Extreme · Typhoon WarningActive alert
Typhoon Warning issued October 16 at 4:51PM ChST by NWS Tiyan GU
Affecting Guam Coastal Waters; Rota Coastal Waters
In effect until: Oct 16, 2026, 9:00 PM
Guam Coastal Waters; Rota Coastal Waters
Likely impact; effects through 9:00 PM.
Prepare for the passage of a typhoon Sunday morning. Secure all vessels. Conditions are expected to be catastrophic for small craft, and extremely dangerous for any vessels of larger size. As Tropical Storm Champi approaches, stay in safe harbor.
Read the original bulletin (official text)
* WHAT....Typhoon conditions, including winds of 64 knots or more are expected. * WHERE...Guam Coastal Waters and Rota Coastal Waters. * WHEN...Onset of damaging winds beginning Saturday night. Onset of destructive winds Sunday morning. Damaging winds will continue into at least Sunday night, possibly longer if conditions warrant. * IMPACTS...Destructive winds will produce dangerous seas that could damage, capsize or sink vessels, along with drastically reducing visibilities in heavy rain. * ADDITIONAL DETAILS...Tropical Storm Champi (29W) continues to move quickly toward the Marianas. The exact path of 29W remains subject to change. However, guidance supports a passage through Guam coastal waters, with damaging winds moving in Saturday night and lasting into at least Sunday night. Champi is expected to strengthen further today and Saturday as it approaches, then move through the region as a typhoon Sunday morning. Seas will quickly rise, with significant sea heights reaching as high as 35 feet during closest passage of Champi. Dangerous sea conditions may continue into Monday.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™