The National Weather Service in Honolulu issued a special marine warning for Oahu’s waters on the Windward side until 5 p.m. Saturday.
At 4:23 p.m., people reported a waterspout seven miles north of Heeia Kea small boat harbor, or about 15 miles north of Honolulu, moving west at 10 knots, or 11-and-a-half miles an hour.
Showers can produce waterspouts that can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately.
Waterspouts tend to form within long cloud lines and are most likely to form under a large cloud buildup with a dark, flat base.