674
FXHW60 PHFO 030625
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
825 PM HST SUN AUG 2 2026
SYNOPSIS
HIGH PRESSURE FAR NORTHEAST WILL DRIVE TRADE WINDS TONIGHT. WIND
SPEEDS 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
MINOR CHANGES TO POPS AND SKY, OTHERWISE PREVIOUS FORECAST IS ON
TRACK.
AVIATION
GENERALLY VFR WITH WEAKENING 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
A RIDGE OF HIGH PRESSURE NORTH OF THE STATE WILL WEAKEN TONIGHT
AS A FRONT PASSES FAR NORTH OF THE STATE. THIS WILL ALLOW THE
TRADE WINDS TO STEADILY WEAKEN THROUGH TUESDAY. WINDS SHOULD
DECREASE BELOW SMALL CRAFT ADVISORY THRESHOLDS BY MONDAY. THE
CURRENT SCA IS FOR THE WINDIER WATERS AROUND MAUI COUNTY AND THE
BIG ISLAND THROUGH TONIGHT. TRADE WINDS SHOULD RESTRENGTHEN BY THE
END OF THE WEEK AS A STRONG HIGH REBUILDS FAR NORTHEAST OF THE
STATE.
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 NEXT WEEKEND.
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 THROUGH TONIGHT,
BUT SHOULD SEE A STEADY DECREASE AS THE TRADE WINDS WEAKEN INTO
MONDAY. SMALL, MEDIUM PERIOD EASTERLY SWELL GENERATED FROM
FORMER TC 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.
FIRE WEATHER
HIGH PRESSURE FAR NORTHEAST WILL DRIVE TRADE WINDS TONIGHT. WIND
SPEEDS 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. INVERSION OVER
HAWAII WILL BE BETWEEN 6000 AND 7000 FEET.
HFO WATCHES/WARNINGS/ADVISORIES
SMALL CRAFT ADVISORY UNTIL 6 AM HST MONDAY FOR ALENUIHAHA
CHANNEL-BIG ISLAND LEEWARD WATERS-BIG ISLAND SOUTHEAST WATERS-
MAALAEA BAY-PAILOLO CHANNEL.
UPDATE...WALSH
DISCUSSION...FOSTER
AVIATION...BLOOD
MARINE...BOHLIN
FIRE...FOSTER
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