Northern Mariana Islands Typhoon Warning | Effective 04/13/2026 16:21

People should be in a designated shelter or in a sturdy and reinforced concrete building to ride out the storm as tropical storm force winds are occurring and will be increasing through the day. Due to the size of the storm, tropical storm force winds are expected to continue through Wednesday night and into Thursday morning for Rota and Thursday evening for Tinian and Saipan. While recent forecast tracks continue to favor the center of Sinlaku passing near or over Tinian and Saipan, typhoon force winds of 74 mph or greater are still possible for Rota late today and tonight. Tinian and Saipan should prepare for the potential for extensive damage, especially to non-concrete roofs and buildings. 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). The window of time to complete preparations for the protection of life and property is very soon to close. Evacuate if directed to do so by local officials, or if your home is vulnerable to high winds or flooding. 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... Northeasterly tropical storm force winds around 39 mph are expected to start this afternoon and potentially increasing to typhoon winds around 75 mph late Wednesday night as Sinlaku passes near to the west, and winds shift toward the southeast. The size of the storm and overall storm motion will maintain southeast tropical storm winds through Friday afternoon as Sinlaku continues on its accelerated northward trek after exiting the Marianas later in 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 STY Sinlaku is likely for much of the week, bringing rainfall amounts of 10 to 13 inches by Friday, 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). The window of time to complete preparations for the protection of life and property is very soon to close. Evacuate if directed to do so by local officials, or if your home is vulnerable to high winds or flooding. 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... Northeasterly tropical storm force winds around 39 mph are expected to start this evening and potentially increasing to typhoon winds around 75 mph early Thursday morning as Sinlaku passes near to the west, and winds shift toward the southeast. The size of the storm and overall storm motion will maintain southeast tropical storm winds through the end of the week as Sinlaku continues on its accelerated northward trek after exiting the Marianas. .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 STY Sinlaku is likely for much of the week, bringing rainfall amounts of 10 to 13 inches by the Friday, 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). The window of time to complete preparations for the protection of life and property is very soon to close. Evacuate if directed to do so by local officials, or if your home is vulnerable to high winds or flooding. 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... Northeasterly tropical storm force winds around 39 mph are expected to start Wednesday and potentially increasing to typhoon winds around 75 mph Thursday afternoon as Sinlaku passes near to the west, and winds shift toward the southeast. The size of the storm and overall storm motion will maintain southeast tropical storm winds through the end of the week as Sinlaku continues on its accelerated northward trek after exiting the Marianas. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 20 to 30 feet will be possible, with dangerous surf and significant coastal inundation and beach erosion possible. .OTHER STORM EFFECTS... Heavy, intense rainfall with STY 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.