WTPQ81 PGUM 162315 HLSPQ1 URGENT - IMMEDIATE BROADCAST REQUESTED Typhoon Sinlaku (04W) Local Statement National Weather Service Tiyan GU 915 AM ChST Fri Apr 17 2026 ...TYPHOON SINLAKU MOVING NORTH-NORTHEAST THROUGH THE NORTHERN CNMI... .NEW INFORMATION... The Typhoon Warnings for Tinian and Saipan are cancelled. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Guam and the Northern Marianas. .WATCHES/WARNINGS... Typhoon Warnings for Tinian and Saipan are cancelled. A Typhoon Warning continues for Alamagan, Pagan, and Agrihan. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 AM ChST...the center of Typhoon Sinlaku (04W) was located near latitude 19.3N...longitude 145.2E. This was about 405 miles north of Guam, 290 miles north of Saipan, 300 miles north of Tinian, 50 miles northwest of Agrihan. Storm motion was north-northeast, 15 degrees, at 7 mph. Storm intensity was 100 mph. .SITUATION OVERVIEW... Typhoon Sinlaku is moving north-northeast at 7 mph through the northern CNMI, to the west of Alamagan, Pagan and Agrihan. It is expected to make a turn toward the northeast with an increase in forward speed over the next couple of days. As Sinlaku continues to push north-northeastward, tropical storm force winds are now north of Tinian and Saipan, resulting in the cancellation of the Typhoon Warnings for both islands. Sinlaku is forecast to continue to weaken over the next couple of days, possibly becoming extratropical Sunday. .PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. Stay inside and away from windows. Do not venture outside when high winds are occurring as flying debris can easily cause serious injury. 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 at 3 PM ChST, or sooner, if conditions warrant. MPZ002-003-170600- /O.CAN.PGUM.TY.W.4004.000000T0000Z-000000T0000Z/ /O.NEW.PGUM.HU.S.4004.260416T2315Z-260417T0600Z/ Tinian-Saipan- 915 AM ChST Fri Apr 17 2026 ...TYPHOON WARNINGS ARE CANCELLED... ...PRECAUTIONARY/PREPAREDNESS ACTIONS... Even though winds have decreased, remain indoors until the "all clear" is given. Strong to tropical storm force gusts remain a possibility through today, especially with any passing shower. Stronger gusts could still damage remaining metal roof homes. Electricity and water will remain unavailable for days and perhaps weeks. Most trees will be snapped or uprooted. Fallen trees may cut off residential areas for days to weeks. Residents should closely monitor NOAA weather radio or other local news outlets for official recovery information. && ...WIND INFORMATION...For Tinian and Saipan, south to southwest winds of around 25 to 35 mph with gusts to 45 mph are possible through Saturday as Sinlaku continues to move northeast and weaken. Gusts could be stronger with any passing shower. ...COASTAL INUNDATION AND SURF INFORMATION... Dangerous surf of 13 to 19 feet along south, west and north facing reefs due to wind-driven waves and swell produced by Sinlaku will slowly subside over the next couple of days. Sinlaku is producing a fully developed northwest to north swell as well. Inundation of 3 to 5 feet is expected due to wind driven waves and large swell. A Coastal Flood Warning remains in effect. Surf will be slow to decrease as swells will continue to pummel western Marianas shores. Rip currents will be deadly. Residents should the beaches for the next few days. ...OTHER STORM EFFECTS... Heavy rainfall is no longer a threat for Tinian and Saipan. $$ MPZ001-170015- /O.CAN.PGUM.HU.S.4004.000000T0000Z-260417T0000Z/ Rota- 915 AM ChST Fri Apr 17 2026 ...TYPHOON WARNING WAS CANCELLED ... ...PRECAUTIONARY/PREPAREDNESS ACTIONS... Typhoon Sinlaku is now centered 335 miles north of Rota and continues to pull away to the north. Although Rota is now fully outside of the tropical storm force wind field, tropical storm force gusts to around 40 mph look to continue this morning, with even higher gusts possible near any passing shower. Dangerous surf of 12 to 16 feet is still occurring across south, west, and north facing reefs of Rota, driven by the southwesterly winds and large north to northwest swell from Sinlaku. 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. Surf will be slow to decrease over the next few days as swell from Sinlaku continues to pummel northern and western Marianas shores. && ...ALAMAGAN... ...A TYPHOON WARNING REMAINS IN 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. If not already there, seek 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... Southwesterly tropical storm force winds around 50 to 65 mph with gusts to 85 mph are expected this morning, subsiding to 40 to 50 mph with gusts to 70 mph this afternoon. The size of the storm and overall storm motion will maintain southwest tropical storm winds through this afternoon as Sinlaku continues on its accelerated northeastward trek through the northern CNMI. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 25 to 35 feet remain possible, producing dangerous surf, significant coastal inundation and beach erosion. Inundation of 2 to 4 feet is possible, especially along south and west facing shorelines. .OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely today, 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... Southwesterly tropical storm force winds around 60 to 70 mph with gusts to 90 mph are expected this morning, subsiding to 45 to 55 mph with gusts to 75 mph this afternoon. The size of the storm and overall storm motion will maintain southwest tropical storm winds through this afternoon or early this evening as Sinlaku continues on its northeastward trek through the northern CNMI. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 25 to 35 feet remain possible, with dangerous surf and significant coastal inundation and beach erosion. .OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely today, 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. && ...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... South to southwesterly typhoon force winds around 85 mph with gusts to 110 mph are expected this morning as Sinlaku moves northeast. Winds will shift toward the west this afternoon, decreasing to 55 to 70 mph with gusts to 85 mph this afternoon. Winds will continue to decrease as Sinlaku moves farther northeast. The size of the storm and overall storm motion will maintain south to southwest tropical storm winds into tonight as Sinlaku continues on its accelerated northeastward trek through the northern CNMI. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 26 to 38 feet will be possible, with dangerous surf, significant coastal inundation and beach erosion. .OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely today bringing additional rainfall amounts of 5 to 8 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. $$ Kleeschulte