SPC AC 270021
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0621 PM CST TUE DEC 26 2006
VALID 270100Z - 271200Z
...NO SVR TSTM AREAS FORECAST...
...SWRN OREGON/NRN AND CENTRAL CA...
UPPER VORTICITY MAX EVIDENT IN SATELLITE IMAGERY NEAR 41N/127W IS
EXPECTED TO MOVE ONSHORE INTO NRN CA TONIGHT. THE UPSTREAM RIDGE
HAS SHOWN SIGNS OF RAPID AMPLIFICATION INTO THE GULF OF AK WHICH
SUGGESTS THE CA SYSTEM WILL DIG SEWD AND AFFECT PARTS OF CENTRAL CA
BY THE END OF THE PERIOD.
LIGHTNING NETWORK HAS DETECTED BRIEF ISOLATED CG STRIKES IN THE WAKE
OF THE FRONTAL BAND ACROSS NWRN CA THIS AFTERNOON. COLDER
TEMPERATURES ALOFT/STEEPENING LAPSE RATES ACCOMPANYING THE VORTICITY
MAX WILL RESULT IN A MARGINALLY UNSTABLE ENVIRONMENT SPREADING
INLAND WITH FORECAST SOUNDINGS CONTAINING CAPE UP TO 200 J/KG.
LOW-TOPPED CONVECTION/ISOLATED THUNDERSTORMS WILL BE POSSIBLE
THROUGH TONIGHT AS THE SYSTEM MOVES ONSHORE.
..WEISS.. 12/27/2006
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z
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