A designated tropical cyclone in the Northwestern Pacific Ocean, Tropical Storm Sinlaku (04W), currently intensifying southeast of Guam as of April 2026, forecasted to reach typhoon strength with damaging winds impacting the U.S. territory.

A meteorological event tracked by the Joint Typhoon Warning Center, expected to bring sustained winds over 39 mph to Guam starting Monday, potentially escalating to Category 3 or 4 typhoon conditions with prolonged gusts.

The early 2026 Western Pacific storm season's first major system, positioned nearly stationary northwest of Chuuk, moving toward Guam with projections of 120 mph winds by mid-week.