216
FXUS66 KEKA 082037
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
137 PM PDT SUN MAR 8 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.
DISCUSSION
A PASSING COLD FRONT IS KEEPING TEMPERATURES COOL
TODAY WITH LIGHT DRIZZLE PRODUCING TRACE AMOUNTS OF ACCUMULATION.
HRRR MODEL SUGGESTS A CONTINUATION OF SIMILAR CONDITIONS TONIGHT
AS THE MARINE LAYER DEEPENS WHICH WILL LAST WELL INTO MONDAY
MORNING. TEMPERATURES WILL STILL BE WARMER THAN AVERAGE,
ESPECIALLY FOR INLAND LOCATIONS. THE MINIMUM TEMPERATURES
OVERNIGHT INTO TUESDAY MORNING COULD REACH THE HIGH 20'S, LOW 30'S
FOR SOUTHERN TRINITY COUNTY AROUND RUTH AND MAD RIVER. SIMILAR
LOW TEMPERATURES FOR INTERIOR HUMBOLDT'S EASTERN PERIPHERY. A
FROST OR FREEZE PRODUCT COULD BE APPLIED IN THE NEAR FUTURE TO
COVER THE HAZARDS.
A STRONG PACIFIC RIDGE WILL GENERALLY REMAIN IN CONTROL AS
ADDITIONAL WEAK FRONTS ATTEMPT TO BRIEFLY FLATTEN IT, INTRODUCING
MORE VERY SLIGHT CHANCES FOR LIGHT SHOWERS ON OCCASION, MAINLY IN
DEL NORTE COUNTY. CHANCES FOR A WETTING RAINFALL (0.1 INCH OR
HIGHER) ONLY REACH 25% TO 35% LATE NEXT WEEK AND INCREASE SOME
NEXT WEEKEND. THERE WILL PERIODS OF REBOUNDING HIGH TEMPERATURES
BETWEEN THE FRONTS.
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 MONDAY 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. JJW /EYS
AVIATION
NORTH COAST TERMINALS REMAIN IN LIFR/IFR THIS MORNING
DUE TO LOW CLOUD CEILINGS AND DEGRADED VISIBILITIES. USING ASOS AND
WEBCAM DATA, THE CLOUD LAYER IS BETWEEN ~400-3000 FT AGL. HIGH
RESOLUTION MODELS SHOW CONFIDENCE IN THIS FOG LAYER DISSIPATING
AROUND 20Z (+/- 1HRS) LEADING TO VFR CONDITIONS WITH STRONG
NORTHERLY WINDS WITH GUSTS UP TO 25KTS. WINDS ARE FORECAST TO REMAIN
STRONG THROUGH THE NIGHT, ESPECIALLY ALONG COASTAL TERMINALS. HREF,
NAM, AND WRF DATA SHOW A CLOUD LAYER REFORMING TO IFR CONDITIONS
TONIGHT BETWEEN 00-03Z WITH FOG FORMATION POSSIBLE AFTER 12Z. THIS
STRATUS AND FOG IS FORECASTED TO MIX OUT AGAIN AROUND 19Z (+/-1HR)
ON 03/09.
INLAND TERMINALS WILL EXPERIENCE CLEARER SKIES WITH VARIABLE,
TERRAIN DRIVEN WINDS. STRONG WINDS ALONG RIDGETOPS COULD MIX DOWN TO
TERMINALS, INCREASING THE POTENTIAL FOR LLT NEAR TERRAIN. RIVER
VALLEY FOG IS EXPECTED OVERNIGHT. HOWEVER, HIGH CONFIDENCE (>70%)
FOR KUKI REMAINING CLEAR.
MARINE
MARINE CONDITIONS WILL REMAIN HAZARDOUS FOR SMALL CRAFT
THROUGH TODAY. STRONG NORTHERLIES WILL CREATE STEEP WIND WAVES
COMBINING WITH MID-SHORT PERIOD NW SWELL. A WEAK COLD FRONT PASSING
OVER NW CA WILL CAUSE AN INCREASE IN THE PRESSURE GRADIENT,
DRASTICALLY STRENGTHENING WINDS MONDAY MORNING. GALE WARNINGS HAVE
BEEN HOISTED FOR ALL COASTAL WATERS THROUGH MONDAY. NEAR STORM FORCE
WIND GUSTS (~45KTS) ARE POSSIBLE MONDAY, NEAR AND DOWNWIND OF CAPE
MENDOCINO AS A WEAK FRONTAL SYSTEMS PASSES OVER THE AREA.
LARGE STEEP SEAS ARE EXPECTED TO BUILD, REACHING 13-15 FEET MONDAY
EVENING THROUGH TUESDAY, HIGHEST SOUTH OF CAPE MENDOCINO. THESE
STRONG WINDS WILL EASE MIDWEEK. MODERATE WINDS WILL LIKELY CONTINUE
SOUTH OF CAPE MENDO. STEEP SEAS WILL BE SLOWER TO SUBSIDE. A SERIES
OF MID AND LONG PERIOD SWELL GROUPS ALSO PROPAGATE INTO THE WATERS
MID TO LATE WEEK.
EKA WATCHES/WARNINGS/ADVISORIES
CA...
NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY UNTIL 5 AM PDT MONDAY FOR PZZ450-470.
GALE WARNING FROM 5 AM MONDAY TO 4 AM PDT TUESDAY FOR
PZZ450-470.
SMALL CRAFT ADVISORY UNTIL 11 PM PDT THIS EVENING FOR
PZZ455.
GALE WARNING FROM 11 PM THIS EVENING TO 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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