Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada
Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >
| NWS Forecast for: Guam Coastal Waters (PMZ151) Issued by: National Weather Service Tiyan, GU Last Update: 402 PM ChST Mon Apr 13 2026 | |
Tonight: North tropical storm force wind to 40 kt with gusts to 55 kt. Seas 18 to 22 ft. Scattered showers with isolated thunderstorms. Tuesday: Northwest tropical storm force wind to 45 kt with gusts to 65 kt. Seas 20 to 25 ft. Scattered showers with isolated thunderstorms. Tuesday Night: West tropical storm force wind to 45 kt with gusts to 65 kt. Seas 20 to 25 ft. Scattered showers with isolated thunderstorms. Wednesday: West tropical storm force wind to 40 kt with gusts to 55 kt. Seas 18 to 22 ft. Scattered showers with isolated thunderstorms. Wednesday Night: Southwest wind 30 kt with gusts to 40 kt. Seas 15 to 18 ft. Scattered showers with isolated thunderstorms. Thursday: Southwest wind 15 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 10 kt. Seas 7 to 10 ft. Wave detail: northwest 10 ft at 10 seconds and southwest 2 ft at 4 seconds. | |
| Zone Forecast: Guam Coastal Waters (PMZ151) | |
Visit your local NWS office at: https://www.weather.gov/gum |