840
FXHW60 PHFO 110151
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
351 PM HST WED SEP 10 2025
SYNOPSIS
LOCALLY BREEZY TRADES DELIVER CLOUDS AND SHOWERS WINDWARD AND
MAUKA INTO NEXT WEEK.
DISCUSSION
DIURNALLY-DRIVEN INTERIOR SHOWERS OVER KAUAI AND OAHU WILL
DISSIPATE WITH THE LOSS OF HEATING THIS EVENING. STRONG 597DM
RIDGING ANCHORED JUST WEST OF THE INTERNATIONAL DATELINE BUILDS
EAST THROUGH THE LATTER HALF OF THE WEEK ALLOWING THE TRADE WIND
BELT TO REBOUND NORTHWARD AND STRENGTHEN SLIGHTLY AS TYPICAL MID-
LEVEL STABILITY RETURNS. THIS IN TURN FAVORS A RETURN TO LOCALLY
BREEZY TRADES WHICH WILL DELIVER PERIODIC BATCHES OF CLOUDS AND
SHOWERS WINDWARD AND MAUKA THROUGH THE FORECAST PERIOD. PROSPECTS
FOR MEANINGFUL RAINFALL REMAIN LIMITED DURING THIS TIME LARGELY
OWING TO A LACK OF UPSTREAM MOISTURE.
AVIATION
AN AREA OF ENHANCED MOISTURE OVER THE WESTERN HALF OF THE STATE
HAS RESULTED IN LOWER CLOUDS, SHOWERS, AND PERIODS OF MVFR OVER
MAINLY KAUAI AND WINDWARD OAHU THIS AFTERNOON. THIS PROMPTED THE
EXPANSION OF AIRMET SIERRA FOR MOUNTIAN OBSCURATION TO THESE
AREAS, WITH CONDITIONS CONTINUING INTO THIS EVENING. OTHERWISE,
EXPECT MAINLY VFR CONDITIONS ACROSS THE REST OF THE STATE TONIGHT
AND THURSDAY WITH MODERATE TO BREEZY TRADES KEEPING CLOUDS AND
SHOWERS OVER MAINLY WINDWARD AND MAUKA AREAS.
MARINE
THE REMNANTS OF POST-TROPICAL CYCLONE KIKO CONTINUE TO TRACK
NORTHWEST THIS AFTERNOON AS IT WEAKENS JUST NORTH OF THE COASTAL
WATERS. AS THIS OCCURS, MODERATE TO LOCALLY FRESH EAST TO
SOUTHEAST TRADE WINDS HAVE BEGUN FILLING IN FROM EAST TO WEST
ACROSS THE ISLAND CHAIN TODAY. BY THURSDAY, HIGH PRESSURE WILL
BUILD NORTH OF THE COASTAL WATERS, MARKING A RETURN OF MODERATE
TO LOCALLY FRESH TRADE WINDS. BY FRIDAY, A SMALL CRAFT ADVISORY
MAY BE NEEDED ONCE AGAIN FOR THE TYPICALLY WINDY WATERS AND
CHANNELS AROUND MAUI COUNTY AND THE BIG ISLAND AS LOCALLY BREEZY
TRADES RETURN.
ANY LINGERING EASTERLY SWELL GENERATED FROM KIKO WILL FADE
TONIGHT, WITH SURF ALONG EAST-FACING SHORES RETURNING TO THE MORE
TYPICAL TRADE WIND-GENERATED ENERGY ON THURSDAY AS MODERATE TO
FRESH TRADES FILL BACK INTO THE REGION.
SURF ALONG SOUTH FACING SHORES WILL REMAIN NEAR OR JUST BELOW THE
SEPTEMBER AVERAGE FOR THE NEXT FEW DAYS. A REINFORCING SOUTH-
SOUTHWEST SWELL PEAKED TODAY AND WILL SLOWLY DECLINE THROUGH
THURSDAY. ANOTHER SMALL BUMP FROM THE SOUTH IS POSSIBLE ON
FRIDAY. ADDITIONALLY, MULTIPLE SMALL PULES OF NORTHWEST TO NORTH-
NORTHWEST SWELL ENERGY WILL GENERATE SMALL SURF ALONG NORTH FACING
BEACHES THROUGHOUT THE REST OF THIS WEEK AND INTO THE WEEKEND.
FIRE WEATHER
THE RETURN OF LOCALLY BREEZY TRADES WILL LOWER HUMIDITY TO TYPICAL
VALUES DURING THE REMAINDER OF THE FORECAST PERIOD. SHOWERS REMAIN
RATHER LIMITED AND FOCUSED WINDWARD AND MAUKA.
HFO WATCHES/WARNINGS/ADVISORIES
NONE.
DISCUSSION...JVC
AVIATION...AHUE
MARINE...VAUGHAN
FIRE WEATHER...JVC
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