476
FXUS66 KEKA 172144
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
244 PM PDT SAT MAY 17 2025
SYNOPSIS
BREEZY WINDS AND A FEW MOUNTAIN SHOWERS CONTINUE THIS
AFTERNOON. TONIGHT SOME COASTAL CLOUDS RETURN WITH GENERALLY
CLEAR SKIES AND BREEZY WINDS RETURNING ON SUNDAY. MONDAY THE
WARMUP STARTS, BUT THERE MAY BE SOME CLOUDS IN THE AFTERNOON.
TUESDAY AND WEDNESDAY ADDITIONAL WARMING IS EXPECTED WITH HIGHS
AROUND 90 INLAND. COOLER TEMPERATURES ARE EXPECTED LATE IN THE
WEEK.
DISCUSSION
A WEATHER SYSTEM MOVED THROUGH THE AREA THIS
MORNING AND BROUGHT A FEW LIGHT SHOWERS OR DRIZZLE TO HUMBOLDT AND
DEL NORTE COUNTIES. SKIES ARE EXPECTED TO GRADUALLY CLEAR ACROSS
THE AREA AS THIS SYSTEM MOVES OUT OF THE AREA. A FEW SHOWERS ARE
POSSIBLE OVER THE MOUNTAINS OF HUMBOLDT, DEL NORTE AND NORTHERN
TRINITY COUNTIES. TONIGHT SOME OF THESE CLOUDS WILL LIKELY SETTLE
INTO THE VALLEYS IN HUMBOLDT AND DEL NORTE COUNTIES. THIS SHOULD
KEEP TEMPERATURES IN THE UPPER 30S AND LIMIT FROST IN MOST AREAS.
THE HIGHER ELEVATION VALLEYS OF TRINITY COUNTY MAY SEE SOME FROST
SO HAVE ISSUED A FROST ADVISORY FOR HAYFORK, WEAVERVILLE AND
DOUGLAS CITY AS WELL AS OTHER NEARBY AREAS. SUNDAY AFTERNOON
GUSTY WINDS ARE EXPECTED ONCE AGAIN WITH GUSTS TO 35 MPH IN MANY
OF THE MORE WIND PRONE AREAS. HIGH TEMPERATURES IN THE INLAND
AREAS WILL BE IN THE 60S TO LOW 70S BOTH DAYS WHILE THE COAST IS
EXPECTED TO REMAIN NEAR 60.
MONDAY ANOTHER WEATHER SYSTEM MOVES BY TO THE NORTH OF THE AREA.
THIS IS EXPECTED TO ONCE AGAIN BRING STRATUS TO THE COAST AREAS.
THE SYSTEM MOVES BY THE AREA IN THE AFTERNOON SO THIS WILL STILL
ALLOW INLAND TEMPERATURES TO WARM TO AROUND 70 IN THE NORTH TO THE
LOW 80S IN THE SOUTH. THE MAIN IMPACT EXPECTED IS SLIGHTLY COOLER
TEMPERATURES AND SOME MID CLOUDS. THERE IS A CHANCE FOR SOME
LIGHT RAIN SHOWERS IN DEL NORTE COUNTY, BUT PROBABILITIES ARE LOW
FOR THIS. THE NBM IS ONLY SHOWING A TEN PERCENT CHANCE OF 0.01
INCHES IN DEL NORTE COUNTY.
TUESDAY AND WEDNESDAY THIS SYSTEM MOVES PAST THE AREA AND HIGH
PRESSURE BUILDS IN. WEDNESDAY IS EXPECTED TO BE THE HOTTEST DAY OF
THE WEEK IN THE INLAND AREAS WITH HIGHS IN THE UPPER 80S TO NEAR
90 IN THE WARMER VALLEYS. HEAT RISK INCREASES SLIGHTLY, BUT
REMAINS MAINLY IN THE MINOR CATEGORY.
THURSDAY THROUGH SATURDAY THE FLOW ALOFT IS EXPECTED TO BECOME
MORE ZONAL. THIS WILL ALLOW TEMPERATURES INLAND TO COOL AND THE
MARINE LAYER TO BECOME MORE ROBUST. THERE WILL BE SOME INDIVIDUAL
SHORTWAVES MOVING THROUGH THIS THAT COULD BRING SOME LIGHT RAIN,
BUT OVERALL IT LOOKS FAIRLY DRY. MKK
AVIATION
SATELLITE IS SHOWING LOW TO MID LEVEL CLOUD COVER OVER
MUCH OF THE AREA EARLY THIS AFTERNOON, BUT ALL THE TERMINALS REMAIN
VFR. CLOUDS ARE EXPECTED TO SLOWLY CONTINUE LIFTING AND SCATTERING
INTO THE EVENING, BUT SOME LINGERING CLOUDS ARE POSSIBLE OVERNIGHT.
GUSTY NORTHERLY WINDS ARE FORECAST TO EASE OVERNIGHT, BUT UKI COULD
STILL SEE A FEW ISOLATED GUSTS THROUGH THE NIGHT AS THERE NW WINDS
OF 30-35 KTS ARE STILL POSSIBLE 1500-2000 FT AGL. STRATUS LIKELY
RETURNS TO THE HUMBOLDT AND MENDOCINO COASTS TONIGHT, WITH LESS
CERTAINTY FOR THE DEL NORTE COAST. A WEAKER MARINE INVERSION WILL
LIKELY KEEP ANY CEILINGS MVFR OR VFR. NBM IS SHOWING A ROUGHLY 50%
CHANCE FOR MVFR CEILINGS OR WORSE AT ACV, AND A 30% CHANCE FOR IFR
CEILINGS OR WORSE. CEC HAS AROUND A 20% CHANCE FOR MVFR CEILINGS OR
WORSE. ANY LOW CLOUDS ARE FORECAST TO LIFT AND SCATTER OUT SHORTLY
AFTER SUNRISE AND GUSTY NORTHERLIES ARE LIKELY AGAIN SUNDAY
AFTERNOON. JB
MARINE
ELEVATED NORTHERLY WINDS THIS AFTERNOON WILL EASE THIS
EVENING AND OVERNIGHT, ESPECIALLY NORTH OF CAPE MENDOCINO. SHORT
PERIOD SEAS ARE FORECAST TO GRADUALLY DIMINISH INTO THE DAY SUNDAY
HERE. SOUTH OF THE CAPE, WINDS WILL INCREASE AND MOVE CLOSER TO THE
COAST SUNDAY AFTERNOON, BRINGING STRONG BREEZES TO NEAR-GALE FORCE
GUSTS UP TO 30 KTS AND SHORT PERIOD SEAS. WINDS EASE SOME MONDAY AS
THE PRESSURE GRADIENT WEAKENS, BUT NORTHERLIES OF RETURN AGAIN LATE
MONDAY INTO THE REST OF THE WEEK. ON TOP OF SHORT PERIOD SEAS, A MID-
PERIOD NW SWELL OF AROUND 8-9 FT WILL FILL TUESDAY, ELEVATING
SIGNIFICANT WAVE HEIGHTS FURTHER. JB
EKA WATCHES/WARNINGS/ADVISORIES
CA...
NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
SMALL CRAFT ADVISORY FROM 3 PM THIS AFTERNOON TO 9 AM PDT
SUNDAY FOR PZZ450-470.
SMALL CRAFT ADVISORY UNTIL 9 PM PDT SUNDAY FOR PZZ455-475.
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