Small Craft Advisory 70, NWS Eureka, CA

449 
WHUS76 KEKA 240316
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
816 PM PDT THU SEP 23 2010

PZZ450-455-470-475-241230-
/O.CON.KEKA.SC.Y.0070.100924T1300Z-100925T0400Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
816 PM PDT THU SEP 23 2010

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 9 PM PDT
FRIDAY...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 9 PM PDT
FRIDAY. 

LONG PERIOD WAVES WILL MOVE INTO THE FORECAST WATERS FROM THE
NW FRIDAY MORNING. HEIGHTS WILL BUILD TO NEAR 10 FEET WITH A
DOMINANT PERIOD OF ABOUT 13 SECONDS...SUBSIDING QUICKLY OVER THE
WEEKEND. ANOTHER LARGE WAVE SYSTEM WILL MOVE INTO THE WATERS FROM THE
NORTHWEST ON SUNDAY.


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.

&&

$$

485 
WHUS76 KEKA 240939
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
239 AM PDT FRI SEP 24 2010

PZZ450-455-470-475-250000-
/O.CON.KEKA.SC.Y.0070.100924T1300Z-100925T0400Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
239 AM PDT FRI SEP 24 2010

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING
TO 9 PM PDT THIS EVENING...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING
TO 9 PM PDT THIS EVENING. 

A LONG PERIOD NW SWELL WILL RAPIDLY BUILD THIS MORNING AND PEAK
AROUND 11 FEET THIS AFTERNOON. 

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.

&&

$$

708 
WHUS76 KEKA 241549
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
849 AM PDT FRI SEP 24 2010

PZZ450-455-470-475-250000-
/O.CON.KEKA.SC.Y.0070.000000T0000Z-100925T0400Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
849 AM PDT FRI SEP 24 2010

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING. 

A LONG PERIOD NW SWELL IS BUILDING THIS MORNING AND WILL PEAK
AROUND 11 FEET THIS AFTERNOON.

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.

&&

$$

897 
WHUS76 KEKA 242125
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
225 PM PDT FRI SEP 24 2010

PZZ450-455-470-475-250400-
/O.CON.KEKA.SC.Y.0070.000000T0000Z-100925T0400Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
225 PM PDT FRI SEP 24 2010

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING. 

THE LONG PERIOD SWELL THAT HAS MOVED INTO THE WATERS TODAY WILL
SUBSIDE THIS EVENING AND OVERNIGHT. AS SUCH...THE FORECAST AREA
WILL FALL BELOW ADVISORY LEVEL TONIGHT. ANOTHER FALL TIME SWELL
TRAIN WILL MOVE INTO THE WATERS ON SUN.

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.

&&

$$

347 
WHUS76 KEKA 250343
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
843 PM PDT FRI SEP 24 2010


PZZ450-455-470-475-250445-
/O.EXP.KEKA.SC.Y.0070.000000T0000Z-100925T0400Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
843 PM PDT FRI SEP 24 2010

...SMALL CRAFT ADVISORY WILL EXPIRE AT 9 PM PDT THIS EVENING...

THE SMALL CRAFT ADVISORY WILL EXPIRE AT 9 PM PDT THIS EVENING. 

THE LONG PERIOD SWELL AFFECTING THE WATERS WILL SUBSIDE 
OVERNIGHT...DIMINISHING TO 6 TO 8 FEET BY SATURDAY MORNING. ANOTHER
LARGE LONG PERIOD WAVE TRAIN WILL MOVE INTO THE WATERS ON SUNDAY.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
213 AM PDT THU SEP 23 2010

.SYNOPSIS...AFTER THE PATCHY MORNING FOG LIFTS...A WEAK TROUGH
WILL MOVE THROUGH THE REGION RESULTING IN PASSING MID LEVEL
CLOUDS. A STRONG WARMING TREND IS EXPECTED FOR THIS WEEKEND AND
EARLY NEXT WEEK...ESPECIALLY FOR INLAND AREAS DUE TO A
STRENGTHENING UPPER RIDGE.

&&

.DISCUSSION...EARLY MORNING SURFACE ANALYSIS SHOWS ELONGATED HIGH
PRESSURE RIDGE AXIS JUST OFFSHORE...RESULTING IN OFFSHORE WINDS AND
ATYPICAL CLEAR CONDITIONS ALONG THE IMMEDIATE COAST.
HOWEVER...PATCHES OF RADIATIONAL FOG ARE DEVELOPING JUST INLAND AND
ARE EXPECTED TO EXPAND THROUGH THE EARLY MORNING HOURS. STRONG UPPER
LOW CURRENTLY PUSHING ASHORE THE BRITISH COLUMBIA COAST PER WATER
VAPOR IMAGERY WILL DRAG A WEAK TRAILING FRONT THROUGH THE NORTH
COAST TODAY. MAY SEE SOME PASSING MID-LEVEL CLOUDS...OTHERWISE NO
MAJOR WEATHER EFFECTS FROM SAID LOW HERE.

ZONAL FLOW CONTINUES ALOFT THEN CONTINUES THROUGH FRIDAY...UNTIL NE
PACIFIC LONG WAVE TROUGH DEEPENS AND STRONG RIDGE BUILDS OVER THE
WESTERN CONUS FOR THE WEEKEND. EXTENDED MODELS AGREE...THIS WILL
BRING A RETURN TO HOT AND DRY WEATHER FOR THE WEEKEND AND EARLY NEXT
WEEK. OFFSHORE FLOW EARLY NEXT WEEK WITH VERY WARM TEMPERATURES
COULD RESULT IN SOME FIRE WEATHER CONCERNS DESPITE RECENT RAINFALL.
WILL CONTINUE TO MONITOR. HENRY

&&

.AVIATION...STRATUS/FOG EARLY THIS MORNING BOTH INLAND AND ALONG THE
COAST IS MUCH LESS PREVALENT THAN IN PREVIOUS NIGHTS...WITH
ONLY PATCHY MVFR CONDITIONS NOTED. A DECAYING FRONTAL BOUNDARY
MOVING IN FROM THE WEST WILL BRING INCREASING HIGH-BASED STRATUS TO
THE REGION BY LATE MORNING...BUT VFR CONDITIONS ARE STILL EXPECTED
TO PREVAIL. BURGER

&&

.MARINE...WINDS AND SEAS REMAIN SUBDUED FOR THE TIME BEING. SWELL
GENERATED FROM A LOW COMPLEX CURRENTLY LOCATED AROUND 51N/137W WILL
CONTINUE TO PROPAGATE SOUTHEAST...WITH FORERUNNERS REACHING OUR
WATERS LATE THIS AFTERNOON. THIS SWELL TRAIN SHOULD PEAK AROUND 10
FT EARLY FRI...WHICH WOULD PLACE IT AT BORDERLINE ADVISORY LEVELS.
PERIODS OF 13 TO 15 SEC IMPLY DEEP WATER STEEPNESS NOT PARTICULARLY
GREAT...BUT W AND NW FACING BEACHES MAY SEE BREAKERS UP TO 14 FT.
THIS SWELL WILL BE REINFORCED SAT NIGHT/SUN AS WAVE ENERGY FROM A
VERY DEEP 948 MB SURFACE LOW TRAVERSING THE GULF OF ALASKA
ARRIVES...BRINGING SEAS OF AROUND 14 FT LOCALLY. BURGER

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...NONE.
&&

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
405 AM PDT THU SEP 23 2010

CAZ001>004-076-241330-
REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR-
UPPER TRINITY RIVER-MENDOCINO INTERIOR-
405 AM PDT THU SEP 23 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.