600
FXHW60 PHFO 091938
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
938 AM HST TUE JUN 9 2026
SYNOPSIS
BREEZY TRADES WILL GRADUALLY WEAKEN TO MODERATE SPEEDS WEDNESDAY
THROUGH THE REST OF THE WEEK, BECOMING RELATIVELY LIGHT THIS
WEEKEND. ISOLATED TO SCATTERED SHOWERS WILL CONTINUE TO FOCUS OVER
WINDWARD AND MAUKA AREAS THROUGH WEDNESDAY. THURSDAY, LIGHTER
WINDS WILL SUPPORT SEA BREEZES EACH AFTERNOON, INCREASING CHANCES
OF CLOUDS AND SHOWERS OVER MAUKA AND INTERIOR AREAS WITH LAND
BREEZES CLEARING THESE CLOUDS AND DECREASING CHANCES OF SHOWERS
OVERNIGHT AND EARLY MORNING.
SHORT TERM UPDATE
A HIGH NORTHEAST OF STATE WILL MAINTAIN MODERATE TO BREEZY TRADES
THROUGH TODAY. A BATCH OF LOW LEVEL CLOUDS AND SHOWERS WILL
CONTINUE TO GENERATE ISOLATED TO SCATTERED SHOWERS MAINLY ALONG
WINDWARD AND MAUKA AREAS. SOME CLOUDS ARE BUILDING ALONG THE
UPSLOPE OF THE KONA COAST OF THE BIG ISLAND AS AFTERNOON
SEABREEZES DEVELOP IN THIS AREA, INCREASING THE CHANCE OF ISOLATED
SHOWERS THIS AFTERNOON.
PREV DISCUSSION
ISSUED AT 300 AM HST TUE JUN 9 2026
RADAR AND SATELLITE SHOW MOSTLY CLOUDY SKIES WITH ISOLATED
SHOWERS AT THIS TIME, MAINLY WINDWARD AND MAUKA. HIGH CLOUDS WERE
STREAMING RAPIDLY FROM WEST TO EAST OVER THE EASTERN PART OF THE
STATE. WINDS WERE AVERAGING 5 TO 15 MPH WITH GUSTS TO NEAR 20 MPH
IN THE USUALLY BREEZY SPOTS.
TRADES WILL CONTINUE AT MODERATE TO OCCASIONALLY BREEZY SPEEDS
TODAY, BUT ARE SET TO WEAKEN STARTING TOMORROW AND CONTINUE
WEAKENING INTO THE WEEKEND. A LARGE PART OF THE REASON FOR THIS
WEAKENING IS A COLD FRONT ASSOCIATED WITH AN UPPER LEVEL TROUGH.
THIS FRONT WILL MOVE SOUTHEAST TOWARD THE STATE LATE THIS WEEK,
BUT IT WON'T MAKE IT HERE. THE FRONT DRAWS CLOSEST TO THE STATE
SUNDAY (THE DAY MOST LIKELY TO GIVE US OUR WEAKEST WINDS) BUT
RECEDES BACK TO THE NORTHWEST AFTERWARD. THE PRESSURE GRADIENT
NEAR US WILL WEAKEN AS THIS FRONT GETS CLOSE, THEN STRENGTHEN
AGAIN AS IT MOVES BACK TO THE NORTHWEST. LATE THIS WEEKEND, A
SURFACE HIGH TO OUR NORTHEAST RETROGRADES WELL BACK INTO THE
PACIFIC AFTER FLIRTING WITH THE COAST OF THE MAINLAND, AND HELPS
TO INVIGORATE OUR PRESSURE GRADIENT. THIS STRONGER PRESSURE
GRADIENT WILL HELP BRING THE TRADES BACK UP NEAR MODERATE SPEED
IN ABOUT A WEEK.
AVIATION
HIGH PRESSURE NORTH OF THE ISLANDS WILL CONTINUE TO SUSTAIN
MODERATE TO BREEZY TRADE WINDS THROUGH TONIGHT. SHOWERS WILL
FOCUS OVER WINDWARD AND MOUNTAIN AREAS, OCCASIONALLY MAKING IT TO
LEEWARD AREAS. SHOWER COVERAGE WILL GENERALLY BE HIGHER DURING
THE NIGHT TIME AND EARLY MORNING HOURS. MVFR CONDITIONS ARE
EXPECTED WITHIN SHOWERS, WHILE VFR PREVAILS ELSEWHERE.
AIRMET TANGO IS IN EFFECT FOR MECHANICAL TURBULENCE DOWNWIND OF
THE MOUNTAINS DUE TO BREEZY TRADE WINDS, AND THIS IS EXPECTED TO
CONTINUE THROUGH WEDNESDAY.
MARINE
ISSUED AT 300 AM HST TUE JUN 9 2026
A HIGH PRESSURE FAR NORTHEAST OF THE ISLANDS WITH AN ASSOCIATED
RIDGE STRETCHING WEST ABOUT 600 NM NORTH OF KAUAI, IS DRIVING
FRESH TRADES ACROSS THE AREA. THIS HIGH WILL BE PUSHED EASTWARD
OVER THE NEXT SEVERAL DAYS, AND ITS ASSOCIATED RIDGE WILL BE
DISPLACED SOUTHWARD, RESULTING IN THE SLOW DECREASE IN LOCAL
TRADES. A SMALL CRAFT ADVISORY (SCA) IS IN EFFECT FOR THE
TYPICALLY WINDY WATERS AROUND BIG ISLAND AND MAUI UNTIL 6PM
TONIGHT. TRADES SHOULD BE DOWN INTO THE MODERATE TO LOCALLY FRESH
RANGE AND WILL CONTINUE TO FALL INTO THE GENTLE TO MODERATE
CATEGORY BY FRIDAY AND MAY HOLD INTO THE WEEKEND.
A SERIES OF SOUTHERN HEMISPHERE SWELLS WILL CONTINUE THROUGH THE
WEEK WITH THE LARGEST DUE TO ARRIVE THIS WEEKEND. CURRENTLY, A
BUILDING LONG-PERIOD SOUTH SWELL IS OVERLAPPING A FADING MEDIUM-
PERIOD SWELL. THE BULK OF THE NEW SWELL ENERGY WAS AIMED EAST OF
HAWAII, WHICH STILL LEAVES SOME UNCERTAINTY IN RESULTING SURF
HEIGHTS THROUGH THIS EVENING. EXPECT SOUTH SHORE SURF TO BE AROUND
SEASONAL AVERAGES TODAY, AND THEN SLOWLY DECLINING WEDNESDAY,
FOLLOWED BY A SMALLER PULSE OF SOUTH-SOUTHWEST SWELL THURSDAY AND
FRIDAY.
A MUCH LARGER SOUTH-SOUTHWEST SWELL WILL ARRIVE SATURDAY NIGHT
AND SUNDAY. A STORM JUST SOUTHEAST OF NEW ZEALAND IS PRODUCING A
FETCH OF SEAS IN EXCESS OF 40 FEET AIMED AT HAWAII, AND THERE IS
GROWING CONFIDENCE THAT SOUTH SHORE SURF WILL WELL EXCEED HIGH
SURF ADVISORY LEVELS DURING THE PEAK SUNDAY INTO EARLY NEXT WEEK,
WITH HIGH SURF WARNING CONDITIONS POSSIBLE. THIS SWELL WILL
COINCIDE WITH THE PEAK MONTHLY TIDES AND WILL LIKELY LEAD TO
SIGNIFICANT WAVE RUNUP AND IMPACTS TO COASTAL INFRASTRUCTURE.
SMALL WEST-NORTHWEST IS POSSIBLE OVER THE NEXT FEW DAYS, WHILE
ROUGH EAST SHORE SURF SLOWLY DECLINES BELOW SEASONAL AVERAGES.
HFO WATCHES/WARNINGS/ADVISORIES
SMALL CRAFT ADVISORY UNTIL 6 PM HST THIS EVENING FOR ALENUIHAHA
CHANNEL-BIG ISLAND LEEWARD WATERS-BIG ISLAND SOUTHEAST WATERS-
MAALAEA BAY-PAILOLO CHANNEL.
SHORT TERM UPDATE...ALMANZA
DISCUSSION...PARKER
AVIATION...EVANS
MARINE...WALSH
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