794 WTPQ81 PGUM 160542 HLSPQ1 URGENT - IMMEDIATE BROADCAST REQUESTED Typhoon Sinlaku (04W) Local Statement National Weather Service Tiyan GU 342 PM ChST Thu Apr 16 2026 ...TYPHOON SINLAKU MOVING SLOWLY NORTH THROUGH THE NORTHERN CNMI... .NEW INFORMATION... A Tropical Storm Warning and Typhoon Watch have been cancelled for the island of Guam and adjacent coastal waters. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Warning continues for Rota, Tinian, and Saipan. Although tropical cyclone watches or warnings are no longer in effect for Guam, possible impacts from related hazards are still a concern. A Flood Watch is in effect for portions of the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 2 PM ChST...the center of Typhoon Sinlaku (04W) was located near latitude 17.4N...longitude 144.5E. This was about 90 miles west of Alamagan, 95 miles west-southwest of Pagan, 120 miles southwest of Agrihan, 175 miles north-northwest of Saipan and Tinian, and 270 miles north of Guam. Storm motion was north, 355 degrees, at 4 mph. Storm intensity was 115 mph. .SITUATION OVERVIEW... The eye of Typhoon Sinlaku (04W) is moving slowly north and the eye is well north-northwest of Tinian and Saipan. Latest satellite imagery indicates that the storm center has just begun to shift toward the north-northeast. Typhoon Sinlaku has been slow to move out, and the TS wind field has expanded since earlier this morning. This kept the northern coastal waters of Guam just within the tropical storm force winds until just earlier this afternoon, and Saipan and Tinian are now just outside of the outer edge of the destructive tropical storm winds. Typhoon Sinlaku is now moving through the northern CNMI just west of Alamagan, Pagan, and Agrihan. As Sinlaku moves through the northern CNMI today and tonight, it is forecast to curve further to the northeast, passing north of Agrihan Friday. .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 9 PM ChST tonight, or sooner if conditions warrant. GUZ001-160900- /O.CAN.PGUM.TR.W.4004.000000T0000Z-000000T0000Z/ /O.CAN.PGUM.TY.A.4004.000000T0000Z-000000T0000Z/ /O.NEW.PGUM.HU.S.4004.260416T0542Z-260416T0900Z/ Guam- 342 PM ChST Thu Apr 16 2026 ...TROPICAL STORM WARNING HAS BEEN CANCELLED... ...TYPHOON WATCH HAS BEEN CANCELLED... Typhoon Sinlaku is now centered 270 miles north of Guam and continues to pull away to the north. Guam and the adjacent coastal waters are now fully outside of the tropical storm force wind field, but tropical storm force gusts to around 45 mph look to continue into this evening, with even higher gusts possible near any passing shower. Dangerous surf of 12 to 17 feet are still occurring across south, west, and north facing reefs of Guam, driven by the southwesterly winds. The threat of coastal inundation is starting to diminish this afternoon, but minor coastal flooding of up to 2 feet will remain possible into the weekend along south, west, and north facing reefs of Guam, mainly along west facing shores and beaches due to the wind driven waves. Surf will be slow to decrease over the next few days as swell from Sinlaku continues to pummel northern and western Marianas shores. $$ MPZ001>003-161345- /O.CON.PGUM.TY.W.4004.000000T0000Z-000000T0000Z/ Rota-Tinian-Saipan- 342 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 at Rota for the next few hours this afternoon, and very late tonight 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. Destruction of 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 this afternoon, especially during periods of showers. Winds are then expected to drop 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 2-4 feet for Rota is possible along south, west, and north facing reefs due to westerly wind-driven surf. For Tinian and Saipan, inundation of 5 to 8 feet is expected. A Coastal Flood Warning remains in effect. Inland flooding made worse by rainbands will significantly increase coastal inundation as rain run-off and storm surge interact. 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 is expiring for Tinian and Saipan, locally heavy fast-moving showers are still possible along the outer southeast periphery of Sinlaku's rainbands. Additional rainfall of 0.5 inches to 1.5 inches remain possible through this evening 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 4 to 6 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 today 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 today 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