SWODY1
SPC AC 261606
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1006 AM CST WED NOV 26 2008
VALID 261630Z - 271200Z
...NO SVR TSTM AREAS FORECAST...
...SRN CA ACROSS THE LOWER CO RIVER VALLEY...
UPPER LOW JUST OFF THE SRN CA COAST THIS MORNING APPEARS TO BE
COMPOSED OF TWO SEPARATE VORT LOBES...ONE EJECTING INLAND ACROSS SRN
CA AND ANOTHER STILL DIGGING SSEWD AROUND 32N/123W. LEADING IMPULSE
CONTINUES TO SUPPORT A FEW THUNDERSTORMS WITHIN BROADER MOIST
CONVECTIVE PLUME SPREADING NEWD INTO CENTRAL CA/SRN NV AND EWD INTO
CENTRAL AZ THIS MORNING. WITH MODEST HEATING IN WAKE OF THIS
ACTIVITY...EXPECT AREAS OF MARGINAL INSTABILITY WILL DEVELOP DURING
THE AFTERNOON AHEAD OF STRONG IMPULSE NOW OFF THE SRN CA COAST WHICH
WILL DRIVE MAIN UPPER LOW INLAND DURING LATTER HALF OF THE PERIOD.
/SRN CA COAST/
WILL LIKELY SEE LOW TOPPED CONVECTION INCREASE UNDER MID LEVEL COLD
POCKET OFF THE SRN CA COAST THROUGH THE DAY WITH ASSOCIATED RISK OF
BRIEF WATERSPOUTS/POSSIBLE TORNADOES ALONG AND JUST OFF THE
IMMEDIATE COAST AS LOW LEVEL LAPSE RATES STEEPEN. RISK OF SMALL
HAIL IS ALSO EXPECTED AS STRONGER CORES SPREAD INLAND ACROSS SRN CA
THROUGH THE EARLY/MID EVENING.
/LOWER CO RIVER VALLEY AND VICINITY/
A SEPARATE AREA OF STRONGER STORMS MAY FORM ACROSS THIS REGION LATER
TODAY AND THIS EVENING AS FORECAST SOUNDINGS YIELD FAVORABLE
ENVIRONMENT FOR A FEW ORGANIZED STORMS. MLCAPE MAY REACH 500 J/KG
THIS AFTERNOON WITH TEMPERATURES WARMING THROUGH THE MID 70S F AND
SURFACE DEW POINTS HOLDING IN THE 50S F. THE MORE INTENSE CORES
SHOULD BE CAPABLE OF HAIL/STRONG DOWNDRAFTS...WITH A FEW EVENTS NEAR
SEVERE LEVELS...AS STORMS INCREASE AND SPREAD EWD AND WEAKEN THROUGH
THE EVENING.
..EVANS/GRAMS.. 11/26/2008
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