Forecast Discussions mentioning ACARS, received at FSL on 06/10/99

...SYNOPSIS... FAIR WEATHER WILL CONTINUE ACROSS SOUTHWEST CALIFORNIA THROUGH FRIDAY. A WEAK COASTAL EDDY WILL BRING NIGHT AND MORNING LOW CLOUDS TO THE COASTS AND INLAND VALLEYS...BUT SKIES SHOULD BE MOSTLY SUNNY DURING DAYTIME HOURS.

...DISCUSSION... EXCEPT FOR MARINE LAYER CLOUDS BEING SLOW TO CLEAR OUT OF FULLERTON TODAY...CLEARING PATTERN IS A RERUN OF TUESDAY. ACARS SOUNDING SHOWING A RISE TO INVERSION TO 2900 FT. ONSHORE GRADIENT AT 20Z 7 MB SAN-IPL.

ALL MODELS CONTINUE MEAN BROAD TROUGH WITH A SERIES OF WEAK VORT MAXES TO SWING THROUGH CA INTO FRI...BUT HEIGHTS REMAIN HIGH IN SOCAL SO DO NOT EXPECT MUCH VARIATION TO DEPTH OF MARINE LAYER. ONSHORE GRADIENTS STAY THE SAME FOR THU...THEN WEAKEN A BIT BY FRI. THIS WILL MEAN LESS EXTENSIVE CLOUDINESS THU NIGHT/FRI MORN. TEMPS WILL INCREASE VERY LITTLE IF ANY THU...THEN A FEW DEGREES MORE FRI... ESPECIALLY INLAND.

A NEW ZEALAND STORM LAST WEEK SPUN OFF SOME LARGE SWELL THAT ARRIVED IN SOCAL TUESDAY. IT WILL CONTINUE...DECREASING LATE THU.

EXTENDED MODELS DEVELOP DEEP UPPER LOW AT 140W LON WEST OF SEATTLE OVER THE WEEKEND...THEN MOVE IT NORTHWARD INTO GULF OF ALASKA AS WEST U.S. HIGH RETROGRADES. IT WILL BE HOT INLAND AND DESERTS...ESPECIALLY EARLY NEXT WEEK. BY SUN/MON TEMPS WILL BE AROUND 110 IN TRM...MID 90S INLAND EMPIRE...70S AND 80S NEAR THE COAST. BY NEXT WED MRF SHOWS A 4 CORNERS HIGH WHICH WOULD DRAW MOISTURE FROM MEXICO INTO SW U.S. COULD GET SOME TSTORMS IN MTNS AND DESERTS THEN.

SAN 0000

.SAN...HIGHER THAN NORMAL SURF ORANGE AND SAN DIEGO COUNTIES... (SEE LAXMWSSAN).

MKM

VISIBLE SATELLITE IMAGERY INDICATING EDDY PATTERN IN PROGRESS THIS MORNING...AS LOW CLOUDS HAVE SURGED INTO VTU COUNTY FROM THE EAST. LATEST ACARS SOUNDINGS INDICATING MARINE LAYER DEPTH BETWEEN 3500 AND 3800 FEET...WITH INVERSION SLIGHTLY STRONGER THAN YESTERDAY. WITH THIS IN MIND...CLEARING ACROSS VALLEY AREAS MAY BE A BIT SLOWER THAN YESTERDAY...BUT STILL SHOULD SEE MOSTLY SUNNY SKIES IN MOST AREAS THIS AFTERNOON.

WITH CONSIDERABLE MARINE INFLUENCE INTO VALLEYS THIS MORNING AND SLOW BURNOFF EXPECTED...ANOTHER FAIRLY COOL DAY EXPECTED ACROSS VALLEYS TODAY. SLIGHTLY HIGHER HEIGHTS SHOULD ALLOW FOR LESS MARINE INFLUENCE INTO THE VALLEYS ON FRIDAY AND SATURDAY. THIS IN COMBINATION WITH GRADUAL RISE IN BOUNDARY LAYER TEMPERATURES...SHOULD ALLOW FOR GRADUAL WARMING TREND FRIDAY/SATURDAY ACROSS INLAND AREAS.

NO UPDATES PLANNED AT THIS TIME.

LAX 000. GOMBERG/HENDERSON

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

BACK DOOR FRONT CONTINUES TO SLOWLY MOVE TO THE S AS IT APPEARS TO BE LAYING NEAR A KRZZ TO 10 MI NORTH OF KHSE. VWP AND SOUNDINGS FROM MHX/AKQ SHOWING EASTERLY FLOW IS DOMINATE AT AKQ BUT HAS NOT MADE IT TO MHX. SFC ANALYSIS SHOWS JUST HOW WEAK BOUNDARY BUT VISIBLE IMAGERY SHOWS LOW CLOUDS ALONG THE LEADING EDGE OF THE FRONT.

MORNING SOUNDINGS CONTINUE TO SHOW MOISTURE IS LIMITED WITH CHS SHOWING MOST OF THE MOISTURE BETWEEN 650 AND 500 MB AND THE MAIN CONCENTRATION OF MOISTURE TO THEIR SOUTH. ALSO THIS MORNING SOME CONVECTION IS SEEN WEST OF CHESTERFIELD COUNTY AND IT WNW MOVEMENT MATCHES WELL WITH THE 850-700 MB WINDS. AS MENTIONED IN THE PREVIOUS DISCUSSION MOISTURE IS THE LACKING INGREDIENT WITH SOME LOW LEVEL LIFT SUPPLIED BY AFTERNOON HEATING AND THE PROGRESSION OF THE BACK DOOR FRONT. BUT LATEST VSBY SATL DOES SHOW A SWATH OF OF MOISTURE MOISTURE RUNNING ALONG THE SC/NC BOUNDARY AND STRETCHES BACK TO THE WEST. AS AS USUAL THIS MOISTURE IS CONVENIENTLY LOCATED BETWEEN ALL THE NWS SOUNDINGS AND WILL HAVE TO INVESTIGATE THE SATL AND AIRCRAFT SOUNDINGS TO SEE IF THIS FEATURE IS BEING INTRODUCED IN TO THE MODELS.

SO WILL NOT MAKE DRASTIC CHANGES IN THE UPDATE BUT WILL PUSH ISOLATED TRW TO SLGT CHC MAINLY OVER SC PORTION OF CWA.

CWF...NO MAJOR CHANGES PLANNED.

.ILM...NONE.

HAWKINS