042
WHHW40 PHFO 080151
CFWHFO
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE HONOLULU HI
351 PM HST MON SEP 7 2026
...HIGH SURF WARNING FOR SOUTH FACING SHORES OF ALL ISLANDS
THROUGH TUESDAY...
...HIGH SURF WARNING FOR WEST FACING SHORES OF BIG ISLAND THROUGH
TUESDAY...
...HIGH SURF ADVISORY FOR EAST FACING SHORES OF ALL ISLANDS
THROUGH TUESDAY...
.SOUTH-SOUTHWEST SWELL FROM HURRICANE LOWELL WILL CONTINUE TO BUILD
RAPIDLY, AND PEAK TONIGHT AS IT SHIFTS OUT OF THE SOUTHWEST. AS A
RESULT, WARNING LEVEL SURF ALONG SOUTH FACING SHORES WILL CONTINUE
TO RISE, PEAKING OVERNIGHT. DUE TO THE TRACK OF LOWELL WEST OF
THE MAIN ISLANDS, A SHARP GRADIENT IN SWELL IS EXPECTED FROM WEST
TO EAST. THIS WILL BRING DAMAGING SURF TO PORTIONS OF KAUAI COUNTY
AND LIKELY OAHU, WITH THE POTENTIAL FOR SIGNIFICANT DAMAGE TO
COASTAL PROPERTIES AND INFRASTRUCTURE, PARTICULARLY TO THOSE AREAS
ALONG THE COASTS OF KAUAI AND OAHU EXPOSED TO THE SOUTHERLY SWELL.
THE HURRICANE SWELL ENERGY IS EXPECTED TO RAPIDLY DECLINE ON
TUESDAY AS LOWELL MOVES AWAY FROM THE ISLANDS.
A LARGE, MEDIUM-PERIOD EAST SWELL FROM FORMER TROPICAL STORM
KARINA WILL COMBINE WITH INCREASING EAST TO SOUTHEAST WIND WAVE
GENERATED BY HURRICANE LOWELL TO KEEP ADVISORY LEVEL SURF ALONG
EAST FACING SHORES THROUGH TUESDAY.
HIZ001-003-031-081500-
/O.CON.PHFO.SU.W.0011.000000T0000Z-260909T0400Z/
NIIHAU-KAUAI SOUTHWEST-KAUAI SOUTH-
351 PM HST MON SEP 7 2026
..HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM HST TUESDAY
* WHAT...SURF WILL CONTINUE TO RAPIDLY BUILD TO 20 TO 30 FEET,
PEAKING OVERNIGHT.
* WHERE...SOUTH FACING SHORES OF KAUAI AND NIIHAU.
* WHEN...UNTIL 6 PM HST TUESDAY.
* IMPACTS...EXTREME...EXPECT OCEAN WATER SURGING AND SWEEPING
OVER BEACHES, COASTAL BENCHES, AND ROADWAYS, CREATING THE
POTENTIAL FOR SIGNIFICANT DAMAGE TO COASTAL PROPERTIES AND
INFRASTRUCTURE, INCLUDING ROADWAYS. COASTAL EVACUATIONS AND
ROAD CLOSURES ARE POSSIBLE. LARGE BREAKING WAVES MAY AFFECT
HARBOR ENTRANCES AND CHANNELS WITH SIGNIFICANT DAMAGE POSSIBLE
TO DOCKS, PIERS, RAMPS, AND BOATS.
* ADDITIONAL DETAILS...VULNERABLE COASTAL ROADWAYS FROM POIPU TO
KEKAHA ARE SUSCEPTIBLE TO OVERWASH, WITH LAWAI ROAD AT A
PARTICULAR RISK FOR OVERWASH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
STAY AWAY FROM THE SHORELINE ALONG THE AFFECTED COASTS. BE
PREPARED FOR ROAD CLOSURES. POSTPONE ENTERING OR LEAVING CHANNELS
AFFECTED BY THE HIGH SURF UNTIL THE SURF SUBSIDES.
HIZ006-016-018-023-026-032>034-038-040-041-043-044-046-048>052-
081500-
/O.CON.PHFO.SU.W.0011.000000T0000Z-260909T0400Z/
WAIANAE COAST-KAHOOLAWE-MAUI LEEWARD WEST-KONA-KOHALA-
EAST HONOLULU-HONOLULU METRO-EWA PLAIN-MOLOKAI SOUTHEAST-
MOLOKAI WEST-MOLOKAI LEEWARD SOUTH-LANAI LEEWARD-LANAI SOUTH-
MAUI CENTRAL VALLEY SOUTH-KIPAHULU-SOUTH MAUI/UPCOUNTRY-
SOUTH HALEAKALA-BIG ISLAND SOUTH-BIG ISLAND SOUTHEAST-
351 PM HST MON SEP 7 2026
..HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM HST TUESDAY
* WHAT...FOR SOUTH FACING SHORES, SURF WILL CONTINUE TO RAPIDLY
BUILD TO 15 TO 25 FEET FOR OAHU, 12 TO 20 FEET FOR MAUI COUNTY,
AND 12 TO 16 FEET FOR THE BIG ISLAND. FOR WEST FACING SHORES OF
THE BIG ISLAND, SURF BUILDING TO 12 TO 16 FEET. SURF IS EXPECTED
TO PEAK OVERNIGHT.
* WHERE...SOUTH FACING SHORES OF KAHOOLAWE, LANAI, MAUI,
MOLOKAI, OAHU AND THE BIG ISLAND. WEST FACING SHORES OF THE
BIG ISLAND.
* WHEN...UNTIL 6 PM HST TUESDAY.
* IMPACTS...VERY HIGH...EXPECT OCEAN WATER SURGING AND SWEEPING
ACROSS BEACHES, COASTAL BENCHES, AND LAVA FLOWS CREATING THE
POTENTIAL FOR IMPACTS TO COASTAL PROPERTIES AND
INFRASTRUCTURE, INCLUDING ROADWAYS. POWERFUL LONGSHORE AND RIP
CURRENTS WILL BE PRESENT AT MOST BEACHES. LARGE BREAKING WAVES
AND STRONG CURRENTS MAY IMPACT HARBOR ENTRANCES AND CHANNELS
CAUSING CHALLENGING BOAT HANDLING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
STAY AWAY FROM THE SHORELINE ALONG THE AFFECTED COASTS. BE
PREPARED FOR ROAD CLOSURES. POSTPONE ENTERING OR LEAVING CHANNELS
AFFECTED BY THE HIGH SURF UNTIL THE SURF SUBSIDES.
HIZ009-030-035-037-047-053-054-081500-
/O.CON.PHFO.SU.Y.0036.000000T0000Z-260909T0400Z/
OLOMANA-KAUAI EAST-KOOLAU WINDWARD-MOLOKAI WINDWARD-
WINDWARD HALEAKALA-BIG ISLAND EAST-BIG ISLAND NORTH-
351 PM HST MON SEP 7 2026
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST TUESDAY
* WHAT...SURF OF 7 TO 10 FEET.
* WHERE...EAST FACING SHORES OF OAHU, MOLOKAI, MAUI, AND BIG
ISLAND.
* WHEN...UNTIL 6 PM HST TUESDAY.
* IMPACTS...MODERATE. STRONG BREAKING WAVES AND STRONG CURRENTS
WILL MAKE SWIMMING DANGEROUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEED ALL ADVICE FROM OCEAN SAFETY OFFICIALS. WHEN IN DOUBT, DON'T
GO OUT.
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