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whhw40 phfo 120138

coastal hazard message
national weather service honolulu hi
338 pm hst wed dec 11 2019

...large northwest swell will spread across island waters 
into thursday... 
...high surf warning for north and west facing shores of niihau 
kauai oahu molokai and north facing shores of maui...

.a northwest swell will continue to build, leading to warning 
level surf along most north and west facing shores from kauai to 
maui through thursday.

niihau-kauai windward-kauai leeward-waianae coast-
oahu north shore-oahu koolau-olomana-molokai windward-
molokai leeward-maui windward west-maui central valley-
windward haleakala-
338 pm hst wed dec 11 2019

...high surf warning remains in effect until 6 pm hst thursday...

* what...surf along north and west facing shores of niihau and
  kauai, and north facing shores of oahu, molokai, and maui will
  build to 18 to 25 feet tonight, then increase to 25 to 30 feet
  on thursday. surf along west facing shores of oahu and molokai
  will build to 15 to 18 feet tonight, then increase to 15 to 20
  feet on thursday.

* where...north and west facing shores of niihau, kauai, oahu, 
  molokai, and north facing shores of maui.

* when...until 6 pm hst thursday.

* impacts...high. expect ocean water occasionally sweeping 
  across portions of beaches, very strong breaking waves, and 
  strong longshore and rip currents. breaking waves may 
  occasionally impact harbors making navigating the harbor 
  channel dangerous.

precautionary/preparedness actions...

large, breaking surf, significant shorebreak, and dangerous
currents make entering the water very hazardous.

anyone entering the water could face significant injury or death.



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