SWODY1
SPC AC 211239
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0639 AM CST WED JAN 21 2009
VALID 211300Z - 221200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
LARGE SCALE PATTERN WILL MAINTAIN DRY/STABLE PATTERN ACROSS MOST OF
THE CONUS THROUGH THE PERIOD. HOWEVER...WRN U.S. RIDGE WILL FLATTEN
AND SHIFT EWD AHEAD OF PROGRESSIVE SHORTWAVE TROUGH NOW APPROACHING
THE WEST COAST. MOIST SSWLY FLOW THROUGH A DEEP LAYER WILL CONTINUE
OVERSPREADING THE WEST COAST...AND SUPPORT MOIST CONVECTION FROM WRN
ORE INTO SRN CA. WEAK...ELEVATED INSTABILITY IS EXPECTED TO DEVELOP
ALONG THE SRN CA COAST AND PERHAPS SUPPORT AN ISOLATED LIGHTNING
STRIKE OR TWO...ESPECIALLY DURING LATTER HALF OF THE PERIOD.
..EVANS.. 01/21/2009
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