVE THUNDERSTORMS FOCUSING ALONG IT
FROM PARTS OF WRN KY TO CNTRL AR/SE OK. OTHER STORMS WILL LIKELY
FORM FARTHER SW OVER NCNTRL/CNTRL TX AS THE COLD FRONT/PRE-FRONTAL
TROUGH SURGES S OF THE RED RIVER.
STRONGEST DEEP-LAYER FLOW WILL EXIST ACROSS THE LOWER OH
VALLEY/MID-SOUTH AND MORE ROBUST INSTABILITY WILL BE CONFINED TO TX
AND SRN AR. MULTICELL STORM MODES CAN BE EXPECTED THE LENGTH OF THE
LOW-PROBABILISTIC SEVERE AS A RESULT. A FEW CLUSTERS MAY EVOLVE
INTO BRIEF ORGANIZED BOWING SEGMENTS ACROSS THE LOWER OH
VALLEY...WHILE FARTHER SW...MORE INTENSE BOUNDARY LAYER HEATING WILL
CONTRIBUTE TO STRONG/ISOLATED SEVERE DOWNDRAFTS. THE SEVERE THREAT
WILL DIMINISH AFTER SUNSET.
..RACY/SMITH.. 09/11/2010
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