056
FXUS66 KSEW 252137
AFDSEW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
137 PM PST SUN JAN 25 2026
SYNOPSIS
UPPER LEVEL RIDGE OFFSHORE WEAKENING TONIGHT.
INCREASING CLOUDS MONDAY AS A WEAK SYSTEM MOVES THROUGH THE
RIDGE. RIDGE REBUILDING MONDAY NIGHT, MOVING INLAND TUESDAY.
SPLITTING SYSTEM ARRIVING WEDNESDAY. MORE CONSOLIDATED SYSTEMS
MOVING THROUGH WESTERN WASHINGTON AT THE END OF THE WEEK.
SHORT TERM /TODAY THROUGH TUESDAY NIGHT/
HIGH PRESSURE IS
STILL IN CONTROL FOR MORE DRY AND STABLE CONDITIONS. WE WILL SEE
INCREASING MID/HIGH LEVELS CLOUDS MOVING ALOFT TONIGHT, DUE TO A
WEAK DISTURBANCE MOVING INTO B.C. OVERNIGHT LOWS WILL BE A FEW
DEGREES WARMER AS A RESULT, HOWEVER WE WILL STILL SEE LOWS NEAR
FREEZING ACROSS THE METRO AREA. THE RIDGE AXIS WILL SHIFT
INLAND MONDAY NIGHT, THEN CROSS WESTERN WA ON TUESDAY FOR ONE
LAST DRY DAY. THE AIR MASS IS A LITTLE WARMER WITH HIGHS
REACHING THE LOWER 50S. 33
LONG TERM /WEDNESDAY THROUGH SATURDAY/
A WEAK/SPLITTING
FRONTS MOVES INLAND ON WEDNESDAY FOR A CHANCE OF RAIN.
TEMPERATURES WILL MODERATE WITH LOWS AROUND 40 AND HIGHS AROUND
50. SNOW LEVELS ARE AROUND 4,000-5,000 FT AND THE HIGHER PEAKS
AND PASSES MAY SEE A FEW INCHES OF SNOW. EAST WINDS MAY KEEP
SNOW LEVELS LOWER AT SNOQUALMIE PASS WITH LIGHT FREEZING RAIN
POSSIBLE WEDNESDAY AFTERNOON AND EVENING.
WESTERN WA REMAINS UNDER MOIST, SW FLOW MOVING THROUGH THE END
OF THE WEEK, WITH A RETURN OF LOWLAND RAIN AND MOUNTAIN SNOW.
SNOW LEVELS REMAIN HIGH, AROUND 5,000 FT, WITH MIXED PRECIP
RAIN/FREEZING RAIN/SNOW AT STEVENS PASS FRIDAY (DUE TO EAST
WINDS). WITH A MILD AIR MASS IN PLACE, TEMPERATURES ARE
TRACKING A FEW DEGREES WARMER THAN AVERAGE WITH HIGHS IN THE
LOWER TO MID 50S AND LOWS IN MID 40S. 33
AVIATION
AN UPPER LEVEL RIDGE WILL SHIFT INLAND TODAY INTO
MONDAY, WITH A SECOND RIDGE TRAILING IMMEDIATELY BEHIND. MOST
TERMINALS ARE VFR THIS AFTERNOON (EXCEPT FOR LINGERING FOG AT
KOLM THIS AFTERNOON, WHICH IS STILL TRENDING ON SATELLITE
TOWARDS CLEARING AFTER 22Z). A BRIEF TROUGH IN BETWEEN RIDGES
WILL PRODUCE HIGH CLOUDS TONIGHT/MONDAY, THUS REDUCING
PROBABILITIES FOR FOG REDEVELOPMENT MONDAY MORNING (10% CHANCE
IN THE SOUTH INTERIOR). WINDS REMAIN LIGHT IN THE TAF PERIOD
(LESS THAN 5 KT), BUT SWITCH FROM NORTH TO SOUTH TONIGHT/MONDAY
(MAY ALSO BE LIGHT AND VARIABLE AT TIMES).
KSEA...VFR THROUGH THE TAF PERIOD. CLEAR THROUGH TONIGHT WITH HIGH
CLOUDS MONDAY. WINDS LESS THAN 5 KT, WILL SWITCH FROM NORTHERLY TO
SOUTHERLY, BUT MAY BE LIGHT AND VARIABLE AT TIMES.
HPR
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 TUESDAY, AS A WEAK FRONTAL SYSTEM APPROACHES THE
WEST COAST AND BRINGS BACK INCREASING SOUTHERLY WINDS THAT WILL
LIKELY REACH SMALL CRAFT ADVISORY CRITERIA ACROSS THE COASTAL
WATERS. A SERIES OF SYSTEMS THROUGH MID TO LATE WEEK WILL KEEP
BREEZY WINDS IN THE FORECAST WEDNESDAY AND BEYOND ACROSS ALL THE
AREA WATERS.
SEAS 3 TO 5 FT WILL CONTINUE THIS WEEKEND, INCREASING TO THE 10-15
FT RANGE TUESDAY, GETTING AS HIGH AS 18-20 FEET ON WEDNESDAY, AND
REMAINING ELEVATED AT 9-13 FEET THROUGH THE REMAINDER OF NEXT WEEK
AS SYSTEMS CONTINUE TO TRAVERSE ACROSS THE AREA.
62/15
HYDROLOGY
A RETURN TO WETTER WEATHER OVER THE SECOND HALF OF
THE WEEK WILL FORCE RISES ON THE SKOKOMISH RIVER IN MASON
COUNTY WITH MINOR FLOODING POSSIBLE. NO RIVER FLOODING IS
ANTICIPATED ELSEWHERE OVER THE NEXT 7 DAYS.
SEW WATCHES/WARNINGS/ADVISORIES
WA...NONE.
PZ...NONE.
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