459
FXUS66 KEKA 112207
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
307 PM PDT THU JUN 11 2026
KEY MESSAGES
- TEMPERATURES WILL WARM QUICKLY WITH MODERATE TO MAJOR HEATRISK
EXPECTED THURSDAY THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK.
- A MORE WIDESPREAD RETURN OF COASTAL STRATUS IS EXPECTED TONIGHT
SOUTH OF CAPE MENDOCINO AND CONTINUES TO EXPAND OVER THE
WEEKEND.
- POTENTIAL COOLING TREND IN THE INLAND AREAS STARTING ON
WEDNESDAY.
SYNOPSIS
HIGH PRESSURE CONTINUES TO BUILD INTO THE AREA WITH
HOT TEMPERATURES EXPECTED INTO EARLY NEXT WEEK. THE NEAR COASTAL
AND COASTAL AREAS MAY START TO SEE MORE MARINE INFLUENCE OVER THE
WEEKEND AND INTO EARLY NEXT WEEK WHILE TRINITY COUNTY IS EXPECTED
TO SEE THE HOTTEST TEMPERATURES MONDAY AND TUESDAY. COOLER
TEMPERATURES ARE POSSIBLE STARTING ON WEDNESDAY.
DISCUSSION
HIGH PRESSURE CONTINUES TO BUILD IN ACROSS THE AREA
AND THE INTERIOR IS EXPECTED TO SEE ONE OF THE FIRST HOT DAYS OF
THIS HEATWAVE. A FEW MARINE CLOUDS RETURNED ALONG HUMBOLDT COAST
THIS MORNING BUT CLEAR OUT BY MID TO LATE MORNING. IT LOOKS LIKE
THIS WILL OCCUR AGAIN FRIDAY MORNING, ALTHOUGH CONFIDENCE IS LOW
ON THIS. A SOUTHERLY SURGE OF CLOUDS IS MAKING IT'S WAY NORTH INTO
MONTEREY BAY THIS AFTERNOON. THIS IS EXPECTED TO MAKE IT'S WAY
NORTH OVERNIGHT AND MAY REACH THE MENDOCINO BY SOME POINT ON
FRIDAY. THIS WILL LIKELY START TO COOL TEMPERATURES AT THE
IMMEDIATE COAST AND INLAND TO AREAS AS FAR AS BOONVILLE OR SO.
OVERNIGHT LOWS WILL LIKELY DROP INTO THE 50S IN MOST OF THE
VALLEYS, HOWEVER THE RIDGES ARE EXPECTED TO STAY MUCH WARMER,
LIKELY IN THE 70S. THIS WILL INCREASE THE HEAT RISK IN THESE
AREAS.
FOR THE WEEKEND A WEAK UPPER LEVEL TROUGH IS EXPECTED TO DROP DOWN
FROM THE NORTH. THIS IS EXPECTED TO BRING SOME INSTABILITY, BUT
CURRENT MOISTURE PROFILES LOOK LIKE THEY REMAIN TOO DRY FOR ANY
THUNDERSTORMS. TEMPERATURES ARE EXPECTED TO REMAIN MORE STEADY
FLUCTUATING SOMEWHERE AROUND 100 IN THE AFTERNOONS. THE WINDS
SOUTHERLY WINDS ALONG THE MENDOCINO COAST ARE EXPECTED TO SLIGHTLY
INCREASE AND KEEP THE STRATUS IN PLACE. THE HIGH PRESSURE IS
EXPECTED TO KEEP THE MARINE LAYER FAIRLY SHALLOW AND IT MAY MIX
OUT EACH AFTERNOON. SUNDAY IT LOOKS FAIRLY CERTAIN THAT THE
MARINE LAYER WILL BE WELL NORTH OF CAPE MENDOCINO AS THE WINDS GET
LIGHTER. MONDAY AND TUESDAY HIGH PRESSURE CONTINUES TO THE
STRENGTHEN OVER THE AREA AND IS EXPECTED TO SOME OF THE HOTTEST
TEMPERATURES OF THIS HEAT WAVE TO TRINITY COUNTY. AREAS CLOSER TO
THE COAST THERE IS MORE UNCERTAINTY AND THIS WILL NEED TO BE
MONITORED AS IT GETS CLOSER.
WEDNESDAY THE HIGH PRESSURE IS EXPECTED TO START TO BREAK DOWN
AND COOLER TEMPERATURES ARE EXPECTED ALOFT. THIS WILL COOL
TEMPERATURES ACROSS THE AREA AND LIKELY DEEPEN THE MARINE LAYER.
MKK
AVIATION.
VFR CONDITIONS TOOK FIRM HOLD AFTER THE REMNANT,
SHALLOW STRATUS AROUND HUMBOLDT BAY DISSOLVED THROUGH LATE
MORNING. NORTHWESTERLY WINDS WILL BE BREEZY THROUGH THE AFTERNOON
AT THE COASTAL TERMINALS. WIND GUST OVER 20 KTS AT ACV AND UP TO
30 KTS AT CEC THROUGH THE AFTERNOON WILL EASE INTO THE EVENING.
SIMILARLY TO THIS MORNING, STRATUS SHOULD DEVELOP AROUND HUMBOLDT
BAY AND WORK INTO THE COASTAL TERMINALS AROUND OR AFTER 14Z. WHAT
DOES MANAGE TO FORM WILL QUICKLY SCATTER OUT NEAR OR AFTER 16Z
FRIDAY. NORTHWESTERLY WINDS WILL TURN BREEZY AGAIN FRIDAY
AFTERNOON.
MARINE
GALE STRENGTH NORTHERLIES PERSIST THROUGH THE OUTER ZONES
THROUGH SATURDAY. THE SOUTHERN OUTER ZONE WILL HAVE LESS COVERAGE
FRIDAY, MAINLY AROUND CAPE MENDOCINO AND WESTWARD. NORTHERLY WINDS
AND STEEP SEAS WILL CONTINUE ADVISORY CONDITIONS FOR THE INNER
ZONES. STRENGTHENING NORTHERLIES OVER THE NORTHERN OUTER WATERS
FRIDAY WILL BUILD STEEP AND HAZARDOUS SEAS UP TO 14 FT. THE NORTHERN
INNER WATERS WILL HAVE TO BE WATCHED FOR A BRIEF SURGE OF HAZARDOUS
SEAS LATE FRIDAY. CURRENTLY IT LOOKS LIKE THE GALES WILL CONTINUE
BEYOND 10 TO 20 NM NORTH OF CAPE MENDOCINO ON SATURDAY, THEN START
TO DIMINISH ON SUNDAY AND THIS ALLOWS A SOUTHERLY SURGE TO MOVE
NORTHWARD. WINDS ARE GENERALLY EXPECTED TO REMAIN LIGHTER INTO EARLY
NEXT WEEK.
FIRE WEATHER
TEMPERATURES ARE EXPECTED TO REMAIN HOT AND DRY
INTO EARLY NEXT. OVER THE WEEKEND A SHORTWAVE MOVING DOWN FORM THE
PACIFIC NORTHWEST IS EXPECTED TO INCREASE INSTABILITY AND THIS MAY
LEAD TO INCREASED MIXING HEIGHTS. IT DOESN'T LOOK LIKE THERE WILL
BE ENOUGH MOISTURE IN NW CALIFORNIA FOR ANY THUNDERSTORMS, THAT IS
EXPECTED TO REMAIN WELL EAST AND SOUTH OF THE AREA. EARLY NEXT
WEEK TEMPERATURES MAY CLIMB SLIGHTLY MORE AND THE HOTTEST
TEMPERATURES OF THE HEAT WAVE ARE EXPECTED. WEDNESDAY INTO LATE IN
THE WEEK COOLER TEMPERATURES ARE EXPECTED. THIS MAY ALSO BRING
STRONGER WINDS OR POSSIBLY THUNDERSTORMS DEPENDING ON HOW THE
PATTERN EVOLVES. MKK
EKA WATCHES/WARNINGS/ADVISORIES
CA...
HEAT ADVISORY UNTIL 10 PM PDT FRIDAY FOR CAZ113-114-118>120.
RED FLAG WARNING UNTIL 5 PM PDT THIS AFTERNOON FOR CAZ419.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY UNTIL 8 PM PDT THIS EVENING FOR PZZ450.
SMALL CRAFT ADVISORY UNTIL 9 AM PDT FRIDAY FOR PZZ455.
GALE WARNING UNTIL 9 PM PDT SATURDAY FOR PZZ470.
GALE WARNING UNTIL 9 AM 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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