SWODY1
SPC AC 201602
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1002 AM CST TUE NOV 20 2007
VALID 201630Z - 211200Z
..NO SVR TSTM AREAS FORECAST...
COLD TROUGH WILL AMPLIFY SEWD ACROSS NRN AND CENTRAL ROCKIES WITH
RISING HEIGHTS ERN U.S. LEADING TO AN INCREASING SWLY FLOW MIDDLE OF
THE CONUS THIS FORECAST PERIOD. STRONG COLD FRONT SURGING SEWD
CENTRAL HIGH PLAINS IN ADVANCE OF UPPER TROUGH PRECEEDED BY
UNSEASONABLY WARM/MOIST AIR MOVING NEWD FROM THE SRN PLAINS INTO THE
MID MS VALLEY.
WEAK UPPER TROUGH OVER MEXICO WILL TRACK EWD ACROSS TX INTO LWR MS
VALLEY TODAY IN ADVANCE OF STRONG UPSTREAM SYSTEM.
THUNDERSTORM POTENTIAL IN WARM SECTOR TODAY WILL BE LIMITED GIVEN
THE GENERALLY WEAK LAPSE RATES AND THE UPPER SUPPORT WITH THE
ROCKIES TROUGH REMAINING MAINLY ON THE COLD SIDE OF THE FRONT.
ISOLD/SCTD TSTMS WILL BE POSSIBLE THIS AFTERNOON OVER SRN/ERN TX
INTO LA AS FORCING FOR ASCENT WITH LEAD IMPULSE EJECTING WITH
MEXICAN TROUGH OVERSPREADS REGION DURING MAX HEATING.
ISOLD TSTMS MAY FORM TONIGHT IN ANAFRONTAL ENVIRONMENT FROM
CNTRL/SRN MI SW INTO THE OZARKS AND POSSIBLY NE OK. OTHER
SHOWERS/POSSIBLE STORMS MAY FORM LATE IN THE PERIOD OVER AR ON
LEADING EDGE OF STRONGER THETA-E ADVECTION ALONG 40 KT SWLY LLJ.
ANY SVR THREAT SHOULD REMAIN VERY LIMITED GIVEN WEAK INSTABILITY AND
ASCENT.
.HALES/BOTHWELL.. 11/20/2007
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