8:15 a.m. Heavy Rainfall Expected by Midweek; Small Craft Advisory in Effect

The National Weather Service (NWS) Guam Weather Forecast Office continues to monitor a tropical disturbance that is expected to move toward the Marianas in the next few days and bring heavy downpours to the area around midweek. 

 Moderate uncertainty remains regarding potential rainfall impacts but locally heavy rainfall of 5 to 8 inches remain a possibility across the Marianas by the weekend. Flash flooding remains a possibility Wednesday through Saturday. Residents and visitors are advised to take the following precautionary actions:

8:50 a.m. Heavy Rainfall Anticipated to Develop Around Midweek as Disturbance Approaches

The National Weather Service (NWS) Guam Weather Forecast Office continues to monitor Invest 99W, a weak circulation near 12N147E, southeast of Guam. It has been downgraded to sub-low by the Joint Typhoon Warning Center, reflecting a decreasing potential for this disturbance to become a significant tropical cyclone. The NWS notes computer models still point to a disturbance to eventually take shape to the south of Guam by midweek, that is anticipated to lift north or northwest, bringing increasing showers and winds to the Marianas as early as Tuesday. 

4:10 p.m. Heavy Rainfall Expected Late in the Weekend through Next Week

The National Weather Service (NWS) Guam Weather Forecast Office issued a hydrologic outlook for Guam, Rota, Tinian, and Saipan.

A tropical disturbance, Invest 99W, is centered east-southeast of Guam near 10.6N 152.8E. This system remains disorganized, but it is expected to move toward the Marianas late this weekend into next week. 99W is expected to bring heavy rainfall to the Marianas from Sunday night through at least Thursday night.

1:20 p.m. Increased Showers Expected Next Week

The National Weather Service (NWS) Weather Forecast Office Guam is currently monitoring two tropical disturbances in the region.

The first system, Invest 98W, is a weak, but broad circulation that continues to slowly develop in southeastern Yap State near 7N144E. Heavy, gusty showers are mainly expected across Yap State and Palau the next few days. At this time, no direct impacts are expected for the Marianas from this system.

8:40 a.m. GHS/OCD, NBG, and AAFB to Conduct Routine Testing of Advanced Warning Systems

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), U.S. Naval Base Guam (NBG), and Andersen Air Force Base (AAFB) will conduct routine testing of the vital communication and advance warning system sirens, respectively, on Tuesday, November 4, 2025, starting at 3:15 p.m.

 GHS/OCD will test the All Hazards Alert Warning System (AHAWS) sirens in conjunction with NBG and AAFB monthly routine testing of the “Giant Voice (GV)” sirens.

Press Release - No Immediate Threat to Marianas Assessed from Reported North Korea Launch

No Immediate Threat to Marianas Assessed from Reported North Korea Launch

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), in conjunction with the Mariana Regional Fusion Center (MRFC), federal and military partners, continue to monitor events surrounding the region including reports of the recent launch of an unidentified projectile out of the Democratic People’s Republic of Korea (DPRK) today. 

8:45 a.m. Flood Advisory in Effect for Guam; Crews Continue to Work on East Agana Landslide

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for southern and central Guam until 10:30 a.m. this morning. Between 2.4 and 4.6 inches of rain have fallen.

A flood watch remains in effect for Guam and Rota through late tonight. Flooding caused by excessive remains possible. Rainfall of 3 to 5 inches is possible over Guam and Rota through early Thursday morning.

The community is advised to take the following precautionary actions:.

5:40 a.m. Flood Warning in Effect for Guam; Landslide Reported in East Agana

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood warning, in effect for Guam until 7:30 a.m. this morning.

An unsettled pattern caused by a passing tropical disturbance, Invest 96 W, is producing heavy showers and thunderstorms. Between 2 and 3 inches of rain has already fallen. Additional rainfall amounts of 1.5 to 2 inches are possible across Guam in the next 1 to 2 hours. Flash flooding is ongoing or expected to begin shortly.

The community is advised to take the following precautionary actions:.

7:30 a.m. No Tsunami Threat to Marianas from Distant Earthquake

The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 7.6 that occurred near the Drake Passage with a depth of 10.5 km, at 6:29 a.m. (ChST).

As advised by the Pacific Tsunami Warning Center, there is no tsunami threat to Guam and the CNMI from this earthquake. 

This will be the final statement issued by GHS/OCD unless additional information is received.

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