[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 091620
SWODY1
SPC AC 091618

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1018 AM CST SAT DEC 09 2006

VALID 091630Z - 101200Z

...NO SVR TSTM AREAS FORECAST...

SATELLITE IMAGERY AND MODEL GUIDANCE SHOW NEXT IN A SERIES OF STRONG
SHORTWAVE TROUGHS APPROACHING THE PACIFIC COAST.  THIS FEATURE IS
FORECAST TO MOVE ASHORE TONIGHT...PROVIDING STRONG ASCENT AND
WIDESPREAD PRECIPITATION TO NORTHERN/CENTRAL CA AND PARTS OF
SOUTHERN ORE.  COLD TEMPERATURES ALOFT AND RELATIVELY STEEP MID
LEVEL LAPSE RATES ARE EXPECTED TO RESULT IN POCKETS OF MARGINAL
INSTABILITY OVERNIGHT.  COMBINATION OF LARGE SCALE FORCING FOR
ASCENT AND OROGRAPHIC FORCING WILL AID IN THE THREAT OF ISOLATED
THUNDERSTORMS ACROSS THE REGION.  NO SEVERE THUNDERSTORMS ARE
ANTICIPATED.

ELSEWHERE ACROSS THE NATION...RELATIVELY DRY/STABLE CONDITIONS ARE
EXPECTED TO PRECLUDE THUNDERSTORM ACTIVITY.

..HART.. 12/09/2006