Storm Information

*We changed the name from Typhoon to Storm to give better idea of the strength of the storm.

10/08/2023 As of 7 A.M. in the morning, Tropical Storm Bolaven was located 605 miles east-southeast of Guam, moving west at 5 mph with maximum sustained wind of 40 mph. It is expected to maintain its course with increase in forward speed through late Monday. It is expected to become a typhoon by late Monday or early Tuesday. 

As of 3:50 pm 10/8/2023

We are expected to go to COR2 around 8 PM tonight. 

GDOE is preparing to open emergency Shelters. (see release 2) Scheduled to open 6 PM on Monday.

At 1pm, Tropical Storm Bolaven was locate around 610 miles east south-east of Guam, moving at 5 mph west-northwest. 

Maximum winds are forecast at 40 mph. It is expected to intensify tonight and becoming a typhoon by late Monday or Tuesday morning. It is expected to pass the Marianas late Tuesday. 

As of 7:00 pm 10/8/2023

Governor signs signs Executive Order No. 2023-11: relative to declaring a state of emergency in anticipation of the approach of Tropical Storm Bolaven.

As of 7 p.m., Tropical Storm Bolaven was located near 9.7 degrees north latitude and 152.2 degrees east
longitude, about 565 miles east-southeast of Guam, moving west at 8 mph, with maximum sustained winds of
45 mph. It is expected to maintain this general course with a slight increase in forward speed through Monday
afternoon. Bolaven is forecast to intensify through Monday, possibly becoming a typhoon by Monday night.
Current forecast tracks have Bolaven passing through the Marianas late Tuesday.

Although it is estimated to pass over Rota, Tropical Storm Bolaven should not be underestimated. All islands will feel the passage of Bolaven, but any one,or two, islands could face a direct hit (maximum intensity). A typhoon watch remains in effect for Guam, Rota, Tinian, and Saipan. A typhoon watch means that there is a high possibility for damaging (39 mph) and/or destructive (58 mph) winds and heavy rains. This is expected as early as Tuesday morning.

As of 7:00 am 10/9/2023 (Pacific Daily News 10/9/2023)

Tropical Storm Bolaven was expected to intensify before passing between Rota and Tinian as a typhoon overnight Tuesday, and forecasters were warning residents on Guam to expect high winds, heavy rain and dangerous surf.

"Because the storms are usually weaker on the left side, that's going to the side that Guam ends up on," National Weather Service Senior Forecaster Paul Stanko said Monday morning. "And especially with the giant debris pile in Tiyan still being very sizable, that's going to work hugely in our favor."

As of 5 a.m. Monday, Bolaven was located at 10.9 degrees north latitude and 151.1 east longitude, 460 miles east-southeast of Guam. Bolaven was moving northwest at 8 mph with maximum winds of 60 mph. It was expected to make a slight turn toward the northwest with an increase in forward speed through Tuesday.

As of 09:00 am 10/9/2023 (Pacific Daily News)

A tropical storm warning is now in effect for Guam, which means within 24 hours, winds between 39 and 73 miles per hour are expected and typhoon force winds are possible, according to the National Weather Service and the Joint Information Center. Tropical Storm Bolaven was expected to intensify before passing between Rota and Tinian as a typhoon overnight Tuesday, NWS said. "Tropical Storm Bolaven should not be underestimated. All islands will feel the passage of Bolaven, but any one, or two, islands could face a direct hit, maximum intensity," according to the latest JIC statement Monday morning.

At this time, the closest point of approach to Guam is 8 p.m. Tuesday, JIC said, but this could change. The onset of tropical storm conditions could start as early as mid-morning Tuesday, and lasting through Wednesday, NWS said. A typhoon watch remains in effect for Guam, Rota, Tinian and Saipan as all four islands still have the possibility of winds going over 74 mph. It picked up speed overnight and is now moving at a speed of 8 mph.

As of 7 a.m., Bolaven was located near 10.9 degrees north latitude and 151.1 degrees east longitude. That's about 460 miles east-southeast of Guam and about 465 miles southeast of Tinian and Saipan, according to the NWS’ Weather Forecast Office in Guam. Bolaven was moving northwest at 8 mph, with maximum sustained winds of 60 mph. It is tracking a northward shift, but it still may land in any of the islands as a Category 1 or 2 typhoon, according to Marcus Landon Aydlett, a warning coordination meteorologist with the National Weather Service.

As of 1:00 PM 10/9/2023 (JIC)

As of 1 p.m., Tropical Storm Bolaven was located near 11.1 degrees north latitude and 149.9 degrees east longitude, about 380 miles east-southeast of Guam, moving west-northwest at 10 mph, with maximum sustained winds of 65 mph. Bolaven is forecast to intensify through tonight, possibly becoming a typhoon Tuesday morning.

Tropical storm force winds of 39 mph or more are expected for Guam as early as Tuesday midday and lasting through Wednesday. At this time, the closest point of approach to Guam is 8 p.m. Tuesday. This could change. 

Tropical Storm Bolaven should not be underestimated. All islands will feel the passage of Bolaven, but any one, or two, islands could face a direct hit (maximum intensity).

As of 4:00 PM 10/9/2023 (JIC)

As of 4 p.m., Tropical Storm Bolaven was located near 11.4 degrees north latitude and 149.2 degrees east longitude, about 330 miles east-southeast of Guam, moving west-northwest at 10 mph, with maximum sustained winds of 65 mph. Bolaven is forecast to intensify through Tuesday, possibly becoming a typhoon Tuesday morning.

Tropical storm force winds of 39 mph or more are expected for Guam as early as Tuesday midday and lasting through Wednesday. At this time, the closest point of approach to Guam is 8 p.m. Tuesday. This could change. 

As of 10:00 PM 10/9/2023 (JIC)  COR 1 announced at 10:00Pm

As of 7 p.m., Tropical Storm Bolaven was located near 11.5 degrees north latitude and 149.0 degrees east longitude, about 315 miles east-southeast of Guam, moving west-northwest at 12 mph, with maximum sustained winds of 70 mph. Bolaven is forecast to intensify through Tuesday, possibly becoming a typhoon late tonight or early Tuesday morning.

Tropical storm force winds of 39 mph or more are expected for Guam by Tuesday midday and lasting through
Wednesday morning. At this time, the closest point of approach to Guam is 8 p.m. Tuesday.

As of 07:00 AM 10/10/2023 (JIC) COR 1

As of 7 a.m., Tropical Storm Bolaven was located near 13.4 degrees north latitude and 147.0 degrees east longitude, about 150 miles east of Guam, moving northwest at 16 mph, with maximum sustained winds of 70 mph. Bolaven is forecast to intensify through Wednesday afternoon, possibly becoming a typhoon later today. 

On its current track, Bolaven is anticipated to pass between Rota and Tinian.

As of 1:00 PM 10/10/2023 (JIC) COR 1

As of 1 p.m., Bolaven has been upgraded to a typhoon. Typhoon Bolaven was located near 14.0 degrees north
latitude and 146.0 degrees east longitude, about 90 miles east-northeast of Guam, moving northwest at 15 mph,
with maximum sustained winds of 80 mph.

On its current track, Bolaven is anticipated to pass north of Rota, between Rota and Tinian.

As of 9:00 PM 10/10/2023 (JIC) COR 1

As of 7 p.m., Typhoon Bolaven was located near 14.8 degrees north latitude and 145.4 degrees east longitude, about 90 miles north-northwest of Guam, moving northwest at 14 mph, with maximum sustained winds of 80 mph. Bolaven is passing between Rota and Tinian and is now entering the Philippine Sea. Bolaven`s motion will slowly pull it away from Tinian and Saipan overnight.

A flash flood warning remains in effect for Guam until 10:15 p.m. Between 2.5 and 5.7 inches of rain has fallen.
Additional rainfall amounts of 2 to 4 inches are possible. Flash flooding is ongoing. The community is advised
to remain off the roadways through the evening.

As of 07:00 AM 10/11/2023 (National Weather Services)

The Typhoon Watch and the Tropical Storm Warning for Guam are canceled as of 800 AM ChST. A Tropical Storm Warning is now in effect for Agrihan, Pagan and Alamagan.

A Typhoon Warning remains in effect for Rota, Tinian and Saipan. A Tropical Storm Warning is now in effect for Agrihan, Pagan, and Alamagan.

As of 07:00am the center of Typhoon Bolaven was located near Latitude 16.4 degrees North and Longitude 144.3 degrees East. Bolaven is moving north-northwest at 10 mph. It is expected to maintain this general course and speed over the next 24 hours.

Maximum sustained winds have increased to 115 mph. Bolaven is forecast to intensify through Thursday afternoon.

When is COR 4?
Guam will remain in COR 1 this evening. The community is advised to remain indoors and off the roadways, even if damaging winds and rains subside through the night. At first light on Wednesday, October 11, Governor Leon Guerrero will do a windshield assessment of damages.

Based on current agency reports and guidance from the National Weather Service, Governor Leon Guerrero anticipates declaring COR 4 at 10 a.m., Wednesday, October 11, 2023. Government of Guam operations will resume at 10 a.m.

Quick lesson: 

Difference between Tropical Depression, Storm and Typhoon:

If sustained winds increase to 25 mph (40 kph), the storm is called a 'tropical depression. ' When the wind speeds reach 39 mph (63 kph) it is classified a 'tropical storm. ' Above 74 mph (119 kph), they are categorized as a typhoon.

• Tropical Depression: 25 - 38 mph wind
• Tropical Storm: 39 - 74 mph winds
• Typhoon: Above 74 mph winds

Category: 
Condition of Readiness levels explained

Condition 1 (within 12 hours)
Damaging winds are expected within 12 hours or are occurring. No outdoor activities allowed, except for extreme emergencies.

Condition 2 (within 24 hours)
Damaging winds impacting the island are possible within 24 hours. COR 2 includes government-wide preparedness checklists are initiated usually prior to the setting of COR 2 in order to complete all COR 2 checklists before COR 1 is set. COR 1 checklists, especially outdoor requirements, are competed simultaneously with COR 2 requirements.

Condition 3 (within 48 hours)
Damaging winds impacting the island are possible within 48 hours. COR 3 government-wide preparedness checklists are initiated usually prior to the setting of COR 3 in order to complete all COR 3 checklists before COR 2 is set.

Condition 4 (normal, 72 hours)
Damaging winds (39 mph sustained winds or higher) impacting the island are possible within 72 hours. Due to the risk of tropical cyclones developing and impacting the island with destructive winds within 72 hours any part of the year, the normal Condition of Guam is COR 4.

To all Horizon Townhouses Owners, and Tenants:

Object outside

Please start securing your property. Do not leave anything out on the patios. All furniture plants etc needs to be put inside your unit by Monday. Secure typhoon shutters on Monday. 

Do not leave any items on the common area (property) of the Horizon Townhouses. All items need to be safely secured and placed inside your unit. You may not leave any items outside your unit or within the outside perimeters of the buildings that are not tide down or securely fastened to the wall.  

• No Toys (Big, small, bicycles, etc., )
• No BBQ grills, chairs, table stands, or any personal items not belonging to the association
• any objects. Trash bins should be stored inside your patio or inside your unit.