Small Craft Advisory 43, NWS Eureka, CA

017 
WHUS76 KEKA 062100
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
200 PM PDT SUN SEP 6 2009


PZZ450-470-071230-
/O.CAN.KEKA.SC.Y.0043.000000T0000Z-090907T1600Z/
/O.NEW.KEKA.SW.Y.0046.090907T0000Z-090907T1600Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
200 PM PDT SUN SEP 6 2009

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT FROM 5 PM
THIS AFTERNOON TO 9 AM PDT MONDAY...
...SMALL CRAFT ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A SMALL CRAFT
ADVISORY FOR HAZARDOUS SEAS...WHICH IS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 9 AM PDT MONDAY. THE SMALL CRAFT ADVISORY HAS BEEN
CANCELLED. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE
EXPECTED TO BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID
SHOALING AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING
WAVES IN SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK
MUCH FARTHER FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED.
REMEMBER...BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$

PZZ455-071230-
/O.CAN.KEKA.SC.Y.0043.090906T2200Z-090907T1600Z/
/O.NEW.KEKA.SW.Y.0046.090907T0000Z-090908T0600Z/
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
200 PM PDT SUN SEP 6 2009

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT FROM 5 PM
THIS AFTERNOON TO 11 PM PDT MONDAY...
...SMALL CRAFT ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A SMALL CRAFT
ADVISORY FOR HAZARDOUS SEAS...WHICH IS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 11 PM PDT MONDAY. THE SMALL CRAFT ADVISORY HAS BEEN
CANCELLED. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE
EXPECTED TO BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID
SHOALING AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING
WAVES IN SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK
MUCH FARTHER FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED.
REMEMBER...BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$

PZZ475-071230-
/O.CAN.KEKA.SC.Y.0043.090906T2200Z-090911T0000Z/
/O.NEW.KEKA.SW.Y.0046.090907T0000Z-090911T0000Z/
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
200 PM PDT SUN SEP 6 2009

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT FROM 5 PM
THIS AFTERNOON TO 5 PM PDT THURSDAY...
...SMALL CRAFT ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A SMALL CRAFT
ADVISORY FOR HAZARDOUS SEAS...WHICH IS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 5 PM PDT THURSDAY. THE SMALL CRAFT ADVISORY HAS BEEN
CANCELLED. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE
EXPECTED TO BE HAZARDOUS TO SMALL CRAFT. MARINERS SHOULD AVOID
SHOALING AREAS. LONG PERIOD SWELL CAN SHARPEN INTO LARGE BREAKING
WAVES IN SHOALING AREAS. IT IS NOT UNUSUAL FOR WAVES TO BREAK
MUCH FARTHER FROM SHOALING AREAS THAN IS NORMALLY EXPERIENCED.
REMEMBER...BREAKING WAVES CAN EASILY CAPSIZE EVEN LARGER VESSELS.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
205 PM PDT SAT SEP 5 2009

.SYNOPSIS...LOW PRESSURE ALOFT WILL PASS TO THE NORTH OF THE AREA
THROUGH EARLY SUNDAY...POSSIBLY RESULTING IN A FEW SPRINKLES OR
LIGHT SHOWERS NEAR THE COAST NORTH OF CAPE MENDOCINO.
OTHERWISE...HIGH PRESSURE WILL BUILD OVER THE AREA BRINGING WARMER
AFTERNOONS AND MORE SUNSHINE EARLY NEXT WEEK.

&&

.DISCUSSION...A WEAK FRONTAL BOUNDARY SWEPT ACROSS THE REGION THIS
MORNING AND HAS CLEARED THE EKA CWA AT EARLY AFTERNOON. RAINFALL
AMOUNTS RANGED FROM 0.31 INCH AT CRESCENT CITY TO 0.01 INCH AT
THE NWS ON WOODLEY ISLAND TO TRACE OR LOWER AMOUNTS FOR POINTS SOUTH
AND EAST.

COLDER AIR ALOFT WILL CONTINUE TO SPILL INTO THE REGION OVERNIGHT
WITH SATPIX INDICATING AN INSTABILITY CU FIELD OFFSHORE MOVING
TOWARDS THE COAST. AN ISOLATED OR WIDELY SCATTERED SHOWER CAN NOT BE
RULED OUT ALONG THE COAST LATER TONIGHT NORTH OF CAPE MENDOCINO IN
ASSOCIATION WITH THIS...BUT IN GENERAL TRIMMED BACK POPS QUITE A BIT
FOR THE OVERNIGHT PERIOD GIVEN TRENDS. ANOTHER WAVE PASSES TO THE
NORTH OF THE AREA EARLY SUNDAY BUT ANY RAINFALL WILL BE VERY
LIGHT...IF ANY AT ALL...WITH THE BEST PROSPECTS RIGHT ALONG THE
OREGON BORDER. WE TRANSITION TO AN OFFSHORE FLOW PATTERN SUNDAY
NIGHT WHICH WILL CARRY US THROUGH THE NEXT SEVERAL DAYS...YIELDING A
RETURN OF SUNSHINE...WARMER AFTERNOONS EVERYWHERE AND COOLER NIGHTS
ALONG THE COAST AND IN THE VALLEYS. SOME MARINE STRATUS MAY RETURN
TO THE COAST MID TO LATE WEEK...BUT THAT IS HIGHLY DEPENDENT ON
WHERE THE THERMAL TROUGH SETS UP. OTHERWISE...PROGS SUGGEST SOME
INCREASE IN MIDLEVEL MOISTURE BY NEXT WEEKEND OVER THE INTERIOR BUT
CONFIDENCE IN THIS IS TOO LOW TO INDICATE POPS FOR NOW. BURGER

&&

.AVIATION...A FRONT MOVED ONTO THE NORTH COAST AROUND MID MORNING
SAT...PRODUCING LIGHT RAIN AND DRIZZLE ALONG WITH IFR CIGS AND
VSBYS. SATELLITE IMAGERY SHOWED CLEARER SKIES AND PERHAPS DRIER AIR
MOVING TOWARDS THE REGION THIS AFTERNOON. THIS DRIER AND SLIGHTLY
UNSTABLE AIR SHOULD BRING VFR TO NORTH COAST TERMINALS THIS EVENING.
HOWEVER...MOISTURE AND CLOUDS HUNG UP OVER THE COASTAL RANGES WILL
STILL PRODUCE AREAS OF MVFR THROUGH MID EVENING. A WEAK TROUGH WILL
APPROACH THE COAST BY EARLY SUN MORNING...AND SHOULD FURTHER REDUCE
THE COVERAGE OF MVFR PRODUCING CLOUD LAYERS. THE TROUGH WILL CLIP
DEL NORTE COUNTY WITH SHOWERS AND MVFR CIGS BY MIDDAY SUNDAY. DJB

&&

.MARINE...A WEAK PRESSURE GRADIENT WILL CONTINUE TO PRODUCE
RELATIVELY LIGHT WINDS OVER THE WATERS THROUGH SUNDAY. A FEW HIGHER
WIND GUSTS TO AROUND 20 KTS MAY STILL OCCUR AS A WEAK TROUGH CLIPS
THE FAR NORTHERN PORTIONS OF PZZ470 AND 450.

COMBINED SEA HEIGHTS WILL CONTINUE TO BE QUITE LOW TONIGHT...6 FT
OR LESS. DOMINANT PERIODS ARE STILL SHORT...IN THE 8-10 SECOND BAND.
COMBINED SEAS WILL BEGIN TO BUILD ON SUNDAY AS A NORTHWEST SWELL
...GENERATED FROM A STORM IN THE NE PAC...IMPINGES ON THE AREA.
DOMINANT WAVE PERIODS WILL BEGIN TO INCREASE ON SUNDAY...REACHING 14
SECONDS IN THE AFTERNOON AND EVENING. SMALL CRAFT ADVISORIES WILL BE
NEEDED FOR COMBINED SEAS OF 10-12 FT...BUT ITS TOO EARLY TO ISSUE
AT THIS TIME. COMBINED SEAS SHOULD PEAK AROUND 12 FT AT 14 SECONDS
SUNDAY NIGHT AND THEN GRADUALLY SUBSIDE TO 8 TO 10 FT ON MONDAY.

HIGH PRESSURE WILL BEGIN TO BUILD TOWARDS THE COAST SUNDAY NIGHT
INTO MONDAY...AND RESULT IN A STEEPER PRESSURE GRADIENT ACROSS THE
WATERS. THE NORTH WINDS WILL APPROACH MARGINAL SMALL CRAFT ADVISORY
LEVEL (18-22 KTS) AS EARLY AS MONDAY MORNING. CURRENT INDICATIONS
ARE FOR WINDS TO REACH SOLID SMALL CRAFT ADVISORY (23-27KTS)
THROUGHOUT THE OUTER WATERS MONDAY NIGHT THROUGH TUESDAY. LATEST
GFS HAS WINDS NEAR GALE (28-33KTS) TUE AND PERHAPS AGAIN ON WED.
FOR NOW WILL CONTINUE WITH WINDS AROUND 25KTS TUE THROUGH THU.

DOMINANT WAVE PERIODS WILL BEGIN TO DECREASE MONDAY NIGHT AS FRESH
NW SWELL AND WIND WAVES DOMINATE THE SPECTRUM. SWAN AND HIGH RES
WAVE WATCH III HAS LONG PERIODS WAVES OF 1-2 FT CREEPING INTO
PICTURE AROUND MID WEEK...BUT SHORT PERIOD WAVES WILL LIKELY
DOMINATE THROUGH THU. DJB

&&

.EKA WATCHES/WARNINGS/ADVISORIES...NONE.
&&

VISIT US AT HTTP://WWW.WEATHER.GOV/EUREKA