Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 232045
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
145 PM PDT WED JUL 23 2014

.SYNOPSIS...HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT AND THIS
WILL BRING HOT AND DRY CONDITIONS TO INLAND LOCATIONS. THESE
CONDITIONS WILL LAST THROUGH THE WEEKEND.



&&

.SHORT TERM...(THRU SAT) A WEAK FRONTAL BOUNDARY CONTINUES TO SAG
THROUGH NORTHWEST CALIFORNIA BRINGING SOME VERY WEAK SHOWERS TO
AREAS FROM HUMBOLDT BAY NORTHWARD. THIS FRONT WILL MOVE INLAND
THIS EVENING LEAVING THE AREA DRY THOUGH WITH SOME CLOUDS ACROSS
NORTHERN AND COASTAL AREAS.

CONDITIONS WILL CHANGE DRASTICALLY ON THURSDAY AS WARMER AND DRIER
AIR MOVES OVER THE REGION AS A HIGH PRESSURE SYSTEM BUILDS INTO
CALIFORNIA FROM THE EAST. 850 MB TEMPERATURES WILL WARM
SIGNIFICANTLY...BACK OVER 25C ACROSS INTERIOR AREAS BY THIS WEEKEND.
THIS WILL ALLOW AFTERNOON HIGH TEMPERATURES TO SPIKE BACK INTO THE
UPPER 90S AND POSSIBLY OVER 100 DEGREES. SOME AFTERNOON CUMULUS OVER
THE MOUNTAINS WILL BE POSSIBLE EACH AFTERNOON THROUGH SATURDAY...BUT
GENERALLY SUNNY SKIES ARE EXPECTED ACROSS THE INTERIOR.

SOME STRATUS WILL IMPACT COASTAL AREAS WHERE BOUNDARY LAYER MOISTURE
IS GREATER...HOWEVER MODELS INDICATE SOME DECENT DRYING IN THE
MARINE LAYER BEHIND THE DEPARTING FRONT OVERNIGHT. THIS MAY ALLOW
COASTAL LOCATIONS TO REMAIN MOSTLY CLEAR THURSDAY NIGHT AND POSSIBLY
FRIDAY NIGHT WITH WEAK OFFSHORE FLOW DEVELOPING. WITH THAT
SAID...AFTERNOON NORTHERLY WINDS ARE LIKELY TO INCREASE AS THE
THERMAL TROUGH STRENGTHENS ACROSS INTERIOR CALIFORNIA WHICH SHOULD
RESTRICT HIGH TEMPERATURES TO THE 60S FOR MOST COASTAL SITES. RPA

.LONG TERM...(SUN-WED)...MODELS CONTINUE TO INDICATE A WEAK
TROUGH ALOFT OR CUT-OFF LOW FORMING TO OUR SW SUN THROUGH WED.
THIS WILL NEED TO BE WATCHED FOR ANOTHER THREAT OF TSTMS IN
TRINITY COUNTY. OTHERWISE SEASONABLY WARM CONDITIONS IN THE
INTERIOR AND OCCASIONAL STRATUS AND FOG ALONG THE COAST LOOK TO BE
NORM THROUGH THE PERIOD.


&&

.AVIATION...A LINGERING FRONTAL SYSTEM IS BRINGING SOME LOW CLOUDS
AND LIGHT RAIN SHOWERS TO NORTHERN HUMBOLDT AND DEL NORTE COUNTIES
THIS AFTERNOON. THIS FRONT WILL MOVE INLAND THIS EVENING ALLOWING
SOME DRIER AIR TO FILTER INTO THE AREA AND VFR CONDITIONS TO
DEVELOP. HOWEVER SOME STRATUS SHOULD REDEVELOP LATER TONIGHT AT THE
COAST BRINGING AT LEAST PERIODS OF MVFR OR IFR CONDITIONS. CLEARING
SHOULD BE FAST THURSDAY MORNING WITH NORTHERLY WINDS INCREASING.

INTERIOR AREAS MAY SEE SOME LOW CLOUDS OVERNIGHT IN NORTHERN
VALLEYS...BUT GENERALLY VFR WILL PREVAIL. RPA


&&

.MARINE...HIGH PRESSURE WILL BUILD TOWARD THE REGION FROM THE WEST
TONIGHT THROUGH THU. THIS WILL TIGHTEN THE SURFACE PRESSURE GRADIENT
CAUSING INCREASING NORTHERLY WINDS AND BUILDING STEEP SEAS. MODELS
CONTINUE TO INDICATE MARGINAL GALE CONDITIONS WITH GUSTS TO 35 KT
DEVELOPING LATE THU AFTERNOON THROUGH THE EVENING OVER THE OUTER
WATERS. NORTHERLY SEAS WILL MOST LIKELY INCREASE DURING THIS TIME
FRAME...PEAKING TO AROUND 12 FT AT 8 SECONDS THU NIGHT. THUS WILL
HOIST A GALE  WARNING FOR BOTH PZZ475 AND PZZ470 STARTING LATE THU
AFTERNOON AND CONTINUING IT THROUGH SAT. CONDITIONS WILL LIKELY
REMAIN ELEVATED INTO NEXT WEEK, ESPECIALLY ACROSS THE OUTER WATERS.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
     SMALL CRAFT ADVISORY FROM 5 PM THURSDAY TO 9 AM PDT
     SATURDAY PZZ450.

     SMALL CRAFT ADVISORY FROM 9 AM TO 8 PM PDT THURSDAY PZZ470.

     GALE WARNING FROM 8 PM THURSDAY TO 8 PM PDT SATURDAY PZZ470.

     SMALL CRAFT ADVISORY FROM 5 PM THURSDAY TO 5 AM PDT
     FRIDAY PZZ455.

     SMALL CRAFT ADVISORY FROM 8 PM THIS EVENING TO 5 PM PDT
     THURSDAY PZZ475.

     GALE WARNING FROM 5 PM THURSDAY TO 11 AM PDT SATURDAY PZZ475.

&&

$$

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