Special Marine Warning Issued for Guam Coastal Waters Due to Potential Waterspouts
The National Weather Service has issued a Special Marine Warning for Guam coastal waters until 7:45 AM ChST as showers capable of producing waterspouts move through the region.
Alert Details
The National Weather Service in Tiyan, Guam, has issued a Special Marine Warning for the Guam coastal waters. The alert was triggered at 7:01 AM ChST on March 2, 2026, after radar indicated showers capable of producing waterspouts in the area.
Affected Areas
The warning covers the Guam Coastal Waters. Specific activity was located 10 miles northwest of Ritidian and 5 miles northeast of Ritidian at the time of issuance.
What You Should Do
Mariners are urged to seek safe harbor immediately. Waterspouts can easily overturn boats and create locally hazardous seas. The NWS advises all craft to avoid the affected waters and remain in a secure location until the warning expires.
Expected Conditions
Showers capable of producing waterspouts were detected moving southwest at 15 knots. According to the National Weather Service, these showers are expected to remain mainly over open waters. The primary hazard identified is the formation of waterspouts, which can result in sudden and dangerous sea conditions.
Timeline
The Special Marine Warning is effective as of 7:01 AM ChST and is currently set to expire at 7:45 AM ChST on March 2, 2026.
Source: NOAA Official Notice