Weather Service Report


634 
FXUS66 KEKA 032238
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
238 PM PST TUE MAR 3 2015

.SYNOPSIS...HIGH PRESSURE WILL BUILD OVER NORTHWEST CALIFORNIA
THIS WEEK BRINGING DRY CONDITIONS AND A GRADUAL WARMUP THROUGH
THIS COMING WEEKEND. LOW TEMPERATURES FOR THE NEXT COUPLE OF
NIGHTS WILL FALL INTO THE 30S IN SEVERAL AREAS ALLOWING FOR SOME
FROST TO DEVELOP.

&&

.DISCUSSION...DRY NORTH AND NORTHEASTERLY FLOW CONTINUES ACROSS
THE REGION. EXPECTING A MASS OF EVEN DRIER AIR TO ALSO MOVE IN
FROM THE EAST TONIGHT THUS DEWPOINTS SHOULD CONTINUE TO DECREASE
TONIGHT ALLOWING FOR BETTER RADIATIONAL COOLING. THUS...FROST
ADVISORIES HAVE BEEN ISSUED FOR COASTAL AREAS AND A FREEZE WARNING
IS NOW IN EFFECT FOR THE INTERIOR VALLEYS OF MENDOCINO CO. ALL
MODEL GUIDANCE INDICATES THAT A RIDGE OF HIGH PRESSURE WILL
CONTINUE TO BUILD OVER THE WEST COAST INTO THIS WEEKEND BRINGING
WARMER TEMPERATURES AND DRY CONDITIONS. AFTERNOON HIGH
TEMPERATURES WILL CLIMB INTO THE 70S IN MENDOCINO COUNTY BY LATE
WEEK AND POSSIBLY REACH INTO THE UPPER 70S OVER THE WEEKEND.
ELSEWHERE HIGH TEMPERATURES WILL REMAIN PRIMARILY IN THE 60S WITH
A FEW UPPER 50S ALONG THE IMMEDIATE COAST. HIGH RESOLUTION MODEL
GUIDANCE INDICATES THAT STRATUS MAY REDEVELOP OFF THE COAST
THURSDAY INTO FRIDAY BRINGING THE POTENTIAL FOR LOW CLOUDS AND FOG
FOR COASTAL AREAS. CLOUD COVER HAS BEEN INCREASED WITH THIS UPDATE
THURSDAY THROUGH FRIDAY MORNING ACROSS COASTAL LOCATIONS. THERE IS
SOME HINT OF LIGHT OFFSHORE FLOW WHICH WILL LIKELY KEEP THE
STRATUS FROM PENETRATING TOO FAR UP COASTAL VALLEYS. LONG TERM
MODELS ARE NOW IN BETTER AGREEMENT ON BRINGING BACK A COOLER AND WETTER
PATTERN TO THE REGION BEGINNING WEDNESDAY OF NEXT WEEK. /RPA/JT



&&

.AVIATION...OTHER THAN SOME VERY LOCALIZED EARLY MORNING INTERIOR VALLEY
FOG...ALL AREAS INCLUDING THE COAST SHOULD REMAIN VFR THROUGH THE
NEXT TAF CYCLE.


&&

.MARINE...WHILE WINDS HAVE DIMINISHED SLIGHTLY COMPARED TO 
YESTERDAY...ESPECIALLY ACROSS THE INNER WATERS...STEEP SHORT PERIOD 
SEAS HAVE HOVERED AT 8 TO 10 FEET AT 8 TO 9 SECONDS AT OFFSHORE 
BUOYS THIS AFTERNOON.  WHILE THE TREND HAS BEEN GRADUALLY DOWNWARD 
TO THIS POINT...SATELLITE IMAGERY CONFIRMS THAT A SUBTLE SHORTWAVE 
IS IN THE PROCESS OF MOVING ACROSS THE REGION NOW.  MODEL GUIDANCE 
HAS PERSISTENTLY INDICATED THAT THIS WAVE WILL HELP TO TIGHTEN THE 
PRESSURE GRADIENT SLIGHTLY AS IT PASSES...WHICH SHOULD BOOST WIND 
SPEEDS UP A NOTCH THIS EVENING AND OVERNIGHT.  WHILE WIDESPREAD 
GALES ARE NOT EXPECTED...SEAS ARE EXPECTED TO RAMP UP DURING THIS 
PERIOD...PARTICULARLY ACROSS THE OUTER WATERS.  WAVE MODEL 
PREDICTIONS CONTINUE TO INDICATE SEAS BUIDLING TO 10 FEET AT 8 
SECONDS ACROSS MUCH OF THE OUTER WATERS...AND AS A RESULT...A 
HAZARDOUS SEAS WARNING WILL GO INTO EFFECT FOR THE OUTER WATERS AT 2 
PM AND LAST UNTIL 1 AM...IN ADDITION TO SMALL CRAFT ADVISORIES FOR 
THE INNER WATERS FOR THE SAME TIME PERIOD.  

ELEVATED SHORT PERIOD SEAS WILL LIKELY CONTINUE THROUGH WEDNESDAY 
ACROSS THE OUTER WATERS...AS FRESH WINDS WILL PERSIST UNTIL LATE IN 
THE DAY.  AS SUCH...SMALL CRAFT ADVISORIES WILL REMAIN IN EFFECT 
FROM NOW UNTIL 3 PM TOMORROW IN THE SOUTHERN OUTER WATERS...AND 
UNTIL 9 PM IN THE NORTHERN OUTER WATERS.  BEYOND TOMORROW...WINDS 
WILL FINALLY DIMINISH TO BELOW SMALL CRAFT ADVISORY LEVELS AS THE 
PRESSURE GRADIENT RELAXES.  A BUILDING WESTERLY SWELL WILL THEN 
BECOME THE DOMINANT WAVE GROUP AS IT ENTERS THE WATERS SOMETIME LATE 
WEDNESDAY.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     FROST ADVISORY FROM 1 AM TO 7 AM PST WEDNESDAY FOR CAZ001-002.

     FREEZE WARNING FROM 1 AM TO 8 AM PST WEDNESDAY FOR CAZ076.

NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL 1 AM PST WEDNESDAY FOR PZZ450-455.

     SMALL CRAFT ADVISORY UNTIL 9 PM PST WEDNESDAY FOR PZZ470.

     HAZARDOUS SEAS WARNING UNTIL 1 AM PST WEDNESDAY FOR PZZ470-475.

     SMALL CRAFT ADVISORY UNTIL 3 PM PST WEDNESDAY FOR PZZ475.

&&

$$

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