SWODY1
SPC AC 281542
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1042 AM CDT SUN OCT 28 2007
VALID 281630Z - 291200Z
..NO SVR TSTM AREAS FORECAST...
BROAD/COLD UPPER TROUGH WILL CONTINUE TO SHIFT EASTWARD OVER
QUEBEC/NEW ENGLAND TODAY...ALLOWING THE UPPER RIDGE TO BUILD
NORTHWARD OVER THE ROCKIES AND PLAINS STATES. ATTENDANT TO THE
AFOREMENTIONED UPPER TROUGH...TRAILING PORTION OF A WESTERN ATLANTIC
COLD FRONT WILL BE THE PRIMARY FOCUS FOR THUNDERSTORM POTENTIAL
ACROSS THE FL PENINSULA AND ADJACENT COASTAL WATERS THROUGH THE
PERIOD. RESIDUAL MOIST AIRMASS/LOW LEVEL EASTERLY FLOW SOUTH OF THE
COLD FRONT AND MARGINAL INSTABILITY -- MLCAPE LESS THAN 500 J/KG --
WILL SUPPORT THUNDERSTORM POTENTIAL. HOWEVER...MODEST LAPSE
RATES/CLOUD COVER AND WEAK VERTICAL SHEAR WILL LIMIT THUNDERSTORM
INTENSITY TODAY. ELSEWHERE...UPPER LOW OFF THE CA COAST CURRENTLY
CENTERED NEAR 33N/130W WILL BEGIN TO PUSH TOWARD CA LATE IN THE
PERIOD. HOWEVER...ANY THUNDERSTORM POTENTIAL ACROSS/NEAR CA IS
LIKELY TO WAIT UNTIL AFTER 12Z/29. OTHERWISE...INFLUENCE OF HIGH
PRESSURE AND COOL/STABLE CONDITIONS WILL PRECLUDE THUNDERSTORMS OVER
THE REMAINDER OF THE CONUS.
.GUYER/HALES.. 10/28/2007
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