SWODY2
SPC AC 230549
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1149 PM CST THU JAN 22 2009
VALID 241200Z - 251200Z
...NO SVR TSTM AREAS FORECAST...
...LWR MS VLY...
SLIGHT DEEPENING OF THE ERN TROUGH ON FRI WILL SEND A CDFNT SWD INTO
CNTRL PARTS OF AL...MS AND LA BY 12Z SATURDAY. THE FRONT WILL
BECOME QSTNRY BY AFTN AS PRIMARY NRN STREAM IMPULSE EJECTS INTO NEW
ENGLAND. WSW FLOW ALOFT WILL MAINTAIN WEAK WARM ADVECTION ATOP THE
SHALLOW FRONTAL ZONE IN THE 12-18Z/24 TIME FRAME FROM CNTRL/NRN LA
INTO CNTRL MS. THIS WILL SUPPORT CONSIDERABLE CONVECTION WITH WDLY
SCTD TSTMS...PRIMARILY SATURDAY MORNING.
...GRT BASIN...
SPLIT UPR FLOW REGIME WILL UNDERGO PHASING ON SATURDAY AS A STRONG
NRN STREAM JET STREAK DIGS TOWARD THE PAC NW. THIS WILL FORCE THE
UPR TROUGH...CURRENTLY OFF THE NRN CA CST...INLAND INTO THE GRT
BASIN REGION PRIOR TO THE ARRIVAL OF STRONGER HEIGHT FALLS LATER IN
THE WEEKEND. PLUME OF E PAC MOISTURE WILL ACCOMPANY THE LEAD
WAVE...AND RESIDENT STEEP LAPSE RATE ENVIRONMENT WILL BE FAVORABLE
FOR CONSIDERABLE CONVECTION. ISOLD TSTMS WILL BE PSBL...BUT GIVEN
WEAK LARGER SCALE UVV EXPECTED ON SATURDAY...PROBABILITIES WILL
LIKELY BE LESS THAN 10 PERCENT.
..RACY.. 01/23/2009
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