Active Weather Alerts
Typhoon Warning
Issued: 11:19 AM Apr. 12, 2026 – National Weather Service
...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 Super 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 evening or Monday, with Typhoon force winds developing; Tuesday. STY Sinlaku still has potential to cross the Marianas as a; category 4 or 5 Typhoon. Current forecast supports winds around 90 to; 120 mph across the islands, but peak winds near of 145 to 150 mph; could be found near the center, with latest track still supporting; passage somewhere between Rota and Saipan. 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 over the next; few 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. Windward shores could see inundation of; at least 4-7 feet. 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.
Flood Watch
Issued: 11:08 AM Apr. 12, 2026 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY MORNING... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Guam, Rota, Saipan and Tinian. * WHEN...Through Wednesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - - Typhoon Sinlaku is expected to approach the Marianas over the next 24 to 36 hours, crossing the islands on Tuesday, with rainfall amounts upwards of 15 to 20 inches possible near the center. - With a further north track, 6 to 12 inches, with locally higher amounts, are more probable for Guam. - Http://www.weather.gov/safety/flood - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
Typhoon Warning
Issued: 10:56 AM Apr. 12, 2026 – National Weather Service
...TYPHOON WARNING REMAINS IN EFFECT... * WHAT...Typhoon Warning. Tropical storm force winds of 40 to 60 kt are expected as early as late Monday afternoon, with typhoon force winds of 75 kt or greater as early as Tuesday morning. Seas are building to 30 feet or more by Tuesday. * WHERE...Rota, Tinian and Saipan Coastal Waters. * WHEN...Through at least Wednesday morning. * IMPACTS...Typhoon conditions, including winds of 64 knots or more, are possible within the next 48 hours. * ADDITIONAL DETAILS...Conditions are expected to be catastrophic for small craft, and extremely dangerous for any vessels of larger size. Seek sake harbor as soon as possible. Venturing out can result in loss of life and/or property. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid boating in hazardous conditions. &&
Coastal Flood Watch
Issued: 10:54 AM Apr. 12, 2026 – National Weather Service
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM CHST THURSDAY... ...COASTAL FLOOD WATCH REMAINS IN EFFECT FROM 6 AM CHST MONDAY THROUGH WEDNESDAY AFTERNOON... * WHAT...For the High Surf Warning, dangerously large breaking waves of 12 to 16 feet in the surf zone. For the Coastal Flood Watch, significant coastal flooding of 2 feet or greater possible. * WHERE...North, east and south facing reefs of the Marianas. For the Coastal Flood Watch, north, east, and south facing shorelines. * WHEN...For the High Surf Warning, until 6 PM ChST Thursday. For the Coastal Flood Watch, from 6 AM ChST Monday through Wednesday afternoon. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. Breaking waves can sweep people off jetties and docks, and into dangerous seas. Life-threatening swimming conditions and significant beach erosion can be expected. * ADDITIONAL DETAILS...As TY Sinlaku moves towards the Marianas swell and surf are expected to rapidly build. This will generate dangerous surf and increase the risk for coastal inundation, especially as TY Sinlaku begins to move through the Marianas on Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure. &&
High Surf Warning
Issued: 10:54 AM Apr. 12, 2026 – National Weather Service
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 6 PM CHST THURSDAY... ...COASTAL FLOOD WATCH REMAINS IN EFFECT FROM 6 AM CHST MONDAY THROUGH WEDNESDAY AFTERNOON... * WHAT...For the High Surf Warning, dangerously large breaking waves of 12 to 16 feet in the surf zone. For the Coastal Flood Watch, significant coastal flooding of 2 feet or greater possible. * WHERE...North, east and south facing reefs of the Marianas. For the Coastal Flood Watch, north, east, and south facing shorelines. * WHEN...For the High Surf Warning, until 6 PM ChST Thursday. For the Coastal Flood Watch, from 6 AM ChST Monday through Wednesday afternoon. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. Breaking waves can sweep people off jetties and docks, and into dangerous seas. Life-threatening swimming conditions and significant beach erosion can be expected. * ADDITIONAL DETAILS...As TY Sinlaku moves towards the Marianas swell and surf are expected to rapidly build. This will generate dangerous surf and increase the risk for coastal inundation, especially as TY Sinlaku begins to move through the Marianas on Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure. &&
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