Area Forecast Discussion
Issued by NWS Eureka, CA

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FXUS66 KEKA 171157
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
457 AM PDT THU APR 17 2014

.SYNOPSIS...A WEAK FRONTAL BOUNDARY WILL BRING LIGHT RAIN TO AREAS
NORTH OF CAPE MENDOCINO TODAY. BUILDING HIGH PRESSURE WILL RESULT
IN A MOSTLY DRY WEEKEND BEFORE A STRONGER SYSTEM IMPACTS NORTHWEST
CALIFORNIA WITH MORE WIDESPREAD RAIN AND MOUNTAIN SNOW BY THE FIRST
HALF OF NEXT WEEK.

&&

.DISCUSSION...A WEAK FRONT WILL APPROACH THE AREA TODAY AS THE W
COAST UPPER RIDGE SHIFTS E AND WEAKENS. A LARGE MASS OF LOW
CLOUDINESS IS EVIDENT ON IR FOG ENHANCEMENT SATELLITE PIX. THIS
CLOUDINESS WILL SPREAD INLAND TODAY...MAINLY N OF CAPE MENDO. LOW
CLOUDS EXTEND UP THE EEL RIVER VALLEY ALL THE WAY TO THE SE CORNER
OF HUMBOLDT COUNTY. THESE CLOUDS MAY ERODE BEFORE THE LARGER BANK
OF LOW CLOUDS PUSH INLAND. MID AND UPPER LEVEL CLOUDINESS WILL
THICKEN TODAY AS WELL. PRECIP WILL BE LIGHT WITH THIS FRONT...WITH
AROUND A TENTH OF AN INCH ACROSS DEL NORTE AND N HUMBOLDT
COUNTIES...WITH PERHAPS A QUARTER OF AN INCH IN THE HIGHER TERRAIN
OF N DEL NORTE COUNTY.

ANOTHER WEAK FRONTAL SYSTEM WILL GRAZE THE AREA OVER THE WEEKEND
WITH EVEN LIGHTER PRECIP EXPECTED...MAINLY ACROSS THE REDWOOD
COAST AND NORTH COAST INTERIOR.

MODELS COMING INTO BETTER AGREEMENT WITH A DIGGING TROF OVER THE W
UNITED STATES DURING THE FIRST HALF OF NEXT WEEK. THIS WILL BRING
A BETTER CHANCE OF WIDESPREAD PRECIP WITH RAINFALL TOTALS OF AN
INCH OR MORE POSSIBLE IN THE N. SNOW LEVELS WILL FALL SIGNIFICANTLY
WITH THIS SYSTEM AS IT DIGS AND SHIFTS E. THE GFS CONTINUES TO
INDICATE THE POSSIBILITY OF ISOLATED THUNDER AS WELL BY TUE
AFTERNOON. WILL BEGIN TO HIGHLIGHT THIS STORM SYSTEM IN THE
HAZARDOUS WX OUTLOOK WITH SOCIAL MEDIA PRODUCTS LIKELY TO FOLLOW.
/SEC

&&

.AVIATION...VFR TO MVFR CONDITIONS AND LIGHT WINDS TO CALM
CONDITIONS WILL CONTINUE AT KCEC AND KACV THROUGH THE EARLY
MORNING.  VFR CONDITIONS AND LIGHT TO MODERATE WINDS WILL PREVAIL AT
KCEC AND KACV THIS AFTERNOON AND EVENING. VFR CONDITIONS AND LIGHT
WINDS TO CALM CONDITIONS WILL CONTINUE AT KUKI THE NEXT FEW DAYS.

&&

.MARINE...THE WINDS AND SEAS WILL CONTINUE TO GRADUALLY DIMINISH
TODAY AS AN OFFSHORE HIGH PRESSURE RIDGE WEAKENS AND SHIFTS
WESTWARD. A STRONG LOW PRESSURE SYSTEM WILL MOVE INTO WESTERN CANADA
THIS WEEKEND GENERATING ELEVATED WESTERLY SWELLS WHICH WILL
PROPAGATE ACROSS THE WATERS. SMALL CRAFT ADVISORIES WILL BE
NECESSARY ACROSS ALL THE WATERS THIS WEEKEND AND EARLY NEXT WEEK DUE
TO THE LARGE WESTERLY SWELLS PROPAGATING ACROSS THE WATERS.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL 9 AM THIS MORNING PZZ455-475.

&&

$$

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