240
FXUS66 KEKA 261008
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
208 AM PST MON JAN 26 2026
SYNOPSIS
DRY CONDITIONS WILL CONTINUE ACROSS THE AREA TODAY. A
FRONTAL BOUNDARY WILL BRING GUSTY TO STRONG SOUTH WINDS LATE
TONIGHT THROUGH TUESDAY AFTERNOON. LIGHT TO LOCALLY MODERATE
SHOWERS ON TUESDAY THROUGH TUESDAY NIGHT, WITH LINGERING SHOWERS
THROUGH WEDNESDAY AFTERNOON. RAIN CHANCES RETURNS FRIDAY AND
THROUGH THE WEEKEND AS ANOTHER FRONTAL SYSTEM APPROACHES FROM THE
WEST.
KEY MESSAGES
* GUSTY TO STRONG SOUTH WIND GUSTS FROM 35 TO 50 MPH ARE EXPECTED
LATE TONIGHT THROUGH TUESDAY AFTERNOON OVER THE COASTAL
HEADLANDS AND EXPOSED RIDGES IN DEL NORTE AND HUMBOLDT.
* LIGHT TO LOCALLY MODERATE SHOWERS ARE FORECAST ON TUESDAY, WITH
LINGERING SHOWERS THROUGH WEDNESDAY AFTERNOON.
DISCUSSION
PARTLY TO MOSTLY CLOUDY SKIES WERE OBSERVED ACROSS
THE NORTHERN PORTION OF THE AREA OVERNIGHT AS A WEAK SHORTWAVE
MOVES THROUGH, WHILE CLEAR SKIES HAS DEVELOPED FOR MENDOCINO AND
LAKE COUNTIES. LOW DEWPOINTS, CLEAR SKIES, AND LIGHT WINDS ARE
PROMOTING EFFICIENT RADIATIONAL COOLING ACROSS THE INTERIOR
VALLEYS. A COLD WEATHER ADVISORY IS IN EFFECT UNTIL 9AM THIS
MORNING FOR APPARENT TEMPERATURES AT OR BELOW 30F DEGREES ACROSS
THE INTERIOR VALLEYS IN THE SOUTHERN PORTIONS OF MENDOCINO AND
SOUTHERN LAKE COUNTIES. OPTED NOT TO INCLUDE THE INTERIOR VALLEYS
IN TRINITY DUE TO SLIGHTLY WARMER CONDITIONS COMPARED WITH THE
LAST 24 HOURS, WHERE LOW TEMPERATURES IN THE UPPER 10S TO LOW 20S
WERE OBSERVED.
HIGH PRESSURE BUILD BACK QUICKLY IN THE WAKE OF THE PASSING
SHORTWAVE TROUGH TODAY, WITH CONDITIONS SLIGHTLY WARMING UP. THE
PATTERN SHIFTS AS THE RIDGE FINALLY BREAKS DOWN GIVING WAY TO A
BROAD, UPPER-LEVEL TROUGH MOVES INTO THE NEPAC. A SHORTWAVE
TROUGH AND COLD FRONT EMBEDDED TO TROUGH WILL APPROACHES THE AREA
TONIGHT THROUGH TUESDAY. A COLD FRONT WILL TRAVERSE THE AREA FROM
WEST ON TUESDAY. THIS WILL BRING LIGHT TO LOCALLY MODERATE SHOWERS
ON TUESDAY. GENERALLY 0.10 TO 0.50 INCH IS FORECAST FROM LATE
TUESDAY AFTERNOON THROUGH WEDNESDAY AFTERNOON, WITH THE BULK OF
THE PRECIPITATION EXPECTED TUESDAY AFTERNOON THROUGH TUESDAY
NIGHT. LOCALLY 1 TO 1.5 INCHES IS FORECAST OVER THE SOUTH-
SOUTHWEST WINDWARD-FACING TERRAIN IN DEL NORTE AND HUMBOLDT
COUNTIES, WITH THE HIGHEST AMOUNTS IN THE KING RANGE. THERE ARE
NO MAJOR IMPACTS EXPECTED WITH THIS WEATHER SYSTEM; IF PRECIPITATION
DOES OCCUR, IT WOULD BE MORE BENEFICIAL THAN IMPACTFUL, ESPECIALLY
AFTER THE RECENT DRY SPELL.
IN ADDITION, A FRONTAL BOUNDARY WILL BRING GUSTY TO STRONG
SOUTHERLY WINDS LATE TONIGHT THROUGH TUESDAY AFTERNOON. GUSTS
FROM 35 TO 50 MPH ARE LIKELY OVER THE COASTAL HEADLANDS AND
EXPOSED RIDGES IN DEL NORTE AND HUMBOLDT COUNTIES. AS RESULTS, A
WIND ADVISORY IS IN EFFECT FROM 10 PM TONIGHT THROUGH 4 PM PST
TUESDAY.
HIGH PRESSURE IS EXPECTED TO RISES OVER THE AREA ON THURSDAY,
PROMOTING DRY WEATHER AND ABOVE NORMAL TEMPERATURES. ENSEMBLES
MODELS, AND WPC CLUSTER ANALYSIS SUGGESTS (25-35%) ANOTHER
SHORTWAVE TROUGH MAY BRING ANOTHER CHANCE OF LIGHT SHOWERS FOR THE
NORTHERN PORTION OF THE AREA BY LATE IN THE WORK WEEK AND/OR
THROUGH THE WEEKEND. THE EPS AND GEFS SHOW THE NEXT WEEKEND RAIN
TOTALS LOOK TO BE BELOW 0.1" FOR EACH 24 HOURS PERIOD FRIDAY-
SUNDAY. /ZVS
AVIATION...(6Z TAFS)
VFR CONDITIONS ARE EXPECTED TO PREVAIL
OVERNIGHT WITH ONLY HIGH CLOUDS EXPECTED. SOME PATCHY GROUND FOG IS
POSSIBLE, BUT IMPACTS TO THE TERMINALS ARE EXPECTED TO BE MINOR. ANY
FOG WILL DISSIPATE SHORTLY AFTER SUNRISE. SOUTHERLY WINDS ARE LIKELY
ACROSS THE AREA IN THE AFTERNOON AND COULD BE BREEZY AROUND CEC
WITH GUSTS POSSIBLY UP TO 20 KTS. JB
MARINE
SOUTHERLY WINDS WILL INCREASE ACROSS THE WATERS TODAY
WITH WIDESPREAD GUSTS OF 20-25 KTS LIKELY BY THE AFTERNOON. WINDS
CONTINUE TO INCREASE TONIGHT INTO TUESDAY, WITH GALES LIKELY IN THE
OUTER WATERS AND NEARSHORE FROM CAPE MENDOCINO NORTHWARD. STEEP SEAS
OF 6-10 FT ARE POSSIBLE WITH THESE WINDS. LOCALLY HIGHER SEAS OF UP
TO 14 FT ARE POSSIBLE IN THE NORTHERN OUTER WATERS. WINDS EASE BELOW
GALE FORCE TUESDAY NIGHT AND SHORT PERIOD SEAS WILL START TO
SUBSIDE. HOWEVER, A LARGE, LONG PERIOD WESTERLY SWELL WILL ARRIVE
WEDNESDAY AFTERNOON INTO THURSDAY, BRINGING COMBINED SEAS OF 14-16
FT. WINDS REMAIN SOUTHERLY FOR THE REMAINDER OF THE WEEK AND ARE
LIKELY TO REMAIN BREEZY NORTH OF CAPE MENDOCINO. JB
EKA WATCHES/WARNINGS/ADVISORIES
CA...
WIND ADVISORY FROM 4 AM TO 3 PM PST TUESDAY FOR CAZ101.
WIND ADVISORY FROM 1 AM TO 3 PM PST TUESDAY FOR CAZ102-105-
106.
WIND ADVISORY FROM 10 PM MONDAY TO 4 PM PST TUESDAY FOR
CAZ104.
COLD WEATHER ADVISORY UNTIL 9 AM PST MONDAY FOR CAZ113-115.
NORTHWEST CALIFORNIA COASTAL WATERS...
GALE WARNING FROM 3 AM TO 3 PM PST TUESDAY FOR PZZ450-470-
475.
SMALL CRAFT ADVISORY FROM 3 AM TO 3 PM PST TUESDAY FOR
PZZ455.
SMALL CRAFT ADVISORY FROM 10 AM MONDAY TO 3 AM PST TUESDAY
FOR PZZ470-475.
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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