SWODY1
SPC AC 221906
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0106 PM CST THU JAN 22 2009
VALID 222000Z - 231200Z
...NO TSTM AREAS FORECAST...
...SRN CA THROUGH SRN AZ...
A LARGE PLUME OF MID-UPPER LEVEL SUBTROPICAL MOISTURE CONTINUES
SPREADING NWD THROUGH THE WRN U.S. AHEAD OF A SHORTWAVE TROUGH JUST
OFF THE COAST OF SRN CA AND NRN BAJA. THE 12Z OBSERVED AND FORECAST
RUC SOUNDINGS INDICATE 6-6.5 C/KM LAPSE RATES AND WEAK CAPE (AOB 200
J/KG) IN THE 700-500 MB LAYER. ASCENT DOWNSTREAM OF THE APPROACHING
SHORTWAVE TROUGH WITHIN THE MOIST...WEAKLY CAPPED UNSTABLE LAYER
ALOFT WILL PROMOTE AREAS OF ELEVATED CONVECTION FROM SRN CA THROUGH
AZ INTO TONIGHT. ISOLATED LIGHTNING STRIKES REMAIN POSSIBLE WITH
THIS ACTIVITY...BUT IT APPEARS THE MARGINAL THERMODYNAMIC PROFILES
WILL NOT SUPPORT MORE THAN VERY SPARSE COVERAGE.
..DIAL.. 01/22/2009
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