Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 211148
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
348 AM PST SUN DEC 21 2014

.SYNOPSIS...SHOWERS WILL CONTINUE TODAY WITH THE GREATER AMOUNTS
OCCURRING ACROSS THE NORTHERN AREAS OF DEL NORTE AND HUMBOLDT
COUNTIES. LOCALLY HEAVY RAINFALL MAY OCCUR DURING THE MORNING
PRIMARILY ACROSS THE TERRAIN OF DEL NORTE AND NORTHERN HUMBOLDT
COUNTIES. A HIGH PRESSURE RIDGE WILL BUILD ACROSS THE REGION
MONDAY RESULTING IN DRIER CONDITIONS EARLY THIS WEEK.


&&

.DISCUSSION...WINTER BEGINS TODAY AT 3:03 PM THE TIME OF THE
WINTER SOLSTICE. SHOWERS WILL DECREASE ACROSS PORTIONS OF
MENDOCINO COUNTY TODAY BUT WILL CONTINUE ACROSS OTHER AREAS.
LOCALLY HEAVY RAIN MAY OCCUR DURING THE MORNING PRIMARILY ACROSS
THE TERRAIN OF DEL NORTE AND NORTHERN HUMBOLDT COUNTIES WITH UP TO
1 INCH POSSIBLY OCCURRING. SHOWERS WILL DECREASE SUNDAY NIGHT AND
MONDAY AS A HIGH PRESSURE RIDGE BUILDS ACROSS THE REGION ON
MONDAY. THE HIGH PRESSURE RIDGE WILL PRODUCE DRIER CONDITIONS AND
A DECREASE IN CLOUDINESS EARLY THIS WEEK. THEREFORE A REDUCTION IN
CLOUDINESS AND LIGHTER WINDS WILL PREVAIL ACROSS THE REGION MONDAY
AND TUESDAY. ABUNDANT GROUND MOISTURE WILL RESULT IN THE FORMATION
OF VALLEY FOG MONDAY NIGHT INTO TUESDAY MORNING. A WEAK COLD FRONT
WILL MOVE THROUGH THE AREA WEDNESDAY PRODUCING RAIN SHOWERS ACROSS
THE AREA. THE SHOWERS WILL PRIMARILY AFFECT AREAS NORTH OF CAPE
MENDOCINO ON WEDNESDAY. RAIN CHANCES WILL DECREASE WEDNESDAY
NIGHT. PRECIPITATION WILL LIKELY TURN TO SNOW ABOVE 5K FT HOWEVER
ONLY LIGHT AMOUNTS WILL OCCUR WEDNESDAY NIGHT. A HIGH PRESSURE
RIDGE WILL BUILD ACROSS THE REGION THURSDAY, CHRISTMAS DAY,
PRODUCING PARTLY CLOUDY SKIES AND DRIER CONDITIONS THURSDAY AND
FRIDAY.



&&

.AVIATION...MORNING RADAR SHOWS RAIN SHOWERS ACROSS MOST OF
NORTHWEST CALIFORNIA. EXPECT IFR TO PREVAIL TODAY, MAINLY DUE TO
CEILINGS. THOUGH, PERIODS OF LIFR IS POSSIBLE IN SOME OF THE HEAVIER
SHOWERS.


&&

.MARINE...THE MORNING BUOY OBSERVATIONS SHOW LIGHT WINDS WITH WAVE
HEIGHTS RANGING FROM 13-15 FT. THE MORNING ASCAT PASS MISSED OUR
WATERS, BUT THIS SHOULDN`T BE AN ISSUE AS MODELS SHOW WINDS DROPPING
BELOW 20 KT THIS MORNING. WESTERLY SWELL CONTINUES TO SUBSIDE THIS
MORNING, SO DROPPED THE SE.W AND SU.Y EARLIER THAN HEADLINED. THOSE
ARE REPLACED BY SC.Y`S, WHICH WILL BE IN PLACE THROUGH AT LEAST
TUESDAY AND WILL LIKELY BE EXTENDED WITH UPCOMING FORECAST PACKAGE.
MODELS ARE IN GOOD AGREEMENT SHOWING A LIGHT TO MODERATE BREEZE
THROUGH TUESDAY AS A RIDGE HOVERS OVER THE REGION. WINDS WILL BE
SLIGHTLY HIGHER SOUTH OF CAPE MENDOCINO TUESDAY AS THE PRESSURE
GRADIENT INCREASES SLIGHTLY. THIS MAY LEAD TO SOME GUSTS TO 25 KT.
AS A FRONT APPROACHES THE REGION MIDWEEK MODELS ARE IN GOOD
AGREEMENT SHOWING WINDS INCREASING TO NEAR GALES ACROSS THE OUTER
WATERS WHILE THE INNER WATERS CAN EXPECT ELEVATED CONDITIONS.
WESTERLY SWELL GENERATED BY DISTANT STORMS SHOULD CONTINUE THIS
WEEK.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL 3 PM PST TUESDAY FOR PZZ450.

     SMALL CRAFT ADVISORY UNTIL 3 PM PST TUESDAY FOR PZZ470.

     SMALL CRAFT ADVISORY UNTIL 3 PM PST TUESDAY FOR PZZ455.

     SMALL CRAFT ADVISORY UNTIL 3 PM PST TUESDAY FOR PZZ475.

&&

$$

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