248
FXUS66 KEKA 152140
AFDEKA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
240 PM PDT SAT AUG 15 2026
KEY MESSAGES
* SMOKE SPREADING OVERNIGHT FROM LOCAL AND DISTANT WILDFIRES,
PUSHING EASTWARD DURING THE DIURNAL SWING AS WINDS PICK UP OUT
OF THE NORTH.
* COOLER TEMPERATURES AS UPPER WAVE TROUGHING PATTERN STALLS OVER
THE AREA.
SYNOPSIS
AN UPPER LEVEL TROUGHING PATTERN HAS STALLED OVER THE
GREATER PACNW. INLAND AREAS CAN EXPECT COOLER TEMPERATURES WITH
THE COAST CONTINUING TO HAVE OVERCAST CONDITIONS AND BRIEF
AFTERNOON CLEARING. GENERALLY MILD WEATHER IS EXPECTED FOR THE
NEXT WEEK.
DISCUSSION
TROUGHING CONTINUES OVER THE AREA THROUGH THE
WEEKEND AND INTO EARLY NEXT WEEK. THIS HAS SUPPORTED A MUCH DEEPER
MARINE LAYER WITH STRATUS REACHING FAR INLAND, ALONG WITH
MODERATED INTERIOR TEMPERATURES. NEAR TO BELOW NORMAL TEMPERATURES
ARE EXPECTED TO CONTINUE THROUGH MUCH OF THE WEEK AS THE
TROUGHING CONTINUES. HIGH PRESSURE MAY BRIEFLY REBUILD EARLY TO
MID WEEK, BUT MODELS ARE NOT SHOWING A SIGNIFICANT WARM UP AND
INTERIOR TEMPERATURES ARE LIKELY TO REMAIN NEAR NORMAL (WITH MOST
VALLEYS IN THE 90S). COASTAL AREAS ARE SEEING STRATUS PERSIST
THROUGH THE AFTERNOON,AND THIS IS LIKELY TO CONTINUE SO LONG AS
AFTERNOON WINDS REMAIN LIGHT. EVEN THEN, ONLY PARTIAL AFTERNOON
CLEARING IS LIKELY. ALL SAID, GENERALLY MILD, SEASONABLE WEATHER
IS EXPECTED FOR THE NEXT WEEK.
AVIATION
WITH AN EXTREMELY DEEP MARINE LAYER, CEILINGS HAVE
LIFTED DESPITE UP STREAM HIGH PRESSURE FILLING IN AFTER THE
PASSING SHORTWAVE. THE OVERALL SYNOPTIC PATTERN IS A STALLED OPEN
WAVE UPPER LEVEL TROUGH WHICH WILL CONTRIBUTE TO OVERNIGHT
OVERCASTS CONDITIONS BUT WITH THE DEEP MARINE LAYER, LIFTING
CEILINGS FAIRLY QUICKLY DURING THE DAY TIME TRANSITION. MVFR
CONDITIONS WILL SET IN AFTER 18Z OR SO FOR THE COASTAL TERMINALS,
IF THE CURRENT PATTERN PERSISTS. KUKI HAD A FEW HOURS OF IFR/LIFR
OVERNIGHT AND WITH MOISTURE AND CALM WINDS IT COULD REPEAT TONIGHT
BUT GUIDANCE HAS LOW PROBABILITY OF SUCH AN OCCURRENCE. /EYS
MARINE
NORTHERLY WINDS ARE DIMINISHING IN THE NORTHERN WATERS
WITH ISOLATED AREAS SOUTH OF CAPE MENDOCINO ACCELERATE AROUND THE
POINT THIS EVENING AT 30-33KTS. NO ADVISORIES AT THIS POINT BUT
THAT COULD CHANGE BY MID WEEK AS NORTHERLIES BUILD IN THE SOUTHERN
INNER AND OUTER WATERS. A LONG-PERIOD SOUTHERLY SWELL
OF ~3FT HAS BUILT INTO THE REGION AND WILL MIX WITH NORTHERLY
SHORTER PERIOD WAVES. HOWEVER, THE OVERALL SEA STATE SHOULD REMAIN
MIXED WITH THESE TWO WAVE GROUPS THROUGH THE START OF NEXT WEEK.
LIGHT TO MODERATELY BREEZY (~20KT) WINDS ARE EXPECTED THROUGH THE
EXTENDED FORECAST.
EKA WATCHES/WARNINGS/ADVISORIES
CA...
NONE.
NORTHWEST CALIFORNIA COASTAL WATERS...
NONE.
NOTE: THE FULL FORECAST DISCUSSION IS NOW REGULARLY ISSUED BETWEEN
10 AM/PM AND 1 PM/AM. ADDITIONAL UPDATES WILL BE ISSUED AS NEEDED.
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