Area Forecast Discussion
Issued by NWS Eureka, CA

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FXUS66 KEKA 292222
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
322 PM PDT MON SEP 29 2014

.SYNOPSIS...A DISSIPATING FRONT WILL BRING SOME VERY LIGHT RAIN
OR DRIZZLE TO AREAS PRIMARILY NORTH CAPE MENDOCINO LATE THIS
EVENING AND OVERNIGHT. A DRYING AND WARMING TREND WILL BEGIN MID
TUESDAY AFTERNOON AND CONTINUE THROUGH THE END OF THE WEEK AS A
STRONG RIDGE OF HIGH PRESSURE BUILDS ACROSS THE REGION.

&&

.SHORT TERM...VISIBLE SAT SHOWS A WEAK FRONT APPROACHING THE
AREA. IN ASSOCIATION WITH THIS FRONT THE MARINE LAYER HAS DEEPENED
AND IT BROUGHT SOME DRIZZLE TO THE COAST NORTH OF CAPE MENDOCINO
THIS MORNING. TONIGHT THIS FRONT WILL MOVE INLAND AND BRING SOME
DRIZZLE OR LIGHT RAIN SHOWERS TO AREAS NORTH OF CAPE MENDOCINO
TONIGHT. RAINFALL AMOUNTS WILL ONLY BE A FEW HUNDREDTHS OF AN INCH
AT MOST. THIS WILL ALSO BRING SOME MID LEVEL CLOUDS TO THE AREA
NORTH OF CAPE MENDOCINO WHILE VALLEY FOG AND LOW CLOUDS ARE LIKELY
SOUTH OF THE CAPE.

TUESDAY MORNING HIGH PRESSURE WILL START TO QUICKLY BUILD INTO
THE AREA. THIS WILL LIKELY BRING SOME GUSTY NORTH WINDS OVER THE
RIDGES AND ALONG THE COAST. THIS WILL ALSO BRING MUCH DRIER AIR TO
INLAND AREAS. IF FUELS WERE DRY ENOUGH THIS COULD CREATE SOME
HAZARDOUS FIRE WEATHER CONDITIONS...HOWEVER WITH THE RECENT RAINS
THERE SHOULD BE ENOUGH MOISTURE AROUND TO LIMIT THE FIRE
POTENTIAL. HAVE ADDED HEADLINES TO THE FIRE WEATHER FORECAST TO
HIGHLIGHT THE THREAT. TUESDAY NIGHT WILL LIKELY BE THE COLDEST
NIGHT AND THERE IS THE POTENTIAL FOR SOME FROST IN THE COLDEST
VALLEYS OF TRINITY COUNTY. TEMPERATURES ALOFT START WARMING AND
THERE IS STILL THE POSSIBILITY OF SOME LOW CLOUDS AND FOG IN THE
VALLEYS SO CONFIDENCE IS TOO LOW TO ISSUE A FROST ADVISORY...BUT
WILL CONTINUE TO MENTION IT IN THE HWO.

WEDNESDAY AND THURSDAY HIGH PRESSURE CONTINUES TO BUILD INTO THE
AREA. THIS WILL WARM TEMPERATURES INLAND. WINDS WILL RELAX A BIT
AS HIGH PRESSURE BECOMES MORE CENTERED OVER THE AREA. OFFSHORE
FLOW LOOKS TO THE COAST FAIRLY CLEAR WHICH SHOULD ALLOW
TEMPERATURES TO DROP INTO THE 40S EACH NIGHT. COASTAL CLOUDS WILL
LIKELY BE LIMITED TO THE IMMEDIATE COAST. MKK

&&

.LONG TERM...FRIDAY 500 MB HEIGHTS LOOK TO PEAK OVER THE AREA AND
THIS SHOULD BRING SOME OF THE WARMEST TEMPERATURES OF THE WEEK TO
INLAND AREAS. FOR THE WEEKEND THE HIGH PRESSURE STARTS TO BREAK
DOWN A BIT. COASTAL CLOUDS WILL LIKELY COME BACK AT SOME POINT AS
THE RIDGE BREAKS DOWN...BUT TIMING IS STILL DIFFICULT TO JUDGE AT
THIS POINT. THE ECMWF SHOWS A WEAK SHORTWAVE RIDING OVER OF THE
RIDGE ON MONDAY. THE GFS SHOWS A SIMILAR WAVE WEAKENING THE RIDGE
A BIT. UNLESS THIS FEATURE STRENGTHENS THE MAIN IMPACT WILL LIKELY
BE INCREASED COASTAL CLOUDS...SLIGHTLY COOLER INLAND TEMPERATURES
AND POSSIBLY SOME DRIZZLE AT THE COAST. MKK

&&

.AVIATION...MVFR CONDITIONS AND LIGHT WINDS WILL CONTINUE AT KCEC
AND KACV THROUGH THE EARLY EVENING AS A WEAK COLD FRONT MOVING
THROUGH THE AREA HAS INCREASED CLOUD COVER REDUCING CEILINGS.  THE
WINDS WILL BECOME LIGHT TO CALM OVERNIGHT. CEILINGS AND/OR
VISIBILITIES WILL DIMINISH TO IFR CONDITIONS AT KCEC AND KACV
OVERNIGHT WITH STRATUS AND PATCHY FOG INCREASING ALONG COASTAL
AREAS. VFR CONDITIONS AND LIGHT WINDS TO CALM CONDITIONS WILL
CONTINUE AT KUKI THROUGH TUESDAY.

&&

.MARINE...NORTHERLY WINDS AND THE SEAS HAVE DIMINISHED TODAY AS A
WEAK COLD FRONT MOVED THROUGH THE AREA RELAXING THE PRESSURE
GRADIENT. A HIGH PRESSURE RIDGE WILL BUILD ACROSS THE AREA IN THE
WAKE OF THE FRONT INCREASING THE PRESSURE GRADIENT ACROSS THE
WATERS. NORTHERLY WINDS AND THE SEAS WILL INCREASE TUESDAY AND
WEDNESDAY AS THE HIGH PRESSURE SYSTEM STRENGTHENS. WINDS AND SEAS
WILL BE HIGHER ACROSS THE OUTER WATERS. WINDS AND SEAS WILL DIMINISH
THURSDAY AND FRIDAY AS A LOW PRESSURE TROUGH DEVELOPS ACROSS COASTAL
CALIFORNIA RELAXING THE PRESSURE GRADIENT.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY FROM 2 AM TUESDAY TO 5 PM PDT WEDNESDAY FOR
     PZZ470.

     SMALL CRAFT ADVISORY FROM 2 AM TUESDAY TO 5 PM PDT WEDNESDAY FOR
     PZZ475.

&&

$$

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