Winter Weather Advisory 3, NWS Eureka, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
617 PM PST MON DEC 15 2014

.SYNOPSIS...A COOL MOIST PATTERN WILL PERSIST THROUGH FRIDAY AS A
SERIES OF WEATHER SYSTEMS IMPACT THE REGION. SNOW ALONG THE
HIGHEST PASSES WILL CONTINUE INTO THE EARLY MORNING HOURS OF
TUESDAY.

&&

.UPDATE...COLD AIR MOVING IN BEHIND TODAYS FRONT IN ASSOCIATION
WITH CONVECTIVE PRECIP IS CAUSING SNOW LEVELS TO FALL DOWN TO
AROUND 3200 FEET IN AREAS. WITH A FEW INCHES OF SNOW FALLING
ALONG SOUTH FORK MOUNTAIN AND BUCKHORN, CALTRANS HAS ISSUED CHAIN
REQUIREMENTS. WE EXPECT SNOW LEVELS TO CONTINUE FALLING OVERNIGHT,
BUT PRECIP SHOULD BEGIN TO DIMINISH. AT THIS POINT ONLY A FEW
INCHES OF ACCUMULATION ARE EXPECTED ALONG THE PASSES. WITH THIS
FORECAST, IT NECESSITATED A WINTER WEATHER ADVISORY FOR SNOW
TONIGHT. DUE TO LESSENING PRECIP, HAVE ONLY RUN THE ADVISORY
THROUGH 3 AM. THE OVERNIGHT CREW WILL REASSESS THE THREAT AND DROP
OR EXTEND AS NEEDED. BFG

&&

.PREV DISCUSSION......ISSUED AT 424 PM PST...

SYNOPSIS...A COOL MOIST PATTERN WILL PERSIST THROUGH FRIDAY AS A
SERIES OF WEATHER SYSTEMS IMPACT THE REGION.

UPDATE...LOWERED THE SNOW LEVELS THIS EVENING AND TONIGHT AS
OBSERVATIONS ACROSS THE INTERIOR SHOW THE SNOW LEVEL BETWEEN 3500
AND 4000 FT AT THE CURRENT TIME. THE LOWER SNOW LEVELS ARE OVER
TRINITY COUNTY. ALSO RECEIVED A REPORT FROM THE EASTERN SLOPES OF
SOUTH FORK MOUNTAIN ACCUMULATING SNOW AS LOW AS 3500 FEET. WITH A
COOLING AIR MASS STILL COMING IN...THE FORECAST SHOWS A DEEP
DOWNWARD TREND OF SNOW LEVELS OVERNIGHT. HOWEVER...MOISTURE SHOULD
TAPER OVERNIGHT WHICH WILL LIMIT THE AMOUNT OF SNOW THAT ACTUALLY
FALLS. OTHERWISE...THE LAND FORECAST SEEMS TO BE ON TRACK AND NO
OTHER UPDATES WERE NEEDED AT THIS TIME.

ACROSS THE MARINE ENVIRONMENT THERE HAS BEEN SEVERAL SMALL
CONVECTIVE CELL GENERATED ALONG THIS FRONTAL BOUNDARY. SOME OF
THESE CELLS, THROUGH RADAR DATA, HAVE BEEN SHOWING BROAD
ROTATION, SMALL HAIL SIGNATURES, AND LOCALLY GUSTY WINDS. AS SUCH
HAVE ISSUED A MARINE WEATHER STATEMENT TO COVER SOME OF THIS
ACTIVITY. WILL CONTINUE TO WATCH THE RADAR FOR ANY CLEAR
INDICATION OF WATER SPOUTS. BFG

PREV DISCUSSION......ISSUED AT 338 PM PST...

SYNOPSIS...A COOL...CLOUDY AND MOIST PATTERN WILL PERSIST
THROUGH FRIDAY AS A SERIES OF WEATHER SYSTEMS IMPACT THE REGION.

DISCUSSION...LIGHT SHOWERS WILL CONTINUE MOVING THROUGH THE AREA
AT TIMES THIS EVENING AND TONIGHT AS A WEAKENING COLD FRONT MOVES
ACROSS THE REGION. A SERIES OF WEAK COLD FRONTS AND LOW PRESSURE
TROUGHS WILL CONTINUE MOVING ACROSS THE REGION THROUGH FRIDAY.
THEREFORE RAIN SHOWERS WILL MOVE ACROSS THE REGION AT TIMES
THROUGH FRIDAY. THERE WILL BE PERIODS OF LIGHT PRECIPITATION AT
TIMES AND PERIODS OF NO PRECIPITATION AT TIMES THROUGH FRIDAY DUE
TO THE IMPACTS OF THESE SYSTEMS. MOSTLY CLOUDY SKIES WILL PERSIST
THROUGH FRIDAY. A HIGH PRESSURE RIDGE WILL BUILD OVER THE REGION
THIS WEEKEND PRODUCING CLEAR TO PARTLY CLOUDY SKIES AND DRIER
WEATHER. TEMPERATURES WILL REMAIN COOL THROUGH OUT THE WEEK. SNOW
LEVELS WILL GENERALLY REMAIN ABOVE 4000 FEET.

AVIATION...VFR SHOULD PREVAIL THIS EVENING AND TONIGHT IN -SHRA.
PERIODS OF MVFR IS POSSIBLE IN SOME OF THE HEAVIER -SHRA.

MARINE...THE AFTERNOON BUOY OBSERVATIONS SHOW A MODERATE BREEZE
WITH HIGHER GUSTS. WAVE HEIGHTS RANGE FROM 12-15 FT WITH MIXED SEAS,
SHORT PERIOD WIND-DRIVEN WAVES FROM THE SOUTH AND LONGER PERIOD
SWELL FROM THE WEST. THE ASCAT PASS JUST CLIPPED OUR WATERS AND
WASN'T VERY USEFUL. A MODERATE TO FRESH SOUTHERLY BREEZE WILL
PERSIST TONIGHT AS A STORM SYSTEM APPROACHES THE WATERS. SOUTHERLY
WINDS WILL BRIEFLY INCREASE TO NEAR GALE ON TUESDAY. FEEL THAT GUSTS
WILL ONLY MAKE IT TO GALE FORCE FOR A SHORT TIME ON TUESDAY AS THE
MAIN WIND BAND MOVES THROUGH. AS A RESULT, DROPPED THE GL.A'S FOR
THE OUTER WATERS AND WENT WITH HIGH END SC.Y'S. SOUTHERLY WIND WAVES
MAY APPROACH 10 FT TUESDAY AFTERNOON. AGAIN, THIS MAY NOT BE FOR A
LONG ENOUGH TIME PERIOD TO WARRANT A SE.W, SO OPTED TO COVER THIS
WITH THE HIGH END SC.Y. BEYOND TUESDAY THE MODELS STILL DIVERGE IN
SOLUTIONS, SO CONFIDENCE IS LOW IN THE GENERAL WIND PATTERN. WENT
WITH THE CONS MODEL FOR THESE WINDS, WHICH APPEARS TO SHOW
ELEVATED WINDS WEDNESDAY AND THURSDAY. OTHERWISE, LONG PERIOD
WESTERLY SWELL WILL IMPACT THE WATERS FOR THE REST OF THIS WEEK.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     WINTER WEATHER ADVISORY UNTIL 3 AM PST TUESDAY FOR CAZ003-004.

NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY UNTIL 9 PM PST WEDNESDAY FOR
     PZZ450-455-470-475.

&&

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HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
238 PM PST MON DEC 15 2014

CAZ001>004-076-162245-
REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR-
UPPER TRINITY RIVER-MENDOCINO INTERIOR-
238 PM PST MON DEC 15 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.