969
FXHW60 PHFO 050623
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
823 PM HST THU JUN 4 2026
SYNOPSIS
BREEZY TRADES DELIVER SHOWERS WINDWARD AND MAUKA THROUGH THE
FORECAST PERIOD.
SHORT TERM UPDATE
NO SIGNIFICANT CHANGES TO REPORT, THE FORECAST REMAINS ON TRACK.
PREV DISCUSSION
ISSUED AT 301 PM HST THU JUN 4 2026
A BATCH OF MOISTURE ADVANCING THROUGH THE ISLAND CHAIN TODAY HAS
RATHER EFFICIENTLY PRODUCED NUMEROUS SHOWERS WINDWARD AND MAUKA,
EVEN DURING THE UNFAVORABLE PEAK HEATING PERIOD AND BENEATH
BUILDING SUBSIDENCE ASSOCIATED WITH 500MB HEIGHT RISES TO 590+DM. BREEZY
TRADES WILL DELIVER SOME OF THE TALLER SHOWERS TO LEEWARD ZONES
THROUGH LATE AFTERNOON. SATELLITE TRENDS SUGGEST THIS ACTIVITY
WILL SHIFT WEST OF THE AREA BY LATE THIS EVENING. VERY LITTLE
CHANGE GOING FORWARD AS A SEASONALLY STABLE AND BENIGN TRADE WIND
PATTERN PERSISTS WELL INTO NEXT WEEK.
AVIATION
MODERATE TO BREEZY TRADE WINDS WITH EMBEDDED SHOWERS ARE EXPECTED
THROUGH TOMORROW. SHOWERS ARE PRIMARILY AFFECTING WINDWARD AND
MOUNTAIN AREAS, BUT ARE CAPABLE OF SPILLING OVER INTO LEEWARD
AREAS AS WELL. EXPECT MVFR TO EVEN BRIEF IFR CONDITIONS WITHIN
SHOWERS, AND VFR ELSEWHERE.
AIRMET SIERRA IS IN EFFECT FOR MOUNTAIN OBSCURATIONS ACROSS
WINDWARD AND MOUNTAIN AREAS FROM KAUAI TO MAUI. EXPECT THESE
CONDITIONS TO GENERALLY PREVAIL 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
FRESH TO STRONG EASTERLY TRADES WILL PREVAIL AS HIGH PRESSURE
REMAINS ANCHORED FAR NORTHEAST OF THE ISLANDS THROUGH THE WEEKEND.
A SMALL CRAFT ADVISORY (SCA) FOR THE TYPICALLY WINDIER CHANNELS
AND WATERS AROUND MAUI COUNTY AND THE BIG ISLAND REMAINS IN EFFECT
THROUGH SATURDAY AND WILL LIKELY BE EXTENDED THROUGH AT LEAST
MONDAY. TRADES 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 HAS BEGUN TO SLOWLY
DECLINE. THIS EVENING, NEARSHORE BUOYS SHOW THAT THE SWELL HAS
COME DOWN SLIGHTLY TO 3 TO 4 FEET, 15 SECONDS. THIS TREND IS
EXPECTED TO CONTINUE, WITH SURF GRADUALLY EASING THROUGH FRIDAY
AND THE WEEKEND. THEREFORE, THE HIGH SURF ADVISORY HAS BEEN
CANCELLED. A SMALL, LONG-PERIOD SOUTH-SOUTHWEST SWELL IS EXPECTED
TO ARRIVE LATE SUNDAY AND PEAK EARLY NEXT WEEK.
ALONG NORTH-FACING SHORES, A SMALL MEDIUM-PERIOD NORTH SWELL WILL
BUILD TONIGHT AND IS FORECAST TO PEAK EARLY FRIDAY, 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 BY FRIDAY, THOUGH SOME AREAS EXPOSED TO
WRAPPING NORTH SWELL COULD BE SLIGHTLY LARGER THURSDAY NIGHT AND
FRIDAY. 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.
DISCUSSION...JVC
AVIATION...EVANS
MARINE...VAUGHAN
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page