SWODY1
SPC AC 231254
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0654 AM CST WED JAN 23 2008
VALID 231300Z - 241200Z
..NO SVR TSTM AREAS FORECAST...
..SYNOPSIS...
A STRONG NRN STREAM SHORTWAVE TROUGH...NOW OVER THE NRN HIGH
PLAINS...WILL DIG SEWD TO THE MS AND LOWER OH VALLEYS BY EARLY
THURSDAY. IN THE WAKE OF THIS TROUGH...A SURFACE RIDGE WILL BUILD
SSEWD ACROSS THE PLAINS/MS VALLEY...BRINGING A REINFORCING SURGE OF
ARCTIC AIR. MEANWHILE...THE ONLY SUBSTANTIAL L0W-LEVEL MOISTURE AND
WEAK INSTABILITY WILL RESIDE ACROSS THE GULF OF MEXICO/FL...AND
ALONG THE CA COAST IN ASSOCIATION WITH A SLOW MOVING CLOSED LOW.
..FL TODAY...
THE REMNANTS OF OVERNIGHT THUNDERSTORMS PERSIST OVER THE CENTRAL FL
PENINSULA...THOUGH THE CONVECTION HAS DECREASED IN COVERAGE THE PAST
FEW HOURS. THIS CONVECTION HAS BEEN ASSOCIATED WITH A VERY SUBTLE
MID LEVEL TROUGH...AND AREAS N OF A TAMPA BAY TO CAPE CANAVERAL LINE
HAVE BEEN STABILIZED BY THE EXTENSIVE CONVECTION. ADDITIONAL
THUNDERSTORM DEVELOPMENT MAY OCCUR TODAY INTO THIS EVENING ACROSS
CENTRAL/E CENTRAL FL ALONG THE SRN FRINGES OF THE OVERNIGHT
CONVECTION. WEAK INSTABILITY AND MARGINAL LOW-LEVEL SHEAR SUGGEST
THAT ANY SEVERE STORM THREAT WILL BE MINIMAL.
..CENTRAL CA COAST...
THE CLOSED MID LEVEL LOW W OF SAN FRANCISCO WILL MOVE LITTLE THROUGH
THE PERIOD. HOWEVER...AN EMBEDDED SHORTWAVE TROUGH WILL ROTATE
EWD/NEWD OVER THE CENTRAL/SRN CA COAST BY THIS EVENING ALONG WITH A
BAND OF PRECIPITATION. VERY MARGINAL INSTABILITY INLAND WILL BE A
LIMITING FACTOR FOR THUNDERSTORMS...WHILE THE SOMEWHAT GREATER
INSTABILITY WILL RESIDE JUST OFFSHORE WITHIN THE MID LEVEL COLD
POOL.
.THOMPSON.. 01/23/2008
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