Snow Advisory 7, NWS Eureka, CA

000 
WWUS46 KEKA 291014
WSWEKA

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
214 AM PST TUE JAN 29 2008

CAZ003-004-292315-
/O.CON.KEKA.SN.Y.0007.080129T1500Z-080130T0300Z/
NORTH COAST INTERIOR-UPPER TRINITY RIVER-
214 AM PST TUE JAN 29 2008

...SNOW ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM
PST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM
PST THIS EVENING. 

ANOTHER COLD PACIFIC STORM BRING ANOTHER ROUND OF SNOW TO
ELEVATIONS ABOVE 1500 FEET BEGINNING LATER THIS MORNING.
ACCUMULATION OF 2 TO 4 INCHES IS EXPECTED ABOVE 2000 FEET WHILE 5
TO 7 INCHES IS LIKELY ABOVE 3000 FEET. LOCALLY SNOW MAY FALL AS
LOW AS 1200 FEET...HOWEVER LITTLE TO NO ACCUMULATION IS EXPECTED.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW PRIMARILY WILL CAUSE
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS46 KEKA 291451
WSWEKA

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
651 AM PST TUE JAN 29 2008

CAZ076-300300-
/O.EXA.KEKA.SN.Y.0007.080129T1500Z-080130T0300Z/
MENDOCINO INTERIOR-
651 AM PST TUE JAN 29 2008

...SNOW ADVISORY IN EFFECT UNTIL 7 PM PST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 7 PM PST THIS EVENING. 

ANOTHER COLD PACIFIC STORM WILL BRING ANOTHER ROUND OF SNOW TO
ELEVATIONS ABOVE 1500 FEET BEGINNING THIS MORNING. ACCUMULATION
OF 2 TO 4 INCHES IS EXPECTED BETWEEN 2000 AND 3000 FEET...WITH
HIGHER AMOUNTS POSSIBLE ABOVE 3000 FEET. SNOW MAY FALL AS LOW AS
500 FEET...HOWEVER LITTLE TO NO ACCUMULATION IS EXPECTED.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL
DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

CAZ003-004-300300-
/O.CON.KEKA.SN.Y.0007.080129T1500Z-080130T0300Z/
NORTH COAST INTERIOR-UPPER TRINITY RIVER-
651 AM PST TUE JAN 29 2008

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING...

ANOTHER COLD PACIFIC STORM WILL BRING ANOTHER ROUND OF SNOW TO
ELEVATIONS ABOVE 1500 FEET BEGINNING LATER THIS MORNING.
ACCUMULATION OF 2 TO 4 INCHES IS EXPECTED ABOVE 2000 FEET WHILE 5
TO 7 INCHES IS LIKELY ABOVE 3000 FEET. LOCALLY SNOW MAY FALL AS
LOW AS 500 FEET...HOWEVER LITTLE TO NO ACCUMULATION IS EXPECTED.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL
DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS46 KEKA 291639
WSWEKA

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
839 AM PST TUE JAN 29 2008

CAZ003-004-076-292300-
/O.CON.KEKA.SN.Y.0007.000000T0000Z-080130T0300Z/
NORTH COAST INTERIOR-UPPER TRINITY RIVER-MENDOCINO INTERIOR-
839 AM PST TUE JAN 29 2008

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING...

SNOW WILL FALL AS LOW 500 FEET ACROSS THE AREA. ROADWAYS WILL
REMAIN HAZARDOUS THROUGH MUCH OF THE DAY. PORTIONS OF HIGHWAY 101
WILL LIKELY EXPERIENCE BURSTS OF HEAVY SNOW AND OCCASIONAL
CLOSURES AT HIGHER ELEVATIONS...ESPECIALLY NORTH OF ORICK AND
SOUTH OF GARBERVILLE. INLAND ROADWAYS WILL REMAIN SNOW COVERED
MUCH OF THE DAY AND TRAVEL IS DISCOURAGED. 

ADDITIONAL SNOW AMOUNTS OF 1 TO 3 INCHES CAN BE EXPECTED BELOW
1500 FEET....WITH 3 INCHES OF ADDITIONAL SNOW ABOVE 1500 FEET.
SHOWERS OF SNOW WILL BECOME SCATTERED LATER TODAY AS THE COLD
UPPER SYSTEM BEGINS TO PUSH EAST OF THE AREA. 

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL
DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING. BRING CHAINS.

$$

000 
WWUS46 KEKA 292203
WSWEKA

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
203 PM PST TUE JAN 29 2008

CAZ003-004-076-292315-
/O.CAN.KEKA.SN.Y.0007.000000T0000Z-080130T0300Z/
NORTH COAST INTERIOR-UPPER TRINITY RIVER-MENDOCINO INTERIOR-
203 PM PST TUE JAN 29 2008

...SNOW ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS CANCELLED THE SNOW
ADVISORY. 

SCATTERED SNOW SHOWERS CAN BE EXPECTED ACROSS NORTHWEST CALIFORNIA
THROUGH TONIGHT HOWEVER LITTLE TO NO ACCUMULATION IS ANTICIPATED.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
515 AM PST MON JAN 28 2008

.SYNOPSIS...A SERIES OF COLD STORM SYSTEMS ORIGINATING FROM
THE GULF OF ALASKA WILL BRING OCCASIONAL RAIN AND SNOW TO
NORTHWESTERN CALIFORNIA THROUGH FRIDAY AND PERHAPS ON SATURDAY.

&&

.DISCUSSION...SERIES OF COLD STORMS ORIGINATING FROM THE GULF
OF ALASKA WILL AFFECT NORTHWEST CALIFORNIA THROUGH THE WEEK.
GFS AND NAM12 TIMING HAS ONE STORM AFFECTING NW CA WITH PRECIP
ABOUT EVERY OTHER DAY.

THE FRONT THAT HIT YESTERDAY PRODUCED SCATTERED SNOW ACCUMULATIONS
ALONG THE NORTH COAST. SINCE SUNDAY EVENING THERE HAVE BEEN NO NEW
REPORTS OF SNOW ALONG THE COAST. HOWEVER...SMALL HAIL HAS OCCURRED
WITH SOME THE INTENSE SHOWERS. THE HAIL MAY ACCUMULATE ON ROADS AND
CREATE HAZARDOUS DRIVING CONDITIONS THIS MORNING. THUS HAVE EXTENDED
THE SNOW ADVISORY FOR THE COAST UNTIL 900 AM PST. VORT MAX OVER THE
AREA EARLY THIS MORNING TRIGGERING THE CONVECTION WILL PASS TO THE
EAST LATER THIS MORNING AND THE SHOWER INTENSITY SHOULD DECREASE.

A SECOND STORM IS EXPECTED ON TUESDAY...BUT SNOW LEVELS SHOULD BE
SLIGHTLY HIGHER WITH THIS ONE. NAM12 AND GFS WERE IN GOOD AGREEMENT
ON THE TIMING...BRINGING RAIN INTO DEL NORTE COUNTY AFTER MIDNIGHT
TONIGHT...SPREADING IT SOUTHWARD THROUGH THE DAY ON TUESDAY. BASED
ON 850 MB TEMPERATURES OF -5C...SNOW AS LOW AS 1500 FEET WILL BE
POSSIBLE...BUT IS MORE LIKELY ABOVE 2000-2500 FEET. FOR NOW WILL
INDICATE A RANGE OF 1500 TO 2500 FEET DUE TO THE UNCERTAINTY. A
SNOW ADVISORY OR HEAVY SNOW WARNING WILL LIKELY BE NEEDED. IT IS
A BIT OF STRETCH FOR A WARNING...AND WILL DEPEND ON HOW HIGH SNOW
LEVELS INCREASE. FOR NOW WILL HOLD OFF ON ISSUING A NEW ADVISORY.

GFS AND NAM12 ARE SLIGHTLY OUT OF SYNC ON THE NEXT STORM EXPECTED
ON THURSDAY. GFS WAS WETTER AND SLIGHTLY FASTER WITH PRECIP
SPREADING OVER THE NORTHERN 1/3RD WED NIGHT. GFS ENSEMBLE MEMBERS
AND ECMWF SUPPORT THE OPERATIONAL GFS TIMING. FOR NOW WILL INCREASE
PRECIP CHANCES SLIGHTLY WED NIGHT AND THU. SNOW LEVELS SHOULD BE
FAIRLY LOW WITH THIS STORM AS WELL. THE UNCERTAINTY IS EVEN GREATER
WITH THIS ONE. ONCE AGAIN WILL BE USING 850MB TEMPERATURES AS A FIRST
APPROXIMATION.

A 4TH SYSTEM MAY BRING MORE RAIN AND SNOW ON SATURDAY. AFTER SATURDAY
SOLUTIONS INDICATE A BIG BROAD RIDGE BUILDING UP OVER THE NE PAC AND
INTO THE GULF OF AK. RIDGE BUILD UP SEEMS A BIT OVERDONE. IT MAY END
UP BEING FLAT...WITH MOIST WESTERLY FLOW SPILLING OVER THE TOP. DJB

&&

.AVIATION...MAINLY MVFR CONDITIONS WILL PREVAIL THIS AM WITH ISOLD
IFR IN SHOWERS. SHOWERS WILL TAPER OFF LATE AM/EARLY PM WITH
GENERALLY VFR CONDITIONS PREVAILING INTO THIS EVENING. MVFR CIGS
WILL RETURN LATE TONIGHT AS WINDS VEER TO THE S TO SW AHEAD OF THE
NEXT FRONT. BC

&&

.MARINE...BUOY OBS REPORT SEAS BUILDING TO AROUND 12 FT THIS AM AS
NW SWELL ENTERS THE WATERS. THIS TREND WILL CONTINUE TODAY PEAKING
NEAR 16 FT THIS AFTERNOON. ADVISORY LEVEL WINDS WILL DECREASE BY
THIS AFTERNOON THEN VEER TO THE S TO SW TONIGHT. SOUTHERLY WINDS
WILL INCREASE LATE TONIGHT AS ANOTHER COLD FRONT APPROACHES THE
REGION. MODEL GUIDANCE SHOWS 25 TO 30 KT OVER NRN ZONES AND HAVE
ISSUED GALE WARNING BEGINNING LATE TONIGHT. FRONT WILL PUSH THROUGH
WATERS BY TUE PM WITH NW WINDS GUSTING TO GALE IN ITS WAKE. WINDS
WILL GRADUALLY SUBSIDE THROUGH WED AM AND WILL VEER TO THE S TO SW
WED NIGHT AS ANOTHER SYSTEM APPROACHES FROM THE NW. MODEL GUIDANCE
CONTINUES TO FORECAST A VERY LARGE NW SWELL TO PROPAGATE THROUGH THE
WATERS ON FRIDAY WITH SWAN PEAKING AT 24 FT AND THE ENP AT 27 FT.
THE MODELS TEND TO OVER FORECAST SWELL 5 DAYS OUT SO WILL CONTINUE
TO UNDERCUT GUIDANCE BY 3 TO 5 FEET. BC

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
SNOW ADVISORY IN EFFECT UNTIL 9 AM PST THIS MORNING FOR DEL
NORTE...HUMBOLDT AND TRINITY COUNTIES.

HAZARDOUS SEAS WARNING THROUGH 6 PM PST TODAY FROM PT ST GEORGE TO
PT ARENA OUT 60 NM.

SMALL CRAFT ADVISORY FOR WINDS THROUGH 4 PM PST THIS AFTERNOON FROM
PT ST GEORGE TO PT ARENA OUT 60 NM.

GALE WARNING FROM 3 AM TUESDAY TO 4 AM PST WEDNESDAY FROM PT ST
GEORGE TO CAPE MENDOCINO OUT TO 60 NM.

GALE WARNING FROM 6 AM TO 8 PM TUESDAY FROM CAPE MENDOCINO TO PT
ARENA OUT TO 60 NM.

&&

VISIT US AT HTTP://WWW.WEATHER.GOV/EUREKA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
601 AM PST MON JAN 28 2008

CAZ001-003-004-291415-
REDWOOD COAST-NORTH COAST INTERIOR-UPPER TRINITY RIVER-
601 AM PST MON JAN 28 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

A SNOW ADVISORY IS IN EFFECT UNTIL 9 AM PST TODAY. SEE SFOWSWEKA
OR WMO PRODUCT WWUS46 KEKA FOR MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ANOTHER COLD STORM WILL BRING A THREAT OF SNOW ON TUESDAY.
5 TO 7 INCHES OF NEW SNOW MAY ACCUMULATE BETWEEN 2000 TO 3000
FEET BY TUESDAY EVENING WITH THIS STORM. A SNOW ADVISORY MAY
BE NECESSARY ON TUESDAY THROUGH TUESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT
SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE IN EUREKA.