556 FXUS66 KLOX 300408 AFDLOX SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 910 PM PDT MON APR 29 2002 UPPER LOW CONTINUES TO SPIN NEAR SAN FRANCISCO. VERY WEAK DYNAMICS FORECAST TO SWING AROUND THE SOUTHERN SIDE OF THE LOW CROSSING THE CENTRAL COAST LATE TONIGHT AND THE REST OF THE SOUTHLAND ON TUESDAY. 00Z MESOETA HINTS AT THE THE BEST CHANCE FOR PRECIP OVER LOCAL AREA... STILL NOT THAT GOOD...AS TIGHT AND WEAKENING BAND OF OMEGAS IS FORECAST TO BE OVER LA COUNTY BY 00Z/WED. NOT IMPRESSED WITH SYSTEM...NEVER HAVE BEEN...AND HAVE WATCHED OVER THE LAST FOUR FORECAST SHIFTS/DAYS AS EACH MODEL RUN HAS ADVERTISED A WEAKER SCENERIO. PREVIOUS SHIFT BACKED OUT OF MOST PRECIPITATION EXCEPT SLIGHT CHANCES ON TUESDAY...ESPECIALLY OVER MOUNTAINS. WITH SOME MOISTURE IN PLACE AND INEVITABLE LIFT SWINGING AROUND ASSOCIATED UPPER LOW WILL NOT TAKE THE LAST STEP AND RIP ALL PRECIPITATION OUT OF FORECAST...AND WILL LEAVE CURRENT PACKAGE AS IS. COULD BE A SPRINKLE OVER THE NEXT COUPLE HOURS ALONG CENTRAL COAST AS SMALL BAND OF LOW CLOUDS MOVES INLAND...APPARENTLY LINKED TO A WEAK BAND OF OMEGAS AS INDICATED ON THE MESOETA. BAND DOES NOT APPEAR TO BE MARINE LAYER RELATED...RATHER SYNOPIC IN NATURE...AND THUS WILL LEAVE PARTLY CLOUDY AS FORECAST FOR CENTRAL COAST OVERNIGHT...HOWEVER VARIABLE CLOUDINESS MAY BE A BETTER FORECAST. NO CHANGES NECESSARY TO LATTER PERIODS AS MODELS COONTINUE TO ADVERTISE ONSHORE FLOW WITH A BAGGY RELATIVELY DRY TROF OVER WESTERN U.S. LAX 0000. MCCLUNG .LOX...NONE.