Extreme · Typhoon WarningActive alert
Typhoon Warning issued October 18 at 12:31PM ChST by NWS Tiyan GU
Affecting Guam Coastal Waters; Rota Coastal Waters
In effect until: Oct 18, 2026, 4:45 PM
Guam Coastal Waters; Rota Coastal Waters
Likely impact; effects through 4:45 PM.
Conditions will remain catastrophic for small craft, and extremely dangerous for any vessels of larger size over western waters of Guam and Rota. Waters will remain hazardous across the remainder of the waters. Stay in safe harbor until the all clear is given.
Read the original bulletin (official text)
* WHAT...Typhoon conditions, including winds of 64 knots or more will continue for Guam. Tropical storm conditions will continue for Rota. * WHERE...Guam and Rota Coastal Waters. * WHEN...Destructive typhoon force winds are occurring in western waters of Guam, but will decrease as Champi moves farther west away from the Marianas. The eye of Champi is now well outside of the coastal waters to the west. Damaging winds will continue through today. * IMPACTS...Destructive typhoon force and tropical storm 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...Super Typhoon Champi (29W) continues to move quickly away from the Marianas as a Category 4 Super Typhoon. Seas are expected to remain hazardous through tonight, with significant sea heights as high as 24 feet over Guam coastal waters and 20 feet over Rota coastal waters. Dangerous sea conditions may continue into Monday.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™