765
FXUS66 KEKA 072059
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
1259 PM PST SUN DEC 7 2025
SYNOPSIS
A PASSING WARM FRONT WITH LIGHT RAIN AND DRIZZLE IS
PASSING OVER DEL NORTE AND HUMBOLDT COUNTIES TODAY. GENERALLY DRY
WEATHER CONDITIONS ARE EXPECTED TO PREVAIL ACROSS NW CA THIS
COMING WEEK, WITH PERIODS OF LIGHT RAIN/DRIZZLE CONTINUING FOR THE
NORTH COAST. BUILDING HIGH PRESSURE WILL BRING MUCH ABOVE NORMAL
TO RECORD HIGH TEMPERATURES THROUGH THE WEEK.
DISCUSSION
LIGHT SHOWERS TO LIGHT DRIZZLE CAN BE EXPECTED TO
CONTINUE ALONG THE NORTH COAST, MAINLY IN DEL NORTE. THE FAR
SOUTHERN PERIPHERY OF A STRONG STORM SYSTEM TO THE NORTH WILL
MAINTAIN CHANCES FOR SOME SHOWERS AND AND LIGHT DRIZZLE THROUGH
THURSDAY FOR THESE DESCRIBED AREAS. REFS PROBABILITIES FOR 24
RAINFALL OVER 0.1 INCH REACH 30 TO 50% THROUGH MONDAY FOR DEL
NORTE COUNTY. CHANCES QUICKLY DROP TO ZERO FURTHER SOUTH. PERIODIC
PERSISTENT AND ACCUMULATING LIGHT DRIZZLE IS LIKELY ALONG THE
NORTH COAST HOWEVER. IT WILL REMAIN DRY ELSEWHERE WITH INCREASING
HIGH TEMPERATURES.
THE PERSISTENT RIDGE OF HIGH PRESSURE SOUTHWEST OF THE REGION
RESPONSIBLE FOR BLOCKING STRONGER WEATHER SYSTEMS WILL STRENGTHEN AND
NOSE EASTWARD THROUGH THE WORKWEEK. SIGNIFICANT WARMING WILL OCCUR
AS A RESULT. THE CURRENT FORECAST YIELDS HIGH TEMPERATURES IN THE
INTERIOR REACHING 10 TO 15 TO LOCALLY UP TO 20 DEGREES ABOVE
CLIMATOLOGICAL NORMS MID TO LATE THIS WEEK AND INTO THE WEEKEND.
NBM SHOWS A HIGH PROBABILITY (70 TO 80%) FOR THE WARMER INTERIOR
VALLEYS TO EXCEED 70 F THURSDAY AND ESPECIALLY FRIDAY (80 TO
90%). THIS WOULD LIKELY BREAK HIGH TEMPERATURE RECORDS FOR UKIAH
IF THE FORECAST HOLDS.
SOME ENSEMBLES ARE INDICATING A WETTER PATTERN CHANGE THROUGH
NEXT WEEKEND. THERE IS A GREAT DEAL OF VARIABILITY, WITH
UNCERTAINTY IN HOW QUICK THE RIDGE WEAKENS, BUT SOME (15%) OF THE
ENSEMBLE MEMBERS SHOW OVER 1 INCH OF 24 HOUR RAINFALL. JJW
AVIATION
MVFR CEILINGS ARE BEING OBSERVED AT THE COASTAL
TERMINALS AS LIGHT RAIN SHOWERS PERIODICALLY IMPACT THE AREA.
THESE WILL CONTINUE THROUGH THE AFTERNOON. IFR CEILINGS ARE
POSSIBLE LATER THIS AFTERNOON AND EVENING, ESPECIALLY AROUND CEC,
WITH MORE CONSISTENT RAINFALL. LITTLE RAIN IS EXPECTED OUTSIDE THE
HUMBOLDT AND DEL NORTE COASTS AND GENERALLY VFR CONDITIONS ARE
FORECAST THROUGH THE DAY. SOME INTERIOR VALLEYS COULD SEE STRATUS
AND FOG AGAIN TONIGHT, BUT CONFIDENCE IS LOW ON UKI SEEING ANY. JB
MARINE
GENERALLY LIGHT WINDS ARE FORECAST THROUGH AT LEAST THE
MIDDLE OF NEXT WEEK, WITH SOUTH WINDS FORECAST NORTH OF CAPE
MENDOCINO AND WEST-NORTHWEST WINDS FORECAST SOUTH OF THE CAPE. A MID
PERIOD NORTHWEST SWELL HAS PEAKED AND HAS STARTED TO DECAY. SEAS
SUBSIDE INTO EARLY MONDAY AS THIS SWELL DECAYS. ANOTHER MID-PERIOD
NORTHWEST SWELL WILL FILL IN MONDAY AFTERNOON AND EVENING, PEAKING
AT 7-9 FT AT 13 SECONDS BY TUESDAY. COMBINED SEAS MAY BRIEFLY REACH
OR EXCEED 10 FT TUESDAY. ADDITIONAL MID-PERIOD NORTHWEST SWELLS WILL
CONTINUE TO FILL IN THROUGH THE WEEK. JB
EKA WATCHES/WARNINGS/ADVISORIES
CA...
NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
NONE.
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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