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Weather alerts in Northern Mariana Islands

Every active National Weather Service alert, with the EAS event code your station's EAS decoder will see for it. Updated every two minutes.

6 active alerts, most severe first. Times are the issuing office's local time.

AlertEAS codeAreaUntilFrom
Typhoon WarningExtreme · updated
Details

...TYPHOON CHAMPI NOW A DANGEROUS CATEGORY 4 MOVING WEST TOWARDS GUAM COASTAL WATERS... .NEW INFORMATION... Guam is now in Condition of Readiness 1 as of 1 PM ChST. Rota is now in Typhoon Condition of Readiness 1 as of 5 PM ChST. Saipan and Tinian remain in Typhoon Condition of Readiness 3. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning and a Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for Rota, Tinian and Saipan in the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. A Flash Flood Warning is now in effect for Guam. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 PM ChST...the center of Typhoon Champi (29W) was located near latitude 12.6N...longitude 146.7E. This was about 140 miles east-southeast of Guam. Storm motion was west, 280 degrees, at 15 mph. Storm intensity was 130 mph. This general forecast track will take Champi just south of Guam as a Category 4 typhoon as it intensifies further the next few days. .SITUATION OVERVIEW... Typhoon Champi (29W) has been undergoing rapid intensification today. As a result it is now a dangerous category 4 typhoon. It is expected to pass a little south of Guam as a super typhoon within the next 12 hours. This may potentially bring devastating wind conditions to much of Guam during passage. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

What to do: Tropical storm conditions will soon occur. Get to safe shelter now if you are not already there. Everyone should remain alert and stay inside. Listen for possible flood warnings.

HUW Rota Oct 18, 5:30 AM NWS Tiyan GU
Tropical Storm WarningSevere · updated
Details

...TYPHOON CHAMPI NOW A DANGEROUS CATEGORY 4 MOVING WEST TOWARDS GUAM COASTAL WATERS... .NEW INFORMATION... Guam is now in Condition of Readiness 1 as of 1 PM ChST. Rota is now in Typhoon Condition of Readiness 1 as of 5 PM ChST. Saipan and Tinian remain in Typhoon Condition of Readiness 3. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning and a Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for Rota, Tinian and Saipan in the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. A Flash Flood Warning is now in effect for Guam. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 PM ChST...the center of Typhoon Champi (29W) was located near latitude 12.6N...longitude 146.7E. This was about 140 miles east-southeast of Guam. Storm motion was west, 280 degrees, at 15 mph. Storm intensity was 130 mph. This general forecast track will take Champi just south of Guam as a Category 4 typhoon as it intensifies further the next few days. .SITUATION OVERVIEW... Typhoon Champi (29W) has been undergoing rapid intensification today. As a result it is now a dangerous category 4 typhoon. It is expected to pass a little south of Guam as a super typhoon within the next 12 hours. This may potentially bring devastating wind conditions to much of Guam during passage. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

What to do: Take small loose objects indoors. Identify suitable shelter. Stock up a few days worth of food and water. If no concrete shelter is available look for a cave or something similar. Take action to protect food crops or other possessions as appropriate.

TRW Tinian; Saipan Oct 18, 5:30 AM NWS Tiyan GU
Typhoon WatchSevere · updated
Details

...TYPHOON CHAMPI NOW A DANGEROUS CATEGORY 4 MOVING WEST TOWARDS GUAM COASTAL WATERS... .NEW INFORMATION... Guam is now in Condition of Readiness 1 as of 1 PM ChST. Rota is now in Typhoon Condition of Readiness 1 as of 5 PM ChST. Saipan and Tinian remain in Typhoon Condition of Readiness 3. .AREAS AFFECTED... This local statement provides information and recommended actions for people on Guam and on Rota, Tinian and Saipan in the Northern Marianas. .Watches/Warnings... A Typhoon Warning continues for Guam and Rota. A Tropical Storm Warning and a Typhoon Watch continues for Tinian and Saipan. A Flood Watch is in effect for Rota, Tinian and Saipan in the Northern Marianas. Please listen closely for any Flood Warnings that might be in effect for your area. A Flash Flood Warning is now in effect for Guam. Please check the latest public and marine forecasts for detailed information about additional hazards. .STORM INFORMATION... At 7 PM ChST...the center of Typhoon Champi (29W) was located near latitude 12.6N...longitude 146.7E. This was about 140 miles east-southeast of Guam. Storm motion was west, 280 degrees, at 15 mph. Storm intensity was 130 mph. This general forecast track will take Champi just south of Guam as a Category 4 typhoon as it intensifies further the next few days. .SITUATION OVERVIEW... Typhoon Champi (29W) has been undergoing rapid intensification today. As a result it is now a dangerous category 4 typhoon. It is expected to pass a little south of Guam as a super typhoon within the next 12 hours. This may potentially bring devastating wind conditions to much of Guam during passage. .PRECAUTIONARY/PREPAREDNESS ACTIONS...

What to do: Take small loose objects indoors. Identify suitable shelter. Stock up a few days worth of food and water. If no concrete shelter is available look for a cave or something similar. Take action to protect food crops or other possessions as appropriate.

HUA Tinian; Saipan Oct 18, 5:30 AM NWS Tiyan GU
Flood WatchSevere · updated
Details

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Guam, Rota, Saipan and Tinian. * WHEN...Through Sunday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - Typhoon Champi (29W) will produce locally heavy rainfall late tonight and Sunday. although an unexpected southward shift in track will reduce these somewhat. Tinian and Saipan will see around 3 to 5 inches, Rota could receive 5 to 8 inches, and Guam might get 8 to 14 inches. - http://www.weather.gov/safety/flood

What to do: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

FFA Guam; Rota; Tinian; Saipan Oct 18, 4:00 PM NWS Tiyan GU
Coastal Flood WarningSevere · updated
Details

* WHAT...For the Coastal Flood Warning, significant coastal flooding expected. For the High Surf Warning, dangerously large breaking waves up to 35 feet for Guam, 20 to 25 feet for Rota, and 15 to 20 feet for Tinian and Saipan. * WHERE...Guam, Rota, Tinian and Saipan. * WHEN...From 5 PM this afternoon to 4 AM ChST Monday. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure will be inundated. Shoreline erosion will occur. Breaking waves can sweep people off their feet, and into dangerous seas. Life- threatening swimming conditions and significant beach erosion can be expected. Coastal inundation of 5 to 7 feet for Guam, 2 to 4 feet for Rota and 1 to 3 feet for Tinian and Saipan is possible along with coastal flooding and beach erosion. * ADDITIONAL DETAILS...Surf is expected to rise rapidly to dangerous levels tonight. Coastal impacts to the western coasts of Guam and Rota are highly dependent on the final track of Champi; passage south of Guam would be reduced impacts whereas passage over Guam would result in larger coastal inundation.

What to do: Everyone should remain out of the water due to life-threatening surf conditions. Stay well away from the coast.

CFW Guam; Rota; Tinian; Saipan Oct 19, 4:00 AM NWS Tiyan GU
High Surf WarningModerate · updated
Details

* WHAT...For the Coastal Flood Warning, significant coastal flooding expected. For the High Surf Warning, dangerously large breaking waves up to 35 feet for Guam, 20 to 25 feet for Rota, and 15 to 20 feet for Tinian and Saipan. * WHERE...Guam, Rota, Tinian and Saipan. * WHEN...From 5 PM this afternoon to 4 AM ChST Monday. * IMPACTS...Numerous roads may be closed. Low-lying property including homes, businesses, and some critical infrastructure will be inundated. Shoreline erosion will occur. Breaking waves can sweep people off their feet, and into dangerous seas. Life- threatening swimming conditions and significant beach erosion can be expected. Coastal inundation of 5 to 7 feet for Guam, 2 to 4 feet for Rota and 1 to 3 feet for Tinian and Saipan is possible along with coastal flooding and beach erosion. * ADDITIONAL DETAILS...Surf is expected to rise rapidly to dangerous levels tonight. Coastal impacts to the western coasts of Guam and Rota are highly dependent on the final track of Champi; passage south of Guam would be reduced impacts whereas passage over Guam would result in larger coastal inundation.

What to do: Everyone should remain out of the water due to life-threatening surf conditions. Stay well away from the coast.

not sent over EAS Guam; Rota; Tinian; Saipan Oct 19, 4:00 AM NWS Tiyan GU

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About these alerts

  • Straight from the National Weather Service's CAP alert feed (api.weather.gov), refreshed every two minutes. Only actual alerts are shown, not tests or exercises.
  • The EAS code is the event code in the alert's SAME header (for example TOR, SVR, FFW). Alerts the Weather Service doesn't send over EAS, such as most advisories, show "not sent over EAS".
  • Whether your station relays an alert depends on your state EAS plan and how your decoder is set up.

Alert text is from the National Weather Service. Not a product of the NWS or the FCC.