SWODY2
SPC AC 310507
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1207 AM CDT MON OCT 31 2011
VALID 011200Z - 021200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
AN UPPER TROUGH WILL BE EXITING THE NERN STATES ON TUE...WITH AN
UPPER RIDGE BUILDING ACROSS THE OH/TN VALLEY AND APPALACHIANS. A
LARGE SURFACE HIGH WILL BE LEFT BEHIND...ENCOMPASSING THE ERN THIRD
OF THE CONUS WITH DRY AIR.
TO THE W...A POSITIVELY TILTED UPPER TROUGH WILL AMPLIFY OVER THE
ROCKIES DURING THE DAY AND INTO THE HIGH PLAINS TOWARD WED MORNING.
WEAK LOW PRESSURE WILL EXIST OVER SERN CO...WITH A LOW PRESSURE
TROUGH EXTENDING NEWD INTO IA AT 00Z. A STRONG COLD FRONT WILL
DEVELOP BEHIND THIS SURFACE TROUGH....SURGING SWD INTO THE TX
PANHANDLE BY WED MORNING.
...CNTRL PLAINS...
MOISTURE RETURN AHEAD OF THE ADVANCING COLD FRONT WILL BE MEAGER
WITH BOUNDARY LAYER DEWPOINTS ONLY IN THE 40S F FROM N TX INTO KS.
AS THE EVENING PROGRESSES...AND THE FRONT DEEPENS...A BAND OF RAIN
WITH PERHAPS EMBEDDED THUNDERSTORMS IS LIKELY TO DEVELOP POST
FRONTAL...EXTENDING FROM NERN CO INTO SRN NEB AND NRN KS. WITH SUCH
WEAK INSTABILITY...NONE OF THIS ACTIVITY WILL BE SEVERE...BUT A FEW
LIGHTNING STRIKES MAY OCCUR.
..JEWELL.. 10/31/2011
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