Special Marine Warning Issued for Alenuihaha Channel Due to Waterspout Threat

Alert Details

The National Weather Service in Honolulu has issued a Special Marine Warning for the Alenuihaha Channel. This alert was issued at 11:26 AM HST on March 13, 2026, following radar detection of a severe thunderstorm in the region.

Affected Areas

The warning specifically covers the Alenuihaha Channel. Impacted locations include Upolu Point and several offshore markers, specifically FAD Buoy M, FAD Buoy HS, FAD Buoy JJ, FAD Buoy GG, and FAD Buoy Nl.

What You Should Do

Mariners are advised to seek safe harbor immediately. Those on the water should prepare for gusty winds, steep and fast-building seas, and blinding downpours. It is recommended to stay low or go below deck, and ensure all passengers are wearing life jackets. Because frequent lightning is occurring, individuals should stay below deck if possible. Waterspouts can develop suddenly and easily overturn boats; immediate action is required to ensure safety.

Expected Conditions

According to radar data, a severe thunderstorm was located 36 nautical miles southwest of FAD Buoy JJ (or 40 nautical miles south of Honokanaia) at 11:25 AM HST, moving northeast at 20 knots. The primary hazards include waterspouts and wind gusts reaching up to 40 knots. These conditions are expected to create locally hazardous seas and could damage small craft.

Timeline

The Special Marine Warning is effective immediately and is scheduled to remain in place until 1:30 PM HST on March 13, 2026.