925
FXUS66 KEKA 260720
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
1220 AM PDT WED AUG 26 2026
KEY MESSAGES
* INTERIOR AREAS CONTINUE TO SEE SLIGHTLY BELOW NORMAL TEMPERATURES
THROUGH THIS WEEKEND.
* COASTAL AREAS CONTINUE TO SEE STRATUS CONTINUING INTO THE
AFTERNOONS FOR THE REMAINDER OF THE WEEK.
* TROPICAL MOISTURE MAY BRING A FEW SHOWERS TO MENDOCINO AND LAKE
COUNTIES THURSDAY AND THURSDAY AND FRIDAY.
SYNOPSIS
SLIGHTLY BELOW NORMAL INTERIOR TEMPERATURES LIKELY
THROUGH THE WEEKEND. COASTAL STRATUS REMAINS PERSISTENT THROUGH THE
REST OF THE WEEK. TROPICAL MOISTURE ARRIVES TO THE AREA THURSDAY AND
FRIDAY WHICH MAY BRING RAIN SHOWERS TO MENDOCINO AND LAKE COUNTIES.
DISCUSSION
AN UPPER-LEVEL TROUGH REMAINS IN PLACE OVER THE
PACIFIC NORTHWEST. THIS HAS MODERATED INTERIOR TEMPERATURES WITH
HIGHS IN THE HIGH 80S TO LOW 90S FOR MOST INTERIOR VALLEYS. THE
COAST HAS BEEN EXPERIENCING MORE PERSISTENT COASTAL STRATUS WITH
MINIMAL AND BRIEF AFTERNOON CLEARING. THIS IS EXPECTED TO KEEP
COASTAL TEMPERATURES IN THE LOW TO MID 60S THROUGH THE END OF THE
WEEK. A DEEP MARINE LAYER ALSO BRINGS STRATUS FARTHER INLAND, WHICH
IS MODERATING SOME FIRE WEATHER CONCERNS, ESPECIALLY CLOSER TO THE
COAST. THIS TREND CONTINUES FOR THE REMAINDER OF THE WEEK.
THURSDAY INTO FRIDAY, AS SOUTHWESTERLY FLOW ALOFT REMAINS IN PLACE
OVER THE AREA, MOISTURE FROM THE REMNANTS OF TROPICAL STORM ISELLE,
CURRENTLY OFF THE COAST OF MEXICO, WILL ARRIVE INTO CENTRAL AND
NORTHERN CALIFORNIA. IT IS UNCERTAIN JUST HOW MUCH MOISTURE WILL BE
OVER NORTHWESTERN CALIFORNIA, WITH MODELED PRECIPITABLE WATER VALUES
RANGING FROM ABOUT 0.8 TO 1.5 INCHES OVER SOUTHERN MENDOCINO AND
SOUTHERN LAKE COUNTIES BY FRIDAY MORNING. SHOULD THIS BE ON THE
HIGHER END, SHOWERS ARE POSSIBLE OVER THE SOUTHERN PORTIONS OF THE
AREA. OTHERWISE, MUCH OF THIS MOISTURE IS UNLIKELY TO REACH THE
GROUND WITH DRIER LOWER LEVELS. AT THIS POINT, INSTABILITY IS NEAR
ZERO WHICH WILL LIMIT ANY THUNDERSTORM CHANCES AND NBM CURRENTLY HAS
THUNDERSTORM CHANCES AT LESS THAN 5%. THIS WILL NEED TO BE WATCHED
CLOSELY OVER THE COMING DAYS.
THIS WEEKEND, A TROUGH IN THE PACIFIC NORTHWEST REBUILDS AND IS
MODELED TO BE SLIGHTLY STRONGER AND FARTHER SOUTH. THIS WILL
CONTINUE THE MODERATED INTERIOR TEMPERATURES (HIGHS IN THE 80S TO
LOW 90S), AND POSSIBLY BRING COASTAL DRIZZLE AND EVEN MORE
PERSISTENT COASTAL STRATUS INTO THE AFTERNOONS. COASTAL HIGH
TEMPERATURES ARE ALSO FORECAST TO DROP INTO THE HIGH 50S TO LOW 60S.
EARLY NEXT WEEK, A STRONGER TROUGH DROPS FROM THE PACIFIC NORTHWEST.
THIS IS EXPECTED TO BRING COOLER TEMPERATURES AND COULD EVEN BRING
EARLY SEASON RAIN TO THE NORTHERN PORTIONS OF THE AREA. STAY TUNED!
/JB
AVIATION...(6Z TAFS)
A DEEP MARINE LAYER HAS REESTABLISHED
ITSELF ALONG THE COAST BRINGING MVFR STRATUS IMPACTS TO ACV AND
CEC. IFR STRATUS IS POSSIBLE EARLY WEDNESDAY BUT THESE WILL LIFT
AFTER SUNRISE. SCATTERING IS POSSIBLE FOR A FEW HOURS IN THE
AFTERNOON, BUT CLOUDS MAY ONLY RETREAT TO THE IMMEDIATE COAST AND
IMP. FOR THE INTERIOR, OUTSIDE THE NEAR-COAST RIVER VALLEYS, VFR
CONDITIONS WILL PREVAIL FOR THE NEXT 24 HOURS. /JB
MARINE
LIGHT WINDS CONTINUE TODAY OUTSIDE OF BREEZY NORTHERLIES
IN THE LEE OF CAPE MENDOCINO. OUTSIDE THE LEE OF THE CAPE, SEAS ARE
DOMINATED BY A MID PERIOD SOUTHERLY SWELL AT AROUND 3 TO 4 FT.
NORTHERLY WINDS INCREASE THURSDAY INTO FRIDAY WITH WIDESPREAD GUSTS
OF 20 TO 30 KTS LIKELY FOR THE OUTER WATERS. DESPITE LIGHTER WINDS
NEARSHORE, STEEP SEAS OF 6 TO 8 FT MAY PROPAGATE NEARSHORE. WINDS
INCREASE FARTHER THIS WEEKEND WITH NEAR-GALE TO GALE FORCE WINDS
LIKELY FOR MUCH OF THE OUTER WATERS. /JB
EKA WATCHES/WARNINGS/ADVISORIES
CA...
NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY FROM 3 PM THURSDAY TO 9 PM PDT FRIDAY
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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