391
FXUS66 KEKA 102059
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
159 PM PDT TUE MAR 10 2026
SYNOPSIS
COOL AND BREEZY CONDITIONS ARE EXPECTED AGAIN TODAY
WITH FROST POSSIBLE AGAIN TONIGHT IN THE COLDER LOCATIONS. HIGH
PRESSURE IS EXPECTED TO BRING WARMING INLAND TEMPERATURES WITH
HIGHS IN THE 80S BY EARLY NEXT WEEK. MORE CLOUDS, SLIGHTLY COOLER
TEMPERATURES AND A CHANCE OF RAIN IS EXPECTED IN NORTHERN HUMBOLDT
AND DEL NORTE COUNTIES FRIDAY AND SATURDAY.
DISCUSSION
HIGH PRESSURE IS STARTING TO BUILD IN, BUT REMAINS
FAIRLY FLAT WITH A WEATHER SYSTEM MOVING BY TO THE NORTH OF THE
AREA. THERE IS EXPECTED TO BE SOME CLOUDS IN DEL NORTE AND
NORTHERN HUMBOLDT COUNTIES TONIGHT, ALTHOUGH THESE WILL MAINLY BE
HIGH CLOUDS. FARTHER SOUTH CLEAR SKIES AND A COOL AIRMASS WILL
LIKELY ALLOW SOME FROST TO FORM IN THE MORE PROTECTED VALLEYS OF
MENDOCINO AND COASTAL HUMBOLDT COUNTIES AS WELL AS NORTHERN LAKE
COUNTY. SO HAVE ISSUED A FROST ADVISORY FOR THESE AREAS. THIS MAY
NEED TO BE EXPANDED SLIGHTLY IF TEMPERATURES START COOLING MORE
QUICKLY THAN EXPECTED. COLD TEMPERATURES ARE ALSO EXPECTED IN
INTERIOR HUMBOLDT AND TRINITY COUNTIES, BUT THE OFFICIAL GROWING
SEASON HAS NOT STARTED SO WILL NOT ISSUE ANY ADVISORIES. WEDNESDAY
MORNING IS EXPECTED TO BE THE COLDEST MORNING OF THE WEEK. WEDNESDAY
HIGH TEMPERATURES ARE EXPECTED TO WARM A FEW DEGREES OVER TODAY.
DEL NORTE COUNTY MAY SEE SOME HIGH OR MIDDLE CLOUDS AS A SHORTWAVE
MOVES BY TO THE NORTH. THIS MAY EVEN BRING A STRAY SHOWER OR TWO
TO DEL NORTE COUNTY. WEDNESDAY AFTERNOON MOST AREAS ARE EXPECTED
TO SEVERAL DEGREES WARMER THAN TODAY.
WEDNESDAY NIGHT AND THURSDAY A WARMER AIRMASS STARTS TO SLOWLY
BUILD IN. THERE IS THE POTENTIAL FOR A RETURN OF COASTAL STRATUS
OVERNIGHT, BUT CONFIDENCE IS LOW ON THIS. FROST IS LOOKING LESS
LIKELY THURSDAY MORNING. MOST INLAND AREAS ARE EXPECTED TO SEE 5
TO 10 DEGREES OF WARMING OVER WEDNESDAY. DEL NORTE COUNTY MAY BE
THE EXCEPTION IF THERE ARE CLOUDS LINGERING. FRIDAY AND SATURDAY A
SHORTWAVE MOVING BY TO THE NORTH DRAGS A DECAYING FRONTAL BOUNDARY
ACROSS NORTHERN HUMBOLDT AND DEL NORTE COUNTIES. THIS MAY COOL
TEMPERATURES A FEW DEGREES IN THESE AREAS OR AT LEAST SLOW DOWN
THE WARMING. SOME RAIN OR DRIZZLE IS POSSIBLE ALONG THE NORTHERN
HUMBOLDT COAST AND IN DEL NORTE COUNTY. FARTHER SOUTH IN SOUTHERN
MENDOCINO COUNTY AND LAKE COUNTY THE WARMING TREND IS EXPECTED TO
CONTINUE.
THE WARMING TREND IS EXPECTED TO SPREAD ACROSS THE REST OF THE
SUNDAY AND INTO EARLY NEXT WEEK. THIS MAY EXPAND OUT OF THE COAST
ON SUNDAY AND POSSIBLY MONDAY. OFFSHORE FLOW IS EXPECTED TO WEAKEN
STARTING ON MONDAY AND THIS MAY KEEP THE COAST COOLER THAN
EXPECTED. INLAND AREAS, ESPECIALLY IN INTERIOR MENDOCINO AND LAKE
COUNTIES MAY SEE SOME OF THE WARMEST TEMPERATURES SO FAR THIS
SPRING. THERE IS A 50 TO 60 PERCENT CHANCE OF UKIAH AND AN 80
PERCENT CHANCE OF CLEARLAKE EXCEEDING 85 DEGREES ON MONDAY.
MONDAY IS EXPECTED TO BE THE HOTTEST DAY IN THE NEXT WEEK,
ALTHOUGH TUESDAY COULD BE JUST ABOUT AS HOT IN LAKE COUNTY. MKK
AVIATION
GUSTY N-NW WINDS EXPECTED TIL 03Z, OTHERWISE VFR
CONDITIONS EXPECTED THROUGH THE TAF CYCLE. SHALLOW TURBULENCE OVER
THE COASTAL MOUNTAINS, SPECIFICALLY SW HUMBOLDT, REMAINS POSSIBLE
TIL 08Z. OTHERWISE, LIGHTER WINDS ARE EXPECTED TO PREVAIL INTO
WED. CHANCE FOR COASTAL STRATUS WITH CEILINGS < 1000 FEET AGL
INCREASES TO 60% WED NIGHT. LOWER CHANCES (20%) FOR IFR VSBY N
MIST/FOG BY EARLY THU AT COASTAL TERMINALS (KACV AND KCEC).
MARINE
LINGERING GALE GUSTS AND LARGE STEEP WAVES ARE FORECAST
IN THE SOUTHERN WATERS THROUGH THIS EVENING AS A FRONTAL SYSTEMS
DEPARTS TO THE SOUTHEAST. STEEP WAVES MAY CONTINUE PAST THE END OF
THE GALE WARNING AND A HAZARDOUS SEAS WARNING HAS BEEN HOISTED
FOR PZZ455 FOR LATER TONIGHT. WIND AND SEAS WILL DROP BELOW
CRITERIA FOR WARNINGS ON WED BUT WINDS AND SEAS WILL REMAINS
SUFFICIENTLY ELEVATED TO WARRANT ADVISORIES FOR SMALL CRAFT FOR
PZZ455 AND PZZ475. NORTH WINDS ARE EXPECTED TO DIMINISH TONIGHT
AND WED FOR THE NORTHERN WATER AND REMAIN BELOW ADVISORY LEVEL
THROUGH FRI. NORTHERLY WINDS INCREASE THROUGHOUT ON SATURDAY AS A
FRONTAL BOUNDARY LIFTS OUT TO THE NE AND HIGH PRESSURE BUILDS TO
THE NW. A SHORT TO MID PERIOD NW SWELL AROUND 7 TO 9 TONIGHT AND
WED IS FORECAST TO SLOWLY DECAY THU AND FRI. LONG PERIOD SW SWELL
IS FORECAST TO BUILD TO 2 FT THU AND FRI.
EKA WATCHES/WARNINGS/ADVISORIES
CA...
FROST ADVISORY FROM 3 AM TO 9 AM PDT WEDNESDAY FOR CAZ103-
109>111-114.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY UNTIL 3 AM PDT WEDNESDAY FOR PZZ450-
470.
GALE WARNING UNTIL 9 PM PDT THIS EVENING FOR PZZ455.
HAZARDOUS SEAS WARNING FROM 9 PM THIS EVENING TO 3 AM PDT
WEDNESDAY FOR PZZ455.
GALE WARNING UNTIL 3 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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