SWODY1
SPC AC 051225
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0625 AM CST THU FEB 05 2009
VALID 051300Z - 061200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UPR LOW OFF THE CNTRL CA CST EXPECTED TO EVOLVE INTO AN OPEN WAVE
AND CONTINUE GENERALLY ENE ACROSS CA AND THE SRN GREAT BASIN LATER
TODAY/TONIGHT AS UPSTREAM JET STREAK NOW ALONG 140W DIGS SSE TO FORM
ANOTHER NEW CLOSED LOW OFF THE SRN CA CST LATE FRI/EARLY SAT. MAIN
IMPULSE OF NOTE ASSOCIATED WITH TODAYS LOW APPEARS TO BE VORT MAX
NOW NEAR 26N/126W. THIS FEATURE SHOULD REACH THE LAX/SAN AREA BY
00Z FRI AND THE FOUR CORNERS AREA BY THE END OF THE PERIOD.
...CNTRL/SRN CA CST...
WARM CONVEYOR BELT CLOUD BAND ON E SIDE OF APPROACHING LOW/TROUGH
WILL LIMIT SFC HEATING OVER MOST OF SRN AND CNTRL CA TODAY...
ALTHOUGH A FEW BREAKS MAY OCCUR ALONG CNTRL PORTIONS OF THE CST.
CONTINUED EWD MOTION OF TROUGH WILL STEEPEN MID LEVEL LAPSE
RATES OVER REGION...ESPECIALLY FROM LAX NWD. COUPLED WITH LARGE
SCALE LIFT ASSOCIATED WITH THE TROUGH IN CNTRL CA...AND VORT MAX
APPROACHING THE S CST...SETUP LIKELY WILL YIELD SCTD CONVECTION/
ISOLD STORMS BY AFTN. RELATIVELY DRY LOW LVL ENVIRONMENT WILL KEEP
INSTABILITY WEAK...DESPITE LIFT AND MID LVL CAA. SLIGHTLY GREATER
INSTABILITY SHOULD DEVELOP OVER CSTL SECTIONS...WHERE UPSLOPE FLOW
WILL ALSO BE PRESENT TO ASSIST DEVELOPMENT. OVERALL COVERAGE OF
ONSHORE STORMS SHOULD REMAIN LIMITED GIVEN MARGINAL THERMODYNAMIC
ENVIRONMENT...ALTHOUGH LOW FREEZING LVLS SUGGEST POSSIBILITY FOR
GRAUPEL/SMALL HAIL IN A FEW SPOTS.
..CORFIDI.. 02/05/2009
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