Northern Mariana Islands Typhoon Warning | Effective 04/12/2026 16:28

The window of time to complete preparations for the protection of life and property will be closing later today. If evacuating to a public shelter, leave as soon as possible. Guard against being stuck out on roadways when dangerous winds and heavy rains arrive. Again, do not stay in a metal roof or container home. Items to bring to a shelter include a first aid kit, medicines and prescriptions, baby food and diapers, games and books, toiletries, a battery powered radio, a cell phone, flashlights with extra batteries, a blanket or sleeping bag for each person, personal identification, copies of key papers such as insurance policies, available cash and credit cards. Remember, pets are not allowed in most public shelters, so check ahead with your intended shelter. Regarding your home or business, finish covering all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors. If staying in a home, turn the refrigerator to maximum cold and keep it closed. Turn off propane tanks and unplug small appliances. Fill the bathtub with water in case the tap water becomes unavailable after the storm. This is for cleaning and flushing purposes. Do not drink it. Stay indoors during heavy rain and windy conditions associated with Super Typhoon Sinlaku (04W). Heed the advice of your local emergency managers and officials, and continue to monitor forecasts by your local National Weather Service office in Tiyan, Guam. Remain in a sturdy shelter until the all clear is given. .WIND INFORMATION... Fresh northeasterlies are expected to begin increasing tonight, with tropical storm force winds possible late morning or early afternoon on Tuesday, maintaining these conditions for several days after if Sinlaku continues on its accelerated northward trek after exiting the Marianas in the second half of the week. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 20 to 30 feet remain possible, with dangerous surf and significant coastal inundation and beach erosion possible. .OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely for much of the week, with rainfall amounts upwards of 15 to 25 inches near the center, as the system crosses the Marianas. The exact track of Sinlaku will determine where the heaviest rainfall will set up across the islands. Stay indoors during heavy rain and windy conditions associated with Super Typhoon Sinlaku (04W). Heed the advice of your local emergency managers and officials, and continue to monitor forecasts by your local National Weather Service office in Tiyan, Guam. Remain in a sturdy shelter until the all clear is given. .WIND INFORMATION... Fresh northeasterlies are expected to begin increasing tonight, with tropical storm force winds possible Tuesday afternoon, maintaining these conditions for several days after if Sinlaku continues on its accelerated northward trek after exiting the Marianas in the second half of the week. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 20 to 30 feet remain possible, with dangerous surf and significant coastal inundation and beach erosion possible. .OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely for much of the week, with rainfall amounts upwards of 15 to 25 inches near the center, as the system crosses the Marianas. The exact track of Sinlaku will determine where the heaviest rainfall will set up across the islands. Stay indoors during heavy rain and windy conditions associated with Super Typhoon Sinlaku (04W). Heed the advice of your local emergency managers and officials, and continue to monitor forecasts by your local National Weather Service office. Remain in a sturdy shelter until the all clear is given. .WIND INFORMATION... Tropical Storm force winds continue at Ulul, as Sinlaku continues to move away to the northwest. Damaging southwest to south winds around 39 mph are expected to persist through mid-day, with winds becoming more south and decreasing through the day as Sinlaku continues to move away toward the Marianas. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 10 to 14 feet remain possible, with dangerous surf and significant coastal inundation and beach erosion expected. .OTHER STORM EFFECTS... Another 2 to 4 inches of additional rainfall is possible within the heavy bands of showers south of Sinlaku as the center of STY Sinlaku continues moving northwest towards the Marianas.