Super Typhoon Sinlaku is barreling toward U.S. islands in the western Pacific, threatening destructive winds, torrential rain and dangerous surf as it lines up a close pass at the Marianas late Monday into Tuesday. Communities from Rota and Tinian to Saipan and Guam have shifted into full emergency mode, with shelters opening and many public offices closed ahead of the storm.
Storm strength and forecast
Satellite estimates and computer models show Sinlaku at super-typhoon strength, packing sustained winds near 180 mph and gusts reportedly reaching 220 mph, according to the San Francisco Chronicle. The storm’s cloud shield could stretch roughly 400 miles across, so intense rain bands are expected to soak areas far from the eye. Some forecast guidance keeps a direct hit over Tinian and Saipan, while other runs tug the core slightly north; forecasters stress that a small track wobble will determine which islands end up in the eyewall.
Watches, closures and travel disruptions
Typhoon warnings are posted for Rota, Tinian and Saipan, and Guam is under a tropical-storm warning. Schools and government offices across the islands have been shut down and emergency shelters opened, as reported by NMI News Service. Local officials shared shelter occupancy updates Sunday and urged residents to secure loose items, safeguard homes and prepare for extended power and communications outages. The Commonwealth Ports Authority said airports technically remain open, but a wave of cancellations has effectively wiped out most service through at least April 14.
Rain, surge and surf
The National Weather Service has placed Guam, Rota, Saipan and Tinian under a Flash Flood Watch, and government bulletins warn that some locations near the storm’s center could pick up 15–20 inches of rain, with lower but still hazardous totals expected elsewhere, according to the Government of Guam Joint Information Center. Forecasters are also flagging dangerous surf and storm surge, with exposed reefs potentially seeing waves near 15 feet, along with coastal inundation and beach erosion that could linger into the second half of the week, per the San Francisco Chronicle.
Ports, flights and military precautions
The U.S. Coast Guard has moved cutters out of Apra Harbor to be ready for potential search-and-rescue operations, and military installations have scaled back nonessential services ahead of Sinlaku, as reported by the AP. CNMI seaports were placed in Port Heavy Weather Condition Yankee, which bars vessels from entering, and officials urged residents to follow local guidance carefully, per NMI News Service. With schedules in flux, travelers are advised to check directly with airlines and shippers for waivers, cancellations and rebooking options.
What to watch and where to get updates
Forecast uncertainty remains a big storyline. Even small north-south shifts in Sinlaku’s track could be the difference between eyewall conditions and more distant outer-band impacts, and model spreads still show the potential for major wind and rain damage somewhere in the Marianas, according to AccuWeather. For official watches, evacuation notices and shelter information, residents should monitor the National Weather Service Guam and the Government of Guam Joint Information Center. This page will be updated as new official briefings are released.
