Forecast Discussions mentioning ACARS, received at FSL on 06/12/99

MAIN WEATHER STORY THIS WEEKEND WILL BE WARMING TREND ACROSS INLAND AREAS. 00Z SOUNDINGS AND LATEST ACARS SOUNDINGS INDICATING MARINE LAYER DEPTH SHRINKING DOWN TO 1500 FEET WITH VERY STRONG INVERSION FORMING. AS A RESULT...LOW CLOUDS AND FOG SHOULD MAINLY BE CONFINED TO COASTAL AREAS TONIGHT...BUT SOME COULD SNEAK INTO THE LOWER VALLEYS LATE. ALSO WILL HAVE TO WATCH FOR SOME LOCALLY DENSE FOG TONIGHT IN THE VALLEYS AS WELL AS THE CENTRAL COAST. COMBINATION OF GOOD ONSHORE FLOW AND LOW/STRONG INVERSION SHOULD KEEP SOME LOW CLOUDS NEAR THE IMMEDIATE COAST SATURDAY AFTERNOON.

WITH MARINE LAYER SHRINKING AND 850MB/BOUNDARY LAYER TEMPERATURES INCREASING...LOOK FOR ALL INLAND AREAS TO WARM CONSIDERABLY ON SATURDAY WHILE THE IMMEDIATE COAST WILL SEE VERY LITTLE WARMING. ON SATURDAY NIGHT AND SUNDAY...THE LOW LEVEL FLOW TURNS MORE NORTHWESTERLY WHICH SHOULD DECREASE STRATUS COVERAGE EVEN FURTHER. BY SUNDAY...SHOULD SEE ADDITIONAL WARMING IN ALL AREAS...WITH SOME OF OUR VALLEYS REACHING OVER 90 DEGREES.

DO EXPECT GALE FORCE WINDS TO RETURN TO PORTIONS OF THE OUTER WATERS SATURDAY NIGHT AND SUNDAY. SUNDOWNER WINDS SHOULD ALSO RETURN TO SOUTHERN SBA COUNTY SATURDAY EVENING...INCREASING TO ADVISORY LEVELS ON SUNDAY EVENING. DUE TO WARMING IN BOUNDARY LAYER...THIS SUNDOWNER EPISODE LIKELY TO BRING VERY WARM TEMPERATURES ON SUNDAY/MONDAY TO PORTIONS OF SOUTHERN SBA COUNTY. CONTINUED WARM INLAND ON MONDAY/TUESDAY...WITH SOME COOLING IN ALL AREAS ON WEDNESDAY AS UPPER TROUGH DEVELOPS OVER CALIFORNIA.

LAX 0000. GOMBERG.

.LAX...SMALL CRAFT ADVISORY...SEE LAXCWFLAX.

SATELLITE/SURFACE OBS INDICATE MOSTLY SUNNY SKIES ACROSS THE AREA THIS AFTERNOON...WITH THE USUAL AFTERNOON BREEZES OVER THE DESERTS. ONLY EXCEPTION IS VENTURA COUNTY BEACHES WHERE THE LOW CLOUDS ARE HANGING TOUGH. LATEST ACARS DATA INDICATING MARINE LAYER BASES AROUND 2200 FEET.

12Z MODELS ALL VERY SIMILAR NEXT COUPLE OF DAYS...BUILDING UPPER RIDGE OVER THE DISTRICT. WITH BUILDING UPPER RIDGE...MARINE LAYER DEPTH WILL SHRINK NEXT COUPLE OF DAYS...DESPITE CONTINUED ONSHORE FLOW. WILL INDICATE GRADUAL DECREASE IN AREAL COVERAGE OF STRATUS AND FOG NEXT COUPLE OF DAYS. FOR TONIGHT...DESPITE SHRINKING EFFECT OF UPPER RIDGE...THINK MARINE LAYER WILL REMAIN DEEP ENOUGH TO PRODUCE AREAS OF STRATUS/FOG ACROSS THE LA VALLEYS BY MORNING. HOWEVER...BY SATURDAY NIGHT...EXPECT MARINE LAYER TO BE SHALLOW ENOUGH TO KEEP STRATUS/FOG OUT OF ALL VALLEY AREAS. OTHERWISE...WILL EXPECT MOSTLY CLEAR SKIES ACROSS THE DISTRICT THROUGH SUNDAY...WITH ONLY THE OCCASIONAL CIRRUS CLOUD FLOATING OVERHEAD.

AS FOR TEMPS...BUILDING UPPER RIDGE AND SHRINKING MARINE LAYER WILL ALLOW FOR NICE WARMUP ACROSS THE DISTRICT...ESPECIALLY INLAND AREAS. SHOULD BE A BEAUTIFUL WEEKEND...WITH SUNDAY BEING THE WARMEST DAY.

LAX 0000. THOMPSON.

.LAX...SMALL CRAFT ADVISORY...SEE LAXCWFLAX.

LATEST SATELLITE SHOWS STRATUS/FOG COVERAGE SOMEWHAT LESS THAN FRIDAY MORNING...AS EXPECTED. CURRENT SOUNDINGS/ACARS DATA INDICATE MARINE LAYER HAS SHRUNK DOWN TO AROUND 1500 FEET. WITH SHALLOWER MARINE LAYER...STRATUS/FOG SHOULD BURN OFF NICELY EXCEPT AT THE IMMEDIATE COAST WHERE SOME STRATUS MAY HANG TOUGH. OTHERWISE...EXPECT MOSTLY SUNNY SKIES TODAY FOR THE DISTRICT.

AS FOR TEMPS...MORNING PROFILERS SHOW GOOD AMOUNT OF WARMING IN THE BOUNDARY LAYER. WARMING BOUNDARY LAYER...COMBINED WITH LESS MARINE LAYER COVERAGE...SHOULD PRODUCE NOTICEABLE WARMUP TODAY...ESPECIALLY IN THE VALLEYS.

CURRENT SBA-SMX GRADIENT RUNNING ABOUT 2 MB MORE OFFSHORE THAN FRIDAY MORNING. THEREFORE...WILL DEFINATELY HAVE TO WATCH POSSIBLE SUNDOWNER DEVELOPMENT LATE THIS AFTERNOON AND EVENING.

OVERALL...CURRENT ZONES HAVE EXCELLENT HANDLE ON THE ABOVE POINTS. THEREFORE...DO NOT PLAN TO UPDATE AT THIS TIME.

LAX 000. THOMPSON.

.LAX...GALE WARNING/SMALL CRAFT ADVISORY...SEE LAXCWFLAX.