Forecast Discussions mentioning ACARS, received at FSL on 05/10/00

...SYNOPSIS... A TROUGH OF LOW PRESSURE MOVING INLAND ALONG THE WEST COAST WEDNESDAY AND THURSDAY WILL BRING A COOLING TREND TO SOUTHWEST CALIFORNIA WITH MORE EXTENSIVE NIGHT AND MORNING LOW CLOUDS AND FOG WEST OF THE MOUNTAINS AND BREEZY CONDITIONS IN THE MOUNTAINS AND DESERTS. LITTLE CHANGE THROUGH WEEKEND AS LOW PRESSURE LINGERS ALONG THE WEST COAST.

...DISCUSSION... COAMPS/RUC/ETA ALL FORECAST A CSTL EDDY TONIGHT WITH COAMPS SHOWING CIRC PERSISTING ALG THE S CST ALL DAY WED. ACARS SOUNDINGS SHOW THE BASE OF THE MARINE INVERSION GENERALLY 1500 TO 2000 FT. NO UPDATES ARE PLANNED FOR THE CURRENT PACKAGE. THE MID SHIFT MAY WANT TO REEVALUATE A NUMBER OF ITEMS WITH THE NEXT ROUTINE ISSUANCE AT 330 AM. HIGH TEMPERATURES IN THE MTNS...GIVEN THE AMOUNT OF COOLING FORECAST BY THE MDLS...HIGH TEMPERATURES IN THE MTNS SHOULD BE AROUND 5 DEGREES COOLER WED AND THU THAN SHOWN IN THE CURRENT FORECAST. SLOW CLEARING FOR THE BEACHES WED...LOW CLOUDS LINGERED NR SOME BEACHES OF ORANGE AND SAN COUNTIES TODAY. WITH COAMPS SHOWING THE EDDY THAT DEVELOPS TONIGHT PERSISTING ALL DAY WED (I.E. ... NOT DECAYING DURG THE DAY) AND WITH COAMPS ALSO SHOWING THE MARINE LYR DEEPENING DURG THE DAY WED...OPPOSITE THE NORMAL DIURNAL CYCLE...CLRG AT THE BEACHES FOR WED COULD BE EVEN SLOWER THAN TODAY. LOW CLOUDS WL LIKELY BE MORE EXTENSIVE FOR WED NIGHT AND THU W OF THE MTNS THAN SHOWN IN SHOWN IN THE CURRENT PACKAGE WITH ONLY PARTIAL AFTERNOON CLRG OR PARTLY CLOUDY AFTERNOON CONDITIONS W OF THE MTNS THU AFTERNOON. BY THU NIGHT INTO FRI...LWR LVL COOLING SHOULD ERODE MUCH OR ALL OF THE MARINE INVERSION. THE NEXT SHIFT WANT MAY TO TRIM BACK LOW CLOUD/FOG WORDING FOR THIS PD TO PARTLY CLOUDY.

SAN 0011

.SAN...NONE.

MARTIN

LOTS OF ACTIVITY ON THE SATELLITE IMAGERY TONIGHT. OCCLUDED FRONT OVER SOUTHERN BRITISH COLUMBIA WITH DEFORMATION LIKE FEATURE HANGING OVER NORTHWESTERN WA. ONE VORT MAX OFFSHORE NEAR 46N/130W WITH ANOTHER ONE NEAR 52N/132W. JET CONTINUING TO DIG SOUTHWARD AND IS NOW BACK ALONG 40N. BOTH VORT MAXS WILL DIG SOUTH TODAY WITH THE ONE CURRENTLY NEAR THE QUEEN CHARLOTTES DROPPING DOWN TO NEAR THE SAME LOCATION AS THE ONE CURRENTLY OFF THE COAST BY THIS AFTERNOON. THIS WILL KEEP MORE SHOWER ACTIVITY ALONG THE COAST AND OVER NORTHERN OREGON BUT WITH AIR MASS VERY UNSTABLE WITH 500 MB TEMPS NEAR -30 ...LIFTED INDEXES BELOW 0...POPS OVER ALL OF WESTERN WASHINGTON STILL HIGH. MODELS CONSISTENT IN BRINGING NEXT CLOSED CIRCULATION DOWN THE BACK SIDE OF THE TROUGH ALONG THE WEST COAST WITH THE UPPER LOW ABOUT 400 NM W OF KUIL BY THURSDAY AFTERNOON. WILL SCALE BACK POPS FOR THE INTERIOR SECTIONS BUT WITH AIR MASS STILL VERY UNSTABLE AND A LITTLE DIFFLUENCE ALOFT ADDED IN WILL KEEP POPS IN THE LIKELY CATEGORY. LITTLE CHANGE TO CURRENT PACKAGE. ACARS SOUNDINGS AND AVALANCHE UNIT OBSERVATIONS SHOW FREEZING LEVEL OVER THE CASCADES BETWEEN 3500 AND 4000 FEET. WILL CONTINUE SPS FOR SNOW AMOUNTS BELOW ADVISORY CATEGORY TODAY. .EXTENDED...MRF AND CANADIAN LOOKING MORE LIKE EURO LAST NIGHT WITH UPPER LEVEL LOW REMAINING WEST OF CALIFORNIA OVER THE WEEKEND INSTEAD OF MOVING INLAND. LOW STILL NOT FAR ENOUGH SOUTH ON SATURDAY TOO KEEP WHOLE AREA OUT OF SHOWER THREAT BUT BY SUNDAY NORTHERLY SURFACE GRADIENTS OVER WESTERN WASHINGTON AND UPPER LEVEL LOW NOW NEAR KSFO. WILL TAKE SHOWERS OUT OF THE FORECAST SUNDAY. TEMPS STILL NEAR OR BELOW NORMAL. FELTON

UIL 987 SEA 866 OLM 866

.KATX...VCP21/CSR21...OPERATIONAL.

.SEW...SCA ALL WATERS EXCEPT ADMIRALTY INLET. N