Weather Service Report


263 
FXUS66 KEKA 271113
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
413 AM PDT WED AUG 27 2014

.SYNOPSIS...AN UPPER LEVEL RIDGE WILL REMAIN OVER THE WEST COAST
THROUGH THURSDAY...RESULTING IN SLIGHTLY ABOVE NORMAL TEMPERATURES
ACROSS THE INTERIOR AND DRY CONDITIONS. TEMPERATURES WILL BEGIN
TRENDING DOWNWARD ON FRIDAY AS THE RIDGE MOVES INLAND AND IS
REPLACED BY AN UPPER LEVEL TROUGH.

&&

.DISCUSSION...A GENERALLY QUIET WX PATTERN CONTINUES. AN UPPER
RIDGE WILL REMAIN OVER THE W COAST INTO WED, THEN WEAKEN AS AN
UPPER TROF DIGS OVER THE GULF OF AK AND OFF THE PAC NW COAST LATE
THIS WEEK. TEMPERATURES WILL BE WARM THRU THU OVER THE INTERIOR,
THEN DROP BACK TO NEAR NORMAL FOR THE WEEKEND. LOW CLOUDS WILL
CONTINUE OVER THE COASTAL WATERS AND IMMEDIATE COAST THIS WEEK,
WITH CLOUDS PULLING BACK TO THE COAST DURING EACH AFTERNOON.
MODELS REMAIN CONSISTENT HAVING THE REMNANTS OF HURRICANE MARIE
STAYING S OF THE APPROACHING UPPER TROF. WITH LIMITED TO NO
MOISTURE BEING ENTRAINED INTO THE TROF, DROPPED POPS FOR THIS
WEEKEND. OTHERWISE, LOADED MOST OF THE GRIDS WITH THE CONSMODEL.

&&

.AVIATION...UPPER LEVEL RIDGING WILL CONTINUE TO BUILD OVER THE
WEST COAST RESULTING IN A COMPACT MARINE LAYER AND THICK FOG ALONG
THE IMMEDIATE COASTLINE. WITH THE MARINE LAYER INVERSION EXPECTED
TO REMAIN STRONG TODAY...COASTAL CLOUDS WILL LIKELY REMAIN IN
PLACE WITH LIFR CONDITIONS EXPECTED THOUGH SOME BRIEF CLEARING MAY
BE POSSIBLE AT THE TERMINALS AS THE CLOUDS PULL BACK TOWARD THE
COAST THIS AFTERNOON.

VFR WILL PREVAIL ACROSS MUCH OF THE INTERIOR. SOME AREAS WILL SEE
VISIBILITY RESTRICTIONS DUE TO WILDFIRE SMOKE IN NORTHERN
HUMBOLDT...NORTHERN TRINITY AND DEL NORTE COUNTIES. RPA

&&

.MARINE...A RIDGE OF HIGH PRESSURE OVER THE WEST COAST WILL ALLOW
THE PRESSURE GRADIENT TO REMAIN WEAK. A MODERATELY STRONG THERMAL
TROUGH WILL KEEP SOME LIGHT TO MODERATE NORTHERLIES IN THE WATERS
WITH SOME SMALL SHORT PERIOD WAVES THROUGH THE END OF THE WEEK.
THE RIDGE WILL SLIDE OFF THE WEST COAST THIS WEEKEND INTO EARLY
NEXT WEEK ALLOWING A TROUGH TO MOVE INTO THE INTERIOR WESTERN
UNITED STATES. THIS WILL TIGHTEN THE PRESSURE GRADIENT OVER THE
WATERS WITH NORTHERLY WINDS INCREASING BACK INTO SMALL CRAFT AND
POSSIBLY TO NEAR GALE.

SOUTHERLY SWELL ORIGINATING FROM HURRICANE MARIE OFF THE COAST OF
MEXICO IS CONTINUING TO BUILD INTO THE WATERS. BUOY DATA OFF
CENTRAL AND SOUTHERN CALIFORNIA INDICATES THE SWELL MAY BE A FEW
FEET SMALLER THAN PREDICTED BY SWAN...SO ONCE AGAIN OPTED TO ONLY
USE 60 PERCENT OF THE MODEL PREDICTED WAVE HEIGHTS. STILL THIS
WILL RESULT IN WAVES OF 2 TO 5 FEET AT 15 TO 18 SECONDS TODAY INTO
THURSDAY. WHEN THESE WAVES REACH THE COAST THEY WILL RESULT IN
INCREASED CURRENTS AND OCCASIONAL LARGE WAVE SETS...ESPECIALLY ON
SOUTH FACING BEACHES. A MARINE WEATHER STATEMENT WAS ISSUED TO
HIGHLIGHT THE POTENTIAL THREATS TO MARINERS INCLUDING: STRONGER
CURRENTS, INCREASED SHOALING HAZARDS THROUGH WAVE SET BEHAVIOR,
AND THE IMPACT OF SOUTH AND SOUTHWEST FACING ANCHORAGES AND COVES
THAT ARE TYPICALLY SHELTERED FROM NORTHWEST WAVES. IN ADDITION,
THE SWELL POSES A THREAT TO INDIVIDUALS THAT RECREATE IN OR NEAR
THE OCEAN INCLUDING: SURFERS, ABALONE DIVERS, AND BEACH GOERS.
RPA/KML

&&

.EKA WATCHES/WARNINGS/ADVISORIES...

CA...NONE.

NORTHWEST CALIFORNIA COASTAL WATERS...NONE.

&&

$$

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