498
FXHW60 PHFO 051905
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
905 AM HST FRI JUN 5 2026
SYNOPSIS
BREEZY TRADE WINDS WILL PERSIST THROUGH THE WEEKEND AND AT LEAST
THE FIRST HALF OF NEXT WEEK, PUSHING SHOWERS OVER MOSTLY WINDWARD
AND MOUNTAIN AREAS.
SHORT TERM UPDATE
NO SIGNIFICANT CHANGES TO REPORT, THE FORECAST REMAINS ON TRACK.
PREV DISCUSSION
ISSUED AT 325 AM HST FRI JUN 5 2026
HIGH PRESSURE FAR NORTH OF THE ISLANDS WILL REMAIN IN PLACE
THROUGH THE FIRST HALF OF NEXT WEEK, BRINGING STABLE BREEZY TRADE
WINDS AND SHOWERS TO MAINLY WINDWARD AND MOUNTAIN AREAS. SHOWERS
WILL ALSO FAVOR THE NIGHT TIME AND EARLY MORNING HOURS, AND MINOR
FLUCTUATIONS IN COVERAGE ARE EXPECTED BASED ON PERIODIC AREAS OF
MOISTURE MOVING THROUGH WITH THE TRADES. WITH PRECIPITABLE WATER VALUES
OF AROUND 1.2 TO 1.4 INCHES, SHOWER ACTIVITY IS EXPECTED TO BE
FAIRLY TYPICAL OF THIS TIME OF YEAR.
BY THE LATER HALF OF NEXT WEEK, A FRONT PASSING BY FAR TO THE
NORTH OF THE ISLANDS COULD PUSH THE SURFACE HIGH PRESSURE EAST,
DECREASING TRADE WINDS.
AVIATION
MODERATE TO BREEZY TRADE WINDS AND ISOLATED TO SCATTERED SHOWERS
ARE EXPECTED THROUGH TODAY AND TONIGHT. SHOWERS ARE PRIMARILY
EXPECTED TO AFFECT WINDWARD AND MOUNTAIN AREAS, BUT WILL
OCCASIONALLY SPILL OVER INTO LEEWARD AREAS. MOSTLY VFR. IN THE
STRONGEST SHOWERS, THERE'S A 50% CHANCE OF BRIEF MVFR AND A 10%
CHANCE OF BRIEF IFR.
AIRMET SIERRA IS IN EFFECT FOR MOUNTAIN OBSCURATIONS ACROSS
WINDWARD AND MOUNTAIN AREAS OF OAHU. EXPECT THESE CONDITIONS
THROUGH TOMORROW DUE TO UPSTREAM AND ONGOING SHOWERS.
AIRMET TANGO IS IN EFFECT FOR MODERATE TURBULENCE BELOW 8KFT FOR
AREAS DOWNWIND OF TERRAIN DUE TO BREEZY TRADE WINDS. EXPECT THIS
TO REMAIN FOR THE NEXT COUPLE OF DAYS, AS TRADES REMAIN STEADY.
MARINE
ISSUED AT 325 AM HST FRI JUN 5 2026
FRESH TO STRONG EASTERLY TRADES WILL PREVAIL AS HIGH PRESSURE
REMAINS ANCHORED FAR NORTHEAST OF THE ISLANDS THROUGH THE WEEKEND
AND BEYOND. A SMALL CRAFT ADVISORY (SCA) REMAINS IN EFFECT FOR
THE TYPICALLY WINDIER CHANNELS AND WATERS AROUND MAUI COUNTY AND
THE BIG ISLAND, AND THIS SCA WILL LIKELY NEED TO BE EXTENDED
THROUGH AT LEAST MONDAY. TRADE WINDS MAY EASE SLIGHTLY TUESDAY AS
HIGH PRESSURE SHIFTS AWAY TO THE NORTHEAST.
THE SOUTH-SOUTHWEST SWELL THAT PRODUCED ADVISORY LEVEL SURF ALONG
SOUTH-FACING SHORES FOR THE PAST FEW DAYS WILL SLOWLY DECLINE INTO
THIS WEEKEND. NEARSHORE BUOYS EARLY THIS MORNING ARE REPORTING
THIS SWELL TO BE NEAR 3 FEET, 14 SECONDS. AS SUCH, EXPECT ELEVATED
(BUT SUB-ADVISORY LEVEL) SURF ALONG SOUTH FACING SHORES TODAY,
WHICH WILL GRADUALLY EASE OVER THE NEXT COUPLE OF DAYS. A NEW
SMALL, LONG-PERIOD SOUTH SWELL IS EXPECTED TO ARRIVE LATE SUNDAY
AND PEAK ON MONDAY.
ALONG NORTH-FACING SHORES, A SMALL, MEDIUM-PERIOD NORTH SWELL
WILL PEAK TODAY, THEN EASE OVER THE WEEKEND. A TINY WEST-NORTHWEST
SWELL IS POSSIBLE EARLY NEXT WEEK. SURF ALONG EAST-FACING SHORES
WILL GRADUALLY BUILD TO AROUND SEASONAL AVERAGE TODAY. NEAR
AVERAGE EAST SHORE SURF WILL PREVAIL THIS WEEKEND INTO EARLY NEXT
WEEK.
HFO WATCHES/WARNINGS/ADVISORIES
SMALL CRAFT ADVISORY UNTIL 6 PM HST SATURDAY FOR ALENUIHAHA
CHANNEL-BIG ISLAND LEEWARD WATERS-BIG ISLAND SOUTHEAST WATERS-
MAALAEA BAY-PAILOLO CHANNEL.
SHORT TERM UPDATE...FOSTER
PREVIOUS DISCUSSION...TSAMOUS
AVIATION...PARKER
MARINE...VAUGHAN
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