Area Forecast Discussion
Issued by NWS Eureka, CA

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000
FXUS66 KEKA 261111
AFDEKA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
411 AM PDT SUN APR 26 2015

.SYNOPSIS...A RIDGE OF HIGH PRESSURE OVER THE WEST COAST WILL
LEAD TO DRY WEATHER AND A WARMING TREND ACROSS THE INTERIOR
TODAY THROUGH MONDAY. INTERIOR DAYTIME TEMPERATURES WILL BE ABOVE
NORMAL TODAY THROUGH TUESDAY. INTERIOR TEMPERATURES WILL COOL
TUESDAY AND WEDNESDAY AS THE RIDGE SHIFTS FURTHER INLAND.

&&

.DISCUSSION...A RIDGE OF HIGH PRESSURE IS OVER THE WEST COAST AND
WILL REMAIN IN PLACE THROUGH MONDAY. THIS WILL BRING DRY WEATHER
TO NORTHWEST CALIFORNIA. AS FOR TEMPERATURES, THEY WILL CONTINUE
TRENDING UPWARD TODAY AND MONDAY ACROSS THE INTERIOR, BEING ABOVE
NORMAL. WIDESPREAD VALLEY TEMPERATURES IN THE 80S ARE FORECASTED
ON MONDAY AND A FEW 90S ARE NOT OUT OF THE QUESTION. BUT THIS
WON`T LAST LONG AS INTERIOR TEMPERATURES WILL BEGIN TRENDING BACK
DOWNWARD ON TUESDAY AS THE RIDGE SHIFTS INLAND AND A TROUGH
APPROACHES FROM THE PACIFIC. BUT EVEN WITH THE TEMPERATURES
TRENDING DOWNWARD, THEY WILL REMAIN A FEW DEGREES ABOVE NORMAL ON
TUESDAY. THE TROUGH WILL APPROACH ON TUESDAY AND AN ASSOCIATED
VERY WEAK DISTURBANCE WILL PASS TO OUR NORTH TUESDAY MORNING. THIS
WILL BRING US SOME HIGH LEVEL CLOUDS AND A SLIGHT CHANCE OF VERY
LIGHT RAIN SHOWERS TO DEL NORTE COUNTY. WILL EMPHASIZE THE ODDS OF
THIS ARE LOW, BUT NOT ZERO. ANY QPF WILL BE BARELY MEASURABLE.
MODELS SHOW THE TROUGH MOVING OVER US LATE TUESDAY INTO WEDNESDAY,
BRINGING COOLER TEMPERATURES. NO PRECIPITATION IS EXPECTED. AS A
RESULT, POPS REMAIN SLIGHTLY BELOW CLIMO DURING THIS TIME PERIOD.
ZONAL FLOW DEVELOPS THURSDAY AND CONTINUES THROUGH THE END OF THE
WEEK. TEMPERATURES REFLECT THE CONSMODEL.

&&

.AVIATION...VFR WILL DOMINATE ALL NW CAL AIR STRIPS TODAY. A WEAK
ONSHORE PUSH TONIGHT MAY BRING SOME MVFR/IFR CONDITIONS TO ACV AND
THE HUMBOLDT BAY REGION LATE TONIGHT. MODELS ARE INDICATING HIGH
BOUNDARY LAYER MOISTURE BETWEEN TRINIDAD AND THE EEL RIVER DELTA
THROUGH THESE HOURS. HOWEVER, CONFIDENCE IS NOT HIGH ENOUGH TO
INCLUDE IT IN THE FORECAST AT THE 12Z ISSUANCE. BFG

&&

.MARINE...A WEAK PRESSURE GRADIENT OVER THE AREA WILL MAINTAIN
LIGHT TO MODERATE WINDS THROUGH MONDAY. WINDS ARE FORECAST TO PEAK
MONDAY AFTERNOON AND EARLY EVENING AS THE DIURNAL THERMAL TROUGH
STRENGTHENS ACROSS INTERIOR NW CAL, CAUSING A TIGHTENING PRESSURE
GRADIENT OVER THE COASTAL WATERS. A WEAK COASTAL JET IS POSSIBLE
AROUND POINT SAINT GEORGE, CAPE MENDOCINO, AND POINT ARENA DURING
THIS TIME. THIS COULD BRING WINDS BRIEFLY INTO THE LOW 20 KNOT
RANGE AND WOULD CAUSE LOCALLY STEEP WAVES. AT THIS POINT DON`T
THINK THE 20+ KNOT WINDS WILL BE WIDESPREAD ENOUGH TO WARRANT A
SMALL CRAFT ADVISORY, BUT WILL NEED TO BE MONITORED. A WEAK FRONT
IS FORECAST TO CROSS THE WATERS ON TUESDAY WHICH WILL BREAK UP THE
PRESSURE GRADIENT, ALLOWING WINDS TO EASE AGAIN. A NW SWELL WILL
CONTINUE TO PROPAGATE THROUGH THE WATERS THROUGH WEDNESDAY. HIGH
PRESSURE IS EXPECTED TO BUILD OVER THE EASTERN PACIFIC FOR THE
SECOND HALF OF THE WEEK WHICH MAY YIELD NEAR GALE CONDITIONS ON
THURSDAY. BFG

&&

.EKA WATCHES/WARNINGS/ADVISORIES...

CA...NONE.

NORTHWEST CALIFORNIA COASTAL WATERS...NONE.

&&

$$

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