851
FXUS66 KEKA 091141
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
341 AM PST TUE FEB 9 2010
SYNOPSIS
SHOWERS WILL COME TO AN END THIS MORNING AS HIGH
PRESSURE BUILDS OVER THE REGION. MORE PRECIPITATION IS EXPECTED
THURSDAY INTO FRIDAY AS ANOTHER FRONT PUSHES ASHORE.
DISCUSSION
WATER VAPOR IMAGERY CLEARLY SHOWS LOW PRESSURE JUST
OFF THE CALIFORNIA COAST. RADAR SHOWS SCATTERED SHOWERS MOSTLY
SOUTH OF CAPE MENDOCINO AT THIS TIME. THIS IS A LITTLE FURTHER TO
THE WEST THAN EXPECTED. HOWEVER, THE BENEFITS ARE LESS
PRECIPITATION AND SNOW LEVELS ABOUT 1000 FT HIGHER SINCE THE LARGE
AREA OF COLD AIR IS MOSTLY OFFSHORE. THUNDERSTORM ACTIVITY IS
MINIMAL, BUT LEFT MENTION OF IT IN THE SOUTHERN WATERS FORECAST
FOR THE MORNING HOURS SINCE MODELS STILL SHOW SOME INSTABILITY.
THE LOW AND ITS PRECIPITATION WILL CONTINUE TO MOVE TO THE SOUTH
TODAY. SHOWERS WILL DIMINISH BY THE AFTERNOON AS A WEAK RIDGE OF
HIGH PRESSURE BUILDS OVER THE AREA. DRY WEATHER IS EXPECTED
TONIGHT THROUGH WEDNESDAY NIGHT. MORE RAIN WILL THREATEN THE AREA
IN ADVANCE OF THE NEXT FRONT. THE MAIN THREAT OF PRECIPITATION
WILL BEGIN LATE WEDNESDAY NIGHT. THE HIGHEST POPS WILL BE NEAR THE
CA/OR BORDER AND GRADUALLY DECLINE FURTHER SOUTH. HOWEVER, RAIN
WILL OVERSPREAD THE ENTIRE AREA THURSDAY INTO FRIDAY AS THE FRONT
MOVES ONSHORE. STROZ
AVIATION
AN APPROACHING TROUGH ALOFT WILL CONTINUE TO GENERATE
WEAK INSTABILITY AND SCATTERED SHOWERS THROUGH 11 AM PST. SHOWER
ACTIVITY WILL DIMINISH THIS AFTERNOON AND EVENING AS THE LOW MOVES
SOUTHWARD AWAY FROM THE AREA. LOW CEILINGS AND ISOLATED VSBY
RESTRICTIONS IN BR AND SHRA SHOULD IMPROVE THIS AFTERNOON. DJB
MARINE
HIGH PRES OVER THE E PAC WILL CONTINUE TO PRODUCE LIGHT
TO MODERATE NORTHERLY WINDS THROUGH TONIGHT. A WEAK LOW WILL
APPROACH ON WED AND BRING A THREAT OF GALE FORCE WINDS ON THU.
LARGE WESTERLY SWELL GENERATED FROM THIS STORM WILL BUILD ON FRI
AND REMAIN HIGH THROUGH SAT. DJB
EKA WATCHES/WARNINGS/ADVISORIES
NONE.
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