513
FXUS66 KSEW 100942
AFDSEW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
242 AM PDT FRI APR 10 2026
SYNOPSIS
WARM AND DRY CONDITIONS WILL CONTINUE TODAY. WET AND COOLER
CONDITIONS EXPECTED THIS WEEKEND. A WEAK RIDGE WILL BUILD OVER
THE REGION ON MONDAY. A STRONGER FRONTAL SYSTEM MIDWEEK WILL
BRING LOWLAND RAIN, MOUNTAIN SNOW, AND BREEZY WINDS.
SHORT TERM /TODAY THROUGH SUNDAY/
A WEAK UPPER LEVEL RIDGE WILL REMAIN IN PLACE THROUGH TODAY.
CLOUD COVER WILL INCREASE THROUGHOUT THE DAY AS MOISTURE FROM
AN UPPER LEVEL LOW MOVING THROUGH CALIFORNIA MOVES NORTHWARD
INTO WESTERN WASHINGTON. DRY AND WARM CONDITIONS TODAY; HOWEVER,
LIGHT ISOLATED SHOWERS MAY LIFT NORTHWARDS ACROSS THE REGION
TODAY. TEMPERATURES TODAY WILL PEAK IN THE LOW 60S ALONG THE
COAST AND UPPER 60S/LOW 70S IN THE INTERIOR.
AN UPPER LEVEL LOW WILL MOVE SOUTHWARDS FROM THE GULF OF ALASKA
TODAY AND IMPACT CALIFORNIA THIS WEEKEND. AS THIS SYSTEM SLOWLY
PUSHES ACROSS THE GOLDEN STATE, RAIN WILL LIFT NORTH AND BRING
UNSETTLED CONDITIONS BACK TO WESTERN WASHINGTON. PRECIPITATION
AMOUNTS WITH THIS SYSTEM ARE EXPECTED TO BE LIGHT, WITH MOST
PLACES SEEING 0.10-0.25 INCHES ACROSS THE LOWLANDS AND UP TO
0.50 INCHES IN THE MOUNTAINS. IN ADDITION, THIS SYSTEM WILL
BRING SLIGHTLY COOLER DAYTIME TEMPERATURES. HIGH TEMPERATURES
WILL PEAK IN THE 50S THIS WEEKEND.
LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/
A WEAK TRANSIENT UPPER LEVEL RIDGE WILL BE IN PLACE ON MONDAY.
THE RIDGE WILL QUICKLY WEAKEN AS AN UPPER LEVEL TROUGH
APPROACHES WESTERN WASHINGTON ON TUESDAY. THE STRONGER SYSTEM
WILL MOVE OVER THE REGION ON WEDNESDAY, WHICH WILL BE
ACCOMPANIED BY WET AND COOLER CONDITIONS. LOWER SNOW LEVELS WILL
BRING LIGHT TO MODERATE SNOWFALL TO THE MOUNTAINS AND PASSES.
GUIDANCE HINTS AT BELOW NORMAL TEMPERATURES LATE NEXT WEEK,
WHICH MAY RESULT IN FROST.
29
AVIATION
SOUTHERLY FLOW ALOFT CONTINUES THROUGH TODAY WITH AN
UPPER LOW LOCATED OFFSHORE OF CALIFORNIA. HIGH CLOUDS WILL INCREASE
THROUGH THIS AFTERNOON WITH SOUTH FLOW ALOFT, BUT VFR CONDITIONS
WILL PREVAIL INTO THIS EVENING. CIGS WILL SLOWLY LOWER TONIGHT INTO
SATURDAY MORNING INTO MVFR AS SHOWERS BEGIN TO ARRIVE AFTER 06
SATURDAY. WINDS WILL REMAIN LIGHT, MAINLY UNDER 5 KTS, FOR MOST
SITES THROUGH TODAY, BEFORE INCREASING FROM THE SOUTH EARLY SATURDAY.
KSEA...VFR CONDITIONS INTO TONIGHT. HIGH CLOUDS WILL INCREASE
THROUGH TODAY. CIGS ARE EXPECTED TO LOWER INTO MVFR SATURDAY
MORNING, WITH A 50-60% PROBABILITY OF MVFR CIGS BY 18Z SATURDAY.
SHOWERS WILL ALSO BEGIN TO ARRIVE AFTER 06Z TONIGHT. NORTH WINDS
AROUND 4 TO 7 KTS ARE EXPECTED TO TRANSITION MORE W/NW THIS
AFTERNOON, MAINLY UNDER 6 KTS. WINDS WILL BECOME MORE S/SW LATE
TONIGHT INTO SATURDAY. JD
MARINE
NORTHERLY FLOW WILL CONTINUE OVER THE WATERS TODAY. HIGH
PRESSURE OVER THE AREA WILL CONTINUE TO WEAKEN TODAY AS A LOW
PRESSURE SYSTEM SWINGS SOUTH FROM THE GULF OF ALASKA TO THE WEST
OF THE COASTAL WATERS. NO SIGNIFICANT IMPACTS EXPECTED FROM
THIS SYSTEM.
HIGH PRESSURE WILL REBUILD OVER THE NE PACIFIC THIS WEEKEND,
WHILE LOWER PRESSURE REMAINS SITUATED INLAND, RESULTING IN
ONSHORE FLOW. PERIODS OF DIURNAL WESTERLY PUSHES ARE EXPECTED
THROUGH THE STRAIT OF JUAN DE FUCA THIS WEEKEND THROUGH INTO
EARLY NEXT WEEK. GUIDANCE IS HINTING THAT THE STRONGEST PUSH
THROUGH THE STRAIT OF JUAN DE FUCA WILL BE MONDAY NIGHT INTO
TUESDAY. CONFIDENCE CONTINUES TO INCREASE FOR SMALL CRAFT WINDS
THROUGH THE CENTRAL PORTION OF THE STRAIT. CURRENT PROBABILITIES
ARE AROUND 50-80%. A FRONTAL SYSTEM WILL TRAVERSE AREA WATERS
LATE TUESDAY INTO WEDNESDAY. GUIDANCE CONTINUES TO HIGHLIGHT
INCREASED WINDS FOR THE COASTAL WATERS AND PORTIONS OF THE
STRAIT OF JUAN DE FUCA. CURRENT PROBABILITIES OF SMALL CRAFT
WINDS FOR THE COASTAL WATERS ARE 50-70% AND 50-90% FOR THE
STRAIT OF JUAN DE FUCA. THERE IS A SMALL CHANCE (20-30%) FOR
GALES THROUGH THE CENTRAL PORTION OF THE STRAIT OF JUAN DE FUCA
TUESD.AY EVENING.
SEAS WILL REMAIN BELOW 10 FT THROUGH THE WEEKEND AND INTO EARLY
NEXT WEEK, HOVERING BETWEEN 4-7 FT. SEAS WILL BUILD ON WEDNESDAY
TOWARDS 10 FT.
29
HYDROLOGY
NO RIVER FLOODING IS EXPECTED IN THE NEXT SEVEN DAYS.
SEW WATCHES/WARNINGS/ADVISORIES
WA...NONE.
PZ...NONE.
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