973
FXUS66 KEKA 110657
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
1157 PM PDT TUE MAR 10 2026
SYNOPSIS
AFTER A CHILLY WEDNESDAY MORNING, TEMPERATURES WILL
STRONGLY REBOUND TO BEGIN AN EXTENDED PERIOD OF WARMER
TEMPERATURES. NORTHERN HUMBOLDT AND DEL NORTE COUNTIES WILL
OCCASIONALLY SEE CHANCES FOR LIGHT SHOWERS AND MAINLY LIGHT
DRIZZLE FROM CLIPPING WEATHER SYSTEMS. MORE SIGNIFICANT WARMING IS
LIKELY LATE THIS WEEKEND AND NEXT WEEK.
DISCUSSION
LIGHTENING WINDS AND CLEARING SKIES ALLOWED FOR COOL
TO COLD TEMPERATURES AND THE FORMATION OF FROST, INCLUDING OVER
AREAS WHERE THE OFFICIAL GROWING SEASON HAS BEGUN. FROST
ADVISORIES HAVE BEEN ISSUED OVER PORTIONS OF COASTAL AND INTERIOR
HUMBOLDT AND MENDOCINO COUNTIES WHERE THE GROWING SEASON HAS
BEGUN.
WEDNESDAY MORNING IS THE COLDEST OF THE EXTENDED FORECAST. A WEAK
WEATHER SYSTEM WILL CLIP THE AREA WEDNESDAY THROUGH THURSDAY,
INCREASING CLOUDCOVER AND BRINING CHANCES FOR A FEW LIGHT SHOWERS
OVER DEL NORTE AND LIGHT COASTAL DRIZZLE THROUGH THE HUMBOLDT COAST.
A DOMINANT RIDGE OF HIGH PRESSURE WILL ALSO BE BUILDING OVER THE
WEST THROUGH THE WEEK. ANOTHER WEAK, CLIPPING FRONT WILL TEMPORARILY
WEAKEN THE RIDGE AND WILL BRING MORE CHANCES FOR LIGHT RAINFALL OR
DRIZZLE LATE FRIDAY AND SATURDAY. CHANCES FOR ONLY 0.1 INCH OR MORE
OF RAINFALL ARE A LITTLE HIGHER FOR THIS SYSTEM FROM NORTHERN
HUMBOLDT AND MOSTLY DEL NORTE (50-75%), BUT ONLY TRACE AMOUNTS MAY
BE RECORDED FOR MOST.
THERE IS HIGH CONFIDENCE THE RIDGE WILL BEGIN TO GREATLY AMPLIFY
THROUGH THE END OF THE WEEKEND AND NEXT WEEK. SOME MINOR TO
LOCALLY MODERATE HEATRISK CONDITIONS ARE EVEN POSSIBLE EARLY NEXT
WEEK OVER THE INTERIOR, MAINLY SOUTH THROUGH MENDOCINO AND LAKE
COUNTIES. NBM CHANCES FOR MAXIMUM HIGH TEMPERATURES INCREASE TO
MODERATE TO HIGH (60 TO 90%) SUNDAY FOR THESE SOUTHERN ZONES.
PROBABILITIES ARE HIGHER EARLY TO MID NEXT WEEK. CHANCES FOR HIGH
TEMPS OVER 85 ARE HIGHEST MONDAY, PARTICULARLY OVER LAKE COUNTY
(85%).
AVIATION
VFR CONDITIONS EXPECTED THROUGH THE TAF CYCLE. SHALLOW
TURBULENCE OVER THE COASTAL MOUNTAINS, SPECIFICALLY FOR 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 FOR THE OUTER WATERS AND A HAZARDOUS SEAS WARNING
HAS BEEN HOISTED FOR PZZ455 THROUGH THIS MORNING. WIND AND SEAS WILL
DROP BELOW CRITERIA FOR WARNINGS ON WED BUT WINDS AND SEAS WILL
REMAINS SUFFICIENTLY ELEVATED TO WARRANT ADVISORIES FOR SMALL CRAFTS
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.
HAZARDOUS SEAS WARNING UNTIL 3 AM PDT WEDNESDAY FOR PZZ455.
SMALL CRAFT ADVISORY FROM 3 AM TO 11 AM PDT WEDNESDAY FOR
PZZ455-475.
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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