Small Craft Advisory 19, NWS Eureka, CA

314 
WHUS76 KEKA 260358
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
858 PM PDT SAT APR 25 2009

PZZ470-261200-
/O.UPG.KEKA.SC.Y.0018.000000T0000Z-090426T1500Z/
/O.NEW.KEKA.SE.W.0015.090426T1000Z-090427T0000Z/
/O.EXB.KEKA.SW.Y.0027.000000T0000Z-090426T1000Z/
/O.CAN.KEKA.GL.W.0062.090426T1500Z-090427T0600Z/
/O.NEW.KEKA.SI.Y.0032.090426T0358Z-090428T0000Z/
/O.CAN.KEKA.SC.Y.0019.090427T0600Z-090428T0000Z/
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
858 PM PDT SAT APR 25 2009

...SMALL CRAFT ADVISORY FOR WINDS IN EFFECT UNTIL 5 PM PDT
MONDAY...
...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT UNTIL 3 AM
PDT SUNDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 3 AM TO 5 PM PDT
SUNDAY...

THE PRESSURE GRADIENT WILL CONTINUE TO TIGHTEN OVERNIGHT INCREASING
WINDS AND BUILDING SEAS BY EARLY SUNDAY. A WEAK LOW IN THE PACIFIC
NORTHWEST WILL CAUSE THE PRESSURE GRADIENT TO RELAX ALLOWING
WINDS AND SEAS TO DIMINISH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HAZARDOUS SEAS WARNING MEANS HAZARDOUS SEA CONDITIONS ARE
IMMINENT OR OCCURRING. RECREATIONAL BOATERS SHOULD REMAIN IN
PORT...OR TAKE SHELTER UNTIL WAVES SUBSIDE.  COMMERCIAL VESSELS
SHOULD PREPARE FOR ROUGH SEAS<85>AND CONSIDER REMAINING IN PORT
OR TAKING SHELTER IN PORT UNTIL HAZARDOUS SEAS SUBSIDE.

A SMALL CRAFT ADVISORY FOR WIND MEANS THAT WIND SPEEDS OF 21 TO
33 KNOTS ARE EXPECTED. INEXPERIENCED MARINERS...ESPECIALLY THOSE
OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE
CONDITIONS.

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.

&&

$$

PZZ455-261200-
/O.UPG.KEKA.SC.Y.0018.000000T0000Z-090426T1500Z/
/O.NEW.KEKA.SE.W.0015.090426T1000Z-090427T0000Z/
/O.EXB.KEKA.SW.Y.0027.000000T0000Z-090426T1000Z/
/O.CAN.KEKA.GL.W.0062.090426T1500Z-090427T0600Z/
/O.NEW.KEKA.SI.Y.0032.090426T0358Z-090427T2100Z/
/O.CAN.KEKA.SC.Y.0019.090427T0600Z-090427T2100Z/
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
858 PM PDT SAT APR 25 2009

...SMALL CRAFT ADVISORY FOR WINDS IN EFFECT UNTIL 2 PM PDT
MONDAY...
...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT UNTIL 3 AM
PDT SUNDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 3 AM TO 5 PM PDT
SUNDAY...

THE PRESSURE GRADIENT WILL CONTINUE TO TIGHTEN OVERNIGHT INCREASING
WINDS AND BUILDING SEAS BY EARLY SUNDAY. A WEAK LOW IN THE PACIFIC
NORTHWEST WILL CAUSE THE PRESSURE GRADIENT TO RELAX ALLOWING
WINDS AND SEAS TO DIMINISH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HAZARDOUS SEAS WARNING MEANS HAZARDOUS SEA CONDITIONS ARE
IMMINENT OR OCCURRING. RECREATIONAL BOATERS SHOULD REMAIN IN
PORT...OR TAKE SHELTER UNTIL WAVES SUBSIDE.  COMMERCIAL VESSELS
SHOULD PREPARE FOR ROUGH SEAS<85>AND CONSIDER REMAINING IN PORT
OR TAKING SHELTER IN PORT UNTIL HAZARDOUS SEAS SUBSIDE.

A SMALL CRAFT ADVISORY FOR WIND MEANS THAT WIND SPEEDS OF 21 TO
33 KNOTS ARE EXPECTED. INEXPERIENCED MARINERS...ESPECIALLY THOSE
OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE
CONDITIONS.

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.

&&

$$

PZZ450-261200-
/O.CAN.KEKA.SC.Y.0018.000000T0000Z-090426T1500Z/
/O.EXB.KEKA.SW.Y.0027.000000T0000Z-090427T0600Z/
/O.CAN.KEKA.GL.W.0062.090426T1500Z-090427T0600Z/
/O.NEW.KEKA.SI.Y.0032.090426T0358Z-090427T0600Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
858 PM PDT SAT APR 25 2009

...SMALL CRAFT ADVISORY FOR WINDS IN EFFECT UNTIL 11 PM PDT
SUNDAY...
...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IN EFFECT UNTIL 11 PM
PDT SUNDAY...

THE PRESSURE GRADIENT WILL CONTINUE TO TIGHTEN OVERNIGHT INCREASING
WINDS AND BUILDING SEAS BY EARLY SUNDAY. A WEAK LOW IN THE PACIFIC
NORTHWEST WILL CAUSE THE PRESSURE GRADIENT TO RELAX ALLOWING
WINDS AND SEAS TO DIMINISH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY FOR WIND MEANS THAT WIND SPEEDS OF 21 TO
33 KNOTS ARE EXPECTED. INEXPERIENCED MARINERS...ESPECIALLY THOSE
OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE
CONDITIONS.

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.

&&

$$

PZZ475-261200-
/O.NEW.KEKA.SI.Y.0032.090426T0358Z-090426T1000Z/
/O.EXT.KEKA.SW.Y.0027.000000T0000Z-090426T1000Z/
/O.NEW.KEKA.SE.W.0015.090426T1000Z-090427T0600Z/
/O.EXT.KEKA.GL.W.0062.090426T1000Z-090427T0600Z/
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
858 PM PDT SAT APR 25 2009

...SMALL CRAFT ADVISORY FOR WINDS IN EFFECT UNTIL 3 AM PDT
SUNDAY...
...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT UNTIL
3 AM PDT SUNDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 3 AM TO 11 PM PDT
SUNDAY...
...GALE WARNING NOW IN EFFECT FROM 3 AM TO 11 PM PDT SUNDAY...

THE PRESSURE GRADIENT WILL CONTINUE TO TIGHTEN OVERNIGHT ALLOWING
GALE CONDITIONS TO DEVELOP OVER THE WATERS BY EARLY SUNDAY. THESE
INCREASED WINDS WILL BUILD SEAS TO 8 TO 10 FT OVERNIGHT. A WEAK
LOW IN THE PACIFIC NORTHWEST WILL CAUSE THE PRESSURE GRADIENT TO
RELAX ALLOWING WINDS AND SEAS TO DIMINISH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE
EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL
HAZARD TO SMALL CRAFT.

A HAZARDOUS SEAS WARNING MEANS HAZARDOUS SEA CONDITIONS ARE
IMMINENT OR OCCURRING. RECREATIONAL BOATERS SHOULD REMAIN IN
PORT...OR TAKE SHELTER UNTIL WAVES SUBSIDE.  COMMERCIAL VESSELS
SHOULD PREPARE FOR ROUGH SEAS<85>AND CONSIDER REMAINING IN PORT
OR TAKING SHELTER IN PORT UNTIL HAZARDOUS SEAS SUBSIDE.

A SMALL CRAFT ADVISORY FOR WIND MEANS THAT WIND SPEEDS OF 21 TO
33 KNOTS ARE EXPECTED. INEXPERIENCED MARINERS...ESPECIALLY THOSE
OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE
CONDITIONS.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
431 AM PDT SAT APR 25 2009

.SYNOPSIS...DRY WEATHER CONDITIONS WILL PREVAIL THROUGH THE WEEKEND.
AN UPPER LEVEL LOW FROM WESTERN CANADA WILL AFFECT THE REGION MONDAY
THROUGH WEDNESDAY WITH COOLER TEMPERATURES AND A CHANCE OF SHOWERS.

&&

.DISCUSSION...EARLY MORNING SATELLITE IMAGERY SHOWED LOW CLOUDS
ALONG THE COAST...PRIMARILY NORTH OF CAPE MENDOCINO. THE CLOUDS
HAVE EXTENDED INTO INTERIOR HUMBOLDT COUNTY AND INTO FAR NORTHERN
MENDOCINO COUNTY VIA THE EEL RIVER BASIN. THE LOW CLOUDS ALONG
WITH LIGHT ONSHORE WINDS HAVE KEPT TEMPERATURES FROM FALLING INTO
THE FROST ADVISORY RANGE OF 33-36F. THEREFORE...WIDESPREAD FROST
DEVELOPMENT IS UNLIKELY AND THE ADVISORY HAS BEEN CANCELLED. THE
MARINE INVERSION APPEARS HIGH AND WEAK...BUT EXPECT THE BULK OF
THE LOW CLOUDS TO MIX OUT BY THIS AFTERNOON WITH DAYTIME HEATING.
UPSLOPE FLOW WILL LIKELY LEAD TO MORE CLOUD GENERATION IN THE
AFTERNOON OVER HIGHER ELEVATIONS ALONG THE NORTH COAST...HOWEVER
OVERALL IT IS SHAPING UP TO BE A FINE DAY...WITH AFTERNOON TEMPS
UP 10-15 DEGREES ACROSS THE INTERIOR AND AWAY FROM THE OCEAN.

OTHER FEATURE OF NOTE ON WATER VAPOR IMAGERY IS THE SHORT-WAVE
TROUGH SKIRTING ACROSS NORTHERN WASHINGTON AS OF 11Z. GFS AND NAM12
WERE IN DECENT AGREEMENT ON DAMPING OUT THE TAIL END OF THIS
TROUGH THIS AFTERNOON...AS A RIDGE PUMPS UP INTO THE GULF OF AK.
TYPICALLY NORTH FLOW AND INSIDE SLIDER TYPES SHORT-WAVE TROUGHS
ARE DRY FOR NORTHWEST CALIFORNIA. NAM12 SHOWED NW CYCLONIC FLOW
DEVELOPING TONIGHT AS THE TROUGH PASSES INTO THE ROCKIES. THE
UPSLOPE NORTH FLOW AND MOIST AIR CONVERGENCE...MAY PRODUCE A FEW
LIGHT SHOWERS OVER THE HIGHER TERRAIN OF THE NORTH COAST. NEXT
SHORT-WAVE APPROACHES LATE SUNDAY NIGHT INTO MONDAY MORNING. GFS
AND EURO SOLUTIONS HAVE THE PARENT LOW REMAINING NEARLY STATIONARY
THROUGH MID WEEK. A COUPLE MORE SHORT-WAVE TROUGHS WILL PIN-WHEEL
AROUND THE PARENT LOW...AND OCCASIONALLY BRING RAIN CHANCES TO
THE FORECAST AREA. ON THU...THE POSITIVELY TILTED UPPER TROUGH...
WILL BEGIN TO SAG SOUTHEAST...WHILE HIGH PRESSURE FOLDS OVER THE
LOW AND INTO THE PAC NW. THIS SHOULD KEEP DAYTIME TEMPERATURES ON
THE COOL SIDE THROUGH THU NEXT SAT...BUT WITH SHOWER OPPORTUNITIES
DIMINISHING.

DJB

&&

.AVIATION...STRATUS WITH CEILINGS NEAR 2000 FEET WILL REMAIN ALONG
THE COAST THIS MORNING. NORTHWEST WINDS WILL PICK UP IN THE
AFTERNOON AND CLEAR STRATUS ALONG IMMEDIATE COAST.  LOCALIZED LOW
CLOUDS WILL LIKELY REMAIN ALONG THE COASTAL FOOTHILLS INTO THE
AFTERNOON. EXPECT THE STRATUS TO RETURN TO THE COAST LATE TONIGHT
AS THE WINDS EASE. INLAND FLIGHT CONDITIONS WILL REMAIN VFR WITH
BUMPY CONDITIONS NEAR MOUNTAIN PEAKS AND RIDGES IN THE AFTERNOON DUE
TO GUSTY NW WINDS. TH

&&

.MARINE...MODERATE TO STRONG WINDS WILL CONTINUE THROUGH THE
WEEKEND. THE SURFACE PRESSURE GRADIENT WILL TIGHTEN SUNDAY WITH
MARGINAL GALE CONDITIONS EXPECTED. GALE FORCE GUSTS WILL LIKELY
DEVELOP OVER THE SOUTHERN OUTER WATERS SUNDAY AND HAVE ISSUED A GALE
WATCH. AN AREA OF LOW PRESSURE WILL MOVE OVER THE WATERS MON AND TUE
AND WEAKEN THE SURFACE PRESSURE GRADIENT...AND THE WINDS WILL EASE.
A LONGER-PERIOD 2 TO 3 FT SOUTH TO SOUTHWEST SWELL WILL CONTINUE TO
MOVE ACROSS THE WATERS THROUGH THE WEEKEND.  THIS SWELL WILL HAVE
LITTLE EFFECT ON THE DEEP WATER WHICH WILL BE DOMINATED BY SHORT
PERIOD FRESH WAVES...BUT WILL MAKE ITS PRESENCE KNOWN IN THE SURF
ZONE AND SHALLOW WATER AREAS. TH

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY FROM 5 PM THIS AFTERNOON TO 11 PM PDT SUNDAY
FOR PZZ450.
SMALL CRAFT ADVISORY UNTIL 5 PM PDT MONDAY FOR PZZ470.
SMALL CRAFT ADVISORY UNTIL 2 PM PDT MONDAY FOR PZZ455.
GALE WATCH FROM SUNDAY MORNING THROUGH SUNDAY EVENING FOR PZZ475.
SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 8 PM PDT TUESDAY
FOR PZZ475.

&&

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

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE EUREKA CA
652 AM PDT SAT APR 25 2009

CAZ003-076-251500-
NORTH COAST INTERIOR-MENDOCINO INTERIOR-
652 AM PDT SAT APR 25 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.