989
FXUS66 KSEW 272244
AFDSEW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
244 PM PST SAT DEC 27 2025
SYNOPSIS
HIGH PRESSURE BEGINS TO BUILD OVER THE AREA TODAY, DRYING
CONDITIONS OUT BUT ALLOWING FOR COLDER OVERNIGHT TEMPERATURES AND
LIKELY FOG DEVELOPMENT EACH MORNING INTO EARLY NEXT WEEK. A RETURN
TO A MORE TYPICAL PATTERN OF LOWLAND RAIN AND MOUNTAIN SNOW IS
EXPECTED LATE IN THE UPCOMING WEEK.
SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/
CURRENT TRENDS INDICATE LITTLE TO NO PRECIPITATION REMAINING
ACROSS WESTERN WASHINGTON THIS AFTERNOON. THERE WILL BE A SLIGHT
CHANCE OF PRECIPITATION ALONG THE COAST AND MAYBE PORTIONS OF SW
WASHINGTON THIS EVENING. SOME OF THIS COULD COME IN THE FORM OF
A RAIN-SNOW MIX AT TIMES, BUT AMOUNTS WILL BE VERY LIGHT AND NO
SIGNIFICANT IMPACTS ARE EXPECTED.
MOVING FORWARD HIGH PRESSURE WILL CONTINUE TO BUILD RESULTING IN
MAINLY DRY CONDITIONS THROUGH TUESDAY. OVERNIGHT LOWS WILL
CONTINUE TO HANG AROUND FREEZING. OTHERWISE, THE ONLY REAL
IMPACTFUL WEATHER WILL BE THE POTENTIAL FOR SOME MORNING
FOG/FREEZING FOG, MOST NOTABLY ACROSS THE SOUTH SOUND.
HIGH TEMPERATURES WILL HANG OUT IN THE LOW TO MID 40S DURING
THIS PERIOD.
LONG TERM /WEDNESDAY THROUGH SATURDAY/
THERE IS REMAINS SOME UNCERTAINTY ABOUT WHEN THE RIDGE WILL
BREAK DOWN, BUT IN GENERAL, SOMETIME BETWEEN WEDNESDAY AND
THURSDAY NIGHT IS MOST LIKELY. ONCE IT DOES, THE DOOR WILL BE
OPEN TO WEATHER SYSTEMS MOVING THROUGH THE AREA BRINGING US
FAIRLY TYPICAL PNW WEATHER INCLUDING LOWLAND RAIN, MOUNTAIN
SNOW, AND OCCASIONALLY BREEZY WINDS. AT THIS TIME THERE IS
LITTLE SIGNAL FOR UNUSUAL WEATHER THROUGH NEXT SATURDAY. THAT
SAID, TRAVEL ACROSS THE MOUNTAINS COULD BE CHALLENGING AT TIMES
DUE SNOW.
-WOLCOTT-
AVIATION
NORTHWESTERLY FLOW ALOFT WILL PERSIST THROUGH THE TAF PERIOD AS
AN UPPER LEVEL RIDGE OVER THE NORTHEASTERN PACIFIC BUILDS INTO
THE AREA FROM THE WEST. A WEAK SYSTEM EMBEDDED IN THE FLOW
ALOFT WILL MOVE OVER THE AREA TONIGHT, BRINGING THE POTENTIAL
FOR SOME LIGHT SHOWER ACTIVITY TO PORTIONS OF THE COAST AND
MOUNTAINS. RADAR THIS AFTERNOON, HOWEVER, INDICATES THAT
LINGERING SHOWERS FROM THIS MORNING HAVE DISSIPATED ACROSS THE
AREA.
CONDITIONS ACROSS THE MAJORITY OF THE TERMINALS THIS AFTERNOON
ARE VFR AS A RESULT, WITH LATEST SATELLITE IMAGERY SHOWING
CLOUDS CONTINUING TO SCATTER ACROSS THE SOUND AND COAST THIS
AFTERNOON. VFR CONDITIONS ARE FAVORED TO CONTINUE THROUGH THE
REMAINDER OF THE DAY WITH MID TO HIGH LEVEL CLOUD COVER EXPECTED
TO INCREASE ACROSS THE AREA LATE THIS AFTERNOON INTO THIS
EVENING. CLEARING OVERNIGHT WILL BRING THE POTENTIAL FOR FOG
DEVELOPMENT ACROSS THE SOUND AND SOUTHWEST INTERIOR WITH LIGHT
WINDS AND AMPLE LOW LEVEL MOISTURE. A RANGE FROM MVFR TO LIFR
CONDITIONS WILL BE POSSIBLE FOR A FEW HOURS ON SUNDAY MORNING
FOR ANY TERMINALS IN FOG.
SURFACE WINDS REMAIN LIGHT AND GENERALLY OUT OF THE NORTH BETWEEN
3-7 KT. WINDS WILL GRADUALLY START TO SHIFT BACK TO THE SOUTH
BY THIS EVENING.
KSEA...VFR, WITH NE WINDS PERSISTING AT 3-7 KT. WINDS WILL
GRADUALLY SHIFT TO THE SE AND THEN S THROUGH THE EVENING HOURS,
REMAINING LIGHT. LOW STRATUS IS POSSIBLE IN THE VICINITY OF THE
TERMINAL BETWEEN 12Z-18Z SUNDAY. LATEST GUIDANCE SHOWS A 60
PERCENT CHANCE OF CONDITIONS DROPPING DOWN TO MVFR AT THE TERMINAL
AND A 25 PERCENT CHANCE OF CONDITIONS DROPPING DOWN TO IFR
DURING THIS TIME.
14
MARINE
HIGH PRESSURE WILL BUILD ACROSS THE COASTAL WATERS TONIGHT AND
REMAIN SITUATED OVER THE REGION INTO EARLY NEXT WEEK. SMALL
CRAFT ADVISORIES REMAIN IN EFFECT FOR THE COASTAL WATERS THROUGH THIS
AFTERNOON FOR SEAS HOVERING AROUND 10 FT. SEAS WILL CONTINUE TO
SUBSIDE TOWARDS 5-7 FT THIS EVENING AND THEN TOWARDS 3-6 FT ON
SUNDAY, THOUGH SYSTEMS PASSING BY TO THE NORTH WILL ALLOW FOR
SEAS TO BUILD BACK TOWARDS 6-9 FT AGAIN BY MONDAY.
DENSE FOG MAY DEVELOP OVER PORTIONS OF THE AREA WATERS WITH
CLEARING CONDITIONS AND LIGHT WINDS DURING THE OVERNIGHT PERIODS
THE NEXT FEW DAYS AND WILL LIKELY RESTRICT VISIBILITIES AT
TIMES.
THE NEXT FRONT THEN LOOKS TO DROP DOWN INTO THE AREA WATERS BY
LATE WEDNESDAY INTO THURSDAY, WHICH WILL LIKELY BRING THE NEXT
ROUND OF HEADLINES TO THE AREA WATERS.
14
HYDROLOGY
NO RIVER FLOODING IN THE NEXT 7 DAYS.
SEW WATCHES/WARNINGS/ADVISORIES
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 6 PM PST THIS EVENING FOR COASTAL
WATERS FROM CAPE FLATTERY TO JAMES ISLAND 10 TO 60 NM-
COASTAL WATERS FROM CAPE FLATTERY TO JAMES ISLAND OUT 10
NM-COASTAL WATERS FROM JAMES ISLAND TO POINT GRENVILLE 10
TO 60 NM-COASTAL WATERS FROM JAMES ISLAND TO POINT
GRENVILLE OUT 10 NM-COASTAL WATERS FROM POINT GRENVILLE
TO CAPE SHOALWATER 10 TO 60 NM-COASTAL WATERS FROM POINT
GRENVILLE TO CAPE SHOALWATER OUT 10 NM-GRAYS HARBOR BAR.
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