Frost Advisory 11, NWS Eureka, CA

809 
WWUS76 KEKA 032125 AAA
NPWEKA

URGENT - WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE EUREKA CA
225 PM PDT MON MAY 3 2010

CAZ003-004-041500-
/O.EXT.KEKA.FR.Y.0011.100504T0800Z-100504T1500Z/
NORTH COAST INTERIOR-UPPER TRINITY RIVER-
225 PM PDT MON MAY 3 2010

...FROST ADVISORY NOW IN EFFECT FROM 1 AM TO 8 AM PDT TUESDAY...

THE FROST ADVISORY IS NOW IN EFFECT FROM 1 AM TO 8 AM PDT
TUESDAY. 

* FROST WILL FORM AFTER MIDNIGHT AND PERSIST UNTIL SHORTLY AFTER 
  SUNRISE. 

* THE MOST PREVALENT REGIONS FOR FROST WILL BE IN VALLEYS AND 
  DRAINAGES. 

* TEMPERATURE SENSITIVE VEGETATION MAY BE ADVERSELY IMPACTED OR 
  KILLED BY A LATE SEASON FROST. SUCH VEGETATION SHOULD BE 
  COVERED OR MOVED INSIDE. ADDITIONALLY...PETS SUSCEPTIBLE TO 
  THE COLD SHOULD BE BROUGHT INSIDE TONIGHT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

287 
WWUS76 KEKA 041014
NPWEKA

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
314 AM PDT TUE MAY 4 2010

CAZ004-042315-
/O.NEW.KEKA.FZ.A.0002.100505T0800Z-100505T1600Z/
/O.CON.KEKA.FR.Y.0011.000000T0000Z-100504T1500Z/
UPPER TRINITY RIVER-
314 AM PDT TUE MAY 4 2010

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY
MORNING...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A FREEZE
WATCH...WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY
MORNING. A FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS
MORNING. 

* FROST WILL PERSIST UNTIL SHORTLY AFTER SUNRISE THIS MORNING.
  ANOTHER COLD NIGHT TONIGHT INTO WEDNESDAY MORNING WITH
  TEMPERATURES EXPECTED TO DROP BELOW FREEZING.

* TEMPERATURE SENSITIVE VEGETATION MAY BE ADVERSELY IMPACTED OR 
  KILLED BY A LATE SEASON FROST. SUCH VEGETATION SHOULD BE 
  COVERED OR MOVED INSIDE. ADDITIONALLY...PETS SUSCEPTIBLE TO 
  THE COLD SHOULD BE BROUGHT INSIDE TONIGHT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

CAZ003-041500-
/O.CON.KEKA.FR.Y.0011.000000T0000Z-100504T1500Z/
NORTH COAST INTERIOR-
314 AM PDT TUE MAY 4 2010

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING...

A FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING. 

* FROST WILL WILL PERSIST UNTIL SHORTLY AFTER SUNRISE.

* THE MOST PREVALENT REGIONS FOR FROST WILL BE IN VALLEYS AND 
  DRAINAGES. 

* TEMPERATURE SENSITIVE VEGETATION MAY BE ADVERSELY IMPACTED OR 
  KILLED BY A LATE SEASON FROST. SUCH VEGETATION SHOULD BE 
  COVERED OR MOVED INSIDE. ADDITIONALLY...PETS SUSCEPTIBLE TO 
  THE COLD SHOULD BE BROUGHT INSIDE TONIGHT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

065 
WWUS76 KEKA 041511
NPWEKA

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
811 AM PDT TUE MAY 4 2010

CAZ004-050415-
/O.EXP.KEKA.FR.Y.0011.000000T0000Z-100504T1500Z/
/O.CON.KEKA.FZ.A.0002.100505T0800Z-100505T1600Z/
UPPER TRINITY RIVER-
811 AM PDT TUE MAY 4 2010

...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY MORNING...
...FROST ADVISORY HAS EXPIRED...

THE FROST ADVISORY IS NO LONGER IN EFFECT. A FREEZE WATCH REMAINS
IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

CAZ003-041615-
/O.EXP.KEKA.FR.Y.0011.000000T0000Z-100504T1500Z/
NORTH COAST INTERIOR-
811 AM PDT TUE MAY 4 2010

...FROST ADVISORY HAS EXPIRED...

THE FROST ADVISORY IS NO LONGER IN EFFECT. 

$$

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE EUREKA CA
532 AM PDT MON MAY 3 2010

.SYNOPSIS...THE TAIL END OF A WEAK FRONTAL SYSTEM WILL MOVE ACROSS
THE REGION TODAY BRINGING A CHANCE OF LIGHT RAIN TO AREAS NORTH OF
MENDOCINO COUNTY. HIGH PRESSURE WILL REBUILD INTO THE REGION IN THE
WAKE OF THE FRONT WITH DRY WEATHER EXPECTED BEGINNING BY THE MIDDLE
OF THE WEEK.
&&

.DISCUSSION...AN UPPER LEVEL DISTURBANCE MOVING OVER THE RIDGE
WILL PUSH THE TAIL END OF A FRONT ACROSS NW CA TODAY. SCHC POPS IN
SRN HUMBOLDT AND TRINITY COUNTY INCREASE HEADING N WITH GREATEST
CHCS OF PRECIP ALONG THE ORCA BORDER. CONTINUE TO EXPECT RAINFALL
TOTALS OF A TENTH OF AN INCH OR TWO MAINLY OVER DEL NORTE COUNTY.
THIS SYSTEM WILL MOVE OFF TO THE E BY TUE MORNING BUT MODELS IN
GOOD AGREEMENT IN A SECONDARY SURGE OF ENERGY DIVING DOWN THE E
HALF OF THE UPPER RIDGE OFFSHORE. LATEST MODEL SOLUTIONS SHOW THIS
SECONDARY IMPULSE MOVING ASHORE BY WED MORNING WELL N OF CWA
BEFORE MOVING ESE AS IT MOVES FURTHER INLAND. LIMITED MOISTURE AND
THE NORTHERN TRAJECTORY OF THIS SYSTEM WILL LIMIT POPS TO A SHOWER
OR TWO. THE MAIN FCST CHALLENGE WITH THIS FEATURE IS THE POTENTIAL
FOR FROST/FREEZE WED MORNING. MODEL CONSENSUS IS FOR A FAIRLY
ZONAL FLOW ACROSS THE W COAST FOR THE SECOND HALF OF THE WEEK WITH
MINOR PERTURBATIONS MOVING QUICKLY ACROSS THE REGION. LIMITED
MOISTURE AND QUICK MOVEMENT OF THESE DISTURBANCES WILL INHIBIT
PRECIP ALTHOUGH A SHOWER OR TWO CANNOT BE RULED OUT. PRECIP CHCS
BEGIN TO INCREASE HEADING INTO THE WEEKEND AS A TROUGH DEEPENS
OVER THE E PAC. MODEL SOLUTIONS DIFFER IN RESPECT TO TIMING AND
INTENSITY BUT A WETTER AND COOLER PATTERN IS IN STORE HEADING INTO
NEXT WEEK. BC &&

.AVIATION...12Z MONDAY-12Z TUESDAY...AREAS OF MVFR CEILINGS WILL
PERSIST THROUGH AT LEAST 21Z TODAY ALONG THE COAST MAINLY NORTH OF
KACV AHEAD OF AND ALONG A A WEAK COLD FRONT. SOME LIGHT RAIN OR
SHOWERS MAY ALSO DEVELOP...PRIMARILY NORTH OF CAPE MENDOCINO.
CEILINGS WILL TREND HIGHER AND BECOME LARGELY VFR FROM MID AFTERNOON
THROUGH EVENING...ALTHOUGH LOCAL MVFR CEILINGS WILL STILL BE
POSSIBLE ESPECIALLY NEAR HUMBOLDT BAY. VFR WILL PREVAIL THROUGH THE
TAF PERIOD IN INTERIOR LOCALES. WIND SPEEDS WILL BE WEAKER
TODAY...ALTHOUGH SOME LOCALLY GUSTY CONDITIONS ARE POSSIBLE LATE
THIS AFTERNOON AND EVENING BEHIND THE FRONTAL BOUNDARY. BETTWY
&&

.MARINE...NORTH WINDS CONTINUE TO DIMINISH EARLY THIS MORNING
AND WILL REMAIN MUCH WEAKER THROUGH THE DAY...ALTHOUGH GUSTS TO 25
KT WILL STILL BE POSSIBLE OVER THE SOUTHERN WATERS. THE PRESSURE
GRADIENT WILL BEGIN TO TIGHTEN LATE TONIGHT INTO EARLY TUESDAY...AND
GALE FORCE CONDITIONS ARE POSSIBLE OVER ALL BUT THE NORTHERN INNER
WATERS LATE TUESDAY MORNING THROUGH WEDNESDAY EVENING. WE HOISTED A
GALE AND HAZARDOUS SEAS WATCH FOR THIS PERIOD...EXCEPT FOR ZONE 450
WHERE WINDS SHOULD REMAIN BELOW 35KT. SEAS WILL BE MAINLY WIND
DRIVEN...WITH STEEP WIND WAVES IN EXCESS OF 11 TO 12 FT POSSIBLE...
ESPECIALLY OVER THE SOUTHERN OUTER WATERS WHERE CONFIDENCE IN A
PROLONGED GALE EVENT IS HIGHEST. BETTWY
&&

.EKA WATCHES/WARNINGS/ADVISORIES...
GALE AND HAZARDOUS SEAS WATCHES FROM TUE MORNING THROUGH WED EVENING
FOR PZZ455-470-475.
SCA UNTIL TUE MORNING FOR PZZ455-475.
SCA FROM MIDNIGHT TONIGHT THROUGH WED FOR PZZ450.
SCA FROM 6 PM PDT TONIGHT THROUGH TUE EVENING FOR PZZ470.
&&

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
536 AM PDT MON MAY 3 2010

CAZ001>004-076-041245-
REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR-
UPPER TRINITY RIVER-MENDOCINO INTERIOR-
536 AM PDT MON MAY 3 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

AN UNSEASONABLY COLD AIRMASS OVER THE REGION COMBINED WITH MOSTLY
CLEAR SKIES OVERNIGHT TUE WILL ALLOW TEMPERATURES TO DROP INTO
THE MID TO UPPER 30S ALONG THE COAST WITH MID 30S TO BELOW
FREEZING TEMPERATURES OVER THE INTERIOR BY WED MORNING.

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