790
FXUS66 KEKA 062208
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
308 PM PDT WED MAY 6 2026
SYNOPSIS
WEAK HIGH PRESSURE BUILDING INTO THE AREA WILL GRADUALLY
WARM INLAND TEMPERATURES THROUGH THURSDAY. CLOSER TO THE COAST
WIDESPREAD LOW CLOUDS WILL LINGER KEEPING TEMPERATURES COOLER.
FRIDAY WILL SEE SLIGHTLY COOLER TEMPERATURES AND MORE CLOUDS. FOR
THE WEEKEND AND INTO EARLY NEXT HIGHS ARE EXPECTED TO WARM EACH DAY
WITH MANY INLAND AREAS SEEING THE 90S BY MONDAY.
KEY MESSAGES: NEAR TO ABOVE NORMAL INLAND TEMPERATURES THURSDAY
WITH SOME COOLING FRIDAY.
BREEZY NORTH WINDS THIS WEEKEND WITH WELL ABOVE NORMAL TEMPERATURES
INLAND.
MINOR TO MODERATE HEAT RISK IS POSSIBLE ON MONDAY IN MENDOCINO, LAKE
AND TRINITY COUNTIES.
DISCUSSION
HIGH PRESSURE IS BUILDING OVER THE AREA IN THE WAKE
OF A DEPARTING LOW. THIS WILL BRING CLEARING SKIES AND WARMING
TEMPERATURES FOR MUCH OF THE INTERIOR. STRATUS HAS RETREATED TO
THE USUAL COASTAL AREAS OF HUMBOLDT, DEL NORTE AND MENDOCINO
COUNTIES AND WILL RETURN WITH LESS COVERAGE OVERNIGHT INTO
THURSDAY MORNING THAN PREVIOUS PAST FEW DAYS. THOUGH HREF DOES
HAVE A LESS VIGOROUS LOW LEVEL CLOUD COVER THURSDAY AFTERNOON,
STRATUS IS EXPECTED TO STRADDLE THE COASTLINE AND WILL LINGER
AROUND HUMBOLDT BAY AND THE COASTLINE UP TO THE OREGON BORDER.
THURSDAY NIGHT INTO FRIDAY A WEAK FRONT WILL BRING SOME MID LEVEL
CLOUDS AND COOLER TEMPERATURES TO TRINITY COUNTY. THIS MAY BRING
SOME DRIZZLE TO THE COAST, BUT AT THIS POINT NO REAL RAIN IS
EXPECTED. FRIDAY NIGHT INTO SATURDAY NORTHERLY WINDS ARE EXPECTED TO
INCREASE. OFFSHORE FLOW IS EXPECTED OVERNIGHT WITH BREEZY AFTERNOON
WINDS. INLAND AREAS ARE EXPECTED TO WARM AGAIN ON SATURDAY AND WITH
MOSTLY CLEAR SKIES AREAS CLOSER TO THE COAST WILL LIKELY WARM UP
TOO. THE BREEZY NORTHERLY WINDS TYPICALLY KEEP THE IMMEDIATE COAST
IN THE LOW 60S. THE WARMING TREND IS EXPECTED TO CONTINUE INTO EARLY
NEXT WEEK. AT THIS POINT THE FIRST DAY EXPECTED TO SEE MODERATE HEAT
RISK IN THE FAR INLAND AREAS IS MONDAY. HOWEVER, THERE IS SOME
POTENTIAL AN UPPER LOW COULD DEVELOP OFF THE COAST WEAKEN THE WIND
FLOW ALLOWING CLOUDS AND MARINE AIR CREEP INTO THE COASTAL COUNTIES
LIMITING THE HEATING POTENTIAL. MKK/EYS
AVIATION
THE MARINE LAYER REMAINS DEEP AND EMBEDDED ALONG THE
COAST AND FARTHER INLAND. THE MVFR CEILINGS FROM THIS LAYER WILL
ONCE AGAIN LOWER WITH OVERNIGHT COOLING, WITH HIGH CONFIDENCE FOR
IFR LEVELS. WITH BUILDING HIGH PRESSURE, AND ADDITIONAL
COMPRESSIONAL EFFECTS, LIFR LEVELS ARE POSSIBLE. GUIDANCE IS
TRENDING WITH HIGHER PROBABILITIES FOR THIS SCENARIO. PROBABILITIES
FOR LIFR ARE AT THIS TIME 20-30%, BUT MOS GUIDANCE IS LATCHING ON TO
LOWER CEILINGS.
MARINE
NORTHERLY WINDS INCREASE SOME TODAY, TO AROUND 15-17 KTS,
MAINLY IN THE SOUTHERN WATERS AROUND THE CAPE. SIMILAR CONDITIONS
WILL CONTINUE THURSDAY, WITH SHORT PERIOD SEAS OF 3 TO 5 FEET AND
SOME SMALL MID PERIOD SWELLS. THURSDAY NIGHT INTO FRIDAY A WEAK
FRONT APPROACHING THE AREA IS EXPECTED TO BRING LIGHTER WINDS
NORTH OF CAPE MENDOCINO. ONLY AROUND 5 TO 10 KT AND THESE MAY
BRIEFLY BECOME WEST OR SOUTHWEST. FARTHER SOUTH THE WINDS ARE
EXPECTED TO INCREASE TO AROUND 15 TO 20 KT. BEHIND THE FRONT ON
THE WEEKEND WINDS ARE EXPECTED TO INCREASE TO NEAR GALE OR GALE
FORCE AS HIGH PRESSURE BUILDS IN AGAIN. THERE IS EXPECTED TO BE A
FAIRLY SMALL NORTHWEST SWELL THROUGH MUCH OF THE PERIOD. FRIDAY
NIGHT AND SATURDAY BEHIND THE WEAK FRONT THE SWELL MAY INCREASE
SLIGHTLY WITH PERIODS JUMPING UP TO AROUND 15 SECONDS, BUT HEIGHTS
REMAIN AROUND 3 OR 4 FEET. MKK/JJW
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.
VISIT US AT HTTPS://WWW.WEATHER.GOV/EUREKA
FOLLOW US ON FACEBOOK AND TWITTER AT:
HTTPS://WWW.FACEBOOK.COM/NWSEUREKA
HTTPS://WWW.TWITTER.COM/NWSEUREKA
FOR FORECAST ZONE INFORMATION
SEE THE FORECAST ZONE MAP ONLINE:
HTTPS://WWW.WEATHER.GOV/IMAGES/EKA/ZONEMAP.PNG
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page