Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes
Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >
| NWS Forecast for: Guam Coastal Waters (PMZ151) Issued by: National Weather Service Tiyan, GU Last Update: 413 AM ChST Tue Apr 14 2026 |  |
Today: Northwest tropical storm force wind to 50 kt with gusts to 75 kt. Seas 19 to 23 ft. Isolated thunderstorms. Scattered showers early this morning, then numerous heavy showers this afternoon. Visibility 1 nm or less. Tonight: West tropical storm force wind to 50 kt with gusts to 75 kt. Seas 19 to 23 ft. Isolated thunderstorms. Numerous heavy showers until early morning, then scattered showers late. Visibility 1 nm or less in the evening. Wednesday: West tropical storm force wind to 45 kt with gusts to 70 kt. Seas 18 to 22 ft. Scattered showers with isolated thunderstorms. Wednesday Night: Southwest tropical storm force wind to 40 kt with gusts to 55 kt. Seas 16 to 19 ft. Scattered showers with isolated thunderstorms. Thursday: Southwest wind 20 to 25 kt. Seas 12 to 15 ft. Scattered showers with isolated thunderstorms. Friday: Southwest wind 10 to 20 kt. Seas 9 to 11 ft. Wave detail: northwest 11 ft at 11 seconds and southwest 4 ft at 6 seconds. Saturday: Southwest wind 5 to 15 kt. Seas 6 to 8 ft. Wave detail: northwest 8 ft at 10 seconds and southwest 2 ft at 4 seconds. | |
| Zone Forecast: Guam Coastal Waters (PMZ151) | |
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