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000 FXUS66 KEKA 202250 AAA AFDEKA AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE EUREKA CA 350 PM PDT SAT SEP 20 2008 .SYNOPSIS...COOL WEATHER WILL PREVAIL OVER THE INTERIOR THROUGH SUNDAY WITH NIGHT AND MORNING CLOUDS AND FOG CONTINUING NEAR THE COAST. WEAK HIGH PRESSURE WILL BRING A WARMING TREND TO INLAND LOCATIONS BEGINNING MONDAY. && .SHORT TERM...MOISTURE LEFTOVER FROM YESTERDAY`S UPPER LOW HAS BEEN SUFFICIENT TO PRODUCE CU BUILDUPS OVER THE HIGHER TERRAIN TODAY. CLEARING SKIES WILL LEAD TO A COLDER NIGHT OVER THE INTERIOR TONIGHT. A WEAK TROUGH WILL PASS THROUGH THE PACIFIC NORTHWEST LATE SUNDAY...BUT WILL BRING LITTLE CHANGE TO THE WEATHER OTHER THAN INCREASED CLOUD COVER IN THE NORTHERN PORTION OF THE CWA. WEAK RIDGING WILL BUILD OVER THE EASTERN PACIFIC EARLY NEXT WEEK AND BRING A WARMING AND DRYING TREND TO INLAND AREAS BEGINNING MONDAY. KL .LONG TERM...WEDNESDAY THROUGH SATURDAY...THE WEAK UPPER RIDGE OVER THE WEST COAST ON TUESDAY WILL SHIFT EASTWARD TUESDAY NIGHT IN RESPONSE TO AN APPROACHING UPPER TROUGH. THIS TROUGH FORECAST TO CROSS 130 W LATITUDE BY 1200 UTC WEDNESDAY. THIS FEATURE IS FORECAST TO WEAKEN AS IT APPROACHES THE COAST...HOWEVER STILL APPEARS TO HAVE SUFFICIENT MOISTURE TO PRODUCE A CHANCE OF LIGHT RAIN OVER THE NORTHWEST CWA WEDNESDAY AFTERNOON. THE MEDIUM RANGE MODELS AGREE FAIRLY WELL ON THE STRENGTH AND TIMING OF THIS FEATURE...FOLLOWED BY REASONABLE AGREEMENT IN DEPICTING SHORT WAVE RIDGING FOR THE REGION THURSDAY AND FRIDAY AHEAD OF ANOTHER TROUGH FOR LATE FRIDAY INTO SATURDAY. CMC && .AVIATION...WITH LIGHT WINDS ACROSS THE FORECAST AREA...SCT-BKN CLOUDS ACROSS THE FORECAST AREA WILL BE SLOW TO SCATTER THIS EVENING. ALTO CU OVER MOUNTAINS SHOULD CLEAR SHORTLY AFTER SUNSET. NW WINDS OFFSHORE WILL INCREASE THIS AFTERNOON AND CONTINUE TO CLEAR CLOUDS ALONG THE NORTH COAST FROM THE COAST INWARD. HOWEVER EXPECT LOW CLOUDS AND MVFR FLIGHT CONDITIONS ALONG THE NORTH COAST LATE TONIGHT. TH && .MARINE...N-NW WINDS WILL INCREASE SUN AND MON AS HIGH PRESSURE BUILDS OVER THE EAST PACIFIC. WINDS ARE EXPECTED TO INCREASE TO SCA LEVELS OVER THE SOUTHERN OUTER WATERS SUNDAY. MODELS ARE BETTER ALIGNED ON THE TIMING OF THE WEAK FRONT THAT WILL JUST CLIP THE NORTHERN WATERS. THE PRESSURE GRADIENT WILL WEAKEN AS THE FRONT NEARS TUE NIGHT...AND STRENGTHEN BEHIND THE FRONT ON THU. TH && .EKA WATCHES/WARNINGS/ADVISORIES...NONE. && $$ VISIT US AT HTTP://WWW.WEATHER.GOV/EUREKA