Fire Weather Watch 2, NWS Eureka, CA

000 
WWUS86 KEKA 101255
RFWEKA

FIRE WEATHER WATCH
NATIONAL WEATHER SERVICE EUREKA CA
600 AM PDT TUE JUL 10 2007

CAZ283-110600-
/O.CON.KEKA.FW.A.0002.070710T2100Z-070711T0600Z/
TRINITY...WESTERN PORTION OF THE SHASTA TRINITY NATIONAL FOREST.-
550 AM PDT TUE JUL 10 2007

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM 2 PM PDT THIS
AFTERNOON THROUGH THIS EVENING FOR DRY LIGHTNING...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A FIRE WEATHER
WATCH...WHICH IS IN EFFECT FROM 2 PM THIS AFTERNOON THROUGH 11 PM 
THIS EVENING FOR DRY LIGHTNING OVER AREAS OF FIRE WEATHER ZONE 283
INCLUDING THE WESTERN PORTION OF THE SHASTA TRINITY NF.

ISOLATED DRY THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE
HIGHER ELEVATIONS OF NORTHERN CALIFORNIA THIS AFTERNOON.
MID LEVEL MOISTURE WILL INCREASE OVER THE FORECAST AREA THIS 
AFTERNOON AND INCREASE THE CHANCES FOR THUNDERSTORM DEVELOPMENT.
VERY LITTLE OR NO RAIN IS EXPECTED WITH A FEW STORMS TODAY.
ISOLATED DRY LIGHTNING MAY OCCUR FOR A SHORT PERIOD OF TIME 
THIS AFTERNOON AND EARLY THIS EVENING PRIMARILY OVER THE
WESTERN PORTION OF THE SHASTA TRINITY NATIONAL FOREST. LATE TONIGHT 
THROUGH WEDNESDAY...WET THUNDERSTORMS ARE EXPECTED AS AN UPPER LOW 
MOVES TOWARDS THE NORTHERN CALIFORNIA COAST.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$

000 
WWUS86 KEKA 101638
RFWEKA

FIRE WEATHER WATCH
NATIONAL WEATHER SERVICE EUREKA CA
938 AM PDT TUE JUL 10 2007

CAZ283-101745-
/O.CAN.KEKA.FW.A.0002.070710T2100Z-070711T0600Z/
TRINITY...WESTERN PORTION OF THE SHASTA TRINITY NATIONAL FOREST.-
938 AM PDT TUE JUL 10 2007

...FIRE WEATHER WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN EUREKA HAS CANCELED THE FIRE
WEATHER WATCH OVER FIRE WEATHER ZONE 283 INCLUDING THE WESTERN
PORTION OF THE SHASTA TRINITY NF.

AN ABUNDANCE OF LOW AND MID LEVEL MOISTURE WILL MOVE INTO NORTHWEST
CALIFORNIA FROM THE SOUTH THIS AFTERNOON AND TONIGHT. THE MOISTURE
WILL COMBINE WITH MODERATE INSTABILITY TO FORM ISOLATED TO
SCATTERED THUNDERSTORMS ACROSS MUCH OF NORTHERN CALIFORNIA AND
SOUTHERN OREGON.

THUNDERSTORMS THAT FORM ON THE LEADING EDGE OF THE MOISTURE THIS
AFTERNOON AND EARLY EVENING MAY EXPERIENCE ISOLATED LIGHTNING
STRIKES THAT ARE NOT ACCOMPANIED BY RAINFALL. HOWEVER...STORMS
WILL QUICKLY BECOME WET WITHIN 1 TO 2 HOURS AS ADDITIONAL MOISTURE
MOVES INTO THE REGION.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
500 AM PDT MON JUL 9 2007

.SYNOPSIS...LOW PRESSURE WEST OF THE CENTRAL CALIFORNIA COAST
IS EXPECTED TO DRAW MOISTURE INTO NORTHWEST CALIFORNIA TUESDAY
AND WEDNESDAY. THIS INCREASE IN MOISTURE WILL RESULT IN A DECREASE
IN STABILITY OVER THE REGION AND CREATE A FAVORABLE ENVIRONMENT
FOR THUNDERSTORM DEVELOPMENT.

&&

.SHORT TERM...EARLY MORNING WATER VAPOR IMAGERY SHOWED AN UPPER LOW
DEVELOPING WEST OF MONTEREY. EXPECT THIS LOW TO SPREAD MOISTURE ALOFT
INTO THE FORECAST THROUGH WED AS IT LINGERS OFF THE COAST OF CENTRAL
CAL. THE GREATEST PULL OF MOIST AIR FROM THE TROPICS APPEARS TO
BE TUE NIGHT INTO WED MORNING...WITH PWAT VALUES GOING UP TO 1.5
INCHES. FOR TODAY...A FEW TSTMS SHOULD POP UP WITH HEATING OF THE
DAY OVER THE HIGHER TERRAIN...MAINLY OVER THE ALPS AND YOLLA BOLLY
MTNS. DYNAMICS SEEM WEAK AND EXPECT STORMS TO DISSIPATE WITH LOSS OF
DAYTIME HEATING. PLUS...MOISTURE CONTENT IS STILL LOW AND THERE IS A
SMALL THREAT FOR DRY LIGHTNING...BUT ACTIVITY WILL BE TOO LIMITED
FOR WATCHES OR WARNINGS. THE TREND IS FOR INCREASING CHANCES FOR
WET TSTMS TUE AND WED. TUE NIGHT/WED MORNING APPEARS TO BE THE BEST
TIME FRAME FOR WET STORMS OR SHOWERS...AS THE UPPER LOW MOVES UP
FROM THE SOUTHWEST.

FOR THU AND FRI FLOW ALOFT DRIES OUT AND STABILITY INCREASES AS THE
LOW MOVES OFF TO THE NORTH. THUS HAVE REMOVED TSTMS FROM THE
FORECAST. HAVE LEFT 10-16% POPS FOR DRIZZLE PROSPECTS FRI AND SAT.
GFS HAS BACKED OFF ON THE HIGH PWAT PLUME FORECASTED TO COME IN
FROM HAWAII AREA AND INTO NORTHERN CA C0AST OVER THE WEEKEND. SW
FLOW IS TYPICALLY DRY THIS TIME OF YEAR. SUSPECT THE MODEL IS
OVERDONE AND THAT NEW RUNS WILL REDUCE THE PWAT VALUES. DJB

&&

.AVIATION...STRATUS LAYER REDEVELOPED OVER NEAR COASTAL AREAS AND
COASTAL VALLEYS THIS MORNING WITH BASES GENERALLY NEAR 600 FT.
EXPECT TO SEE SOME LIFR CIGS IN LOCALIZED AREAS AS THE MORNING
DEVELOPS...WITH VSBY IN THE IFR/MVFR CATEGORY. WILL SEE PARTIAL
CLEARING TO THE COAST THIS AFTERNOON AND REDEVELOPMENT OF THE
STRATUS LAYER LATER TONIGHT. INTERIOR LOCATIONS WILL REMAIN MOSTLY
CLEAR.

&&

.MARINE...A STRONG SURFACE PRESSURE GRADIENT BETWEEN THE EASTERN
PACIFIC HIGH AND THERMALLY INDUCED LOW PRESSURE OVER THE CALIFORNIA
INTERIOR WILL CONTINUE TO PRODUCE GALE FORCE WINDS TODAY INTO THIS
EVENING...MAINLY BEYOND 20 NM...BUT AREAS NEAR AND SOUTH OF CAPES
AND POINTS WILL ALSO EXPERIENCE SOME GALE FORCE GUSTS TODAY.
STARTING TUESDAY MODELS DEPICT MUCH LIGHTER WINDS OVER THE COASTAL
WATERS AS LOW PRESSURE PUSHES OFFSHORE. WINDS WILL REMAIN IN THE 5
TO 10 KNOT RANGE WITH SWELL BECOMING WEST AT AROUND 3 FEET THROUGH
FRIDAY.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...GALE WARNING AND HAZARDOUS SEAS
WARNING FROM PT ST GEORGE TO PT ARENA 20-60NM OFFSHORE. SMALL CRAFT
ADVISORY FROM PT ST GEORGE TO PT ARENA OUT 20NM.

&&

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