243 
FXUS66 KEKA 071144
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
444 AM PDT FRI JUN 7 2013

.SYNOPSIS...
ABOVE NORMAL TEMPERATURES WILL CONTINUE ACROSS THE INTERIOR THROUGH
SATURDAY WITH WIDESPREAD SUNSHINE AS UPPER LEVEL HIGH PRESSURE
BUILDS OVER THE WEST COAST. THE IMMEDIATE COAST WILL CONTINUE TO
BATTLE LOW CLOUDS WITH COOLER TEMPERATURES.
&&

.DISCUSSION...SAT IMAGERY SHOWS STRATUS ALONG THE REDWOOD COAST
WITH MENDO COAST CLEARING EARLY THIS MORNING. LITTLE CHANGE TO THE
FCST WITH HOT TEMPS ACROSS THE INTERIOR. 850 MB TEMPS WILL WARM
SLIGHTLY TODAY...THEN PEAK AROUND 28C SAT AS UPPER RIDGE BUILDS
OVER THE REGION. THIS WILL RESULT IN MAX TEMPS AROUND 100-110
ACROSS MANY INLAND VALLEYS...WHICH WILL BE NEAR RECORDS FOR EARLY
JUNE IN MANY LOCATIONS. AN UPPER LEVEL LOW WILL MOVE UP THE COAST
SUN AS ANOTHER TROUGH MOVES INTO THE PAC NW. ISOLATED TSTMS WILL
LIKELY THREATEN...BUT WITH MOISTURE CONFINED THE THE MID
LEVELS...ACTIVITY WILL BE RESTRICTED TO THE MOUNTAINS OF EASTERN
TRINITY AND MENDOCINO COUNTIES. UPPER LEVEL TROUGH WILL PERSIST
OVER THE W COAST THROUGH NEXT WEEK RESULTING IN AN EXTENDED
PERIOD OF RELATIVELY COOLER BUT MORE SEASONABLE TEMPERATURES AND
DRY WEATHER.
&&

.AVIATION...MOSTLY IFR CONDITIONS WILL CONTINUE AT COASTAL LOCATIONS 
THROUGH THIS MORNING DUE TO STRATUS AND FOG. BETTER CHANCES FOR 
CLEARING NORTH OF THE CAPE TODAY AS NORTHERLY WINDS INCREASE... 
EXPECT SKIES TO CLEAR BY AFTERNOON TO VFR CONDITIONS AT KACV AND 
KCEC. IFR CONDITIONS WILL RETURN TO THE COASTAL SITES AS FOG AND 
STRATUS REDEVELOPS OVERNIGHT. OTHERWISE VFR CONDITIONS WITH A WARM 
AND STABLE AIRMASS ARE ANTICIPATED ACROSS THE INTERIOR WITH FAIRLY 
LIGHT SURFACE WINDS ON FRIDAY. 
&&

.MARINE...THE TIGHTENING PRESSURE GRADIENT BETWEEN THE OFFSHORE 
PACIFIC HIGH BUILDING INTO THE COAST AND THE STRENGTHENING THERMAL 
LOW OVER CALIFORNIA IS INCREASING THE STRONG NORTHERLY WINDS OVER 
COASTAL WATERS. THESE WINDS ARE EXPECTED TO STRENGTHEN INTO THE 
WEEKEND BUILDING LARGE SHORT PERIOD WAVES AND CAUSING GALES BEYOND 
TEN NAUTICAL MILES. SMALL CRAFT ADVISORIES AND POSSIBLY HAZARDOUS 
SEAS NEAR SHORE ARE ALSO EXPECTED. AN ASCAT PASS OVER NIGHT CONFIRMED
WINDS IN-LINE WITH FORECASTS. MODELS WERE CONSISTENT WITH WINDS 
HITTING SOLID GALE (35KT) TODAY AND A FULL GALE WITH PEAK GUSTS TO 
45 KT IN THE OUTER WATERS ON SAT->SUN. FOR THE MOST PART THESE 
STRONG WINDS WILL REMAIN OUTSIDE OF 10NM. SOME MAY BLEED INTO THE 
INNER WATERS AROUND CAPE MENDO AND AROUND PT ST GEORGE WHERE GUSTS 
TO 40 KT ARE POSSIBLE. THE MAIN IMPACT FOR THE INNER WATERS LOOKS TO 
BE THE INCREASING STEEP AND SHORT PERIOD SEAS. HAVE CONTINUED THE 
HAZARDOUS SEAS WATCH FOR THE INNER WATERS NORTH OF THE CAPE FOR FRI 
EVENING AS STILL NOT 80 PERCENT SURE WAVES WILL REACH WARNING 
LEVELS.   

CDIP BUOYS CONTINUE TO REGISTER THE LONG PERIOD S-SW SWELL FROM THE 
SOUTHERN HEMISPHERE THIS MORNING. IT WAS ABOUT 2 TO 3 FEET AT 
PERIODS AROUND 18 SECONDS. DURING PAST EVENTS WITH IMPACTS IN  
HARBORS SW SWELL WAS 3 TO 4 FEET WITH PERIODS IN EXCESS OF 20 
SECONDS. AS WE ARE NEAR THESE VALUES HAVE OPTED TO CONTINUE THE MWS 
FOR SOUTH FACING HARBORS AND COVES THROUGH THE MORNING. 
&&

.FIRE WEATHER...HOT WX WITH LOW RHS WILL CONTINUE THROUGH SAT AS
UPPER RIDGE CROSSES THE DISTRICT. DESPITE TEMPS INTO THE 100S AND
AFTERNOON RHS IN THE TEENS...WINDS WILL GENERALLY REMAIN LESS THAN
10 MPH AND WILL BE MAINLY TERRAIN DRIVEN. AN UPPER LEVEL
DISTURBANCE PASSING OVER NRN CA WILL BRING A SCHC OF TSTMS SUN AND
COOLER...MORE MOIST AIR TO NW CA. MODELS REMAIN CONSISTENT WITH
INCREASING MID LEVEL MOISTURE SUN...SO CONFIDENCE INCREASING
REGARDING CONVECTION SUN. STORMS WILL BE HIGH BASED AND RELATIVELY
DRY...BUT CONTINUE TO THINK COVERAGE WILL BE TOO ISOLATED TO
WARRANT A FIRE WX WATCH/WARNING FOR DRY LIGHTNING. 
&&

.EKA WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY UNTIL 5 AM PDT MON FOR PZZ450-455.
HAZARDOUS SEAS WATCH FROM THIS EVENING THROUGH LATE SUN FOR PZZ450.
GALE WARNING UNTIL 11 PM PDT MON FOR PZZ470. 
GALE WARNING UNTIL 11 AM PDT MON FOR PZZ475.
&&

$$

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