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000
FXUS66 KEKA 191040
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
340 AM PDT SUN MAY 19 2013

.SYNOPSIS...HIGH PRESSURE OVER THE REGION WILL ALLOW WARMER
TEMPERATURES AND DRIER CONDITIONS TO CONTINUE INTO MONDAY. A LOW
PRESSURE SYSTEM APPROACHING FROM THE NORTH WILL BRING COOLER
TEMPERATURES TO THE REGION ALONG WITH A THREAT OF SHOWERS NORTH OF
CAPE MENDOCINO TUESDAY THROUGH THE END OF THE WEEK.
&&

.DISCUSSION...LOW CLOUDS ACROSS HUMBOLDT COUNTY THIS MORNING WITH
INCREASED NLY WINDS KEEPING LOW LEVELS MIXED INHIBITING FG
DEVELOPMENT. PRES GRADIENT WILL CONTINUE TO TIGHTEN AS HIGH PRES
OFFSHORE INTERACTS WITH THERMAL TROUGH ACROSS THE INTERIOR WITH
BREEZY CONDITIONS DEVELOPING ALONG THE COAST LATE THIS MORNING.
CLOUDS WILL DIMINISH THIS MORNING...BUT EXPECT CLOUDS TO LINGER
THROUGH LATE MORNING/EARLY AFTERNOON AROUND THE BAY WHERE THE
ONSHORE GRADIENT IS GREATEST. DRY WX AND WARM TEMPS WILL PERSIST
THROUGH MON AS UPPER RIDGE OFFSHORE PREVAILS. MODELS REMAIN IN
GOOD AGREEMENT WITH AN UPPER TROUGH DIGGING DOWN THE W COAST TUE
DAMPENING THE UPPER RIDGE. MODELS SHOW PLENTY OF COLD AIR WITH
THIS SYSTEM TEMPS 2-3 STD DEV BELOW NORMAL. THICKNESS VALUES DROP
TO 540-550DM TUE NIGHT THROUGH THU WITH SNOW LEVELS DROPPING TO
AROUND 3-4 KFT AS A RESULT. THIS MAY RESULT IN SOME SN
ACCUMULATION ABOVE 5KFT WED AND THU...HOWEVER...CONFIDENCE IS
FAIRLY LOW ATTM. ADDITIONALLY...FROST...AND POSSIBLY EVEN A
FREEZE...WILL BE POSSIBLE THU AND FRI MORNINGS... BUT WILL BE
DEPENDENT ON OVERNIGHT SKY COVER. TROUGH AXIS BEGINS TO SHIFT E
FRI BRINGING DRIER WX AND WARMER TEMPS TO THE REGION HEADING INTO
NEXT WEEKEND.
&&

.AVIATION...MVFR CLOUD LAYER THIS MORNING WILL SCOUR OUT BY THIS
AFTERNOON AS GUSTY NORTHERLY WINDS DEVELOP. SKIES SHOULD REMAIN
MOSTLY CLEAR TONIGHT...EXCEPT FOR BRIEF AND PATCHY MVFR CIGS IN
THE DELTA.
&&

.MARINE...HIGH PRES WILL BUILD TOWARD THE PAC NW TODAY AS
THERMAL LOW PRES DEVELOPS OVER CALIFORNIA. NORTHERLY WINDS
SHOULD PEAK TO 40 KT...MAINLY IN THE OUTER WATERS...THIS
AFTERNOON AND EVENING. THE STRONG NORTH WINDS WILL GENERATE
STEEP SEAS AROUND 11 FT AT 10 SECONDS LATE THIS AFTERNOON
INTO THIS EVENING. THIS IS BORDERLINE FOR A HAZARDOUS SEAS
WARNING. THUS ISSUED A WARNING FOR SEAS INSIDE 10NM TONIGHT.
NORTH WINDS SHOULD DIMINISH SLIGHTLY MON AND TUE...BUT SEAS
WILL PROBABLY REMAIN ELEVATED AND STEEP THROUGH MID WEEK.
&&

.EKA WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY FROM 7 AM THIS MORNING TO 5 AM PDT MON FOR PZZ450.
SMALL CRAFT ADVISORY FROM 7 AM TO 3 PM PDT TODAY FOR PZZ470.
SMALL CRAFT ADVISORY FROM 7 AM THIS MORNING TO 5 PM PDT MON FOR PZZ455.
HAZARDOUS SEAS WARNING FROM 6 PM THIS EVENING TO 5 AM PDT MON FOR PZZ450-455.
GALE WARNING FROM 3 PM THIS AFTERNOON TO 5 PM PDT MON FOR PZZ470.
GALE WARNING FROM 7 AM THIS MORNING TO 5 PM PDT MON FOR PZZ475.

&&

$$

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