AREA FORECAST DISCUSSION
NWS SEATTLE WA
AFDSEW 845 AM PDT THU SEP 9 1999
WK UPR LVL TROF WL MOV OVR W WA TODAY WITH ONLY SUBTLE EFFECTS. FNTL
CLOUDS WL AFFECT SEATTLE NWD TODAY AND ONLY THROUGH EARLY AFTN. SOME
LOW ST MADE IN TO BREMERTON AND SHELTON THIS MORNING AND NONE THROUGH
THE STRAIT JDF BUT MULTI-SPECTRAL SAT IMGRY SHOWS S SOUND STUFF
MIXING OUT RAPIDLY. THUS MSTLY SUNNY THIS AFTN. NEAR 70 MAX FOR KSEA
LOOKS GOOD. MORNING 850 MB TEMPS FM ACARS DATA NR MDL FCSTS AT 13C
AND SHOULD COOL TO NR 10C THIS AFTN IN NWLY CD ADVECTION. ONSHORE IS
FLOWING NICELY WITH W 30KT AT RACE ROCKS AND 17KT AT SMITH IS...WL
CONTRIBUTE TO COOLING TODAY AS WELL AS ADD MSTR TO BOUNDARY LAYER FOR
MORE WIDESPREAD LOW CLOUDS FRI MORNING. WL SPRUCE UP TNGT AS WELL AS
THIS AFTN AS LITTLE IF ANY HIGH CLDS UPSTREAM WL REACH US OVERNIGHT.
MEDIUM RANGE MODELS ARE STILL SHOWING DIFFERENCES IN HANDLING THE
TROUGHING OVER THE NE PACIFIC...BUT SEEM TO BE IN TUNE WITH STEADILY
PROGRESSING THE UPR RDG WHICH WILL BUILD OFSHR THE PAC NW ON FRI...
OVR MT ON TUE. ALSO SIGNIFICANT IS MAINTAINING THE MAIN JETSTREAM UP
OVR NRN/CNTRL B.C. ON TUE...AND AWAY FROM WA. OVR PAST 3 DAYS MRF
ALSO SEEMS TO BE TRENDING MORE TOWARD ECMWF SOLN. SUMMER WEATHER
SEEMS TO BE BATTLING TO STICK AROUND. KAM
UIL 110 SEA 000 OLM 000
.KATX...DOWN. EL TECH ON SITE.
.SEW...GALE WARNING STRAIT OF JUAN DE FUCA
SCA COASTAL WATERS