978
FXUS66 KSEW 070432
AFDSEW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
832 PM PST THU MAR 6 2025
SYNOPSIS
DRY CONDITIONS ARE EXPECTED ACROSS WESTERN WASHINGTON
THROUGH FRIDAY AS AN UPPER LEVEL RIDGE MOVES OVER THE AREA. THE
RIDGE WILL PUSH FURTHER INLAND ON SATURDAY, ALLOWING FOR A WEATHER
SYSTEM MOVING INTO BRITISH COLUMBIA TO BRUSH THE NORTHWEST TIER
OF WASHINGTON OVER THE WEEKEND. ADDITIONAL SYSTEMS MOVING INTO THE
REGION NEXT WEEK WILL BRING THE POTENTIAL FOR LOWLAND RAIN,
MOUNTAIN SNOW, AND GUSTY WINDS TO WESTERN WASHINGTON.
SHORT TERM /TODAY THROUGH SATURDAY/
FORECAST REMAINS ON TRACK
THIS EVENING WITH NO UPDATES REQUIRED. SEE NEW AVIATION SECTION
BELOW.
WITH SKIES CLEARING AND WITH MOISTURE REMAINING IN THE LOW LEVELS,
CAN EXPECT ANOTHER ROUND OF LOW STRATUS AND FOG TO DEVELOP ACROSS
THE SOUND OVERNIGHT INTO EARLY FRIDAY.
AN UPPER LEVEL RIDGE WILL MOVE OVERHEAD ON FRIDAY, KEEPING
CONDITIONS DRY ACROSS WESTERN WASHINGTON. MORNING CLOUDS WILL
SCATTER BY THE AFTERNOON FOR ANOTHER ROUND OF AFTERNOON SUNSHINE.
HIGH TEMPERATURES ARE EXPECTED TO BE IN THE LOW TO MID 50S.
THE UPPER LEVEL RIDGE WILL PUSH FURTHER INLAND ON SATURDAY, ALLOWING
FOR A SYSTEM MOVING INTO BRITISH COLUMBIA TO SINK FURTHER SOUTH
AND BRUSH THE NORTHWESTERN TIER OF THE AREA. WHILE THE BULK OF
THE MOISTURE LOOKS TO REMAIN TO THE NORTH, THE MOST LIKELY AREAS
TO SEE PRECIPITATION WILL BE THE COAST, OLYMPIC PENINSULA, AND
AREAS GENERALLY FROM SNOHOMISH COUNTY NORTHWARD. THE REMAINDER OF
THE REGION GENERALLY LOOKS TO REMAIN DRY ON SATURDAY, THOUGH WILL
NEED TO KEEP AN EYE ON HOW THIS SYSTEM TRENDS OVER THE NEXT DAY OR
TWO. A FEW INCHES OF SNOW WILL BE POSSIBLE FOR THE NORTH CASCADES,
WITH AREAS AROUND MT. BAKER GENERALLY SEEING NEW SNOW AMOUNTS
BETWEEN 1-4 INCHES, WITH HIGHER AMOUNTS FOR THE HIGHEST PEAKS.
LONG TERM /SUNDAY THROUGH WEDNESDAY/
THE RIDGE WILL FLATTEN
OVER THE AREA ON SUNDAY, ALLOWING FOR THE SYSTEM TO SINK FURTHER
SOUTH AND MOVE INTO WESTERN WASHINGTON. LOWLAND RAIN WILL INCREASE
SUNDAY AFTERNOON AND EVENING. SNOW LEVELS WILL FALL DOWN TO
2000-3000 FT BY LATE SUNDAY, BRINGING AROUND 2-4 INCHES OF SNOW
FOR THE PASSES BY MONDAY. ADDITIONAL ROUNDS OF RAIN AND MOUNTAIN
SNOW WILL CONTINUE AS UPPER LEVEL TROUGHING SETS UP OVER THE
NORTHEASTERN PACIFIC AND ANOTHER SYSTEM MOVES INTO THE AREA ON
TUESDAY. A STRONGER SYSTEM MAY APPROACH NEAR MIDWEEK, WHICH MAY
BRING A PERIOD OF STRONGER WINDS TO THE REGION. 14
AVIATION
NORTHERLY FLOW ALOFT AS WEAK UPPER LEVEL RIDGING BUILDS
OVER THE AREA. VFR CONDITIONS ACROSS ALL AREA TERMINALS THIS
EVENING. SURFACE WINDS LIGHT AND VARIABLE AT MOST TERMINALS...THE
MOST NOTABLE EXCEPTION ARE WESTERLIES AT 8-12 KTS AT CLM...WITH
DIRECTION STARTING TO TURN SOUTHERLY AND REMAIN THERE THROUGHOUT THE
OVERNIGHT HOURS AND INTO FRIDAY. LOW CLOUDS (MVFR/IFR) EXPECTED TO
RETURN VERY LATE TONIGHT AND EARLY FRIDAY MORNING WITH THE POTENTIAL
OF LIFR IN PLACES MORE PRONE TO LOWER CIGS. TIMING ON THIS SHOWS
DEVELOPMENT STARTING AROUND 12Z, THEN PERSISTING THROUGH 19Z-22Z,
WHERE VFR WILL EVENTUALLY REBOUND.
KSEA...VFR CONDITIONS THIS EVENING WITH N/NW WINDS AROUND 4 TO 8
KNOTS. WINDS WILL START TO TURN S/SE AFTER 05Z AND WILL BE GENERALLY
LIGHT. LOW STRATUS WILL MAKE A RETURN TO THE TERMINAL LATE TONIGHT
INTO FRIDAY MORNING (11Z-18Z) WITH A 30% CHANCE OF MVFR CONDITIONS.
LOW CLOUDS WILL SCATTER AROUND 20Z FOR A RETURN TO VFR.
MAZURKIEWICZ/18
MARINE
SURFACE HIGH PRESSURE OFFSHORE WILL BRING CALM AND
BENIGN MARINE CONDITIONS TO THE AREA WATERS INTO FRIDAY. THE
PREVIOUS SMALL CRAFT ADVISORY FOR THE OUTER COASTAL WATERS WILL BE
ALLOWED TO EXPIRE AS SEAS WILL CONTINUE TO DECREASE UNDER
CRITERIA. A FRONTAL SYSTEM WILL MOVE OVER THE WATERS LATE FRIDAY
NIGHT INTO THE WEEKEND, LIKELY BRINGING SMALL CRAFT WINDS OVER THE
COASTAL WATERS. A MORE ACTIVE WEATHER PATTERN LOOKS INCREASINGLY
LIKELY EARLY NEXT WEEK THROUGH MIDWEEK.
COASTAL SEAS AROUND 6 TO 8 FEET THIS AFTERNOON, GRADUALLY
INCREASING LATE FRIDAY NIGHT TO 10 TO 14 FEET.
MAZURKIEWICZ
HYDROLOGY
NO RIVER FLOODING IS EXPECTED DURING THE NEXT 7 DAYS.
SEW WATCHES/WARNINGS/ADVISORIES
WA...NONE.
PZ...NONE.
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