Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 251218
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
418 AM PST SUN JAN 25 2015

.SYNOPSIS...HIGH PRESSURE WILL DOMINATE THE WEATHER PATTERN
THROUGH EARLY NEXT WEEK RESULTING IN DRY CONDITIONS AND
UNSEASONABLY WARM TEMPERATURES. NEAR RECORD TEMPERATURES WILL BE
POSSIBLE AGAIN TODAY. AN APPROACHING TROUGH WILL HELP BREAK DOWN
THE RIDGE NEXT WEEK.

&&

.DISCUSSION...HIGH PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER
PATTERN THROUGH THE REMAINDER OF THE WEEKEND. THIS WILL RESULT IN
PERSISTING BEAUTIFUL WEATHER WITH DRY CONDITIONS AND UNSEASONABLY
WARM TEMPERATURES. PATCHY FOG WILL BE POSSIBLE ACROSS INTERIOR
VALLEYS OVER THE NEXT FEW EVENINGS BUT SHOULD DISSIPATE BY THE
LATE MORNING HOURS. RECORD HIGH TEMPERATURES MAY BE REACHED ACROSS
INTERIOR AREAS AGAIN TODAY AS OFFSHORE FLOW DEVELOPS. HOWEVER,
EASTERLY FLOW DOES NOT LOOK TO BE ALL THAT STRONG. THE RIDGE WILL
BREAK DOWN AND CLOUD COVER WILL INCREASE BY THE MIDDLE OF NEXT
WEEK AS AN UPPER LEVEL TROUGH APPROACHES THE PACIFIC NORTHWEST.
THIS IN CONJUNCTION WITH A CUT OFF LOW NEAR SOUTHERN CALIFORNIA
COULD BRING SHOWERS TO NORTHWEST CALIFORNIA TUESDAY AND WEDNESDAY.
A CONCERN, HOWEVER, IS THE LACK OF MOISTURE IN THIS WARMER AIR
MASS THUS SLIGHT CHANCES FOR SHOWERS WERE MAINTAINED TUESDAY AND
WEDNESDAY. DRY WEATHER WILL THEN PERSIST LATE IN THE WEEK AS
RIDGING SHIFTS BACK OVER NORTHERN CALIFORNIA. KML/JT

&&

.AVIATION...SATELLITE (11-3.9U) AND SURFACE OBSERVATIONS SHOW FOG IN
THE VALLEYS NORTH OF UKIAH. NORTHEAST FLOW HAS GENERALLY KEPT THE
COASTS CLEAR THIS MORNING. THERE HAVE BEEN A FEW SHORT PERIODS OF
SHALLOW FOG ALONG THE COAST AND THIS MAY CONTINUE THIS MORNING...BUT
EXPECT THEY WILL BE BRIEF SO ONLY HINTED AT THEM IN THE TAFS. SKIES
ARE EXPECTED TO CLEAR AGAIN BY LATE MORNING...BUT THERE MAY BE SOME
AFTERNOON HAZE ALONG THE COAST ONCE AGAIN.

THIS EVENING SOME CLOUDS MAY COME IN ALONG THE COAST AGAIN...MUCH
LIKE TODAY...BUT OFFSHORE FLOW PICKS UP AGAIN LATE TONIGHT AND
SHOULD PUSH THE CLOUDS BACK OFF THE COAST. INLAND VALLEYS WILL
LIKELY SEE SIMILAR FOG AGAIN. MKK

&&

.MARINE...SOUTHERLY WINDS HAVE BEGUN TO SPREAD ACROSS THE AREA THIS
MORNING AS HIGH PRESSURE WEAKENS AND SHIFTS OFF TO THE EAST. THESE
WILL PERSIST ON MONDAY AND TUESDAY...BUT WILL REMAIN FAIRLY
LIGHT...IN THE 10 TO 15 KT RANGE.

WEDNESDAY NIGHT AND THURSDAY WINDS WILL BECOME NORTHERLY AGAIN AS
HIGH PRESSURE RE-ESTABLISHES ITSELF OVER THE AREA. CONFIDENCE IS
GROWING THAT THERE WILL BE A WEAK BOUNDARY THAT MOVES THROUGH
WEDNESDAY AFTERNOON AND THE WINDS WILL SWITCH AROUND ONCE AGAIN.
WINDS WILL INCREASE TO THE 15 TO 20 KT RANGE WITH THIS HIGH
PRESSURE. THIS HIGH PRESSURE HAS MORE OF A NORTHEAST TO SOUTHWEST
ORIENTATION BRINGING NORTHEASTERLY WINDS TO THE NEARSHORE WATERS
SO SHORT PERIOD WAVES NEAR THE COAST SHOULD REMAIN SMALL.

THERE IS ALSO A LONG PERIOD WAVE MOVING INTO THE WATERS. CURRENTLY
IT HAS DROPPED TO AROUND 8 FT AT 14 SECONDS. THIS SWELL IS EXPECTED
TO REMAIN NEARLY STEADY THROUGH TONIGHT...STARTING TO DIMINISH ON
MONDAY. THIS WILL CONTINUE TO DIMINISH ON TUESDAY AND WEDNESDAY.

WEDNESDAY MODELS REMAIN ON TRACK BRINGING IN ANOTHER LONG PERIOD
SWELL. IT LOOKS TO INITIALLY BE ONLY AROUND 2 FT AT 20 SECONDS...BUT
WILL BUILD TO AROUND 4 FT AT 18 SECONDS ON THURSDAY. THIS MAY POSE A
SMALL SNEAKER WAVE THREAT ONCE AGAIN. MKK

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...NONE.
&&

$$

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