Freeze Watch 3, NWS Eureka, CA

000 
WWUS76 KEKA 131058
NPWEKA

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
258 AM PST SAT JAN 13 2007

CAZ001-002-131700-
/O.CON.KEKA.FZ.W.0002.000000T0000Z-070113T1700Z/
/O.CON.KEKA.FZ.A.0003.070114T0800Z-070114T1700Z/
REDWOOD COAST-MENDOCINO COAST-
258 AM PST SAT JAN 13 2007

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
SUNDAY MORNING...

A VERY COLD AIRMASS AND CLEAR SKIES WILL KEEP TEMPERATURES BELOW
30 DEGREES UNTIL 9 AM THIS MORNING.
 
TEMPERATURES ARE EXPECTED TO BE BELOW FREEZING ONCE AGAIN TONIGHT
THROUGH EARLY SUNDAY MORNING IN THE COASTAL AREAS OF DEL NORTE...HUMBOLDT
AND MENDOCINO COUNTIES OF NORTHWEST CALIFORNIA. READINGS ON SUNDAY
MORNING SHOULD NOT BE AS COLD THIS MORNING...BUT WIDESPREAD MID
TO UPPER 20S CAN BE EXPECTED.

A FREEZE WARNING MEANS A FORECAST OF WIDESPREAD TEMPERATURES BELOW
30 DEGREES. RESIDENTS SHOULD TAKE NECESSARY MEASURES TO PROTECT
PLANTS AND ANIMALS. THESE STEPS INCLUDE BRINGING PETS INSIDE.
EXPOSED WATER PIPES AND SPRINKLER SYSTEMS SHOULD ALSO BE
PROTECTED.

A FREEZE WATCH MEANS WIDESPREAD TEMPERATURES BELOW 30 DEGREES ARE
EXPECTED...BUT NOT YET IMMINENT.

$$

KENNEDY

000 
WWUS76 KEKA 131805
NPWEKA

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
1005 AM PST SAT JAN 13 2007

CAZ001-002-141700-
/O.UPG.KEKA.FZ.A.0003.070114T0800Z-070114T1700Z/
/O.NEW.KEKA.FZ.W.0003.070114T0800Z-070114T1700Z/
REDWOOD COAST-MENDOCINO COAST-
1005 AM PST SAT JAN 13 2007

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
SUNDAY FOR A HARD FREEZE...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
SUNDAY. THE FREEZE WATCH IS NO LONGER IN EFFECT. 

TEMPERATURES ARE EXPECTED TO BE BELOW FREEZING ONCE AGAIN TONIGHT
THROUGH SUNDAY MORNING IN THE COASTAL AREAS OF DEL NORTE...HUMBOLDT
AND MENDOCINO COUNTIES OF NORTHWEST CALIFORNIA. WIDESPREAD
TEMPERATURES IN THE MID TO UPPER 20S CAN BE EXPECTED.

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

RESIDENTS SHOULD TAKE NECESSARY MEASURES TO PROTECT
PLANTS AND ANIMALS INCLUDING BRINGING PETS INSIDE. EXPOSED WATER
PIPES AND SPRINKLER SYSTEMS SHOULD ALSO BE PROTECTED.

TH

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
500 AM PST FRI JAN 12 2007

.SYNOPSIS...A COLD AND DRY AIR MASS WILL PERSIST ACROSS NORTHWEST
CALIFORNIA THROUGH SATURDAY MORNING. A GRADUAL WARMING TREND WILL
THEN TAKE HOLD AND PERSIST THROUGH EARLY NEXT WEEK.

&&

.DISCUSSION...THE COLD UPPER LEVEL LOW AND TROUGH IS NOW WELL EAST
OF THE CWA...BEHIND THE TROUGH A COLD AND DRY AIRMASS HAS MOVED OVER
NORTHWEST CALIFORNIA. ALONG THE NORTH COAST...A LIGHT OFFSHORE WIND
DEVELOPED AFTER MIDNIGHT AND THIS MODERATED SOME OF THE LOW
TEMPERATURES. HOWEVER...ANY LOCATION NOT IMPACTED BY THE DOWNSLOPE
NORTHEAST WIND WILL HAVE MINIMUM TEMPERATURES IN THE 20S...AS THE
DEW POINTS ARE IN THE 20S ALONG THE COAST. SO HAVE CONTINUED THE
FREEZE WARNING FOR THE COASTAL REGION OF THE CWA.

THE FREEZE WATCH CONTINUES FOR TONIGHT FOR THE COASTAL REGIONS.
MODEL GUIDANCE CONTINUES TO INDICATE THAT THE MID LEVELS WILL NOT
WARM TODAY AND OVERNIGHT. THE 1000 TO 500MB THICKNESS VALUES ARE
VERY SIMILAR BETWEEN THIS MORNING AND SATURDAY MORNING. THE AIRMASS
WILL REMAIN DRY AND THE OVERNIGHT DEW POINTS ARE FORECAST TO BE IN
THE UPPER TEENS TO LOWER 20S. THE MOS GUIDANCE STILL INDICATES
COLDER TEMPERATURES FOR SATURDAY MORNING THAN THIS MORNING...WITH A
LOW OF 18 DEGREES FAHRENHEIT FORECAST AT THE ARCATA AIRPORT.
HOWEVER...I KEPT THE LOWS IN THE 20S...AS THE OFFSHORE FLOW IS
EXPECTED TO HAVE SOME MODERATING AFFECT ON THE MINIMUM TEMPERATURES.

AS THE UPPER LEVEL LOW AND TROUGH MOVES FURTHER TO THE EAST...A
STRONG UPPER LEVEL RIDGE BUILDS OVER THE EASTERN PACIFIC...AND THE
MID LEVELS WILL WARM. THIS RIDGE IS EXPECTED TO HOLD THROUGH
TUESDAY. SO ALONG WITH A GRADUAL WARMING TREND...IT WILL REMAIN DRY
OVER HOLIDAY WEEKEND. THE RIDGE AXIS WILL MOVE ASHORE ON
TUESDAY...AS AN UPPER LEVEL TROUGH APPROACHES THE COAST.

FOR WEDNESDAY AND THURSDAY...THE MODELS STILL HAVE DIFFERING
SOLUTIONS ON HOW THE APPROACHING UPPER LEVEL TROUGH WILL ULTIMATELY
BEHAVE. LATEST GUIDANCE POINTS TO A CUT-OFF LOW DEVELOPING
OFFSHORE...RATHER THAN PUSHING ASHORE UNDERNEATH THE RIDGE. WHILE
THIS SOLUTION APPEARS MORE REASONABLE...CONFIDENCE REMAINS LOW IN
THE CURRENT SOLUTION OF THE PLACEMENT OF THE CUT-OFF LOW. ANY IMPACT
ON NORTHWEST CALIFORNIA WILL DEPEND ON HOW FAR OFFSHORE THE LOW
REMAINS AS IT DRIFTS SOUTHWARD. SO HAVE CONTINUED WITH THE CURRENT
DRY FORECAST THROUGH DAY 7.

KENNEDY

&&

.AVIATION...A VERY COLD AND DRY AIRMASS OVER THE REGION COUPLED WITH
A LIGHT OFFSHORE FLOW WILL LEAD TO PREVAILING VFR CONDITIONS AT ALL
NORTHWEST CALIFORNIA AIRPORTS THROUGH TONIGHT. PERIODS OF MVFR VSBYS
CAN BE EXPECTED DURING THE EARLY MORNING AND OVERNIGHT HOURS...FROM
LIGHT MIST IN LOCAL RIVER VALLEYS.

EL

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY FOR WIND AND HAZARDOUS SEAS PT ST GEORGE TO PT
ARENA OUT 60NM.
FREEZE WARNING CAZ001-002 UNTIL 900 AM THIS MORNING.
FREEZE WATCH CAZ001-002 FOR SATURDAY MORNING.

&&

VISIT US AT WWW.WEATHER.GOV/EUREKA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
500 AM PST FRI JAN 12 2007

CAZ001-002-131300-
REDWOOD COAST-MENDOCINO COAST-
500 AM PST FRI JAN 12 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

A FREEZE WARNING CONTINUES UNTIL 900 AM THIS MORNING. SEE
SFONPWEKA FOR DETAILS.

A FREEZE WATCH REMAINS IN EFFECT FOR TONIGHT INTO EARLY SATURDAY
MORNING AS RECORD LOW TEMPERATURES AND A HARD FREEZE ARE EXPECTED.
SEE SFONPWEKA FOR DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...NONE.