968 WTPQ81 PGUM 161017 HLSPQ1 URGENT - IMMEDIATE BROADCAST REQUESTED Typhoon Sinlaku (04W) Local Statement National Weather Service Tiyan GU 817 PM ChST Thu Apr 16 2026 ...TYPHOON SINLAKU MOVING NORTH-NORTHEAST THROUGH THE NORTHERN CNMI TO THE WEST OF PAGAN... .NEW INFORMATION... None. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Warning continues for Rota, Tinian, Saipan, Alamagan, Pagan, and Agrihan. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 PM ChST...the center of Typhoon Sinlaku (04W) was located near latitude 18.0N...longitude 144.6E. This was about 75 miles west of Pagan, 85 miles west-northwest of Alamagan, 85 miles southwest of Agrihan, and 310 miles north of Guam. Storm motion was north-northeast, 10 degrees, at 7 mph. Storm intensity was 115 mph. .SITUATION OVERVIEW... The eye of Typhoon Sinlaku (04W) is moving north-northeast and has picked up forward speed since early this afternoon, moving at roughly 7 to 9 mph. The eye is currently west of Pagan, well north-northwest of Tinian and Saipan. As Sinlaku moves through the northern CNMI tonight and Friday, it is forecast to curve further to the northeast, passing west, then north of Agrihan through Friday afternoon. .PRECAUTIONARY/PREPAREDNESS ACTIONS... For those under a warning in Rota, Tinian, and Saipan, remain in a designated shelter or in a sturdy, fully reinforced concrete building to ride out the storm until winds have subsided and the "all clear" is given. Stay inside and away from windows. Do not venture outside when high winds are occurring as flying debris can easily cause serious injury. For those under a warning in the far northern Mariana Islands of Alamagan, Pagan, and Agrihan, preparations for the protection of life and property should have already been completed. People should be in a designated hardened shelter. Remain in shelter until the "all clear" is given. Closely monitor NOAA weather radio or other local news outlets for official storm information. Listen for possible changes to the forecast. && .NEXT UPDATE... The next local statement will be issued by the National Weather Service in Tiyan around 3 AM ChST early Friday morning, or sooner if conditions warrant. MPZ001>003-161830- /O.CON.PGUM.TY.W.4004.000000T0000Z-000000T0000Z/ Rota-Tinian-Saipan- 817 PM ChST Thu Apr 16 2026 ...TYPHOON WARNING REMAINS IN EFFECT... ...PRECAUTIONARY/PREPAREDNESS ACTIONS... People should remain in a designated shelter or in a sturdy and reinforced concrete building to ride out the storm as tropical storm force winds are occurring at Rota, Tinian, and Saipan. Due to the size of the storm, the latest forecast has tropical storm force winds continuing over northern Rota waters over the next few hours tonight, and through the very early morning hours Friday for Tinian and Saipan. Even when winds start to decrease, remain indoors until the "all clear" is given. Strong to tropical storm force gusts remain a possibility for the next day or two, especially with any passing shower. Damage to remaining metal roof homes remains possible. Electricity and water will remain unavailable for days and perhaps weeks after the storm passes. Most trees will be snapped or uprooted. Fallen trees may cut off residential areas for days to weeks. && ...WIND INFORMATION... For Rota, southwesterly tropical storm winds around 35 to 45 mph with gusts to 60 mph are still expected for the next few hours over northern coastal waters tonight, especially near any showers. At Rota, sustained winds are expected to continue falling below tropical storm force of 39 mph by this evening. For Tinian and Saipan, south to southwest tropical storm force winds of around 35 to 45 mph with gusts to 55 mph are possible tonight as the eye continues to move slowly north, away from the islands, decreasing to 25 to 35 mph early Friday morning. ...COASTAL INUNDATION AND SURF INFORMATION... Dangerous surf at Rota is expected to be around 13 to 19 feet along north, south and west facing reefs due to westerly wind- driven waves. For Tinian and Saipan, 16 to 20 feet is possible along north, south and west facing reefs as winds have shifted south to southwest, starting to limit surf along east facing reefs at this time. Sinlaku is producing a fully developed northwest to north swell as well. Inundation of 1-2 feet for Rota is possible along south, west, and north facing reefs due to westerly wind-driven surf. For Tinian and Saipan, inundation of 4 to 7 feet is expected. A Coastal Flood Warning remains in effect for Tinian and Saipan, and a Coastal Flood Advisory is in effect for Rota. Surf will be slow to decrease after Sinlaku's exit to the northwest for the remainder of the week, as swells will continue to pummel western Marianas shores. ...OTHER STORM EFFECTS... Heavy rainfall is no longer a threat for Rota. Although the Flood Watch has expired for Tinian and Saipan, moderate to locally heavy fast-moving showers are still possible along the outer southeast periphery of Sinlaku's rainbands. Additional rainfall up to 0.5 inches remain possible through tonight for Tinian and Saipan. && ...ALAMAGAN... ...A TYPHOON WARNING REMAINS EFFECT FOR ALAMAGAN... ...PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay indoors during heavy rain and windy conditions associated with Typhoon Sinlaku (04W). The window of time to complete preparations for the protection of life and property has closed. Find shelter to ride out the storm. Remain in a sturdy shelter until the "all clear" is given. 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. .WIND INFORMATION... Northeasterly tropical storm force winds around 65 mph are expected this evening with typhoon winds around 75 mph possible as Sinlaku passes to the west, and winds shift towards 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 TY Sinlaku is likely tonight and Friday, bringing additional rainfall amounts of 3 to 5 inches by the weekend, with rainfall amounts upwards of 10 to 15 inches near the center, as the system moves across the northern CNMI. The exact track of Sinlaku will determine where the heaviest rainfall will set up across the islands. ...PAGAN... ...A TYPHOON WARNING REMAINS IN EFFECT FOR PAGAN... ...PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay indoors during heavy rain and windy conditions associated with Typhoon Sinlaku (04W). The window of time to complete preparations for the protection of life and property has closed. Find shelter to ride out the storm. Remain in a sturdy shelter until the "all clear" is given. 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. .WIND INFORMATION... Northeasterly tropical storm force winds around 65 mph are expected to increase tonight with typhoon winds around 75 mph as Sinlaku passes to the west, and winds shift toward the south to southeast. The size of the storm and overall storm motion will maintain southeast tropical storm winds through Friday evening 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 TY Sinlaku is likely tonight and Friday, bringing additional rainfall amounts of 5 to 7 inches by the weekend, with rainfall amounts upwards of 10 to 15 inches near the center, as the system moves across the northern CNMI. The exact track of Sinlaku will determine where the heaviest rainfall will set up across the islands. && ...AGRIHAN... ...A TYPHOON WARNING REMAINS IN EFFECT FOR AGRIHAN... ..PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay indoors during heavy rain and windy conditions associated with Typhoon Sinlaku (04W). The window of time to complete preparations for the protection of life and property has closed. Find shelter to ride out the storm. Remain in a sturdy shelter until the "all clear" is given. 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. .WIND INFORMATION... Northeasterly tropical storm force winds around 65 mph will be increasing this evening with typhoon winds around 95 mph possibly reaching the island late tonight as Sinlaku passes nearby to the west, and winds shift toward the south to southeast. The size of the storm and overall storm motion will maintain southeast tropical storm winds into Friday night 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 TY Sinlaku is likely tonight and tomorrow, bringing additional rainfall amounts of 6 to 9 inches by the weekend, with rainfall amounts upwards of 10 to 15 inches near the center, as the system moves across the northern CNMI. The exact track of Sinlaku will determine where the heaviest rainfall will set up across the islands. $$ DeCou