Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 042215
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
315 PM PDT FRI SEP 4 2015

.SYNOPSIS...NEAR TO BELOW NORMAL TEMPERATURES WILL CONTINUE
THIS WEEKEND AS A LOW PRESSURE TROUGH MOVES ACROSS THE REGION.
THERE IS A SLIGHT CHANCE FOR ISOLATED SHOWERS ACROSS THE INTERIOR
THIS EVENING. A FEW ISOLATED THUNDERSTORMS ARE POSSIBLE OVER
NORTHEASTERN TRINITY COUNTY THIS EVENING.

&&

.DISCUSSION...AN UPPER LEVEL LOW PRESSURE TROUGH WILL NORTH OF THE
AREA WILL PROPAGATE NORTHEASTWARD TONIGHT AND SATURDAY. THE UPPER
LEVEL LOW WILL RESULT IN NEAR TO BELOW NORMAL TEMPERATURES
CONTINUING ACROSS THE REGION THROUGH THIS WEEKEND. THE LOW
PRESSURE TROUGH WILL PRODUCE A SLIGHT CHANCE FOR SHOWERS PRIMARILY
ACROSS THE NORTHERN AND INLAND AREAS THIS AFTERNOON AND EVENING.
A FEW ISOLATED THUNDERSTORMS ARE POSSIBLE PRIMARILY ACROSS
NORTHEASTERN TRINITY COUNTY THIS EVENING. DRIER CONDITIONS AND
WARMER TEMPERATURES WILL PREVAIL OVER THE INTERIOR NEXT WEEK AS A
HIGH PRESSURE RIDGE BUILDS ACROSS THE REGION.

&&

.AVIATION...VFR WILL CONTINUE TO PREVAIL AT KACV...KCEC AND KUKI
TODAY UNDER A COOL AND DRY NORTHERLY FLOW REGIME. SOME FLEETING
CLOUDS MAY FORM TONIGHT, HOWEVER, ONLY BRIEF MVFR CEILINGS ARE
EXPECTED AT THE COASTAL AIR TERMINALS. INTERIOR VALLEYS CAN EXPECT
SOME CEILINGS TO DEVELOP AGAIN TONIGHT SIMILARLY TO LAST NIGHT. SOME
LIGHT SHOWERS MAY DEVELOP LATE THIS AFTERNOON BUT THEY SHOULD MOSTLY
BE ACROSS SISKIYOU COUNTY. DUG/KML


&&

.MARINE...FRESH TO STRONG NORTHERLY WINDS WILL PERSIST THROUGH EARLY
NEXT WEEK AS SURFACE HIGH PRESSURE OFFSHORE PINCHES THE PRESSURE
GRADIENT AGAINST THE COASTAL THERMAL TROUGH. NEAR GALE FORCE WIND
GUSTS WILL DEVELOP TONIGHT ACROSS THE OUTER WATERS AS THE GRADIENT
FURTHER STRENGTHENS BEHIND A PASSING SHORTWAVE. WIND GUSTS REACHING
AROUND 25 KT MAY BE OBSERVED ACROSS THE INNER WATER ZONES ESPECIALLY
AROUND CAPE MENOCINO AND POINT ARENA TONIGHT AND SATURDAY AFTERNOON.
THOUGH THESE AREAS MAY REACH SMALL CRAFT CRITERIA WE DECIDED TO
WITHHOLD FROM ISSUING ADVISORIES FOR THE NEARSHORE ZONES AS THE
MINIMAL COVERAGE AND LONGEVITY OF THESE GUSTS WILL BE MARGINAL.
HOWEVER, IF SURFACE OBSERVATIONS INDICATE MORE WIDESPREAD GUSTS
AND/OR STEEP SEAS WE MAY GO AHEAD WITH AN ADVISORY.

STEEP, SHORTER PERIOD SEAS WILL CONTINUE THROUGH EARLY NEXT WEEK AS
FRESH NORTHERLY WINDS PERSIST. BUOY OBSERVATIONS EARLY THIS
AFTERNOON SHOWED THE DOMINATING WAVES AROUND 5 TO 7 FT AT 10 SECONDS
WITH A HINT OF A SMALL SOUTHWESTERLY SWELL. WAVES SHOULD BECOME
STEEPER THROUGH THE WEEKEND. FURTHERMORE MODELS SHOW TWO SWELL
SYSTEMS PROPAGATING THROUGH THE COASTAL WATERS THROUGH EARLY NEXT
WEEK. THE FIRST OF THESE SYSTEMS IS FORECAST TO BUILD NEAR 2 FT
AROUND 18 SECONDS ON SUNDAY AND THE SECOND TO BUILD NEAR 3 FT AROUND
17 SECONDS BY TUESDAY. LITTLE IMPACTS ARE EXPECTED FOR MARINERS IN
DEEP WATER, HOWEVER, INDIVIDUALS NEARSHORE OR IN THE SURF ZONE COULD
SEE STRONGER CURRENTS ESPECIALLY SOUTH OF CAPE MENDOCINO. KML


&&

.FIRE WEATHER...BELOW NORMAL TO NEAR NORMAL TEMPERATURES WILL
CONTINUE THIS WEEKEND AS A LOW PRESSURE TROUGH MOVES ACROSS THE
REGION. THE LOW WILL PRODUCE A SLIGHT CHANCE FOR SHOWERS OVER THE
INTERIOR THIS AFTERNOON AND EVENING. A FEW ISOLATED THUNDERSTORMS
ARE POSSIBLE OVER NORTHEASTERN TRINITY COUNTY LATE THIS AFTERNOON
OR EARLY EVENING. OTHERWISE LITTLE TO NO RAIN IS EXPECTED. ABOVE
NORMAL TEMPERATURES AND DRY CONDITIONS WILL PREVAIL ACROSS THE
INTERIOR NEXT WEEK. THE DRIER CONDITIONS WILL RESULT IN POOR
HUMIDITY RECOVERIES AT HIGHER ELEVATIONS OVERNIGHT NEXT WEEK.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     FROST ADVISORY FROM 3 AM TO 9 AM PDT SATURDAY FOR CAZ004.

NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL 5 AM PDT WEDNESDAY FOR PZZ470.

     SMALL CRAFT ADVISORY UNTIL 5 AM PDT WEDNESDAY FOR PZZ475.

&&

$$

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