475
FXUS66 KSEW 161537
AFDSEW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
840 AM PDT TUE OCT 16 2018
SYNOPSIS
DRY WEATHER WILL CONTINUE INTO EARLY NEXT WEEK. THE
UPPER RIDGE OF HIGH PRESSURE WILL BREAK DOWN EARLY NEXT WEEK.
SHORT TERM
AN UPPER RIDGE OVER THE AREA WILL FLATTEN ON
WEDNESDAY AS A SHORT WAVE PASSES TO THE NORTH THEN REBUILD OVER
THE AREA ON THURSDAY. THERE MIGHT BE SOME HIGH CLOUDS AT TIMES
WEDNESDAY AND THURSDAY. OTHERWISE IT LOOKS SUNNY THE NEXT FEW
DAYS. PATCHY VALLEY FOG IS POSSIBLE EACH MORNING AS WELL. HIGHS
WILL BE IN THE 60S WITH SOME LOWER 70S IN A FEW SPOTS TODAY AND
WEDNESDAY. LOW LEVEL OFFSHORE FLOW WILL TURN WEAKLY ONSHORE LATER
WEDNESDAY AND THURSDAY IN RESPONSE TO THE PASSING UPPER SHORT
WAVE. THE UPSHOT WILL BE TO COOL HIGHS A FEW DEGREES ON THURSDAY.
LONG TERM
DRY WEATHER WILL CONTINUE FRIDAY THROUGH MONDAY WITH
HIGH PRESSURE ALOFT IN CONTROL. A STRONG UPPER RIDGE OVER THE
AREA ON FRIDAY WILL GRADUALLY WEAKEN AND SHIFT INLAND OVER THE
WEEKEND. A FRONT WILL APPROACH FROM THE WEST ON MONDAY BUT RAIN
SHOULD HOLD OFF UNTIL MONDAY NIGHT OR TUESDAY. HIGHS WILL BE IN
THE 60S EACH DAY WITH A GRADUAL COOLING TREND BACK TO NEAR NORMAL
BY MONDAY. SCHNEIDER
AVIATION
UPPER LEVEL HIGH PRESSURE REMAINS IN CONTROL TODAY
WITH LIGHT NORTHERLY FLOW ALOFT. AT THE SURFACE, OFFSHORE FLOW
CONTINUES. SOME PATCHY FOG AGAIN WEDNESDAY MORNING IN THE USUAL
RIVER VALLEY LOCATIONS.
KSEA...CLEAR SKIES. NORTHERLY WINDS UNDER 10 KTS. CEO
MARINE
HIGH PRESSURE REMAINS IN CONTROL WITH OFFSHORE FLOW AT
THE SURFACE THROUGH WEDNESDAY MORNING. SMALL CRAFT ADVISORY WINDS
THROUGH THE WEST ENTRANCE TO THE STRAIT AND ADJACENT COASTAL
WATERS WILL GRADUALLY EASE THROUGH THE AFTERNOON HOURS. THE HIGH
WILL WEAKEN WEDNESDAY AND THURSDAY WITH SURFACE FLOW BECOMING
LIGHT ONSHORE. NORTHWESTERLY ONSHORE FLOW PATTERN WILL CONTINUE
INTO THE WEEKEND. CEO
SEW WATCHES/WARNINGS/ADVISORIES
WA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL NOON PDT TODAY FOR COASTAL WATERS
FROM CAPE FLATTERY TO JAMES ISLAND OUT 10 NM-WEST ENTRANCE
U.S. WATERS STRAIT OF JUAN DE FUCA.
WWW.WEATHER.GOV/SEATTLE
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