Hazardous Seas Warning 69, NWS Eureka, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
229 PM PDT THU JUL 1 2010

.SYNOPSIS...THE PASSING OF A WEAK FRONT MAY BRING A FEW SPRINKLES
OR VERY LIGHT SHOWERS TO AREAS NEAR THE OREGON BORDER
OVERNIGHT...OTHERWISE DRY WEATHER WILL CONTINUE. HIGH PRESSURE
WILL YIELD MUCH WARMER AFTERNOONS FOR INLAND AREAS BY INDEPENDENCE
DAY ALTHOUGH BREEZY CONDITIONS ARE EXPECTED ALONG THE COAST.

&&

.DISCUSSION...THE MAIN FORECAST CHALLENGE IS THE PRECIPITATION
THREAT FOR TONIGHT. A DECAYING FRONT WAS LOCATED ABOUT 200 NM
NORTHWEST OF EUREKA AT MID AFTERNOON...AND WAS SLOWLY SAGGING
SOUTH TOWARDS THE OR/CA BORDER. WHILE THIS FRONT WILL ESSENTIALLY
WASH OUT AS IT REACHES THE COAST...ENOUGH MOISTURE AND LIFT MAY
STILL BE PRESENT TO SQUEEZE OUT A FEW SPRINKLES/DRIZZLE/LIGHT
SHOWERS LATE TONIGHT NEAR THE OREGON BORDER. OTHERWISE...HIGH
PRESSURE WILL BEGIN TO BUILD INTO OREGON BY LATE TOMORROW YIELDING
BREEZY CONDITIONS WITH DECREASING CLOUDINESS. TEMPERATURES ALOFT
WILL WARM SIGNIFICANTLY OVER THE WEEKEND...WITH AFTERNOON READINGS
APPROACHING THE CENTURY MARK FOR THE WARMEST INLAND VALLEYS BY
INDEPENDENCE DAY. ALONG THE COAST...PLEASANT BUT BREEZY WEATHER IS
EXPECTED FOR THE WEEKEND. AS SURFACE PRESSURES FALL SUNDAY AND THE
OFFSHORE FLOW BEGINS TO WEAKEN...MARINE STRATUS WILL LIKELY FORM
OFFSHORE AND SOUTH OF THE CAPE BY LATE SUNDAY. IT IS STILL
AMBIGUOUS WHETHER COASTAL FIREWORKS CELEBRATIONS WILL FEATURE
MULTI-COLORED CLOUDS OR FAVORABLE WEATHER...BUT THE PATTERN
CERTAINLY IS IN THE PROCESS OF TRANSITIONING TO ONE WITH MORE
CLOUDS BY THAT TIME. STAY TUNED. MEDIUM RANGE MODELS HAVE BEEN
HINTING AT AN INCREASE IN MID LEVEL MOISTURE BY THE MIDDLE OF NEXT
WEEK...WHICH MAY GIVE RISE TO A FEW AFTERNOON/EVENING THUNDERSTORMS
OVER TRINITY COUNTY. BURGER

&&

.AVIATION...IFR/MVFR STRATUS AND DRIZZLE ARE EXPECTED TO MAKE A
RETURN LATE TONIGHT/EARLY SATURDAY ALONG THE REDWOOD COAST AS A WEAK
TROUGH MOVES THROUGH TO THE NORTH. VFR CONDITIONS WILL PREVAIL
FARTHER INLAND. HENRY

&&

.MARINE...A TEMPORARY BREAK IN FRESH N WINDS WILL
CONTINUE. HOWEVER AS THE PRESSURE GRADIENT TIGHTENS THROUGH THE
WEEKEND UNDER NORTHERLY FLOW...WINDS WILL INCREASE RAPIDLY FRIDAY
AFTERNOON. GALE FORCE WINDS AND HAZARDOUS SEAS ARE EXPECTED ACROSS
THE OUTER WATERS AND WILL CONTINUE WATCHES ACCORDINGLY. EARLY NEXT
WEEK...WINDS WILL DIMINISH AS A WEAK TROUGH MOVES OVERHEAD...BUT A
LONG PERIOD /16 TO 18 SEC/ SW SWELL LOOKS TO BUILD TO 4 OR 5
FT...LIKELY AFFECTING SW FACING BEACHES. HENRY

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.

NORTHWEST CALIFORNIA COASTAL WATERS...

GALE WATCH FROM SATURDAY MORNING THROUGH TUESDAY MORNING PZZ470.

HAZARDOUS SEAS WATCH FROM SATURDAY MORNING THROUGH TUESDAY
MORNING PZZ470.

SMALL CRAFT ADVISORY UNTIL 2 AM PDT MONDAY PZZ455.

GALE WATCH FROM LATE FRIDAY NIGHT THROUGH MONDAY MORNING PZZ475.

SMALL CRAFT ADVISORY UNTIL 3 AM PDT SATURDAY PZZ475.

HAZARDOUS SEAS WATCH FROM LATE FRIDAY NIGHT THROUGH MONDAY
MORNING PZZ475.

&&

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