404
FXHW60 PHFO 031904
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
904 AM HST MON AUG 3 2026
SYNOPSIS
TRADE WINDS WILL TAPER OFF THROUGH MUCH OF THIS WEEK AS REMNANTS
OF TROPICAL CYCLONE GENEVIEVE LINGER BETWEEN THE HIGH AND HAWAII.
CLOUDS AND SHOWERS WILL FAVOR WINDWARD AND MAUKA AREAS, WITH SOME
ENHANCEMENT POSSIBLE FOR THE WESTERN HALF TUESDAY THROUGH THURSDAY
DUE TO AN UPPER TROUGH SETTING UP TO THE WEST.
SHORT TERM UPDATE
THIS MORNING ON SATELLITE AND RADAR, LIGHT SHOWERS CAN BE SEEN
MOVING OVER WINDWARD AND MOUNTAIN AREAS WITH THE TRADES. THE
FORECAST REMAINS ON TRACK WITH NO UPDATES EXPECTED.
PREV DISCUSSION
ISSUED AT 300 AM HST MON AUG 3 2026
SATELLITE AND RADAR IMAGERY SHOWS SHOWERS AND LOW CLOUDS MOVING
ON THE TRADES. MOST OF THE SHOWERS ARE IMPACTING WINDWARD AND
MAUKA LOCATIONS. WIND SPEEDS WILL DECLINE TO GENTLE TO MODERATE
THROUGH MUCH OF THE WEEK AS REMNANTS OF FORMER TROPICAL CYCLONE
GENEVIEVE LINGER BETWEEN HAWAII AND THE HIGH PRESSURE SYSTEM. IT
IS NOT EXPECTED TO IMPACT HAWAII ASIDE FROM THE DECREASE IN WIND
SPEEDS.
MODEL GUIDANCE CONTINUES TO SHOW AN UPPER LEVEL TROUGH NEAR THE
WESTERN END OF THE STATE TUESDAY THROUGH THURSDAY, WHICH MAY
PROVIDE SOME ENHANCEMENT OF INCOMING TRADE WIND CLOUDS AND
SHOWERS. THIS FEATURE WILL MOVE NORTH AWAY FROM THE AREA ON
FRIDAY. MODELS ARE HINTING AT SOME INCOMING TROPICAL MOISTURE
ALONG A TROUGH CONNECTED TO THE ITCZ. TRADES WILL PUSH THIS AREA
OF MOISTURE ACROSS BIG ISLAND AND MAUI.
AVIATION
ISSUED AT 300 AM HST MON AUG 3 2026
GENERALLY VFR WITH WEAKER TRADE WINDS. OCCASIONAL MVFR CEILINGS
AND VISIBILITIES WITHIN MORE ORGANIZED SHOWERS FOCUSED OVER
WINDWARD AND UPSLOPE MAUKA EXPOSURES. NO AIRMETS CURRENTLY IN
EFFECT AND NONE EXPECTED THIS PERIOD.
MARINE
ISSUED AT 300 AM HST MON AUG 3 2026
A RIDGE OF HIGH PRESSURE NORTH OF THE STATE WILL CONTINUE TO
WEAKEN OVER THE NEXT SEVERAL DAYS AS A FRONT PASSES FAR NORTH OF
THE STATE. TRADE WIND SPEEDS WILL WEAKEN IN RESPONSE, LASTING THROUGH
THURSDAY. TRADE WINDS SHOULD RESTRENGTHEN BY THE END OF THE WEEK
AS HIGH PRESSURE BUILDS FAR NORTH OF THE STATE. THE SMALL CRAFT
ADVISORY WAS CANCELLED THIS MORNING.
SURF ALONG SOUTH FACING SHORES WILL STAY BELOW SEASONAL AVERAGES
WITH MAINLY BACKGROUND ENERGY THROUGHOUT MOST OF THIS WEEK. THE
NEXT SMALL, LONG PERIOD SOUTH SWELL WILL ARRIVE BY SATURDAY WITH A
SLIGHT BUMP IN SOUTH SHORE SURF HEIGHTS THROUGH SUNDAY. A SERIES
OF SOUTH SWELLS ARE EXPECTED THE FOLLOWING WEEK (WEEK OF AUG 9TH),
WHICH SHOULD PRODUCE SURF HEIGHTS AT OR ABOVE SEASONAL AVERAGES.
EAST FACING SHORES WILL REMAIN ROUGH AND CHOPPY WITH STEADY
DECREASING TRENDS AS THE TRADE WINDS EASE THROUGH MUCH OF THE WEEK.
SMALL, MEDIUM PERIOD EASTERLY SWELL GENERATED FROM FORMER TROPICAL
CYCLONE GENEVIEVE WILL LINGER OVER THE NEXT FEW DAYS.
SURF ALONG NORTH FACING AND WEST SHORES WILL REMAIN FLAT TO TINY
THROUGH THE FORECAST PERIOD EXCEPT FOR AREAS EXPOSED TO THE
EASTERLY TRADE WRAP.
HFO WATCHES/WARNINGS/ADVISORIES
NONE.
SHORT TERM UPDATE...TSAMOUS
DISCUSSION...WALSH
AVIATION...BLOOD
MARINE...BOHLIN
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