Active Weather Alerts
Special Weather Statement
Issued: 7:38 AM Nov. 4, 2025 – National Weather Service
...DEVELOPING CIRCULATION TO MOVE TOWARDS THE SOUTHERN MARIANAS WEDNESDAY AFTERNOON THROUGH THURSDAY NIGHT... ...HEAVY SHOWERS, GUSTY WINDS, AND CHOPPY SEAS EXPECTED... Overview: A low-level circulation (Invest 90W) is now centered near 9N143E remains the subject of a Tropical Cyclone Formation Alert from the Joint Typhoon Warning Center. This means the formation of a tropical cyclone is likely within the next 24 hours. This system is expected to move northwest before turning west-northwest near or south of the Marianas. Winds: Increasingly gusty easterly winds will become southeasterly Wednesday night into Thursday with sustained winds of 20 to 30 mph, with gusts to 40 mph possible. Further increases in the wind fields could be possible if 90W were to track further north closer to the Marianas. Rainfall: Periods of heavy rainfall with 4 to 8 inches of accumulation is possible through Friday. This could lead to an increased risk of mudslides across steeper terrain. Seas: Seas of 5 to 8 feet will increase to 10 to 12 feet Wednesday night as stronger winds move into the area. Conditions will become hazardous to small craft late Wednesday evening or Wednesday night. Suggestions: Secure loose items and stay informed and alert of the latest information from the National Weather Service in Guam and your local officials.
Rip Current Statement
Issued: 6:58 AM Nov. 4, 2025 – National Weather Service
...HIGH SURF ADVISORY IN EFFECT FROM 4 AM WEDNESDAY TO 4 PM CHST FRIDAY... ...HIGH RIP CURRENT RISK IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY AFTERNOON... * WHAT...Large breaking waves of 9 to 11 feet and dangerous rip currents expected. * WHERE...South facing reefs of the Marianas. * WHEN...From 4 AM Wednesday to 4 PM ChST Friday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...As Invest 90W passes southwest of Guam, surf conditions are expected to deteriorate along south facing reefs firsts then east reefs and eventually west reefs. This, coupled with king tides, may produce minor runup along these reefs. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. 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: 6:58 AM Nov. 4, 2025 – National Weather Service
...HIGH SURF ADVISORY IN EFFECT FROM 4 AM WEDNESDAY TO 4 PM CHST FRIDAY... ...HIGH RIP CURRENT RISK IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY AFTERNOON... * WHAT...Large breaking waves of 9 to 11 feet and dangerous rip currents expected. * WHERE...South facing reefs of the Marianas. * WHEN...From 4 AM Wednesday to 4 PM ChST Friday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...As Invest 90W passes southwest of Guam, surf conditions are expected to deteriorate along south facing reefs firsts then east reefs and eventually west reefs. This, coupled with king tides, may produce minor runup along these reefs. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rip currents will be life threatening. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. 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. &&
Small Craft Advisory
Issued: 6:56 AM Nov. 4, 2025 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST FRIDAY... * WHAT...Southeast winds 20 to 30 kt with gusts up to 40 kt and seas 10 to 12 feet. * WHERE...Guam and Rota Coastal Waters. * WHEN...Until 4 PM ChST Friday. * IMPACTS...Conditions will be hazardous to small craft. * ADDITIONAL DETAILS...Winds are expected to to transition from east to south over the next few days as Invest 90W passes nearby to the southwest of Guam. As 90W approaches, winds and seas will become more hazardous and this may cause conditions become hazardous for Tinian and Saipan coastal waters around Wednesday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid boating in hazardous conditions. &&
Flood Watch
Issued: 7:23 PM Nov. 3, 2025 – National Weather Service
...FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY AFTERNOON... * WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Guam and Rota. * WHEN...From late tonight through Friday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Heavy to locally heavy rainfall is expected for Guam and Rota due to a tropical disturbance, Invest 90W, passing just south of Guam this week. Invest 90W continues to consolidate and organize as it moves northwest towards the Marianas. Some of the showers and thunderstorms associated with Invest 90W could result in localized flash flooding, particularly across Guam. Rainfall of 4 to 8 inches with locally higher amounts is possible over Guam and Rota from Tuesday night through Friday afternoon. - Http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. &&
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