Snow Advisory 3, NWS Eureka, CA

000 
WWUS46 KEKA 011130
WSWEKA

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
330 AM PST THU DEC 1 2005

CAZ004-011930-
/O.UPG.KEKA.SN.Y.0003.000000T0000Z-051202T0000Z/
/O.EXT.KEKA.WS.W.0002.000000T0000Z-051201T2000Z/
UPPER TRINITY RIVER-
330 AM PST THU DEC 1 2005

...WINTER STORM WARNING NOW IN EFFECT UNTIL NOON PST TODAY ABOVE
5000 FEET...

THE WINTER STORM WARNING ABOVE 5000 FEET IS NOW IN EFFECT UNTIL
NOON PST TODAY. THE SNOW ADVISORY IS NO LONGER IN EFFECT.

A STRONG STORM SYSTEM WILL CONTINUE TO BRING HIGH ELEVATION
SNOWFALL THROUGH NOON TODAY. SNOW LEVELS WILL CONTINUE TO RISE
THIS MORNING...AND WILL BE ABOVE 5000 TO 5500 FEET BY NOON TODAY. 
SNOW MIXED WITH RAIN OR SLUSH MAY FALL AS LOW AS 3500 FEET IN
COLDER VALLEYS AND CANYONS IN CENTRAL AND EASTERN TRINITY THIS
MORNING. LITTLE IF ANY ACCUMULATION IS EXPECTED.

ADDITIONAL SNOW ACCUMULATIONS ABOVE 5000 TO 5500 FEET WILL RANGE
FROM 6 TO 8 INCHES TODAY. SNOW AND RAIN WILL TAPER OFF RAPIDLY 
THIS EVENING.

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...
SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO
POSSIBLE.  THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

$$


DJB

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
345 PM PST WED NOV 30 2005

.SYNOPSIS...A STRONG STORM SYSTEM APPROACHING NORTHWEST CALIFORNIA
TONIGHT WILL BRING STRONG WINDS...AND PERIODIC HEAVY RAIN AND SNOW
THROUGH THURSDAY.

&&

.DISCUSSION...A STRONG STORM SYSTEM OFF THE NORTHWEST CALIFORNIA
COAST WILL CONTINUE TO PROGRESS NORTHEAST THROUGH THURSDAY. THE
INITIAL PRECIP FIELD IS ALREADY ONSHORE AS OF 21Z...WITH LIGHT RAIN
REPORTED ALONG THE COAST AND INTERIOR LOCATIONS. MODELS REMAIN
CONSISTENT WITH A WET AND WINDY PATTERN LATER TONIGHT AND THURSDAY.
MODEL WIND FIELDS NOW SHOWING STRONGER WINDS ALONG THE REDWOOD COAST
TONIGHT RESULTING IN AN UPGRADE OF THE WIND ADVISORY TO A HIGH WIND
WARNING. STRONG WAA/ISENTROPIC LIFT COUPLED WITH HIGH PW MOISTURE
PLUME WILL PUSH INTO NORTHWEST CALIFORNIA TONIGHT INTO THURSDAY
MORNING. MUCH OF THE PRECIP WILL FALL AS RAIN THROUGH MOST OF THE
ZONES WITH SNOW LEVELS INITIALLY AROUND 3000 FEET...INCREASING TO
ABOVE 4500 FEET AFTER MIDNIGHT. THE EXCEPTION WILL BE ZONE 4. AS OF
21Z...MOST RAWS SITES ARE REPORTING TEMPERATURES NEAR OR BELOW
FREEZING...INDICATING THE SNOW LEVEL LINGERING NEAR 3000 FEET.
SLIGHT COOLING OVERNIGHT WITH ALREADY COLD AIR TRAPPED IN THE REGION
WILL PRODUCE MUCH LOWER SNOW LEVELS THAT WILL REMAIN THROUGH THE
NIGHT. THEREFORE...HAVE UPGRADED WINTER STORM WATCH FOR UPPER
TRINITY TO A WARNING. THE COLD FRONT WILL MOVE THROUGH THE REGION BY
THURSDAY AFTERNOON...WITH LINGERING SHOWERS AND SNOW SHOWERS THOUGH
FRIDAY. THE STRONG COLD PUSH WILL LOWER SNOW LEVELS AS LOW AS 2000
FEET EARLY FRIDAY MORNING. A SNOW ADVISORY FOR ACCUMULATIONS UP TO 6
INCHES NOT OUT OF THE QUESTION FOR THURSDAY NIGHT IN THE NORTH COAST
INTERIOR AND UPPER TRINITY ZONES.

FRI THROUGH TUE...COOLER AIR MASS WILL SETTLE OVER THE DISTRICT FRI
AND SAT. NORTHWESTERLY JET WITH EMBEDDED IMPULSES WILL BRING
PERIODIC PRECIPITATION...PRIMARILY TO ZONES 1 AND 3. 0Z/6Z GFS
SOLUTIONS HAS SUNDAY THROUGH TUESDAY DRY...BUILDING UP A RIDGE
AGAIN...AGREEING WITH GSM RUN. A GENERIC NON-DESCRIPT SLIGHT CHANCE
OF PRECIP WILL SUFFICE SUN THROUGH WED. KLEESCHULTE

&&

.AVIATION...30/18Z TAF CYCLE TO CARRY VFR CIGS/VSBYS W/SCT -SHRA IN
WARM SECTOR OF UPPER SYSTEM APCHG FROM THE SW TIL 01/08Z. SFC
CYCLOGENESIS AND SFC LOW FORECASTED WITH 997MB PRES MIN JUST WEST OF
CEC 01/12Z. ESE-TO-SSE WINDS TO ACCELERATE/INTENSIFY ALONG SFC
BOUNDARY THRU 01/18Z WITH WDSPRD G40KT+...1-2SM +RA...MVFR CIGS. MJV

&&

.EKA...WATCHES/WARNINGS/ADVISORIES
...WINTER STORM WARNING UPPER TRINITY RIVER.
...HIGH WIND WARNING REDWOOD COAST AND NORTH COAST INTERIOR.
...WIND ADVISORY MENDOCINO COAST.
...GALE WARNING PT ST GEORGE TO PT ARENA OUT 60NM.
...HAZARDOUS SEAS WARNING PT ST GEORGE TO PT ARENA OUT 60NM.

&&

VISIT US AT WWW.WEATHER.GOV/EUREKA