SWODY2
SPC AC 291707
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1107 AM CST THU NOV 29 2007
VALID 301200Z - 011200Z
..NO SVR TSTM AREAS FORECAST...
..SYNOPSIS...
IN RESPONSE TO A STRONG RIDGE BUILDING ALOFT FROM THE ERN PAC INTO
AK...DOWNSTREAM JET ENERGY EVOLVING OVER BRITISH COLUMBIA WILL DIG
SWD ALONG THE WEST COAST ON FRIDAY. AS A RESULT...THE CUT-OFF UPR
LOW SEVERAL HUNDRED MILES W OF BAJA CALIFORNIA WILL EJECT NEWD AND
PHASE WITH THE NRN STREAM OVER THE SWRN STATES BY FRI NIGHT/EARLY
SATURDAY. MEANWHILE...DOWNSTREAM...BROAD CYCLONIC FLOW WILL BE
MAINTAINED OVER THE NERN TIER OF THE COUNTRY WITH THE SUB-TROPICAL
RIDGE WEAKLY BUILDING NWD INTO THE SRN STATES.
..CNTRL/SRN AZ...
THE MID-UPR TROPOSPHERE WILL RAPIDLY MOISTEN AS LARGE SCALE FORCING
FOR ASCENT ASSOCD WITH THE EJECTING UPR LOW SPREADS ACROSS THE
REGION FRIDAY AND FRIDAY NIGHT. THIS WILL LIKELY RESULT IN
WIDESPREAD PCPN DEVELOPING WITH UPSLOPE ENHANCEMENTS ALONG THE RIM
COUNTRY. EMBEDDED TSTM PROBABILITIES WILL INCREASE PRIMARILY FRIDAY
NIGHT AND EARLY SATURDAY AS THE STRONGEST ASCENT AND IMPROVING LAPSE
RATES ALOFT PASS OVERHEAD. STRONGER TSTMS WILL LIKELY BE CONFINED
TO AREAS OF SCNTRL/SERN AZ. ATTM...SVR WEATHER IS NOT EXPECTED
GIVEN THE LIMITED INSTABILITY/BUOYANCY.
.RACY.. 11/29/2007
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