SWODY1
SPC AC 211628
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1028 AM CST FRI DEC 21 2007
VALID 211630Z - 221200Z
..NO SVR TSTM AREAS FORECAST...
..SYNOPSIS...
AMPLIFIED PROGRESSIVE PATTERN TO CONTINUE. SHORTWAVE RIDGING WILL
OCCUR FROM THE GULF STATES INTO THE OH VLY IN WAKE OF STRONG VORT
MAX EXITING THE GA CST. UPSTREAM SRN BRANCH DISTURBANCE NOW OVER
WRN AZ SHOULD REACH FAR W TX THIS EVENING BEFORE TURNING ENE INTO NW
TX EARLY SATURDAY.
AT THE SFC...LEE LOW SHOULD SETTLE SLOWLY SE INTO W TX LATER
TODAY/TONIGHT...WITH ASSOCIATED LLJ STRENGTHENING NNEWD FROM CNTRL/E
TX INTO THE MID MS VLY.
..SWRN U.S...
DIURNAL HEATING AND MID LVL COLD ADVECTION ASSOCIATED WITH WRN AZ
UPR TROUGH WILL STEEPEN LOW TO MID LVL LAPSE RATES ACROSS PARTS OF
THE SWRN DESERTS TODAY. COUPLED WITH OROGRAPHIC UPLIFT AND MOISTURE
WITH TROUGH...SETUP SHOULD YIELD SCTD AREAS OF STRENGTHENING/
DEEPENING CONVECTION BY AFTN OVER ERN AZ/WRN NM. SOUNDINGS SUGGEST
THAT ACTIVITY WILL BE DEEP ENOUGH FOR CHARGE SEPARATION/THUNDER
THROUGH EARLY TONIGHT.
..SE U.S...
VWP AND VISIBLE SATELLITE DATA SUGGEST THAT DEEPEST LOW LVL
CONVERGENCE FIELDS/WIND SHIFT LINES ASSOCIATED WITH DEPARTING UPR
TROUGH HAVE ALREADY CLEARED ALL BUT THE EXTREME SE PART OF THE FL
PENINSULA. CONVERGENCE EXPECTED TO REMAIN TOO WEAK TO SUPPORT STORM
DEVELOPMENT OVER THE PENINSULA TODAY AS UPR SYSTEM CONTINUES EWD.
FARTHER N...ELEVATED CONVECTION ASSOCIATED WITH WAA N OF THE VORT
SHOULD REMAIN OFFSHORE AND NOT AFFECT THE SC/NC CSTS.
.CORFIDI.. 12/21/2007
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