Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 272218
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
318 PM PDT WED MAY 27 2015

.SYNOPSIS...DRY AND WARMER WEATHER WILL PREVAIL ACROSS THE
INTERIOR THROUGH THIS WEEK AS A HIGH PRESSURE RIDGE BUILDS ACROSS
THE AREA. NIGHT AND MORNING LOW CLOUDS WITH PARTIAL AFTERNOON
CLEARING WILL CONTINUE ACROSS COASTAL AREAS.


&&

.SHORT TERM...(THROUGH SATURDAY EVENING)...A HIGH PRESSURE RIDGE
WILL BUILD INLAND THE NEXT FEW DAYS. THE HIGH PRESSURE RIDGE WILL
DECREASE CLOUDINESS INLAND AND TEMPERATURES WILL INCREASE SLIGHTLY
EACH DAY THROUGH THIS WEEK. MOSTLY CLOUDY SKIES WILL CONTINUE
ALONG COASTAL AREAS OVERNIGHT WITH PATCHY FOG OCCURRING ACROSS
PORTIONS OF THE COASTAL AREAS. WEAK INSTABILITY MAY GENERATE
ISOLATED SHOWERS OVER THE TRINITY MOUNTAINS AND YOLLA BOLLYS THE
NEXT FEW AFTERNOONS. A SIGNIFICANT LOW PRESSURE TROUGH WILL
APPROACH THE AREA THE END OF THIS WEEKEND POSSIBLY PRODUCING
SHOWERS TO ALL AREAS SUNDAY INTO MONDAY.

.LONG TERM (SUNDAY THRU TUESDAY)...THE WEST COAST RIDGE WILL FLATTEN
WITH THE APPROACHING SHORTWAVE TROUGH LATE THIS WEEKEND BRINGING
COOLER TEMPERATURES AND A CHANCE FOR SHOWERS. THE FIRST SHOT OF
SHOWERS IS PROGGED TO IMPACT NORTHWEST CALIFORNIA SUNDAY EVENING
WITH A SECONDARY SHORTWAVE BRINGING ANOTHER SHOT OF SHOWERS EARLY
MONDAY MORNING. THUNDERSTORM DEVELOPMENT DOES NOT LOOK GOOD WITH
THIS SYSTEM AS INSTABILITY IS LACKING AND A MID LEVEL CAP
STRENGTHENS. RAINFALL TOTALS ARE LOOKING ON THE LIGHTER SIDE WITH
THE BEST CHANCES FOR AREAS NORTH OF CAPE MENDOCINO. THE SITUATIONAL
AWARENESS TABLE SHOWS SOME HIGHER PWAT ANOMALIES ON MONDAY MORNING
WHICH INCREASES CONFIDENCE THAT THE BULK OF THE RAINFALL WILL BE FOR
NORTHERN PORTIONS OF THE FORECAST AREA. AS A RESULT POPS WERE
INCREASED ON SUNDAY AND MONDAY. BY THE MIDDLE OF NEXT WEEK LONG
RANGE MODELS SHOW RIDGING TO DEVELOP ONCE AGAIN...THUS TAPERED POPS
TOWARDS CLIMO THROUGH MID-WEEK. KML

&&

.AVIATION...STRATUS REMAINS INUNDATED ALONG THE COAST TODAY LIMITING
AIRFIELD CONDITIONS TO IFR WITH MOSTLY VFR ACROSS INTERIOR AREAS. WE
WILL CONTINUE WITH A PERSISTENCE FORECAST THIS TAF PERIOD AS LITTLE
IS CHANGING IN THE WEATHER PATTERN. EXPECT CLOUDS TO FILL BACK IN
ALONG THE COAST IN AREAS THAT MAY HAVE EXPERIENCED BRIEF SCATTERING
LATE THIS AFTERNOON. VISIBILITIES MAY EVEN COME DOWN AS THE
APPROACHING RIDGE AXIS FURTHER COMPRESSES THE MARINE LAYER. EXPECT
IFR TO LIFR ALONG THE COAST TONIGHT WITH MOSTLY VFR FOR INTERIOR
AIRFIELDS TONIGHT. KML


&&

.MARINE....NORTHERLY WINDS AND ELEVATED SHORT PERIOD SEAS WILL
PERSIST OFFSHORE THROUGH MID-WEEK DUE TO THE INTERACTION BETWEEN
AN OFFSHORE HIGH PRESSURE SYSTEM AND AN INLAND LOW PRESSURE TROUGH
INCREASING THE PRESSURE GRADIENT. CONDITIONS WILL IMPROVE LATE
THIS WEEK AS A LOW PRESSURE SYSTEM APPROACHES FROM THE NORTH.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL 3 AM PDT THURSDAY FOR PZZ470-475.

&&

$$

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