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AREA FORECAST DISCUSSION

 
 FXUS66 KEKA 222209 CCA
 AFDEKA
 
 AREA FORECAST DISCUSSION...CORRECTED
 NATIONAL WEATHER SERVICE EUREKA CA
 208 PM PST SUN NOV 22 2009
 
 .SYNOPSIS...ISOLATED SHOWERS WILL CONTINUE TO DIMINISH THIS EVENING 
 AS HIGH PRESSURE BUILDS INTO THE REGION. WARMER AND DRY WEATHER WILL 
 PREVAIL THROUGH THE MIDDLE OF THE WEEK BEFORE ANOTHER STORM BRINGS A 
 CHANCE OF PRECIPITATION TO THE REGION. 
 &&
 
 .DISCUSSION...VISIBLE SATELLITE IMAGES SHOW SCATTERED CUMULUS CLOUDS 
 ACROSS THE CWA...MAINLY OVER THE NORTHERN PORTIONS AND MOUNTAINS. 
 ISOLATED SHOWERS CONTINUE TO PRODUCE BRIEF AS NOTED BY OBSERVATIONS 
 OF A FEW HUNDREDTHS IN THE PAST HOUR FROM VARIOUS RAWS STATIONS SUCH 
 AS BONANZA KING...FRIEND MOUNTAIN AND BIG HILL. EXPECT A DIMINISHING 
 TREND THROUGH THE AFTERNOON AND EVENING...WITH MOST OF THE NIGHT 
 FAIRLY CLEAR ACROSS THE CWA. SOME PATCHY FOG FORMATION IS EXPECTED 
 OVER INLAND VALLEYS AND SHELTERED LOCATIONS DUE TO WET GROUND 
 SURFACES AND RADIATIONAL COOLING. LIGHT OFFSHORE FLOW DEVELOPING 
 OVERNIGHT WILL PREVENT ANY SORT OF MARINE FOG FORMATION. 
 
 MODELS CONTINUE TO SHOW UPPER RIDGE BUILDING INTO THE E PAC 
 TONIGHT...AND WEAKENING AS A SHORT WAVE TROUGH RACES ACROSS 
 VANCOUVER ISLAND. A BAND OF MOISTURE ASSOCIATED WITH THIS FEATURE 
 MAY BRING SOME CLOUDINESS TO THE FAR NORTHERN CWA...BUT NO RAINFALL 
 IS EXPECTED. THE E PAC RIDGE WILL REBUILD TUESDAY AND THEN PUSH 
 INLAND FROM THE WEST COAST AS ANOTHER DEEP LOW MOVES INTO THE GULF 
 OF ALASKA. THE NEXT CHANCE OF PRECIPITATION APPEARS LATE IN THE WEEK 
 AS THE UPPER TROUGH AND COLD FRONT SWING TOWARD THE WEST COAST. 
 GUIDANCE CONTINUES TO DIVERGE IN REGARD TO THE STRENGTH AND TIMING 
 OF THIS FEATURE...BUT THE OVERALL TREND HAS BEEN TO BRING RAIN TO 
 THE AREA THURSDAY INTO FRIDAY. MAINTAINED CHC POPS ACROSS THE AREA 
 THURSDAY INTO FRIDAY WITH IMPROVING CONDITIONS OVER THE WEEKEND AS 
 ANOTHER RIDGE BUILDS OVER THE E PAC. CMC 
 &&
 
 .MARINE...LATEST ENP/WCWAVE10 SHOWING COMBINED SEAS HEIGHT MAX OF 
 AROUND 16 FT WITH 11 TO 12 SECOND PERIODS FOR THIS AFTERNOON ACROSS 
 THE NORTHERN ZONE WATERS. CURRENT AFTERNOON BUOY OBS SHOW HEIGHTS  
 THAT HIGH BUT LONGER PERIODS WITH 16 FT AT 14 TO 13 SECONDS REPORTED 
 AT BUOYS 27 AND 22 RESPECTIVELY. HAZARDOUS SEAS WILL SLOWLY SUBSIDE 
 THIS EVENING THROUGH TONIGHT AS THE PERSISTENT WESTERLY SWELL 
 DIMINISHES. A LONGER PERIOD MODERATE SWELL WILL BUILD INTO THE 
 REGION STARTING TOMORROW PER LATEST HANSON PLOTS/SWAN DATA. HENRY
 
 .AVIATION...ISOLD TO SCT AFTERNOON INSTABILITY SHOWERS WILL DIMINISH 
 WITH LOSS OF DAYTIME HEATING. VFR CONDITIONS ARE EXPECTED TO PREVAIL 
 THROUGH THE REMAINDER TAF PERIOD WITH HIGH PRESSURE AXIS...DRIER 
 AIRMASS...AND OFFSHORE FLOW IN PLACE THROUGH TONIGHT. THE EXCEPTION 
 WILL BE PATCHY RADIATIONAL FOG/BR...INCLUDING AT THE KUKI TAF SITE. 
 HENRY  
 
 &&
 
 NORTHWEST CALIFORNIA COASTAL WATERS...
 
      HAZARDOUS SEAS WARNING UNTIL 4 AM PST MONDAY FOR PZZ450-470.
 
      SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 4 AM PST MONDAY 
      FOR PZZ455-475.
 
  
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