The Offshore Waters Forecast for Hawai`i.

Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

517 FZHW60 PHFO 221505 OFFHFO Offshore Waters Forecast for Hawaii National Weather Service Honolulu HI 505 AM HST Sun Mar 22 2026 Hawaiian offshore waters beyond 40 nautical miles out to 240 nautical miles including the portion of the Papahanaumokuakea Marine National Monument east of French Frigate Shoals Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. PHZ105-222215- 505 AM HST Sun Mar 22 2026 .Synopsis for the Hawaiian offshore waters... A surface low is located north of the region with a pair of troughs draped over the offshore. Bands of heavy showers and thunderstorms will continue to move over the offshore waters into Sunday. The low will lift northeast of the region on Sunday, and strong high pressure will build far north of the islands Monday and Tuesday. $$ PHZ180-222215- Hawaiian Offshore Waters- 505 AM HST Sun Mar 22 2026 .TODAY...N winds 10 to 20 kt NW Half, S up to 10 kt SE Half. Seas 6 to 9 ft. Isolated thunderstorms. .TONIGHT THROUGH MONDAY...NE winds 10 to 20 kt. Seas 6 to 9 ft. Isolated thunderstorms. .TUESDAY THROUGH FRIDAY...NE winds 15 to 25 kt. Seas 6 to 9 ft. Isolated thunderstorms E of 160W on Tuesday. $$