039
FXUS66 KEKA 110846
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
1246 AM PST SUN JAN 11 2026
SYNOPSIS
COOL CONDITIONS WILL STEADILY WARM THROUGH LATE NEXT
WEEK. THE INLAND VALLEYS WILL SEE NIGHT AND MORNING LOW CLOUDS AND
FOG ALONG MORE LIMITED WARMING.
DISCUSSION
HIGH PRESSURE CONTINUES TO BUILD INTO NORTHERN
CALIFORNIA, ALTHOUGH IT REMAINS FLAT WITH A WEATHER SYSTEM MOVING
INTO THE PACIFIC NORTHWEST. AS A RESULT, SOME HIGH CLOUDS WILL
CONTINUE TO MOVE OVER PORTIONS OF THE AREA THROUGH THE WEEKEND.
MANY OF THE INTERIOR VALLEYS COULD SEE LOW CLOUDS EACH MORNING AND
INTO EARLY THIS WEEK. IT IS POSSIBLE THAT SOME LOW CLOUDS MAY
FORM ALONG THE COAST, AS WELL. THESE LOW CLOUDS AND TEMPERATURE
INVERSIONS IN THE VALLEYS ARE EXPECTED TO KEEP TEMPERATURES COOL,
EVEN THOUGH THE LOW CLOUDS MAY CLEAR OUT BY THE LATE MORNING AND
AFTERNOON. NO RAIN IS EXPECTED.
THIS COMING WEEK, HIGH PRESSURE IS FORECAST TO STRENGTHEN WHICH
WILL BRING WARM AIR ALOFT. THIS WILL STRENGTHEN THE VALLEY
INVERSIONS KEEPING FOG AND LOW CLOUDS IN MANY OF THEM. THIS MAY
ALSO KEEP HIGH TEMPERATURES IN THE COLDER VALLEYS FROM WARMING TOO
MUCH.
DRY WEATHER WILL LIKELY CONTINUE THROUGH THIS COMING WEEK.
ENSEMBLES ARE HINTING AT A SMALL CHANCE FOR SOME PRECIPITATION IN
THE LONG RANGE (BEYOND 7 DAYS OUT). MKK
AVIATION...(06Z TAFS)
VFR WITH OCCASIONAL CIRROSTRATUS IS
EXPECTED TO CONTINUE TONIGHT AND SUNDAY. WINDS TO REMAIN LIGHT AND
VARIABLE AT FORECAST TERMINALS THROUGH THE PERIOD. CHANCE FOR FOG
AND MIST WITH PARTIAL OR FULL SKY OBSCURATION INCREASES FOR COASTAL
TERMINALS (KCEC AND KACV) SUNDAY EVENING AND OVERNIGHT WITH SHALLOW
HUMID LAYER BUILDING NEARSHORE. CONFIDENCE IN THIS REMAINS LOW DUE
TO SLIGHT OFFSHORE FLOW WHICH MAY KEEP STRATUS FROM IMPACTING
COASTAL TERMINALS. OTHERWISE, INTERIOR FOG AND LIFR CEILINGS IN THE
VALLEYS OF TRINITY, HUMBOLDT AND NORTHERN MENDOCINO COUNTIES WILL
CLEAR OUT BY NOON ON SUNDAY.
MARINE
A LONG PERIOD WESTERLY SWELL WILL BUILD SUNDAY THROUGH
SUNDAY EVENING, PEAKING AROUND 12 FT AT 16 SECONDS BY MONDAY
MORNING. THE SWELL WILL NOT BE VERY STEEP, HOWEVER SWELL HEIGHTS
OVER 10 FEET WILL POSE A DANGER TO MARINERS OPERATING SMALL VESSELS
AND AN ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT. LIGHT TO
MODERATE NORTHERLIES RETURN ON MONDAY AND INCREASE BY TUE. GUSTS
OVER 25 KTS WILL BECOME INCREASINGLY LIKELY (OVER 70% CHANCE) TUE
INTO WED WITH LESSER CHANCES (30%) FOR GALE GUSTS > 34 KT, MOSTLY
OVER THE OUTER WATERS AND AROUND CAPE MENDOCINO. ELEVATED STEEP
NORTHERLY WAVES IN COMBINATION WITH A DECAYING WESTERLY SWELL WILL
CONTINUE ON THU AND SEAS SHOULD REMAIN HAZARDOUS FOR SMALL CRAFT.
BEACH HAZARDS
ON SUNDAY, ANOTHER LONG PERIOD WESTERLY SWELL
ORIGINATING FROM A LOW NEAR THE ALEUTIANS FILLS IN AT AROUND 7 FT AT
20 SECONDS AND PEAKS AROUND 12 FT AT 16 SECONDS. A BEACH HAZARD
STATEMENT HAS BEEN ISSUED FOR THIS MODERATE SNEAKER WAVE THREAT LATE
SUNDAY MORNING THROUGH MONDAY AFTERNOON. STAY MUCH FARTHER BACK FROM
THE OCEAN AND AVOID STEEP BEACHES AND JETTIES. REMEMBER, NEVER TURN
YOUR BACK ON THE OCEAN! JB
EKA WATCHES/WARNINGS/ADVISORIES
CA...
BEACH HAZARDS STATEMENT FROM 10 AM PST THIS MORNING THROUGH
MONDAY AFTERNOON FOR CAZ101-103-104-109.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY FROM 3 PM THIS AFTERNOON TO 11 PM PST
MONDAY FOR PZZ450-455.
SMALL CRAFT ADVISORY FROM 3 PM THIS AFTERNOON TO 3 AM PST
TUESDAY FOR PZZ470-475.
NOTE: THE FULL FORECAST DISCUSSION IS NOW REGULARLY ISSUED BETWEEN
10 AM/PM AND 1 PM/AM. ADDITIONAL UPDATES WILL BE ISSUED AS NEEDED.
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