SPC AC 071622
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1022 AM CST SAT NOV 07 2009
VALID 071630Z - 081200Z
...NO SVR TSTM AREAS FORECAST...
...WRN PARTS OF WA/OREGON...
STRONG WESTERLY FLOW IS FORECAST TO CONTINUE FROM THE ERN PACIFIC
ACROSS THE NRN PACIFIC COAST AS AN UPPER LOW PERSISTS OVER THE GULF
OF AK. A SERIES OF SHORT WAVE TROUGHS EMBEDDED WITHIN THE MEAN FLOW
ARE MOVING RAPIDLY EWD FROM THE PACIFIC ACROSS WA AND OREGON...WITH
ONE SYSTEM MOVING INLAND ATTM AND AN UPSTREAM SYSTEM FORECAST TO
MOVE ONSHORE LATE THIS AFTERNOON AND EVENING. COLD TEMPERATURES
ALOFT AND ATTENDANT STEEP LAPSE RATES THROUGH APPROXIMATELY 400 MB
ARE RESULTING IN WEAK INSTABILITY WITH MUCAPE AOB 400 J/KG. SEVERAL
PERIODS OF ISOLATED THUNDERSTORMS ARE EXPECTED TO MOVE ONSHORE TODAY
THROUGH THE EVENING HOURS IN ASSOCIATION WITH THE ENHANCED DYNAMIC
FORCING FOR ASCENT ACCOMPANYING THE EWD MOVING SHORT WAVE TROUGHS.
..WEISS/JEWELL.. 11/07/2009
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z
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