High Surf Warning issued April 5 at 3:22PM HST until April 6 at 6:00PM HST by NWS Honolulu HI

...HIGH SURF WARNING FOR NORTH AND EAST FACING SHORES OF NIIHAU
KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND...
...HIGH SURF ADVISORY FOR WEST FACING SHORES OF KAUAI OAHU
MOLOKAI AND MAUI...

.An extra large, long period north swell (340-360 degrees) will
peak tonight and Sunday, producing warning level surf along north
and exposed east facing shores and advisory level surf for most
west facing shores. The swell will steadily decline late Sunday
and Monday.

* WHAT...Along north facing shores, surf building to 25 to 35 feet
tonight, lowering to 20 to 25 feet Sunday. Along east facing
shores, surf building to 14 to 18 feet tonight, lowering to 10
to 15 feet Sunday.

* WHERE...North and east facing shores of Kauai, Maui, Molokai,
Niihau, Oahu and the Big Island.

* WHEN...Until 6 PM HST Sunday.

* IMPACTS...High. Expect very strong breaking waves and powerful
currents. Waves breaking in channel entrances may make
navigating the channels dangerous.

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.