Special Marine Warning 2, NWS Eureka, CA

NORTHWEST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
245 PM PST THU MAR 13 2003

DEEP UPPER LOW IN THE GULF OF ALASKA AND NE PAC WILL REMAIN NEARLY
STATIONARY THROUGH THE SHORT TERM...WITH A SERIES OF IMPULSES TO
MOVE THROUGH THE NE PAC AND CROSS THE WEST COAST. THE FIRST WAVE
WILL CROSS THE N CALIF COAST THIS EVENING ACCOMPANIED BY A COLD
FRONT AND GUSTY WINDS. ADVISORY LEVEL WINDS WILL CONTINUING THROUGH
THE EVENING UNTIL AROUND MIDNIGHT. THE MODELS SHOW SURFACE BASED
INSTABILITY OVER THE COASTAL WATERS AND EXTENDING INLAND OVER THE
REDWOOD AND MENDOCINO COAST ZONES THIS EVENING...ESPECIALLY SOUTH OF
CAPE MENDOCINO. WINDS SHOULD BEGIN TO DIMINISH BY LATE EVENING AND
SO WILL LET WIND ADVISORY EXPIRE BY MIDNIGHT. COOL AIR WILL MOVE
INTO THE CWA LATE TONIGHT...WITH 7H TEMPS DROPPING TO NEAR -7 DEG C
BY 12Z. HAVE FORECAST 2 TO 3 INCHES OF SNOW OVER THE TRINITY
MOUNTAINS ABOVE 5000 FT...AS WARM AIR MASS AT LOW LEVELS SHOULD
PREVENT MUCH SNOW ACCUMULATION BELOW THE 5500 FT LEVEL.

EARLY FRIDAY WARM AIR ADVECTION WILL RESUME OVER NORTHWEST
CALIF...SO THAT SNOW LEVELS WILL RISE ABOVE 5000 FT BY AFTERNOON AND
LIMIT ANY ADDITIONAL ACCUMULATIONS. NEXT STRONGER UPPER WAVE WILL
APPROACH THE WEST COAST FRI EVENING. A STRONG UPPER JET ORIENTED E-W
ALONG 32 N WILL BUILD TOWARD THE COAST...PROVIDING A BROAD AREA OF
UPPER LEVEL DIVERGENCE IN THE LEFT FRONT QUAD REGION. WINDS WILL
INCREASE SHARPLY LATE FRI AFTERNOON AND EVENING...WITH WARNING LEVEL
WIND SPEEDS LIKELY IN ZONES 1...2 AND 3 FRI NIGHT INTO EARLY SAT.
THE ASSOCIATED COLD FRONT WILL CROSS N CALIF AFTER 06Z SAT...WITH A
COLDER AIR MASS ALLOWING SNOW LEVELS TO DROP TO NEAR 4000 FT
SATURDAY. AS THE FRONT MOVES SOUTHEAST AWAY FROM CWA WINDS WILL
DECREASE BELOW WARNING LEVELS SAT MORNING. A FINAL WEAK WAVE WILL
CROSS THE CA COAST SAT NIGHT INTO SUN...STARTING A TRANSITION TO A
SHOWERY REGIME AS A MOIST ZONAL FLOW WILL DOMINATE THE E PAC NEAR
40N SUN THROUGH MON.

FOR THE EXTENDED...MODELS SOLUTIONS DIVERGE IN TIMING OF THE
SUCCESSION OF UPPER WAVES TO CROSS THE WEST COAST...ALTHOUGH BOTH
GFS AND EC INDICATE A CONTINUED ACTIVE PATTERN ACROSS THE REGION.
WILL KEEP A BROADBRUSH PATTERN OF CHANCE TO LIKELY POPS OVER THE CWA
THROUGH DAY 7.  CILIBERTI.

POPS CEC/ACV/EKA UKI 968

.EKA...WIND ADVISORY DEL NORTE AND HUMBOLDT COUNTIES...AND THE
MENDOCINO COAST THROUGH MIDNIGHT.
    ...HIGH WIND WATCH FOR DEL NORTE AND HUMBOLDT COUNTIES FOR
    FRIDAY NIGHT.
    ...GALE WARNING PT ST GEORGE TO PT ARENA OUT 60NM.
    ...HIGH SURF ADVISORY REDWOOD AND MENDOCINO COAST.

CAZ001>004-076-141330-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
530 AM PST THU MAR 13 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA

.DAY ONE...TODAY

THE FIRST IN A SERIES OF STRONG PACIFIC STORMS WILL MOVE INLAND
TODAY...BRINGING STRONG AND GUSTY SOUTH WINDS TO THE COAST AND THE
COASTAL RANGES THIS MORNING. SEE SFONPWEKA FOR MORE DETAILS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ANOTHER STRONG STORM DEVELOPING OVER THE CENTRAL PACIFIC WILL
GENERATE LARGE WEST SWELL TODAY THROUGH TONIGHT. EXPECT THE SWELL TO
REACH NORTHWEST CALIFORNIA WATERS FRIDAY AND FRIDAY NIGHT. SEE
SFOMWSEKA FOR MORE DETAILS.

IN ADDITION...THIS DEVELOPING STORM WILL BRING ANOTHER ROUND OF
STRONG AND GUSTY WINDS ALONG WITH THE POTENTIAL FOR HEAVY RAINFALL
FRIDAY NIGHT THROUGH SATURDAY MORNING. SEE SFONPWEKA FOR MORE
DETAILS.

.INSTRUCTIONS TO SPOTTERS...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.