678
FXUS66 KEKA 102228
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
328 PM PDT FRI MAY 10 2024
SYNOPSIS
DRY WEATHER AND ABOVE NORMAL TEMPERATURES THROUGH
SATURDAY. A SHORTWAVE TROUGH WILL BRING A COOLING TREND SUNDAY
AND EARLY THIS WEEK, WITH SOME COASTAL DRIZZLE. FOLLOWED BY MORE
DRY WEATHER AND WARMER TEMPERATURES RETURNING FOR THE MIDDLE OF
THE WEEK.
DISCUSSION
A 1024 MB UPPER LEVEL RIDGE CENTERED OVER THE NEPAC
REMAIN IN CONTROL OF THE NORCAL WEATHER INTO THE WEEKEND. THIS
FEATURES IS PROMOTING ABUNDANT SUNSHINE DUE TO A LARGE SCALE
SUBSIDENCE AND LIGHT TO LOCALLY BREEZY OFFSHORE FLOW THIS
AFTERNOON. THE OFFSHORE FLOW BROUGHT THE WARMEST DAY OF THE WEEK
FOR THE COAST, WITH SURFACE OBSERVATIONS REPORTING TEMPERATURES
MOSTLY IN THE 70'S INTO MID 80'S. DAYTIME INLAND TEMPERATURES HAS
BEEN RUNNING 4 TO 10 DEGREES WARMER THAN YESTERDAY'S READING, WITH
HIGHS MOSTLY IN THE 80'S. THE ASOS IN UKIAH MUNICIPAL AIRPORT
REPORTED 90F THIS AFTERNOON.
LATE TONIGHT INTO SATURDAY, THE UPPER LEVEL RIDGE IS FORECAST TO
BEGIN TO FLATTEN AS AN UPPER LEVEL TROUGH APPROACHES THE PACIFIC
NW. NBM AND HREF CONTINUE INDICATING STRATUS DEVELOPING SOUTH OF
CAPE MENDOCINO. HOWEVER, CONFIDENCE IS LOW DUE TO A PERSISTENT
LARGE SCALE SUBSIDENCE FROM THE DOMINATING RIDGE. HOWEVER, DESPITE
THIS, THE FLOW WILL BECOME MORE ZONAL AND TEMPERATURES WILL
LIKELY COOL AT AND NEAR THE COAST, WHILE STILL REMAINING MOSTLY IN
THE LOWER 60S. FARTHER INLAND, TEMPERATURES ARE FORECAST TO RUN
FEW DEGREES WARMER THAN TODAY'S READING.
SATURDAY NIGHT AND INTO SUNDAY, A TROUGH WILL MOVE CLOSER TO THE
AREA USHERING IN A DEEPER AND MORE WIDESPREAD MARINE LAYER BY SUNDAY
MORNING. DRIZZLE MAY OCCUR ALONG THE COAST, AS A RESULT.
TEMPERATURE-WISE, INLAND AREAS ARE EXPECTED TO DROP INTO THE LOW TO
MID 80S. A SHOWER OR TWO IS POSSIBLE OVER THE HIGHER TERRAIN OF
EASTERN TRINITY COUNTY. THUNDER POTENTIAL REMAINS MOSTLY AROUND A
5 TO 10 PERCENT CHANCE SO IT IS NOT REPRESENTED IN THE FORECAST,
WITH THE HIGHEST PROBABILITY OVER THE SACRAMENTO VALLEY.
INTO THE EARLY TO MIDDLE OF NEXT WEEK, HIGH PRESSURE IS EXPECTED TO
BUILD BACK IN WITH INLAND TEMPERATURES WARMING BACK INTO THE UPPER
80S AND LOW 90S AND COASTAL TEMPERATURES INTO THE MID TO UPPER
60S. BREEZY NORTH WINDS ARE EXPECTED, ALONG WITH THE POTENTIAL FOR
OFFSHORE FLOW. AND, AGAIN, THE OFFSHORE FLOW WILL HELP KEEP THE
COAST CLEARER FOR THE MIDDLE OF THE WEEK.
AVIATION
MVFR HAZE DEVELOPED BRIEFLY ALONG THE COAST THIS MORNING; AT THE
COAST POCKETS OF HAZE WILL CONTINUED INTO AFTERNOON. OTHERWISE,
MOSTLY OPTIMAL AVIATION WEATHER CONDITIONS PREVAILED ACROSS THE
REGION TODAY. OVERNIGHT/SATURDAY MORNING, SOME MODEL OUTPUTS ARE
INDICATING A CHANGE ALONG THE NORTH COAST: POCKETS OF THIN LAYER FOG
AND STRATUS CIGS TO DEVELOP AT THE COAST...ESPECIALLY AROUND
HUMBOLDT BAY AND BRIEFLY AT ACV. /TAA
MARINE
WINDS REMAIN MOSTLY NORTHERLY THROUGH THE WEEKEND,
WEAKENING OVERNIGHT AND RESTRENGTHENING TO AROUND 10 TO 15 KTS EACH
AFTERNOON. NORTHERLIES ARE FORECAST TO STRENGTHEN ONCE AGAIN LATE
THIS WEEKEND AND EARLY NEXT WEEK, WITH ANOTHER ROUND OF GALES
POSSIBLE AROUND TUESDAY. A FEW SMALL NW AND S SWELLS MOVE THROUGH
THE WATERS OVER THE NEXT WEEK, HOWEVER SEAS REMAIN PRIMARILY LOCALLY
GENERATED.
EKA WATCHES/WARNINGS/ADVISORIES
CA...
NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
NONE.
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