Extreme · Typhoon WarningActive alert
Typhoon Warning issued October 17 at 3:37PM ChST by NWS Tiyan GU
Affecting Guam Coastal Waters; Rota Coastal Waters
In effect until: Oct 17, 2026, 1:00 PM
Guam Coastal Waters; Rota Coastal Waters
Likely impact; effects through 1:00 PM.
Prepare for the passage of a Category 3 or 4 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 Typhoon 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 and Rota Coastal Waters. * WHEN...Onset of damaging winds beginning tonight. Onset of destructive winds after midnight with typhoon force winds early Sunday morning. Damaging winds will continue into at least Sunday night, if Champi slows down. * IMPACTS...Destructive to typhoon force winds will produce dangerous to deadly seas that could damage, capsize or sink vessels, along with drastically reducing visibilities in heavy rain. * ADDITIONAL DETAILS...Typhoon 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 near the southern tip of Guam, with damaging winds moving in late tonight and lasting into at least Sunday night. Champi is expected to strengthen further today as it approaches, then move through the region as a Category 3 typhoon Sunday morning. Seas are quickly rising, with significant sea heights reaching as high as 35 feet near the eye wall of Champi. Dangerous sea conditions may continue into Monday.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™