411
FXUS66 KSEW 091049
AFDSEW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
249 AM PST SUN NOV 9 2025
SYNOPSIS
DRIER AND WARMER CONDITIONS WILL REMAIN INTO SUNDAY AS HIGH
PRESSURE BUILDS OVERHEAD. A WEAK SYSTEM WILL BRING LIGHT RAIN TO
THE REGION EARLY NEXT WEEK. A STRONGER AND WETTER SYSTEM IS
EXPECTED TO MOVE INTO THE PACIFIC NORTHWEST TOWARD THE END OF
NEXT WEEK.
SHORT TERM /TODAY THROUGH TUESDAY/
HIGH CLOUDS CONTINUE OVERHEAD AS AN UPPER-RIDGE PROGRESSES
ACROSS THE PNW. PATCHY FOG IS LESS WIDESPREAD COMPARED TO
YESTERDAY, DUE TO INCREASED OFFSHORE FLOW. EASTERLY GUSTS NEAR
THE FOOTHILLS HAVE BEEN BLOWING UPWARDS OF 40 MPH BUT WILL
DIMINISH BY LATE MORNING. ANY REMAINING FOG SHOULD BURN OFF
SHORTLY AFTER SUNRISE AS WELL. ONE LAST DRY DAY TODAY AS LARGE-
SCALE SUBSIDENCE BOOST HIGHS INTO THE UPPER 50S TO LOWER 60S.
THEN, A WEAK FRONT IS ON TAP TO ARRIVE TONIGHT INTO MONDAY WITH
A SHOT OF LIGHT RAINFALL ACROSS THE AREA. RAINFALL AMOUNTS LESS
THAN A 0.10" FOR MOST LOWLANDS BUT THE COAST AND NORTHERN
INTERIOR COULD SEE UPWARDS OF 0.25" OF PRECIP. HIGHER TOTALS ARE
SLATED FOR THE MOUNTAINS.
A FEW SHOWERS MAY LINGER MONDAY NIGHT BUT DRIER WEATHER IS
FAVORED ON TUESDAY. UPPER-LEVEL RIDGING IS SET TO RETURN AND
LAST INTO MIDWEEK. HIGHS WILL COOL DOWN TO SEASON VALUES WITH
TEMPERATURES IN THE MID TO UPPER 50S ON MONDAY AND LOWER TO MID
50S ON TUESDAY. OVERNIGHT LOWS ARE TO RANGE THROUGHOUT THE 40S.
LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/
ENSEMBLES ARE HINTING AT THE RIDGE AXIS SHIFTING EASTWARD
TUESDAY NIGHT INTO WEDNESDAY AS AN UPPER-TROUGH LOOMS OFFSHORE.
HERE, THE PATTERN WILL BEGIN TO REOPEN AS A DISTURBANCE BRINGS
WETTER WEATHER BY THURSDAY AND POSSIBLY CONTINUING INTO THE
WEEKEND. NEAR- SEASONAL TEMPERATURES ARE EXPECTED IN THE LONG-
TERM FORECAST.
AVIATION
UPPER LEVEL RIDGE OVER THE AREA WILL WEAKEN TODAY. WEAKENING
FRONT MOVING BY MAINLY TO THE NORTH TONIGHT AND MONDAY MORNING.
SOUTHWESTERLY FLOW ALOFT THROUGH MONDAY. IN THE LOWER LEVELS
OFFSHORE FLOW THIS MORNING BECOMING LIGHT THIS AFTERNOON AND
TONIGHT.
HIGH CLOUDS OVER THE AREA TODAY. INCREASING MIDDLE LEVEL CLOUDS
TONIGHT. CEILINGS LOWERING AFTER MIDNIGHT WITH MVFR CEILINGS BY
12Z. AREAS OF FOG REDUCING VISIBILITY BELOW A MILE OVER THE
SOUTHWEST INTERIOR AND SOUTHERN PUGET SOUND UNTIL 17Z.
KSEA...HIGH CLOUDS TODAY WITH SOME MIDDLE LEVEL CLOUDS TONIGHT.
MVFR CEILINGS DEVELOPING AROUND 12Z MONDAY. EAST WIND 4 TO 8
KNOTS BECOMING SOUTHERLY AROUND 20Z. FELTON
MARINE
HIGH PRESSURE OVER THE INLAND WATERS WILL WEAKEN TODAY. A
SPLITTING FRONT WILL MOVE THROUGH THE WATERS TONIGHT. HIGH
PRESSURE BUILDING OVER THE COASTAL WATERS MONDAY WILL WEAKEN
TUESDAY. NEXT FRONTAL SYSTEM MOVING SLOWLY THROUGH THE WATERS
WEDNESDAY NIGHT AND THURSDAY.
SMALL CRAFT ADVISORY EASTERLY WINDS CONTINUING AT THE WEST
ENTRANCE TO THE STRAIT OF JUAN DE FUCA THIS MORNING WILL EASE
THIS AFTERNOON.
SEAS IN THE OUTER COASTAL WATERS BUILDING TO 10 OR 11 FEET THIS
AFTERNOON. SEAS SUBSIDING UNDER 10 FEET MONDAY.
SMALL CRAFT ADVISORY WINDS WITH 10 FOOT SEAS POSSIBLE OVER THE
COASTAL WATERS WEDNESDAY INTO THURSDAY. FELTON
HYDROLOGY
THE NEXT WEATHER SYSTEM LATE TONIGHT WILL BRING
LIGHT RAIN TO THE OLYMPIC PENINSULA. CHANCES FOR HEAVIER RAIN
INCREASE TOWARDS THE END OF THE WEEK. NO NEW FLOODING IS
EXPECTED OVER THE NEXT 7 DAYS. FELTON
SEW WATCHES/WARNINGS/ADVISORIES
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 6 AM PST EARLY THIS MORNING FOR
WEST ENTRANCE U.S. WATERS STRAIT OF JUAN DE FUCA.
SMALL CRAFT ADVISORY FROM 1 PM THIS AFTERNOON TO 4 AM PST
MONDAY FOR COASTAL WATERS FROM CAPE FLATTERY TO JAMES
ISLAND 10 TO 60 NM-COASTAL WATERS FROM JAMES ISLAND TO
POINT GRENVILLE 10 TO 60 NM-COASTAL WATERS FROM POINT
GRENVILLE TO CAPE SHOALWATER 10 TO 60 NM.
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