SWODY1
SPC AC 201539
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0939 AM CST SAT NOV 20 2010
VALID 201630Z - 211200Z
...NO SVR TSTM AREAS FORECAST...
AN UPPER LOW OFF THE PACIFIC NW COAST WILL MOVE SWD INTO NRN CA BY
SUNDAY MORNING. A LEAD SHORTWAVE TROUGH OVER CNTRL/SRN COASTAL CA
WILL TRANSLATE EWD INTO THE SRN PORTIONS OF THE GREAT BASIN BY THIS
EVENING. AT THE SURFACE...A COLD FRONT WILL PUSH EWD THROUGH NV AND
SRN CA AND INTO THE LOWER CO RIVER VALLEY BY DAYBREAK SUNDAY. ISOLD
TSTM ACTIVITY APPEARS MOST PROBABLE NEAR AND OFFSHORE THE CNTRL CA
TO SRN ORE COAST DURING THE DAY AND THEN FARTHER INLAND INTO PARTS
OF CNTRL CA DURING THE LATTER HALF OF THE PERIOD AS STEEPENING MID
LEVEL LAPSE RATES /-25 TO -30 DEG C AT H5/ YIELD WEAK BUOYANCY.
FARTHER SE OVER THE CO RIVER VALLEY...INCREASING LARGE SCALE ASCENT
ATTENDANT TO THE APPROACHING UPPER TROUGH AND THE NOSE OF A MOISTURE
PLUME EMANATING FROM THE ERN PACIFIC MAY WORK IN CONCERT TO SUPPORT
A FEW THUNDERSTORMS MAINLY THIS EVENING INTO THE OVERNIGHT HOURS.
..SMITH.. 11/20/2010
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