776
FXUS66 KEKA 090852
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
152 AM PDT MON MAR 9 2026
SYNOPSIS
SOME WEAK CLIPPING FRONTS WILL BRING SMALL CHANCES OF
VERY LIGHT COASTAL DRIZZLE OR A FEW SHOWERS BETWEEN PERIODS OF
REBOUNDING WARM TEMPERATURES. NORTHERLY WINDS WILL REMAIN GUSTY,
PARTICULARLY THROUGH THE EARLY WORK WEEK. CHILLY MORNING
CONDITIONS ARE FORECAST EARLY TO MID WEEK.
DISCUSSION
A COLD FRONT WILL CONTINUE THROUGH NORTHWEST
CALIFORNIA KEEPING TEMPERATURES COOLER AND MORE IN LINE WITH
AVERAGES FOR THIS TIME OF YEAR. ALSO, THIS WEAK FRONT WILL BRING
LIGHT TO OCCASIONAL HEAVY DRIZZLE THIS MORNING, RESULTING IN
TRACE AMOUNTS OF ACCUMULATION. THE MARINE LAYER IS ALSO EXPECTED
TO DEEPEN THIS MORNING. AFTERNOON TEMPERATURES WILL CONTINUE TO BE
SLIGHTLY WARMER THAN AVERAGE FOR INLAND LOCATIONS IN EASTERN
TRINITY, EASTERN MENDOCINO, AND LAKE COUNTIES.
NORTHERLY WINDS WILL REMAIN BREEZY. A CUTOFF LOW TO THE SOUTH WILL
FURTHER TIGHTEN THE PRESSURE GRADIENT AGAINST THE RESTRENGTHENING
RIDGE MONDAY AND TUESDAY. NORTHERLY WINDS WILL INCREASE IN RESPONSE
AND WILL BE QUITE GUSTY THIS AFTERNOON, IN PARTICULAR. FORECAST
SOUNDINGS INDICATE WELL-MIXING THROUGH THE BOUNDARY LAYER THROUGH
THIS PERIOD, ALLOWING FOR EFFICIENT DOWNWARD MOMENTUM TRANSFER AND
GUSTY SURFACE WINDS ALONG THE COAST. NBM HOLDS A HIGH CHANCE
(60%- 80%) FOR MAXIMUM WIND GUST OF 30 MPH OR HIGHER MONDAY FOR
AREAS ALONG THE COAST AND HIGHER TERRAIN AREAS OF INTERIOR DEL
NORTE AND HUMBOLDT COUNTIES. THERE IS A MODERATE TO HIGH CHANCE
(40%-60%) FOR GUSTS TO EXCEED 35 MPH OVER SOME OF THE EXPOSED
COASTAL HEADLANDS AND OVER COASTAL DEL NORTE AND AROUND CAPE
MENDOCINO. WINDS WILL EASE SOME TUESDAY, BUT WILL REMAIN BREEZY
THROUGH TUESDAY AFTERNOON.
CHILLY, AND POTENTIALLY FROSTY, MORNING CONDITIONS COULD OCCUR IN
THE WAKE OF THE PASSING FRONT TUESDAY AND WEDNESDAY MORNINGS.
HOWEVER, ON TUESDAY MORNING, LINGERING ELEVATED WINDS ALONG WITH
GENERALLY OVERCAST SKIES COULD RESULT IN MORNING TEMPERATURES
ABOVE 36 RESULTING IN NO FROST DEVELOPMENT. AS OF NOW, WEDNESDAY
SEEMS LIKE THE BEST BET FOR FROSTY CONDITIONS. FOR BOTH MORNINGS,
NBM INDICATES THAT COASTAL LOCATIONS FROM ABOUT ALBION IN
MENDOCINO COUNTY TO THE OREGON BORDER HAVE ABOUT A 60 TO 80
PERCENT CHANCE OF LOWS BELOW 40 DEGREES (THIS INCLUDES AREAS
AROUND HUMBOLDT BAY AND CRESCENT CITY). THERE IS ALSO ABOUT A 50
TO 70 PERCENT CHANCE FOR MORNING LOW TEMPERATURES 36 DEGREES OR
LESS FOR SOME REGIONS OF INTERIOR DEL NORTE, INTERIOR HUMBOLDT,
TRINITY, AND NE MENDOCINO COUNTIES. THE GROWING SEASON HAS BEGUN
FOR MENDOCINO, LAKE, COASTAL DEL NORTE, AND THE NORTHERN HUMBOLDT
COAST, SO A FROST PRODUCT COULD BE APPLICABLE FOR JUST NE
MENDOCINO (INCLUDING LEGGET, LAYTONVILLE, WILLITS, POTTER VALLEY,
AND COVELO) FOR ONE OR BOTH MORNINGS.
A STRONG PACIFIC RIDGE WILL GENERALLY REMAIN IN CONTROL AS
ADDITIONAL WEAK FRONTS ATTEMPT TO BRIEFLY FLATTEN IT, INTRODUCING
MORE VERY SLIM CHANCES FOR LIGHT SHOWERS, MAINLY IN DEL NORTE
COUNTY. CHANCES FOR A WETTING RAINFALL (0.1 INCH OR HIGHER) ONLY
REACH 25% TO 35% LATE THIS WEEK AND INCREASE SOME THIS COMING
WEEKEND. THERE WILL BE PERIODS OF REBOUNDING HIGH TEMPERATURES
BETWEEN THE FRONTS. /JLW & JJW & EYS
AVIATION...6Z TAFS
STRATUS HAS ESTABLISHED ITSELF OVER A GOOD
PORTION OF HUMBOLDT AND TRINITY COUNTIES. IFR LEVELS WILL PERSIST AS
A COLD FRONT PASSES THROUGH. CHANCES FOR LIFR AND LIGHT DRIZZLE WILL
REMAIN BEFORE FRONTAL PASSAGE NEAR 12Z MONDAY. PROBABILITIES QUICKLY
LOWER THEREAFTER WITH LIFTING CEILINGS AND SCATTERING STRATUS.
NORTHERLY WINDS WILL INCREASE THROUGHOUT THE DAY MONDAY, AND THE
COASTAL TERMINALS WILL RECEIVE WIND GUSTS OF 30 KTS, AND UP TO 40
KTS MONDAY AFTERNOON BEFORE SUBSIDING INTO THE EVENING.
MARINE
NORTHERLY WINDS ARE STRENGTHENING IN ALL WATERS MONDAY
BEHIND A COLD FRONT. THIS ROUND OF NORTHERLY WINDS WILL BE ON THE
STRONGER SIDE, WITH GUSTS TO 40 TO 45 KTS. GALE CONDITIONS WILL
REMAIN IN ALL ZONES THROUGH MONDAY NIGHT BEFORE BEGINNING TO SLOWLY
SUBSIDE. GALE CONDITIONS WILL REMAIN IN THE SOUTHERN WATERS
THROUGHOUT THE DAY TUESDAY. LARGE STEEP AND HAZARDOUS SEAS WILL
BUILD 13 TO 15 FT MONDAY EVENING THROUGH TUESDAY. NORTHERLY WINDS
WILL GREATLY EASE WEDNESDAY, BUT WILL REMAIN 15 TO 20 KTS AROUND AND
DOWNWIND OF CAPE MENDOCINO THROUGH THE WEEK AND LIKELY LONGER.
EKA WATCHES/WARNINGS/ADVISORIES
CA...
NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY UNTIL 5 AM PDT EARLY THIS MORNING FOR
PZZ450-470.
GALE WARNING FROM 5 AM EARLY THIS MORNING TO 4 AM PDT
TUESDAY FOR PZZ450-470.
GALE WARNING UNTIL 10 AM PDT TUESDAY FOR PZZ455.
GALE WARNING UNTIL 5 AM PDT WEDNESDAY FOR PZZ475.
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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