844  
WHHW40 PHFO 220121  
CFWHFO  
 
COASTAL HAZARD MESSAGE  
NATIONAL WEATHER SERVICE HONOLULU HI  
321 PM HST THU AUG 21 2025  
 
...MINOR COASTAL FLOODING DURING THE HIGH TIDE THROUGH FRIDAY  
AFTERNOON FOR LOW LYING COASTAL AREAS OF ALL ISLANDS...  
 
PEAK HIGH TIDES ASSOCIATED WITH THE LUNAR CYCLE WILL LEAD TO  
MINOR COASTAL FLOODING ALONG SHORELINES AND LOW LYING COASTAL  
THROUGH FRIDAY AFTERNOON. COASTAL FLOODING IS POSSIBLE AROUND THE  
DAILY PEAK TIDE, WHICH WILL BE DURING THE AFTERNOON HOURS.  
 
HIZ001-003-006-007-009-016>018-023-026-029>035-037>054-221430-  
/O.EXT.PHFO.CF.S.0004.000000T0000Z-250823T0400Z/  
NIIHAU-KAUAI SOUTHWEST-WAIANAE COAST-OAHU NORTH SHORE-OLOMANA-  
KAHOOLAWE-MAUI WINDWARD WEST-MAUI LEEWARD WEST-KONA-KOHALA-  
KAUAI NORTH-KAUAI EAST-KAUAI SOUTH-EAST HONOLULU-HONOLULU METRO-  
EWA PLAIN-KOOLAU WINDWARD-MOLOKAI WINDWARD-MOLOKAI SOUTHEAST-  
MOLOKAI NORTH-MOLOKAI WEST-MOLOKAI LEEWARD SOUTH-LANAI WINDWARD-  
LANAI LEEWARD-LANAI SOUTH-MAUI CENTRAL VALLEY NORTH-  
MAUI CENTRAL VALLEY SOUTH-WINDWARD HALEAKALA-KIPAHULU-  
SOUTH MAUI/UPCOUNTRY-SOUTH HALEAKALA-BIG ISLAND SOUTH-  
BIG ISLAND SOUTHEAST-BIG ISLAND EAST-BIG ISLAND NORTH-  
321 PM HST THU AUG 21 2025  
 
...COASTAL FLOOD STATEMENT NOW IN EFFECT THROUGH FRIDAY  
AFTERNOON...  
 
* WHAT...ISOLATED MINOR COASTAL FLOODING.  
 
* WHERE...LOW LYING COASTAL AREAS OF ALL HAWAIIAN ISLANDS.  
 
* WHEN...DURING THE DAILY PEAK TIDES EACH AFTERNOON THROUGH  
FRIDAY.  
 
* IMPACTS...FLOODING OF BEACHES THAT ARE NORMALLY DRY, MINOR  
COASTAL EROSION, AND SALTWATER INUNDATION.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
AVOID DRIVING THROUGH FLOODED ROADWAYS. IF YOU ARE FORCED TO  
DRIVE THROUGH SALT WATER, BE SURE TO RINSE YOUR VEHICLE WITH  
FRESH WATER. MOVE ELECTRONICS, VEHICLES OR OTHER VALUABLES TO  
HIGHER GROUND. MONITOR VESSELS TO ENSURE MOORING LINES DON'T GET  
TOO TIGHT AND WATCH OUT FOR OVERWASH AROUND BOAT RAMPS. SECURE  
CANOES OR OTHER WATERCRAFT STOWED ON BEACHES.  
 

 
 
SUBMIT YOUR COASTAL FLOODING PHOTOS TO THE UNIVERSITY OF HAWAII  
SEA GRANT COLLEGE PROGRAM'S HAWAII AND PACIFIC ISLANDS KING  
TIDES PROJECT AT:  
 
PACIFICISLANDSKINGTIDES.ORG  
 

 
 
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