940
FXUS66 KEKA 232141
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
241 PM PDT TUE JUL 23 2019
SYNOPSIS
WARM AND DRY CONDITIONS WILL CONTINUE DURING THE
FORESEEABLE FUTURE ACROSS THE INTERIOR. MEANWHILE, COASTAL AREAS
WILL EXPERIENCE PERIODS OF OVERNIGHT AND MORNING MARINE CLOUDS
FOLLOWED BY CLEARING DURING THE AFTERNOONS.
DISCUSSION
MODEL GUIDANCE INDICATES THE UPPER HEIGHT PATTERN
WILL EVOLVE TOWARDS A SLIGHTLY LESS AMPLIFIED CONFIGURATION
DURING THE NEXT SEVEN DAYS. IN THE LOW-LEVELS, A THERMALLY INDUCED
AREA OF LOWER 850 MB HEIGHTS IS FORECAST TO DEVELOP OVER THE
ENTIRE NWRN CA COAST DURING WEDNESDAY, AND THEN REPOSITION SOUTH
OF THE REGION DURING LATE WEEK. HOT TEMPERATURES WILL DEVELOP
ACROSS THE INTERIOR AS A RESULT, WITH HIGHS GENERALLY IN THE MID
90S TO AROUND 100. NEAR THE COAST, MAINLY SUNNY CONDITIONS APPEAR
PROBABLE DURING WEDNESDAY DUE TO A SLIGHT OFFSHORE COMPONENT IN
BOUNDARY LAYER FLOW. SUNSHINE SHOULD YIELD WARMER TEMPERATURES IN
THE MID/UPPER 60S TO LOW 70S. AS THE 850 MB THERMAL LOW SHIFTS
SOUTH WITH TIME, STRATUS WILL LIKELY RETURN TO THE COAST AND AID
IN SLIGHTLY COOLER HIGHS.
OTHERWISE, NO PRECIPITATION IS EXPECTED THROUGHOUT THE SHORT AND
LONG TERM FORECAST PERIODS.
AVIATION
A NARROW STRIP OF MARINE STRATUS PERSISTS ALONG THE
HUMBOLDT AND DEL NORTE COUNTY COASTS TUESDAY AFTERNOON. HOWEVER,
BOUNDARY LAYER FLOW IS FORECAST TO TAKE ON AN OFFSHORE COMPONENT
TONIGHT WHICH SHOULD AID IN CLEARING STRATUS AWAY FROM KCEC.
MEANWHILE, STRATUS AND IFR CEILINGS WILL BE LIKELY AT KACV LATE
TONIGHT...BUT HERE TOO STRATUS SHOULD QUICKLY DISSIPATE LATE
WEDNESDAY MORNING INTO THE AFTERNOON AS WARM OFFSHORE FLOW
DEVELOPS IMMEDIATELY ABOVE THE SURFACE. FARTHER INLAND, VFR
CONDITIONS WILL PREVAIL ACROSS THE INTERIOR DURING THE NEXT 24
HOURS.
MARINE
THINKING IS RELATIVELY UNCHANGED THIS AFTERNOON WITH
REGARDS TO THE MARINE FORECAST. THE SOUTHERN OUTER WATERS WILL
CONTINUE WITH PERSISTENT SMALL CRAFT ADVISORY CONDITIONS THROUGH
MID WEEK. MODEL GUIDANCE ALSO INDICATES SOME STRONGER WINDS ARE
POSSIBLE AROUND CAPE MENDOCINO AS AN EXPANSION JET DEVELOPS,
LEADING TO GUSTS TO 35 KTS NEAR AND DOWNWIND OF THE CAPE THIS
AFTERNOON. MOST OF THE SOUTHERN INNER WATERS WILL BE SPARED FROM
THE JET THEREFORE HAVE HELD OFF ON ISSUING A SHORT TERM SMALL
CRAFT ADVISORY FOR THE SOUTHERN INNER WATERS. A TIGHTENING SURFACE
PRESSURE GRADIENT WILL AID IN INCREASING NORTHERLIES BY MID TO
LATE WEEK ACROSS ALL OF THE WATERS, WITH OCCASIONAL GUSTS FROM 30
TO 35 KT POSSIBLE OVER THE OUTER WATERS. IN ADDITION, STEEP
HAZARDOUS SEAS FROM 9 TO 12 FEET WILL BE LIKELY OVER THE OUTER
WATERS, WITH SEAS FROM 6 TO 8 FEET EXPECTED ACROSS THE NORTHERN
INNER WATERS AS WELL AS LOCATIONS IN THE VICINITY OF CAPE
MENDOCINO. /WCI/TDJ
EKA WATCHES/WARNINGS/ADVISORIES
CA...NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...GALE WATCH FROM WEDNESDAY
AFTERNOON THROUGH THURSDAY MORNING FOR PZZ470.
SMALL CRAFT ADVISORY FROM 9 PM THIS EVENING TO 3 PM PDT
WEDNESDAY FOR PZZ470.
SMALL CRAFT ADVISORY UNTIL 3 AM PDT FRIDAY FOR PZZ475.
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