Special Marine Warning Issued for Big Island Windward and Southeast Waters Until 6:15 AM HST

Alert Details

The National Weather Service in Honolulu has issued a Special Marine Warning (VTEC code /O.NEW.PHFO.MA.W.0045.260315T1409Z-260315T1615Z/) for marine areas surrounding the Big Island. The alert was issued at 4:09 AM HST on March 15, 2026, following radar detection of severe weather conditions.

Affected Areas

The warning specifically covers the following geographic regions:

• Big Island Southeast Waters
• Big Island Windward Waters

At 4:08 AM HST, a line of severe thunderstorms was located approximately 21 nautical miles southeast of FAD Buoy KH, or 25 nautical miles southeast of Isaac Hale Beach Park, moving northeast at 35 knots.

What You Should Do

Mariners and residents in the affected areas should take immediate precautions:

• Seek Safe Harbor: Move to a safe location immediately.
• Safety Gear: Ensure all persons on board are wearing life jackets.
• Protective Action: Stay low or go below deck to avoid hazards.
• Monitor Conditions: Prepare for sudden changes in sea state and visibility.

Expected Conditions

According to the National Weather Service, the following hazards are expected:

• Waterspouts: Thunderstorms in the area are capable of producing sudden waterspouts which can easily overturn boats.
• Wind: Wind gusts of nearly 50 knots are possible.
• Seas: Expect steep and fast-building seas that can damage small craft.
• Visibility: Blinding downpours are likely as the storm line passes.

Timeline

The Special Marine Warning is effective immediately and is currently scheduled to expire at 6:15 AM HST on March 15, 2026. The severe thunderstorms are expected to remain primarily over open waters during this window.