Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 282206
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
306 PM PDT THU MAY 28 2015

.SYNOPSIS...DRY AND WARMER WEATHER WILL CONTINUE ACROSS THE
INTERIOR THROUGH SATURDAY AS A HIGH PRESSURE RIDGE PERSISTS
ACROSS THE AREA. A WEAK COLD FRONT WILL APPROACH THE AREA SUNDAY
PRODUCING COOLER TEMPERATURES INLAND AND SOME LIGHT SHOWERS.

&&

.SHORT TERM...(THROUGH SUNDAY NIGHT)...A HIGH PRESSURE RIDGE WILL
PERSIST ACROSS THE REGION THROUGH SATURDAY. CLOUDINESS HAS
DECREASED INLAND AND TEMPERATURES WILL CONTINUE TO INCREASE
SLIGHTLY EACH DAY THROUGH SATURDAY. MOSTLY CLOUDY TO OVERCAST
SKIES WILL CONTINUE ALONG COASTAL AREAS OVERNIGHT WITH PATCHY FOG
OCCURRING ACROSS PORTIONS OF THE COASTAL AREAS. WEAK INSTABILITY
MAY GENERATE A FEW ISOLATED SHOWERS OVER THE TRINITY MOUNTAINS AND
YOLLA BOLLYS THE NEXT FEW AFTERNOONS OR EVENINGS. A WEAK COLD
FRONT WILL APPROACH THE AREA SUNDAY POSSIBLY PRODUCING SHOWERS TO
ALL AREAS SUNDAY EVENING INTO MONDAY. TEMPERATURES WILL DECREASE
SUNDAY AND MONDAY AS CLOUD COVERAGE INCREASES ACROSS THE AREA
ASSOCIATED WITH THE WEAK COLD FRONT.

.LONG TERM (MONDAY THRU WEDNESDAY)...THE WEST COAST RIDGE WILL
FLATTEN WITH THE APPROACHING SHORTWAVE EARLY NEXT WEEK BRINGING NEAR
NORMAL TEMPERATURES AND A CHANCE FOR SHOWERS SUNDAY THROUGH MONDAY
WITH LINGERING SHOWERS POSSIBLE ON TUESDAY. STORM TOTAL RAINFALL
SHOULD NOT BE SIGNIFICANT LOOKING TO PEAK NEAR 1 INCH TO THE NORTH
WITH MOST OTHER AREAS LIKELY OBSERVING LESS THAN 0.5 INCHES.
HOWEVER, IT IS STILL A LITTLE EARLY TO PIN POINT RAINFALL TOTALS
THIS FAR IN ADVANCE. ZONAL FLOW EARLY NEXT WEEK WILL TRANSITION TO
RIDGING LATE IN THE WEEK MEANING A RETURN OF WARMER TEMPERATURES AND
DRYING WEATHER. AS A RESULT POPS TAPER TOWARDS CLIMATOLOGY BY LATE
NEXT WEEK. KML

&&

.AVIATION...STRATUS CONTINUED TO BLANKET THE COASTAL AREAS TODAY.
VIS` DROPPED TO IFR EARLY THIS MORNING RISING TO VFR AROUND 7 AM.
HOWEVER...CIGS WERE ANOTHER STORY AS IFR CONDITIONS PREVAILED
AROUND 500 TO 900 FT WITH TOPS AVERAGING 2000 FT. A FEW POCKETS OF
VERY BRIEF CLEARING WAS SLOW TO HAPPEN (WHICH MAKES SENSE) AS AN
INVASIVE STREAM OF HIGH CLOUDS MOVED ACROSS THE REGION INHIBITING
INCOMING SOLAR RADIATION...AND THEREFORE RESTRICTING MASS CLEARING.
YET...THERE IS STILL SOME HOPE OF LIMITED CLEARING INTO LATE
AFTERNOON/EARLY EVENING AS THE HIGH CLOUDS "SORT OF" THIN OUT.
EXCERPTS FROM THE MORNING DISCUSSION: "WITH THE FLOW REMAINING
ONSHORE AND NOTHING TO {REALLY} DISRUPT THE MARINE INVERSION EXPECT
STRATUS TO ADVECT BACK ONSHORE DURING THE AFTERNOON AND SPREAD INTO
THE ADJACENT COASTAL RIVER VALLEYS BY MID EVENING. THE LAYER SHOULD
COMPRESS SLIGHTLY TONIGHT WHICH WILL RESULT IN LESS INLAND INTRUSION
AND A FASTER DISSIPATION RATE IN THE NORTH COAST RIVER VALLEYS ON
FRIDAY." STRATUS DID NOT SPILL INTO THE INTERIOR VALLEYS TODAY AND
THEREFORE IS NOT EXPECTED TO MAKE IT INTO UKI OVERNIGHT. TAA/DUG


&&

.MARINE...NORTHERLY WINDS AND ELEVATED SHORT PERIOD SEAS WILL
PERSIST OFFSHORE TONIGHT. NORTHERLY WINDS AND THE SEAS WILL
GRADUALLY DIMINISH FRIDAY THROUGH THIS WEEKEND AS AN OFFSHORE HIGH
PRESSURE SYSTEM WEAKENS. A WEAK COLD FRONT WILL APPROACH THE AREA
ON SUNDAY. NORTHERLY WINDS AND LOW SHORT PERIOD SEAS WILL CONTINUE
ACROSS THE WATERS SUNDAY AND MONDAY. WINDS AND SEAS WILL INCREASE
ON TUESDAY PRIMARILY ACROSS THE SOUTHERN WATERS AS AN OFFSHORE
HIGH PRESSURE RIDGE STRENGTHENS AND INTERACTS WITH AN INLAND LOW
PRESSURE TROUGH INCREASING THEN PRESSURE GRADIENT.



&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL 3 AM PDT SATURDAY FOR PZZ475.

&&

$$

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