Active Weather Alerts
High Surf Warning
Issued: 11:56 AM Apr. 16, 2026 – National Weather Service
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST FRIDAY... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 5 PM CHST SATURDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM CHST SATURDAY... * WHAT...For the Coastal Flood Warning, significant coastal flooding of 5 to 8 feet. For the High Surf Warning, dangerously large breaking waves of 16 to 20 feet. For the Coastal Flood Advisory, minor coastal flooding of 1 to 2 feet expected. For the High Surf Advisory, large breaking waves of 10 to 14 feet expected. For the High Rip Current Risk, dangerous rip currents. * WHERE...South, west and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Warning, until noon ChST Friday. For the High Surf Warning, until 5 PM ChST Friday. For the Coastal Flood Advisory, from noon Friday to 5 PM ChST Saturday. For the High Surf Advisory, from 5 PM Friday to 5 PM ChST Saturday. For the High Rip Current Risk, through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind driven waves decrease, the primary swell and highest surf will become southwest. Seas will be slow to subside over the next couple of days. 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. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
High Surf Advisory
Issued: 11:56 AM Apr. 16, 2026 – National Weather Service
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST FRIDAY... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 5 PM CHST SATURDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM CHST SATURDAY... * WHAT...For the Coastal Flood Warning, significant coastal flooding of 5 to 8 feet. For the High Surf Warning, dangerously large breaking waves of 16 to 20 feet. For the Coastal Flood Advisory, minor coastal flooding of 1 to 2 feet expected. For the High Surf Advisory, large breaking waves of 10 to 14 feet expected. For the High Rip Current Risk, dangerous rip currents. * WHERE...South, west and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Warning, until noon ChST Friday. For the High Surf Warning, until 5 PM ChST Friday. For the Coastal Flood Advisory, from noon Friday to 5 PM ChST Saturday. For the High Surf Advisory, from 5 PM Friday to 5 PM ChST Saturday. For the High Rip Current Risk, through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind driven waves decrease, the primary swell and highest surf will become southwest. Seas will be slow to subside over the next couple of days. 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. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
Coastal Flood Warning
Issued: 11:56 AM Apr. 16, 2026 – National Weather Service
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST FRIDAY... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 5 PM CHST SATURDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM CHST SATURDAY... * WHAT...For the Coastal Flood Warning, significant coastal flooding of 5 to 8 feet. For the High Surf Warning, dangerously large breaking waves of 16 to 20 feet. For the Coastal Flood Advisory, minor coastal flooding of 1 to 2 feet expected. For the High Surf Advisory, large breaking waves of 10 to 14 feet expected. For the High Rip Current Risk, dangerous rip currents. * WHERE...South, west and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Warning, until noon ChST Friday. For the High Surf Warning, until 5 PM ChST Friday. For the Coastal Flood Advisory, from noon Friday to 5 PM ChST Saturday. For the High Surf Advisory, from 5 PM Friday to 5 PM ChST Saturday. For the High Rip Current Risk, through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind driven waves decrease, the primary swell and highest surf will become southwest. Seas will be slow to subside over the next couple of days. 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. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
Rip Current Statement
Issued: 11:56 AM Apr. 16, 2026 – National Weather Service
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST FRIDAY... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 5 PM CHST SATURDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM CHST SATURDAY... * WHAT...For the Coastal Flood Warning, significant coastal flooding of 5 to 8 feet. For the High Surf Warning, dangerously large breaking waves of 16 to 20 feet. For the Coastal Flood Advisory, minor coastal flooding of 1 to 2 feet expected. For the High Surf Advisory, large breaking waves of 10 to 14 feet expected. For the High Rip Current Risk, dangerous rip currents. * WHERE...South, west and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Warning, until noon ChST Friday. For the High Surf Warning, until 5 PM ChST Friday. For the Coastal Flood Advisory, from noon Friday to 5 PM ChST Saturday. For the High Surf Advisory, from 5 PM Friday to 5 PM ChST Saturday. For the High Rip Current Risk, through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind driven waves decrease, the primary swell and highest surf will become southwest. Seas will be slow to subside over the next couple of days. 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. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
Coastal Flood Advisory
Issued: 11:56 AM Apr. 16, 2026 – National Weather Service
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST FRIDAY... ...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY... ...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 5 PM CHST SATURDAY... ...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM CHST SATURDAY... * WHAT...For the Coastal Flood Warning, significant coastal flooding of 5 to 8 feet. For the High Surf Warning, dangerously large breaking waves of 16 to 20 feet. For the Coastal Flood Advisory, minor coastal flooding of 1 to 2 feet expected. For the High Surf Advisory, large breaking waves of 10 to 14 feet expected. For the High Rip Current Risk, dangerous rip currents. * WHERE...South, west and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Warning, until noon ChST Friday. For the High Surf Warning, until 5 PM ChST Friday. For the Coastal Flood Advisory, from noon Friday to 5 PM ChST Saturday. For the High Surf Advisory, from 5 PM Friday to 5 PM ChST Saturday. For the High Rip Current Risk, through Saturday afternoon. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind driven waves decrease, the primary swell and highest surf will become southwest. Seas will be slow to subside over the next couple of days. 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. Rip currents will be life threatening. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help. &&
Typhoon Warning
Issued: 11:46 AM Apr. 16, 2026 – National Weather Service
...TYPHOON WARNING REMAINS IN EFFECT... * WHAT...Typhoon Warning. For Rota, tropical storm force winds to 35 kt, with gusts to 45 kt. Seas will continue to slowly subside and are between 17 and 22 feet. For Tinian and Saipan, tropical storm winds of up to 45 kt with gusts to 55 kt. Seas are now subsiding and are between 19 and 26 feet. * WHERE...Rota, Tinian, and Saipan Coastal Waters. * WHEN...Through at least this evening for Rota, through at least Friday morning for Tinian and Saipan. * IMPACTS...Conditions will be catastrophic for small craft and dangerous for large vessels. Remain in safe harbor. * ADDITIONAL DETAILS...Tropical storm winds of 40 kt are occurring for northern Rota waters, decreasing to 35 kt over southern waters. Winds of 50 kt are currently over the northern waters of Tinian and Saipan, with 40 kt over southern waters. Winds and seas will continue to decrease over the next 24 hours. Seas will be highest over the northern portions of the waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... A typhoon warning means sustained winds of 64 kt or 74 mph or greater are expected or occurring. &&
Typhoon Warning
Issued: 10:17 AM Apr. 16, 2026 – National Weather Service
...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.
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