Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 281104
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
404 AM PDT TUE APR 28 2015

.SYNOPSIS...A TROUGH MOVING OVER THE WEST COAST WILL BRING SOME
HIGH CLOUDS AND COOLER TEMPERATURES ACROSS THE INTERIOR TODAY.
HOWEVER, DRY CONDITIONS WILL PERSIST THE REST OF THIS WEEK.
INTERIOR TEMPERATURES WILL TREND UPWARD BEGINNING THURSDAY AS HIGH
PRESSURE DOMINATES THE WEATHER PATTERN.

&&

.DISCUSSION...FOG SATELLITE IMAGERY THIS MORNING SHOWS STRATUS
ALONG THE COAST AND IN THE EEL RIVER VALLEY. IT ALSO SHOWS SOME
HIGH LEVEL CLOUDS APPROACHING. THESE HIGH CLOUDS ARE ASSOCIATED
WITH AN APPROACHING TROUGH AND A VERY WEAK DISTURBANCE, WHICH WILL
PASS TO OUR NORTH THIS MORNING. THIS WILL BRING NORTHWEST
CALIFORNIA THE AFOREMENTIONED HIGH LEVEL CLOUDS TODAY AND DEL
NORTE COUNTY A SLIGHT CHANCE OF VERY LIGHT RAIN SHOWERS THIS
MORNING. WILL EMPHASIZE THE ODDS OF SHOWERS REMAIN LOW, BUT NOT
ZERO. ANY QPF WILL BE BARELY MEASURABLE. THIS THREAT WILL DECREASE
THIS AFTERNOON AND SO WILL SOME OF THE CLOUDS ALONG THE COAST.
ADDITIONALLY, INTERIOR TEMPERATURES WILL BEGIN TRENDING DOWNWARD
TODAY. HOWEVER, THEY WILL REMAIN A FEW DEGREES ABOVE NORMAL.
MODELS SHOW THE TROUGH MOVING OVER US LATE TODAY INTO WEDNESDAY,
BRINGING COOLER INTERIOR TEMPERATURES. NO PRECIPITATION IS
EXPECTED, SO POPS REMAIN BELOW CLIMO DURING THIS TIME PERIOD.
ZONAL FLOW DEVELOPS THURSDAY AND CONTINUES THROUGH THE END OF THE
WEEK. THOUGH, THE MODELS HINT AT A CUTOFF LOW DEVELOPING OFF OF
THE COAST OF SOUTHERN CALIFORNIA TOWARDS THE END OF THE WEEK. WILL
KEEP AN EYE ON THIS AS IT COULD LEAD TO SHOWERS OR MAYBE
THUNDERSTORMS LATE THIS WEEK INTO THIS WEEKEND. BUT IT`S TOO FAR
OUT TO KNOW FOR SURE AT THIS POINT AND IF ANYTHING THE MODELS HAVE
TRENDED TOWARDS HAVING THE LOW EVEN FURTHER OFFSHORE, WHICH WOULD
HAVE LESS OF AN IMPACT ON US. OTHERWISE, THE CONSMODEL WAS USED
FOR TEMPERATURES DURING THAT TIME PERIOD AND IT HAS THEM REMAINING
SEASONAL ALONG THE COAST AND TRENDING BACK UP (ABOVE NORMAL)
ACROSS THE INTERIOR.

&&

.AVIATION...A COLD FRONT MOVING TOWARD THE AREA TODAY SHOULD ACT
TO KEEP CIGS LOWER AHEAD OF PASSAGE, YIELDING MVFR ALONG THE
IMMEDIATE COAST. ONCE THE FRONT ARRIVES, AND ESPECIALLY AFTER
PASSAGE, THE ATMOSPHERE SHOULD MIX OUT NICELY ALLOWING FOR CIGS TO
LIFT AND BRINGING VFR. HOWEVER, HIGH PRESSURE WILL BUILD IN
QUICKLY BEHIND THE FRONT WHICH WILL DECOUPLE THE LOWER ATMOSPHERE
AND TRAP ANY LOW LEVEL MOISTURE, WHICH IN TURN COULD PRODUCE SOME
PATCHY FOG TONIGHT. THIS WOULD MAINLY BE AT ACV. INTERIOR NW CAL
LOCATIONS ARE FORECAST TO REMAIN VFR. BFG

&&

.MARINE...A WEAKENING FRONT WILL LIMP ACROSS THE WATERS TODAY
WITH LITTLE TO NO FANFARE. HOWEVER, HIGH PRESSURE RIDGING IN
BEHIND THE FRONT WILL BRING A SHARP INCREASING IN NORTHERLY WINDS
AND ASSOCIATED STEEP WAVES. HAVE HOISTED A GALE WATCH FOR OUTER
WATERS, MAINLY FOR WEDNESDAY BUT SOME GALES ARE POSSIBLE SOUTH OF
CAPE MENDOCINO THIS AFTERNOON AND EVENING. CONFIDENCE WAS NOT
QUIET THERE TO GO WARNING. WANT TO SEE HOW THE PATTERN SHAPES UP
FIRST. REGARDLESS, WINDS AND STEEP WAVES WILL INCREASE. MODELS ARE
SHOWING STEEP NORTH WAVES BUILDING TO THE 10 TO 15 FT RANGE OVER
THE OUTER WATERS. THESE CONDITIONS ARE EXPECTED TO REMAIN INTO THE
WEEKEND. THE INNER WATERS WILL HAVE A QUICK SHOT AT NEAR GALE
CONDITIONS ON WEDNESDAY, THEN THE HIGHEST WINDS SHOULD SHIFT AWAY
FROM THE COAST ALLOWING WINDS TO DROP FOR THE EARLY PART OF THE
WEEKEND. SEAS WILL REMAIN STEEP DUE TO THE HIGHER WINDS OFFSHORE,
BUT SHOULD COME DOWN IN HEIGHT. SMALL CRAFT ADVISORIES REMAIN IN
PLACE FOR THE INNER WATERS THROUGH THE REMAINDER OF THE WORK WEEK
DUE TO WINDS AND RESIDUAL SEAS. BFG

&&

.EKA WATCHES/WARNINGS/ADVISORIES...

CA...NONE.

NORTHWEST CALIFORNIA COASTAL WATERS...

GALE WATCH FOR PZZ470-475.
SMALL CRAFT ADVISORY PZZ450-455-470-475.

&&

$$

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