Area Forecast Discussion
Issued by NWS Eureka, CA

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FXUS66 KEKA 231038
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
338 AM PDT WED JUL 23 2014

.SYNOPSIS...A WEAK FRONT WILL MOVE ONSHORE TODAY...BRINGING SOME
LIGHT RAIN SHOWERS TO THE REDWOOD COAST THIS MORNING. HIGH
PRESSURE WILL BUILD IN BEHIND THE FRONT AND THIS WILL BRING HOT
AND DRY CONDITIONS TO THE INLAND LOCATIONS...PERSISTING INTO THE
WEEKEND.

&&

.DISCUSSION...A WEAK FRONT IS APPROACHING NORTHWEST CALIFORNIA
THIS MORNING. 1030Z RADAR SHOWS SHOWERS ASSOCIATED WITH THIS FRONT
OFFSHORE AND APPROACHING THE COAST. THE REDWOOD COAST CAN EXPECT
SHOWERS THIS MORNING, WITH THE GREATEST THREAT BEING OVER DEL
NORTE COUNTY. QPF SHOULD BE MINIMAL, PROBABLY LESS THAN 0.1 INCHES
NEAR THE CA/OR BORDER, DECREASING FURTHER TO THE SOUTH. SHOWERS
WILL DECREASE THIS MORNING AND AFTERNOON AS THE FRONT MOVES
INLAND. HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT AND THIS WILL
BRING HOT AND DRY CONDITIONS TO THE INLAND LOCATIONS. TOWARDS THE
END OF THE WEEK THE FOUR CORNERS RIDGE EXPANDS BACK INTO NORTHWEST
CALIFORNIA, ALLOWING INLAND TEMPERATURES TO RISE INTO THE LOW
100S. MODELS STILL SHOW A CUT-OFF LOW FORMING TO OUR SOUTHWEST
LATE THIS WEEK. HOWEVER, THEY HAVE BACKED OFF ON IT`S STRENGTH,
WHICH WOULD REDUCE OUR THUNDERSTORM THREAT. REGARDLESS, THIS WILL
CONTINUE TO BE WATCHED FOR THE NEXT THREAT OF THUNDERSTORMS.

&&

.AVIATION...AN UPPER TROUGH AND ASSOCIATED COLD FRONT MOVING
ACROSS THE AREA TODAY WILL MAINTAIN MVFR/IFR CIGS THROUGH THE DAY.
AS THE COLD FRONT SLIPS ACROSS THE AREA THIS AFTERNOON, LIGHT RAIN
WILL LIKELY FALL AT AIR STRIPS ACROSS DEL NORTE AND HUMBOLDT
COUNTIES (CEC AND ACV). NO RAIN IS EXPECTED ACROSS MENDOCINO
COUNTY, WITH THE EXCEPTION OF SOME POSSIBLE LIGHT DRIZZLE ALONG
THE COAST. BEHIND THE FRONT MOST AREAS SHOULD SEE SOME CLEARING
AND LIFTING CIGS ALLOWING FOR VFR. BFG

&&

.MARINE...AN UPPER LEVEL TROUGH MOVING EAST ACROSS THE WEST COAST
TODAY WILL PULL A WEAK SURFACE COLD FRONT OVER THE COASTAL WATERS
THIS EVENING. WINDS WILL REMAIN LIGHT AHEAD OF THE FRONT AS THE
SURFACE PRESSURE GRADIENT CONTINUES TO BE WEAK. SEAS WILL BEGIN TO
BUILD SLIGHTLY THROUGH THE DAY AS POST FRONTAL SWELL OUT RUNS THE
FRONT. BEHIND THE FRONT HIGH PRESSURE WILL BUILD TOWARD THE REGION
FROM THE WEST. THIS WILL TIGHTEN THE SURFACE PRESSURE GRADIENT
CAUSING INCREASING NORTHERLY WINDS AND BUILDING STEEP SEAS. MODELS
ARE SHOWING THE POSSIBILITY OF GALE CONDITIONS DEVELOPING THURSDAY
EVENING OVER THE OUTER WATERS. HOLDING OFF ON ISSUING A GALE WATCH
OR WARNING, BUT WILL LIKELY NEED ONE IF THE 12Z MODELS CONTINUE TO
REMAIN CONSISTENT. REGARDLESS, CONDITIONS ARE EXPECTED TO REMAIN
ELEVATED INTO NEXT WEEK, ESPECIALLY ACROSS THE OUTER WATERS. BFG

&&

.EKA WATCHES/WARNINGS/ADVISORIES...

CA...NONE.

NORTHWEST CALIFORNIA COASTAL WATERS...

SMALL CRAFT ADVISORY FOR PZZ475.

&&

$$

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