Special Marine Warning Issued for Big Island Windward Waters Until 2:15 PM HST

Alert Details

The National Weather Service in Honolulu HI has issued a Special Marine Warning for the Big Island Windward Waters. The alert was issued at 12:08 PM HST on March 13, 2026, after radar indicated severe thunderstorms in the area capable of producing hazardous conditions.

Affected Areas

The warning specifically impacts the Big Island Windward Waters. Key locations and landmarks within the warning zone include:

• Hilo Harbor
• Cape Kumukahi
• FAD Buoys HK, E, D, G, SS, and KH

What You Should Do

Mariners and residents in the affected area should take the following precautions immediately:

• Seek Safe Harbor: Waterspouts can easily overturn boats and create locally hazardous seas. Move to a safe location immediately.
• Safety Onboard: If you are on a vessel, stay low or go below deck. Ensure all passengers and crew are wearing life jackets.
• Prepare for Hazards: Be ready for gusty winds, steep and fast-building seas, and blinding downpours that can significantly reduce visibility.

Expected Conditions

As of 12:07 PM HST, severe thunderstorms were located along a line moving northeast at 20 knots. The primary hazards associated with this system include:

• Waterspouts: Sudden formation of waterspouts that can overturn vessels.
• Wind: Gusts of 34 knots or greater.
• Seas: Suddenly higher waves and steep sea conditions.
• Precipitation: Blinding downpours.

Timeline

The Special Marine Warning is effective immediately as of 12:08 PM HST and is currently scheduled to expire at 2:15 PM HST on March 13, 2026.