Special Weather Statement, NWS Eureka, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
403 AM PDT WED OCT 5 2011

.SYNOPSIS...WIDESPREAD RAIN AND HIGH ELEVATION SNOW SHOWERS WILL
PERSIST TODAY AND DIMINISH OVERNIGHT INTO THU. DRIER AND WARMER
WEATHER WILL RETURN THU AND CONTINUE INTO THE WEEKEND BEFORE RAIN
CHANCES INCREASE HEADING INTO NEXT WEEK.
&&

.DISCUSSION...BREIF LULL IN PRECIP EARLY THIS MORNING WITH SCT
SHOWERS ACROSS THE REGION. MINOR SHORTWAVE ROTATING AROUND BASE OF
LONG WAVE TROUGH WILL REACH THE COAST AROUND SUNRISE WITH
INCREASING SHOWER COVERAGE. LONG WAVE TROUGH WILL MOVE ACROSS NW
CA TODAY WITH STEEPENING LAPSE RATES (7-8 C/KM) UNDERNEATH A COLD
UPPER LOW (-27C AT H5) SUPPORTING ISOLD TSTM DEVELOPMENT.
SOME STORMS MAY DEVELOP A STRONG ENOUGH UPDRAFT TO PRODUCE SMALL
HAIL ESPECIALLY GIVEN SUCH A COLD AIRMASS...SO LEFT MENTION OF
SMALL HAIL IN FOR TODAY. SHOWER ACTIVITY WILL GRADUALLY DIMINISH
OVERNIGHT AS UPPER LOW MOVES INLAND WITH A FEW SHOWERS LINGERING
THROUGH THU MORNING. UPPER RIDGE BEGINS TO BUILD INTO THE PAC NW
THU WITH SOME CLEARING EXPECTED ACROSS THE REGION. GIVEN RECENT
RAINS AND CLEARING SKIES...ADDED FG TO FCST THU AND FRI MORNINGS.
OTHERWISE...PARTLY CLOUDY SKIES WILL PREVAIL ALONG WITH WARMING
TEMPERATURES THROUGH THE END OF THE WEEK. UPPER RIDGE WEAKENS SUN
AS ANOTHER DISTURBANCE APPROACHES THE PAC NW WITH A WEAK FRONT
EXPECTED TO BRING SCHC POPS TO THE OR/CA BORDER. MODELS ESTABLISH
ZONAL FLOW FOR THE FIRST HALF OF NEXT WEEK. THIS COULD LEAD TO A
SERIES OF WEAK DISTURBANCES MOVG ACROSS THE AREA...SO KEPT POPS AT
OR SLIGHTLY ABOVE CLIMO N OF CAPE MENDO AND NEAR CLIMO S.
&&

.AVIATION...SHOWERY CONDITIONS WILL CONTINUE THRU THE DAY AT TAF
SITES WITH PERIODS OF MVFR. BRIEF IFR CONDITIONS WILL REMAIN
POSSIBLE WITH THE HEAVIEST SHOWER ACTIVITY. A FEW TSTMS REMAIN
POSSIBLE AS WELL TODAY...ALTHO THESE WILL BE BEST HANDLED BY
AMENDMENTS AS OPPOSED TO LONG STRETCHES OF VCTS. GENERALLY LIGHT
WINDS ARE ANTICIPATED ALTHO SOME STRONGER WINDS WILL LINGER OFF
THE COAST. /SEC
&&

.MARINE...WINDS HAVE SUBSIDED OVER THE COASTAL WATERS...AND THE
GALE WARNING THAT WAS EXTENDED A BIT HAS EXPIRED. IN ITS PLACE...
A SMALL CRAFT ADVISORY HAS BEEN HOISTED FOR THE ENTIRE MARINE
AREA. THE ADVISORY IS SPLIT BETWEEN NEAR SHORE AND OFFSHORE...
MAINLY DUE TO THE END TIMING. W TO NW SWELL TRAIN IS EXPECTED TO
PEAK AROUND 13 FT NEAR SHORE AND POSSIBLY UP TO 15 FT OFFSHORE
TONIGHT. NW SWELL AND LIGHT TO MODERATE N WIND WAVES ARE EXPECTED
TO PERSIST INTO THE WEEKEND AS HIGH PRESSURE PREVAILS SW OF THE
AREA. WAVE MODELS CONTINUE TO SHOW A LONG PERIOD S TO SW SWELL
MOVING INTO THE AREA TODAY AND TONIGHT. INITIALLY IT WILL BE
AROUND A FOOT AT 20 SECONDS AND GRADUALLY BUILD TO AROUND 3 FT BY
FRIDAY. /SEC
&&

.EKA WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY UNTIL 4 PM PDT THURSDAY PZZ450-455.
SMALL CRAFT ADVISORY UNTIL 4 PM PDT FRIDAY PZZ470-475.
&&

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HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
451 AM PDT WED OCT 5 2011

CAZ001>003-076-061200-
REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR-
MENDOCINO INTERIOR-
451 AM PDT WED OCT 5 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT.

AN UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE REGION MAINTAINING
RAIN SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS TODAY. THE
STRONGEST STORMS MAY PRODUCE SMALL HAIL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

CAZ004-061200-
UPPER TRINITY RIVER-
451 AM PDT WED OCT 5 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT.

AN UPPER LEVEL DISTURBANCE MOVING ACROSS THE REGION WILL MAINTAIN
RAIN AND HIGH ELEVATION SNOW SHOWERS ALONG WITH A SLIGHT CHANCE OF
THUNDERSTORMS TODAY. SNOW ACCUMULATIONS OF 1 TO 3 INCHES POSSIBLE
ABOVE 5500 FEET THROUGH THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
728 AM PDT WED OCT 5 2011

CAZ001-003-051515-
HUMBOLDT CA-DEL NORTE CA-
728 AM PDT WED OCT 5 2011

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN DEL NORTE COUNTY IN NORTHWEST CALIFORNIA
  EXTREME NORTH CENTRAL HUMBOLDT COUNTY IN NORTHWEST CALIFORNIA

UNTIL 815 AM PDT

AT 720 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES SOUTHWEST OF KLAMATH..MOVING EAST AT 25
MPH.

PEA SIZE HAIL HAIL IS EXPECTED WITH THIS STORM...ALONG WITH HEAVY
RAIN.

PLEASE SLOW DOWN IF YOU ENCOUNTER HAIL ON THE ROADWAY.

LOCATIONS IMPACTED INCLUDE...
   KLAMATH...

LAT...LON 4162 12373 4139 12371 4139 12408 4148 12408
      4151 12410 4154 12410 4156 12411 4158 12411
TIME...MOT...LOC 1426Z 267DEG 21KT 4149 12410

JCA