642
FXUS66 KSEW 250400
AFDSEW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
800 PM PST SAT JAN 24 2026
SYNOPSIS
UPPER LEVEL RIDGE OFFSHORE THROUGH TOMORROW
WEAKENING SUNDAY NIGHT. THE RIDGE WILL MOVE INLAND MONDAY NIGHT
AND TUESDAY. A SPLITTING SYSTEM WILL ARRIVE WEDNESDAY WITH A
MORE CONSOLIDATED SYSTEM POSSIBLE LATE IN THE WEEK.
SHORT TERM /TODAY THROUGH MONDAY NIGHT/
NO UPDATES. FORECAST ON
TRACK. 27
HIGH PRESSURE REMAINS IN CONTROL THROUGH THE SHORT TERM FOR ONGOING
DRY AND STABLE CONDITIONS. MINIMUM TEMPERATURES IN THE 20S EXPECTED
OVERNIGHT, SIMILAR TO THIS MORNING, AND A COLD WEATHER ADVISORY IS
IN EFFECT (COLDEST AREAS AWAY FROM THE SOUND). OTHERWISE, SUNNY AND
HIGHS IN THE 40S ON SUNDAY. MONDAY'S LOWS WILL BE A FEW DEGREES
WARMER WITH INCREASING HIGH CLOUDS, HOWEVER MORNING TEMPS WILL STILL
BE NEAR FREEZING IN THE METRO AREA. 33
LONG TERM /TUESDAY THROUGH FRIDAY/
THE RIDGE AXIS MOVES
OVERHEAD ON TUESDAY FOR ONE LAST DRY DAY. THE RIDGE THEN SHIFTS
FARTHER EAST ON WEDNESDAY WHILE A WEAK FRONT MOVES INLAND.
TEMPERATURES WILL MODERATE UNDER MOIST, SW FLOW AND LOWLAND
TEMPERATURES WILL REMAIN ABOVE FREEZING. SNOW LEVELS WILL HOVER
CLOSE TO 4,000 FEET WITH A FEW INCHES OF SNOW ON THE HIGHER
MOUNTAIN PEAKS AND PASSES. ADDITIONAL FRONTS REACH THE AREA OVER
THE LATTER HALF OF THE WEEK FOR MORE LOWLAND RAIN AND MOUNTAIN
SNOW. TEMPERATURES WILL TRACK CLOSE TO AVERAGE. 33
AVIATION
A HIGH AMPLITUDE RIDGE WILL BEGIN TO MOVE ACROSS
THE AREA TONIGHT INTO MONDAY, WITH WINDS SHIFTING FROM NORTHWEST
TO SOUTHWEST ALOFT. VFR CONDITIONS PREVAIL ACROSS THE REGION
THIS AFTERNOON AND WILL CONTINUE TO DO SO FOR MOST OF THE TAF
PERIOD. ANOTHER ROUND OF FREEZING FOG AND LOW STRATUS, HOWEVER,
IS ON DECK ONCE AGAIN FOR THE SOUTH SOUND NEAR OLM (25-35% PROB)
AND CLM ONCE AGAIN SUNDAY MORNING. PROBABILITIES ARE LOWER FOR
THE METRO AREA (15- 20%) AND GIVEN THE PATTERN THE PAST FEW
DAYS, FOG REMAINS UNLIKELY THERE. WINDS REMAIN LIGHT OFFSHORE,
BUT MOST INTERIOR TERMINALS HAVE LIGHT AND VARIABLE WINDS AND
WILL REMAIN LIKE SO THROUGH THE TAF PERIOD.
KSEA...VFR CONDITIONS WITH CLEAR SKIES. LIGHT AND VARIABLE, THOUGH
MOSTLY N/NE WINDS. THERE'S A 15-20% OF LOW STRATUS, BUT THIS REMAINS
A LOW- PROBABILITY SCENARIO.
62
MARINE
BROAD HIGH PRESSURE ACROSS THE NORTHEAST PACIFIC WILL
REMAIN IN PLACE THROUGH THE WEEKEND WITH GENERALLY CALM WINDS.
THE NEXT PERIOD OF IMPACTFUL MARINE WEATHER DOESN'T LOOK TO
ARRIVE UNTIL MONDAY INTO TUESDAY, AS A WEAK FRONTAL SYSTEM
APPROACHES THE WEST COAST AND BRINGS BACK INCREASING SOUTHERLY
WINDS. A STRONGER FRONTAL SYSTEM WILL APPROACH THE WATERS MID-
WEEK, BRINGING A PERIOD OF BREEZY SOUTHERLIES ACROSS THE COASTAL
WATERS.
SEAS 3 TO 5 FT WILL CONTINUE THIS WEEKEND, INCREASING TO THE 8-12 FT
RANGE WEDNESDAY AND THROUGH THE REMAINDER OF NEXT WEEK AS SYSTEMS
MOVE BACK INTO THE AREA. LARGER SEAS MAY BE POSSIBLE LATE NEXT WEEK
AS SYSTEMS MAY DEVELOP IN THE GULF OF ALASKA TO PRODUCE LARGE, LONG
PERIOD SWELL.
15/62
HYDROLOGY
NO RIVER FLOODING IN THE NEXT 7 DAYS.
SEW WATCHES/WARNINGS/ADVISORIES
WA...COLD WEATHER ADVISORY FROM MIDNIGHT TONIGHT TO 9 AM PST SUNDAY
FOR CITY OF SEATTLE-DOWNTOWN EVERETT / MARYSVILLE AREA-
EASTERN KITSAP COUNTY-EASTSIDE-LOWLANDS OF LEWIS AND
SOUTHERN THURSTON COUNTIES-LOWLANDS OF PIERCE AND
SOUTHERN KING COUNTIES-OLYMPIA AND SOUTHERN PUGET SOUND-
SHORELINE / LYNNWOOD / SOUTH EVERETT AREA.
PZ...NONE.
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