WTPQ81 PGUM 120556 HLSPQ1 URGENT - IMMEDIATE BROADCAST REQUESTED Typhoon Sinlaku (04W) Local Statement National Weather Service Tiyan GU 356 PM ChST Sun Apr 12 2026 ...TYPHOON SINLAKU TURNS TO THE NORTH-NORTHWEST AND TREKS TOWARD THE MARIANAS... .NEW INFORMATION... A Typhoon Warning has been issued for Rota, Tinian, and Saipan. A Tropical Storm Warning has been issued for Guam. A Tropical Storm Watch has been issued for Pagan and Alamagan. .AREAS AFFECTED... This local statement provides important information and recommended actions for people in Chuuk, Guam, and the Northern Marianas. .WATCHES/WARNINGS... A Typhoon Warning is now in effect for Rota, Tinian, and Saipan. A Tropical Storm Warning is now in effect for Guam. A Tropical Storm Watch is now in effect for Pagan and Alamagan. A Typhoon Warning remains in effect for Fananu in Chuuk State. A Tropical Storm Warning remains in effect for Ulul in Chuuk State. A Typhoon Watch remains in effect for Ulul in Chuuk State. A Typhoon Watch remains in effect for Guam. A Flood Watch remains in effect for all of Guam and the Northern Marianas. Please listen closely for any Flash Flood Warnings that might be in effect once heavy rainfall arrives. 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 10.2N and longitude 151.0E. This was about 470 miles east- southeast of Guam. Storm motion was north-northwest, 345 degrees, at 9 mph. Storm intensity was 125 mph. .SITUATION OVERVIEW... Typhoon Sinlaku (04W) is slowly moving away from Chuuk State, as it redirected to the north-northwest and continues heading towards the Marianas. In the meantime, Sinlaku continues to bring periods of intense showers, thunderstorms, and winds to a large portion of Chuuk State, primarily to Ulul and Fananu. Recent storm tracks produced by JTWC continue to show a more northward shift in the storm path during its passage toward the Marianas, now expected to cross somewhere between Rota and Saipan. Even so, it is still too early to provide exact wind and surge forecast values for any specific island in the Marianas. .PRECAUTIONARY/PREPAREDNESS ACTIONS... For those under a warning, now is the time to rush to completion preparations for the protection of life and property. Evacuate if directed to do so by local officials, or if your home is vulnerable to high winds or flooding. In order to make the best decisions, be sure that you understand the terminology and definitions associated with tropical cyclone events. Stay indoors during heavy rain and windy conditions associated with Typhoon Sinlaku (04W). The onset of damaging, and potentially destructive winds, will pose a deadly threat to those venturing outside. For additional precautionary and preparedness information, please refer to the detailed recommendations relative to your location as further described by your local National Weather Service office and your local emergency management. && .NEXT UPDATE... The next local statement will be issued by the National Weather Service in Tiyan, Guam around 9 PM ChST, or sooner, if conditions warrant. GUZ001-121400- /O.NEW.PGUM.TR.W.4004.260412T0556Z-000000T0000Z/ /O.CON.PGUM.TY.A.4004.000000T0000Z-000000T0000Z/ Guam- 356 PM ChST Sun Apr 12 2026 ...TROPICAL STORM WARNING IN EFFECT... ...TYPHOON WATCH REMAINS IN EFFECT... ...PRECAUTIONARY/PREPAREDNESS ACTIONS... For those under a warning, now is the time to rush to completion preparations for the protection of life and property. 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, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible. Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. && ...WIND INFORMATION... As Typhoon Sinlaku (04W) moves closer, the threat for sustained high winds will continue to increase. Tropical storm force winds are currently forecast to begin affecting Guam late Monday afternoon, especially near the northern coastal waters and shores of Guam coming into Tuesday. ...COASTAL INUNDATION AND SURF INFORMATION... Due to higher astronomical tides this week and pre-existing elevated seas due to non-TC features in the area, hazardous surf is likely to become dangerous across north, east and south reefs in the Marianas as surf builds to 15 feet tonight, and potentially spreading to west facing reefs once TY Sinlaku moves west of the islands in the next several days. Coastal inundation is becoming more likely, now possible as early as Monday morning; as such, a Coastal Flood Watch remains in effect beginning Monday morning for significant coastal inundation of 2 feet or more possible. Inland flooding made worse by developing rain bands during storm passage 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 in the second half of the week, as swells will continue to pummel western Marianas shores. ...OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely for much of the week, with rainfall amounts upwards of 15 to 20 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. As such, a Flood Watch remains in effect for Guam. See latest forecast for latest information. Listen for possible flash flood warnings for your location, and be ready to act if flash flooding develops. $$ MPZ001>003-121400- /O.UPG.PGUM.TY.A.4004.000000T0000Z-000000T0000Z/ /O.NEW.PGUM.TY.W.4004.260412T0551Z-000000T0000Z/ Rota-Tinian-Saipan- 356 PM ChST Sun Apr 12 2026 ...TYPHOON WARNING IN EFFECT... ...PRECAUTIONARY/PREPAREDNESS ACTIONS... For those under a warning, now is the time to rush to completion preparations for the protection of life and property. 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, cover all windows and doors with shutters or plywood. Move patio furniture and other loose objects indoors. Brace all exterior doors, including garage doors. Do this as early as possible. If you need to make a trip to the hardware store, the grocery store, or the gas station, do so as early as possible. Stay calm and keep informed. Comply with any evacuation orders that are issued for your area. If you live in a metal roof or container home, or you live in a surge zone or any location prone to flooding, evacuate to a designated shelter or ride out the storm in the sturdy home of family or friends outside of evacuation zones. && ...WIND INFORMATION... As Typhoon Sinlaku (04W) moves closer, the threat for sustained high winds will continue to increase. The latest forecast is for Tropical storm force winds to begin affecting Rota, Tinian and Saipan Monday afternoon and evening, with Typhoon force winds developing Tuesday morning. Typhoon Sinlaku still has potential to cross the Marianas as a category 3 or 4 Typhoon. A general concern should be for the possibility of at least extensive damage somewhere within Northern Marianas under the Typhoon Warning. ...COASTAL INUNDATION AND SURF INFORMATION... Due to higher astronomical tides this week and pre-existing elevated seas due to non-TC features in the area, hazardous surf is likely to become dangerous across north, east and south reefs in the Marianas as surf builds to 15 feet tonight, and potentially spreading to west facing reefs once TY Sinlaku moves west of the islands in the next several days. Coastal inundation is becoming more likely, now possible as early as Monday morning; as such, a Coastal Flood Watch remains in effect beginning Monday morning for significant coastal inundation of 2 feet or more possible. Inland flooding made worse by developing rain bands during storm passage 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 in the second half of the week, as swells will continue to pummel western Marianas shores. ...OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely for much of the week, with rainfall amounts upwards of 15 to 20 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. As such, a Flood Watch remains in effect for Rota, Tinian, and Saipan. See latest forecast for latest information. Listen for possible flash flood warnings for your location, and be ready to act if flash flooding develops. $$ ...CHUUK... ...TROPICAL STORM WARNING HAS BEEN CANCELLED FOR CHUUK... .PRECAUTIONARY/PREPAREDNESS ACTIONS... The Tropical Storm Warning has been cancelled for Weno, Chuuk. Do not attempt any inter-island travel until winds and seas subside. Listen to instructions and updates from your local leaders. ...WIND INFORMATION... The highest winds associated with Typhoon Sinlaku (04W) have passed to the north of Weno, Chuuk. South winds of 20 to 30 mph with occasional gusts to 40 mph will steadily subside and shift to the southeast as Sinlaku continues to move away. ...COASTAL INUNDATION AND SURF INFORMATION... Seas of 12 to 14 feet are decreasing to between 10 and 12 feet Monday night, holding steady as distant swells generated by Typhoon Sinlaku continue to influence the region. Dangerous surf of 13 to 16 feet along south and west-facing reefs, with up to 2 feet of inundation remain likely. Elsewhere, hazardous surf of 7 to 9 feet are expected. ...OTHER STORM EFFECTS... Satellite microwave estimates and model guidance continue to suggest the potential for heavy rain to continue decreasing as Sinlaku moves away. Additional rainfall of 1 to 3 inches is possible overnight; the already saturated soils will still pose the risk for any additional rainfall to become runoff, increasing likelihood for sudden flash floods and maintaining a higher risk for mudslides. && ...FANANU... ....TYPHOON WARNING REMAINS IN EFFECT FOR FANANU... ..PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay indoors during heavy rain and very windy conditions associated with 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. Venturing outside is likely to pose a deadly threat to life. .WIND INFORMATION... As Typhoon Sinlaku maintains its north-northwest course, typhoon force winds around 74 mph will be maintained this afternoon, potentially decreasing tonight. .COASTAL INUNDATION AND SURF INFORMATION... Seas of 12 to 16 feet remain possible, with dangerous surf and significant coastal inundation and beach erosion expected. .OTHER STORM EFFECTS... Another 5 to 7 inches of additional rainfall is possible within as the center of TY Sinlaku continues moving northwest towards the Marianas. && ...ULUL... ...TYPHOON WATCH REMAINS IN EFFECT FOR ULUL... ...TROPICAL STORM WARNING REMAINS IN EFFECT FOR ULUL... ..PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay indoors during heavy rain and windy conditions associated with 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 southwesterly winds of 40 to 45 mph are expected to persist through at least early Monday morning, with winds becoming more south and decreasing 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 3 to 5 inches of additional rainfall is possible within as the center of TY Sinlaku continues moving northwest towards the Marianas. && ...PAGAN... ...TROPICAL STORM WATCH IN EFFECT FOR PAGAN... ..PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay indoors during heavy rain and windy conditions associated with 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... Fresh northeasterlies are expected to begin increasing tonight, with tropical storm force winds possible by Tuesday evening, 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 10 to 16 feet remain possible, with dangerous surf and significant coastal inundation and beach erosion expected. .OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely for much of the week, with rainfall amounts upwards of 15 to 20 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. && ...ALAMAGAN... ...TROPICAL STORM WATCH IN EFFECT FOR ALAMAGAN... ..PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay indoors during heavy rain and windy conditions associated with 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... Fresh northeasterlies are expected to begin increasing tonight, with tropical storm force winds possible by 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 10 to 16 feet remain possible, with dangerous surf and significant coastal inundation and beach erosion expected. .OTHER STORM EFFECTS... Heavy, intense rainfall with TY Sinlaku is likely for much of the week, with rainfall amounts upwards of 15 to 20 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. $$ Montvila