SWODY1
SPC AC 211918
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0118 PM CST WED JAN 21 2009
VALID 212000Z - 221200Z
...NO SVR TSTM AREAS FORECAST...
...SRN CA...
MORNING RAOB FROM SAN DIEGO SAMPLED THE ATMOSPHERE WITHIN THE PLUME
OF SUBTROPICAL MOISTURE AND INDICATED 6.5 C/KM MID LEVEL LAPSE RATES
AND MOIST LAYERS BETWEEN 700 AND 500 MB. FORCING FOR ASCENT WITHIN
THIS ENVIRONMENT ASSOCIATED WITH EJECTING IMPULSES IN ADVANCE OF THE
PRIMARY UPPER TROUGH WILL CONTINUE TO PROMOTE SCATTERED ELEVATED
CONVECTION ABOVE A DRY BOUNDARY LAYER. WEAK CAPE WITH 200 J/KG IN
THE 700-400 MB LAYER MIGHT BE SUFFICIENT TO SUPPORT A FEW LIGHTNING
STRIKES WITH THIS MID LEVEL CONVECTION...BUT LIGHTNING COVERAGE IS
EXPECTED TO REMAIN VERY ISOLATED.
..DIAL.. 01/21/2009
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