963
FXUS66 KEKA 042243
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
343 PM PDT SUN OCT 4 2026
KEY MESSAGES
* UNSEASONABLY HOT TEMPERATURES WITH NEAR RECORD HIGHS CONTINUE TO
GENERATE MODERATE HEATRISK ACROSS THE INTERIOR THROUGH MID
WEEK.
* SHALLOW, DIURNAL MARINE LAYER PERSISTING ALONG THE COAST THROUGH
THE WEEKEND.
* DRY CONDITIONS EXPECTED THROUGH THIS COMING WORK WEEK.
SYNOPSIS
AN UPPER LEVEL RIDGE OVER THE FOUR CORNERS CONTINUES
TO INFLUENCE OUR AREA THIS WEEK AND WILL CREATE UNSEASONABLY HOT
AND DRY CONDITIONS FOR THE INTERIOR. THE ANTICYCLONIC FLOW HAS
PUSHED MOISTURE PLUMES INTO THE COASTAL AREAS TODAY WHICH HAS
EASED SOME OF THE FORECASTED HEATING BUT CONTINUES TO DRIVE
OVERCAST SKIES ALONG THE NORTH COAST.
DISCUSSION
A CONSISTENT SYNOPTIC PATTERN REMAINS OVERHEAD FORCING
RELATIVELY SIMILAR CONDITIONS FOR THE PAST FEW DAYS, EXPECTED TO
PERSIST INTO THE WORK WEEK. INTERIOR AREAS REMAIN VERY HOT, WITH
CLOSE TO RECORD BREAKING TEMPERATURES AND DRY. THERMAL BELTS
REMAIN AT MIDSLOPE KEEPING AREAS ABOVE WARM OVERNIGHT. LIGHT
TERRAIN-DRIVEN WINDS ARE EXPECTED DUE TO A STABLE ATMOSPHERE AND
MINIMAL FORCING. COASTAL AREAS OF DEL NORTE AND N. HUMBOLDT CAN
EXPECT CONTINUED OVERCAST CONDITIONS WITH AREAS OF DENSE FOG AND
LIGHT DRIZZLE. THE MENDOCINO COAST HAS ALSO EXPERIENCED STEADY
OVERCAST CONDITIONS DUE TO THE HIGH PRESSURE CENTERED OVER THE
FOUR CORNERS, ANTICYCLONIC FLOW ALOFT PULLING SOME OF THE EXTRA
TROPICAL MOISTURE OVER THE WESTERN MOST AREAS.
THIS PATTERN IS EXPECTED TO CONTINUE INTO MOST OF THE COMING WEEK AS
THE UPPER LEVEL RIDGE STAYS FIRMLY IN PLACE. THE ONLY SIGN OF RELIEF
SEEMS TO BE NEXT WEEKEND. THE GFS AND ECMWF ENSEMBLES SHOW AN UPPER
LEVEL TROUGH DIPPING INTO THE AREA SOMETIME LATE SATURDAY INTO
MONDAY MORNING. THERE IS A EVEN A CHANCE OF RAIN RETURNING TO THE
AREA DURING THIS TIME, YET ANY DETAILS ARE NOT CLEAR AT THIS MOMENT.
WHILE IT IS IMPORTANT TO REMEMBER THIS IS THE FAR EXTENDED FORECAST,
THE POSSIBILITY REMAINS. DS/EYS
AVIATION
LIFR CONDITIONS WILL RETURN FOR KACV AND KCEC THIS
EVENING AFTER A FEW HOURS OF VFR AT KCEC AND AN EVEN
LONGER/IMPROVED MORNING THROUGH AFTERNOON FOR KACV. A FOG BANK
WITH VARIABLE VISIBILITIES CONTINUES TO EBB AND FLOW OVER THE
TERMINALS. PERIODS OF 1/4SM FG WILL OSCILLATE WITH VISIBILITIES UP
TO 2SM THROUGH THE EVENING BEFORE DENSE FOG SETS IN AROUND 04-06Z.
WINDS WILL REMAIN LIGHT (<5KT) BOTH ALONG THE COAST AND INLAND.
COASTAL WINDS WILL REMAIN NORTHERLY AT KCEC AND WESTERLY AT KACV FOR
A FEW MORE HOURS BEFORE CALMING AND BECOMING VARIABLE AT TIMES
OVERNIGHT.
MARINE
WINDS OUT OF THE NORTH BUILD AGAIN THIS EVENING AND
BRING SMALL CRAFT ADVISORY CONDITIONS WITH THEM. WIND WAVES WILL
STEEPEN, BRINGING GROUPS OF 6-9 FEET AT 6-9 SECONDS. INITIALLY THE
SOUTHERN OUTER WATER ZONE PZZ475, WILL CARRY THE SMALL CRAFT
ADVISORY BEFORE THE MAJORITY OF THE NORTHERN OUTER WATERS IN ZONE
PZZ470, ALSO JOINS THE SMALL CRAFT ADVISORY LATER TONIGHT.
OTHERWISE, A MID PERIOD SOUTHERLY SWELL PERSISTS BUT WITH MINIMAL
EFFECT.
EKA WATCHES/WARNINGS/ADVISORIES
CA...
HEAT ADVISORY UNTIL 11 PM PDT MONDAY FOR CAZ112-113-118>120.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY UNTIL 9 PM PDT MONDAY FOR PZZ470.
SMALL CRAFT ADVISORY UNTIL 9 PM PDT MONDAY 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.
VISIT US AT HTTPS://WWW.WEATHER.GOV/EUREKA
FOLLOW US ON FACEBOOK AND TWITTER AT:
HTTPS://WWW.FACEBOOK.COM/NWSEUREKA
HTTPS://WWW.TWITTER.COM/NWSEUREKA
FOR FORECAST ZONE INFORMATION
SEE THE FORECAST ZONE MAP ONLINE:
HTTPS://WWW.WEATHER.GOV/IMAGES/EKA/ZONEMAP.PNG
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page