[Tornado Advisory] Southern Chiba Prefecture: Atmospheric conditions are unstable; a tornado advisory is currently in effect.

2026/09/28 13:47

An autumn rain front extends from northern Kyushu to the southern coast of Honshu and is moving eastward. Warm, moist air is flowing toward the front, causing atmospheric instability in the southern part of Chiba Prefecture.



As of 1:30 PM, a tornado advisory has been issued for southern Chiba Prefecture; weather conditions are conducive to the formation of tornadoes and other violent gusts of wind.



If you notice signs of approaching cumulonimbus clouds?such as thunder or sudden shifts in the wind?please take steps to ensure your safety, such as moving into a sturdy building. Also, be alert for lightning, hail, and sudden heavy rain.
In the unlikely event that a tornado approaches while you are indoors, close windows and curtains, move away from windows to a windowless room, or take cover under a sturdy desk while protecting your head.
If you are outdoors, it is crucial to seek shelter behind a sturdy building to protect your head and neck. Sheds, garages, and prefabricated structures are dangerous; if no other shelter is available, lie flat in a ditch or behind a solid object.

Stationary autumn rain front brings continued rain to Eastern and Western Japan; caution advised regarding landslides and fallen trees due to prolonged rainfall.

2026/09/28 11:08

An autumn rain front is stalling near the southern coast of eastern and western Japan, bringing rain to the surrounding areas.
Today, Sunday the 27th, active rain clouds are moving over the Kyushu region; Omuta City in Fukuoka Prefecture recorded "very heavy rain" of 71.0 mm in the hour leading up to 5:34 AM.



The autumn rain front is expected to remain stalled near the southern coast of eastern and western Japan from tomorrow, Monday the 28th, onwards. Warm, moist air associated with a typhoon moving northward will flow into the front, likely intensifying its activity.
Tomorrow, Monday the 28th, the front will shift slightly northward near eastern Japan, bringing rain to a wide area stretching from the Kanto region to western Japan; rainfall may intensify locally, accompanied by thunderstorms.
Please remain alert for landslides, flooding in low-lying areas, and rising or overflowing rivers.
Also, be cautious of lightning strikes and violent gusts of wind, such as those associated with tornadoes. If you hear thunder or notice other signs that a developed cumulonimbus cloud is approaching, please move into a sturdy building to ensure your safety.



Typhoons and tropical depressions are also marked with the "Low" (L) symbol.

Subsequently, the front is expected to shift slightly northward and stall near Honshu. While there is still some uncertainty regarding the projected path of Typhoon No. 26, it is forecast to move east-northeastward south of Honshu.
The Kanto region is likely to experience continued rain until around Thursday, October 1, due to the influence of a weather front and Typhoon No. 26. Please be sure to check the latest weather information.
By around Friday, October 2, as the typhoon moves away to the east of Japan, the Kanto region will come under the influence of a high-pressure system, and sunshine is expected to return.



# Beware of landslides caused by prolonged rain
The Kanto region, in particular, has seen continuous rainfall since the beginning of the month, with record-breaking downpours in areas such as Chiba Prefecture.
In areas where the ground has loosened due to prolonged rain, there is a risk of landslides occurring even with minor additional rainfall. Please avoid approaching dangerous areas such as steep slopes or cliffs. Additionally, on days when heavy rain is forecast, please pay close attention to disaster prevention weather information and evacuation notices issued by local authorities.

# Beware of fallen trees caused by prolonged rain
When the ground loosens due to prolonged rain (meaning the soil becomes soft from high moisture content), trees rooted in the soil lose their structural support and become prone to falling. Consequently, the risk of trees toppling increases during strong winds.
In addition to avoiding steep slopes, stay away from leaning trees and trees growing in areas where the soil is waterlogged.
Since structural instability may not always be visible to the naked eye, please exercise extra caution on days with heavy rain or strong winds.

[Typhoon Information] Latest forecast track for Typhoon No. 26: Approaching Okinawa and Amami with very strong intensity.

2026/09/28 11:06

As of 6:00 a.m. today, Monday the 28th, Very Strong Typhoon No. 26 (Surigae) is located approximately 110 km northwest of Minamidaito Island. Accompanied by a gale-force wind zone, it is moving east-northeast at a speed of about 20 km/h. The typhoon has a central pressure of 945 hPa, with maximum sustained winds of 50 m/s near the center and peak gusts reaching 70 m/s.

Typhoon No. 26 is expected to pass north of Minamidaito Island and move east-northeast across the waters south of Japan tomorrow, Tuesday the 29th. While there is still some uncertainty regarding its subsequent path, there is a possibility that it could approach and impact the vicinity of Honshu around October 1st (Thursday) or 2nd (Friday).
Even if the typhoon tracks well to the south of Honshu, the flow of warm, moist air from the typhoon toward the autumn rain front could intensify the front's activity.

# Typhoon No. 26 ? Monday, the 28th, 6:00 AM
---------------------------------
Intensity: Very strong
Center location: Approx. 110 km northwest of Minamidaito Island
Movement: Moving east-northeast at 20 km/h
Central pressure: 945 hPa
Max. wind speed: 50 m/s (near the center)
Max. instantaneous wind speed: 70 m/s
---------------------------------



Typhoon No. 26 is currently located approximately 110 km northwest of Minamidaito Island; it is moving east-northeast with "very strong" intensity and an associated storm zone.
Rain clouds associated with the typhoon itself are affecting the Daito Islands region, bringing rainfall.

Winds are also intensifying; at 6:32 AM, a maximum instantaneous wind speed of 29.8 m/s was recorded at Kitadaito in Kitadaito Village, Shimajiri District, Okinawa Prefecture.
Please refrain from going out unless absolutely necessary and stay indoors in a safe location.

In the Okinawa region today, Monday the 28th, please be on alert for high waves accompanied by swells, and exercise caution regarding strong winds. Please also be alert for lightning strikes and violent gusts, such as those associated with tornadoes. If there are signs that a developed cumulonimbus cloud is approaching, please take steps to ensure your safety, such as moving indoors.

[Wave Forecast]
Rough to very rough seas, accompanied by swells, are expected in parts of the Okinawa and Amami regions.
Forecast wave heights for today, the 28th (Mon):
Amami region: 4m (with swells)
Okinawa region: 7m (with swells)

Forecast wave heights for tomorrow, the 29th (Tue):
Okinawa region: 5m (with swells)

[Wind Forecast]
Very strong winds are expected in parts of the Okinawa region.
Forecast maximum wind speeds (peak instantaneous wind speeds) for today, the 28th (Mon):
Okinawa region: 23 m/s (35 m/s)

Forecast maximum wind speeds (peak instantaneous wind speeds) for tomorrow, the 29th (Tue):
Okinawa region: 15 m/s (25 m/s)
Winds may intensify further depending on the typhoon's path.

Please pay close attention to future disaster prevention weather information.

[Latest Typhoon Information] Typhoon No. 26 has intensified into a "very strong" storm. Okinawa Main Island and the Daito Islands region should brace for stormy weather through tomorrow; the storm is then expected to move northeastward south of Honshu.

2026/09/27 17:41

As of 4:00 PM today, Sunday, the 27th, Typhoon No. 26 (Surigae)?classified as "very strong"?is estimated to be moving northeast at 15 km/h over the waters approximately 100 km south-southeast of Naha City. Residents of the Okinawa main island and the Daito Islands region need to remain alert and cautious regarding prolonged strong winds and high waves.

------------------------------------
Typhoon No. 26 ? As of 4:00 PM, Sunday, September 27
Center Location: Approx. 100 km south-southeast of Naha City
Size Classification: N/A
Strength Classification: Very Strong
Movement: Northeast at 15 km/h
Central Pressure: 960 hPa
Max. Wind Speed: 45 m/s (near center)
Max. Instantaneous Wind Speed: 60 m/s
------------------------------------



The typhoon is expected to continue moving northeast through the waters near the Okinawa main island. Although it is forecast to weaken to "strong" status by tomorrow, Monday the 28th, it is expected to pass between the Okinawa main island and the Daito Islands region at a relatively slow speed of around 15 km/h, raising the risk of prolonged impacts.

Caution is advised regarding strong winds, gale-force winds, and high waves accompanied by swells in the Okinawa Main Island and Daito Islands regions. The Daito Islands region, in particular, may experience severe weather conditions, peaking tomorrow as the storm makes its closest approach. Please be extremely vigilant against flying debris, fallen trees, and power outages; it is advisable to move items that could easily be blown away indoors today.




Additionally, active rain clouds are visible near the center of the typhoon. These clouds may affect the Daito Islands region tomorrow, the 28th (Monday), necessitating caution regarding heavy rain. Evacuating after winds and rain have intensified is dangerous; please pay close attention to information from local authorities and prioritize early evacuation.

Looking further ahead, the forecast circle is notably large for the period between the 30th (Wednesday) and October 2nd (Friday). This does not represent the physical size of the typhoon itself, but rather indicates a high degree of uncertainty in the forecast.

The latest predictions suggest the typhoon will not approach Honshu as closely as initially anticipated; however, if it follows a more northerly path, there is a possibility it could approach the Pacific coast of Honshu.
Furthermore, an autumnal rain front is currently stalled near the southern coast of Honshu. While the typhoon is located south of Honshu, warm, moist air will flow toward this front, potentially causing rain clouds to develop and intensifying rainfall in the area.
As there is a possibility of heavy rain reaching warning levels, please continue to check for the latest updates regularly.

Risk of linear precipitation zones developing in Fukuoka and Kumamoto Prefectures—exercise extreme caution regarding heavy rain disasters!

2026/09/27 13:26

A low-pressure system is located over the northern Sea of ??Japan and is moving eastward.
A high-pressure system lies east of the Kuril Islands, extending its influence toward northern Japan.
An autumn rain front stretches from the Asian continent, across Kyushu, and out to the waters east of Japan. A low-pressure system has formed along this front near the Tsushima Strait and is moving eastward.
Typhoon No. 26 is located south of Okinawa and is moving northeastward.



Today, the 27th (Sunday), the low-pressure system over the Sea of ??Japan is Today, Sunday the 27th, moist air from Typhoon No. 26 is intensifying the activity of the autumn rain front, causing heavy rainfall, particularly in northern Kyushu. Very intense rain has been recorded, with hourly precipitation reaching 71.0 mm in Omuta City, Fukuoka Prefecture, and 66.5 mm in Omura City, Nagasaki Prefecture.



At 9:00 AM today (Sunday the 27th), the Fukuoka Regional Meteorological Observatory and the Kumamoto Local Meteorological Observatory issued a "Meteorological Disaster Prevention Bulletin" (an imminent forecast for a linear precipitation zone). There is an increasing likelihood that a linear precipitation zone will form over the Chikugo region of Fukuoka Prefecture and the Kumamoto region of Kumamoto Prefecture through the early afternoon, bringing continuous, very intense rainfall to the same area. This creates a risk of a rapid escalation in the danger of life-threatening disasters.



Additionally, Level 4 heavy rain warnings and Level 4 landslide warnings have already been issued for some areas. As conditions conducive to rainfall will persist into tomorrow, please remain strictly vigilant against landslides, flooding in low-lying areas, and rising or overflowing rivers.



Please check rain cloud radar forecasts and evacuation information issued by local authorities. Assess your surroundings and move away early from hazardous areas, such as locations near cliffs or rivers. Also, be extremely cautious of potential flooding in underpasses.

Sunday, the 27th: Atmospheric instability due to a front and a typhoon; alert for linear precipitation zones in Kyushu.

2026/09/27 08:12

A low-pressure system is located over the northern Sea of ??Japan and is moving eastward.
A high-pressure system lies east of the Kuril Islands, extending its influence toward northern Japan.
An autumn rain front stretches from the Asian continent, across Kyushu, and out to the waters east of Japan. A low-pressure system has formed along this front near the Tsushima Strait and is moving eastward.
Typhoon No. 26 is located south of Okinawa and is moving northeastward.



Today, the 27th (Sunday), the low-pressure system over the Sea of ??Japan is expected to move northward toward the vicinity of Sakhalin.
Warm, moist air near the front will flow toward a shear line extending from this low-pressure system, likely causing atmospheric instability in northern Japan.

Rain is currently falling in southern Hokkaido, with localized heavy rainfall observed.
Although the rain is expected to weaken by evening, caution is advised regarding localized severe weather, such as lightning strikes, sudden gusts, and hail.



Meanwhile, the stationary autumn rain front is expected to gradually shift southward over eastern Japan, with the area of ??rainfall moving out to sea.
However, the front will remain over the Kyushu region; atmospheric instability?driven by moist air flowing in from Typhoon No. 26?is causing localized heavy rain, and torrential rain has been observed in Nagasaki Prefecture.

A forecast warning regarding the imminent formation of a linear precipitation zone has been issued for Fukuoka, Saga, Nagasaki, and Kumamoto prefectures. Please remain alert to changing weather conditions, as there is a risk of heavy rain that could lead to disasters.



In the Okinawa region, caution and vigilance are required regarding rising waves and strong to violent winds due to the approach of Typhoon No. 26.
Additionally, please be on the lookout for lightning strikes, sudden gusts, and abrupt heavy downpours beneath developing cumulonimbus clouds.

Typhoon No. 26 is expected to reach its point of closest approach to Okinawa Main Island between the night of the 27th (today) and the morning of the 28th (tomorrow), while maintaining strong intensity.
Afterward, it is projected to move northeast and potentially travel along the southern coast of Honshu while remaining a strong typhoon accompanied by a zone of violent winds.



Rain is forecast across a wide area this week due to the influence of a weather front and the typhoon.
There is also a possibility of heavy rainfall depending on the typhoon's path.
Please stay updated with the latest typhoon information.

Torrential rain in Kyushu: Japan Meteorological Agency issues forecast for imminent linear precipitation zone.

2026/09/27 07:57

A low-pressure system is located over the northern Sea of ??Japan and is moving eastward.
A high-pressure system lies east of the Kuril Islands and is extending toward northern Japan.
A stationary front (autumn rain front) stretches from the Asian continent, across Kyushu, and out to the waters east of Japan. A low-pressure system has formed along this front near the Tsushima Strait and is moving eastward.
Typhoon No. 26 is located south of Okinawa and is moving northeast.



In the Kyushu region, where the front is situated, atmospheric conditions have become extremely unstable due to moist air flowing in from Typhoon No. 26, resulting in localized torrential rainfall.
Omura City, Nagasaki Prefecture, has recorded approximately 110 millimeters of rain in a single hour?a level of rainfall capable of triggering disasters.



Furthermore, the Japan Meteorological Agency (JMA) has issued a "Linear Precipitation Zone Forecast" (issued shortly before the phenomenon occurs) as of 6:00 AM today (the 27th).
This alert indicates a high probability that a linear precipitation zone will form within the next three hours over parts of Fukuoka, Saga, Nagasaki, and Kumamoto prefectures, bringing sustained, extremely heavy rain to the same area.

There is a risk of a rapid increase in the danger of life-threatening disasters.
Please stay updated with the latest information, such as the JMA's "Kikikuru" (Hazard Map for Sediment-related Disasters and Inundation) service.

Typhoon No. 26 is developing and moving northward, raising concerns about high waves and strong winds in Okinawa.

2026/09/26 21:44

As of 6:00 PM on the 26th, Typhoon No. 26 (Surigae) is moving northward at approximately 10 km/h over the waters south of Okinawa.
It has a central pressure of 990 hPa, with maximum sustained winds of 30 m/s near the center and maximum instantaneous wind gusts of 40 m/s.

The typhoon is expected to intensify as it moves north and gradually shifts its course toward the northeast.
There is a risk that it will approach the Nansei Islands with strong intensity around the 29th.



In the Nansei Islands, caution is required regarding high waves accompanied by swells from the 27th through around the 30th.
Please also remain alert for strong winds, storm surges, landslides, flooding in low-lying areas, and rising river levels.
[Wave Forecast]
Rough seas accompanied by swells are expected in some areas of the Nansei Islands.
Forecast wave heights for the 27th:
Okinawa region: 6 meters (with swells)
Forecast wave heights for the 28th:
Okinawa region: 7 meters (with swells)
Amami region: 5 meters (with swells)
Rough sea conditions are expected to persist in some areas through around the 30th.



[Wind Forecast]
Very strong winds are expected in some areas of the Nansei Islands. Forecast maximum wind speeds (peak instantaneous wind speeds) for the 27th:
Okinawa region: 23 m/s (35 m/s)
Forecast maximum wind speeds (peak instantaneous wind speeds) for the 28th:
Okinawa region: 23 m/s (35 m/s)
Amami region: 23 m/s (35 m/s)
Very strong winds are expected to continue in some areas through around the 30th.

[Rainfall Forecast]
Heavy rain is expected in parts of the Okinawa region.
Forecast 24-hour rainfall totals (maximum amounts) from 18:00 on the 27th to 18:00 on the 28th:
Okinawa region: 80 mm
Forecast 24-hour rainfall totals (maximum amounts) from 18:00 on the 28th to 18:00 on the 29th:
Okinawa region: 80 mm

Depending on the typhoon's movement, rainfall and wind speeds could exceed forecasts.
Please stay updated with the latest weather information and take precautions against the typhoon.

[Typhoon Information] Latest forecast track for Typhoon No. 26: Approaching the Okinawa region while intensifying—please prepare early.

2026/09/26 13:42

As of 12:00 PM today, Saturday the 26th, Typhoon No. 26 (Surigae) is located south of Okinawa and is moving northwest at a speed of approximately 10 km/h. The central pressure is 996 hPa, with maximum sustained winds of 25 m/s near the center and maximum instantaneous wind gusts of 35 m/s.

Typhoon No. 26 is expected to intensify as it moves northward south of Okinawa, reaching "strong" intensity as it approaches the Okinawa region around Tuesday the 29th.
While there is still some uncertainty regarding its subsequent path, it is projected to move northeastward south of Japan.



# Typhoon No. 26 ? Saturday the 26th, 12:00 PM
------------------------------------
Center Location: South of Okinawa
Movement: Northwest at 10 km/h
Central Pressure: 996 hPa
Max Sustained Wind: 25 m/s (near center)
Max Instantaneous Wind: 35 m/s
------------------------------------

Winds are expected to gradually strengthen across the Okinawa region. Very strong winds are forecast for the Okinawa Main Island area starting tomorrow, Sunday the 27th, and for the Daito Islands area starting the day after tomorrow, Monday the 28th. Please exercise great caution regarding strong winds. Depending on the typhoon's path, there is a risk of violent winds in the Okinawa Main Island region from tomorrow, the 27th (Sunday), through the day after tomorrow, the 28th (Monday), and in the Daito Islands region from the 28th (Monday) through around the 29th (Tuesday).
Please take precautions against the typhoon before the winds intensify.

Waves are expected to rise gradually in coastal waters across the Okinawa region, leading to rough seas (high waves) in the Okinawa Main Island region from tomorrow, the 27th (Sunday), through the 28th (Monday), and in the Daito Islands region from the 28th (Monday) through around the 29th (Tuesday). Please remain alert for high waves accompanied by swells.
Depending on the typhoon's path, there is also a risk of rough seas in the Miyakojima region tomorrow, the 27th (Sunday). Please exercise great caution regarding high waves accompanied by swells.

In the Okinawa region, rain is expected to begin in some areas today, the 26th (Saturday), due to moist air surrounding the typhoon.
Depending on the typhoon's path, there is a risk of warning-level heavy rainfall in the Okinawa Main Island region on the 28th (Monday). Please exercise great caution regarding landslides, flooding in low-lying areas, and rising river levels.
Please also be alert for lightning strikes and sudden gusts of wind beneath developing cumulonimbus clouds.

Additionally, depending on the typhoon's path, there is a risk of warning-level storm surges in the Okinawa Main Island region from tomorrow, the 27th (Sunday), through the 28th (Monday). Please exercise great caution regarding inundation or flooding caused by storm surges in low-lying areas near the coast and river mouths. [Wind Forecast]
Forecast wind direction and maximum wind speed (peak instantaneous wind speed) for the 26th:
Miyakojima Region: Northeast, 15 m/s (25 m/s)
Forecast wind direction and maximum wind speed (peak instantaneous wind speed) for the 27th:
Miyakojima Region: Northeast, shifting to North, 18 m/s (30 m/s)
Okinawa Main Island Region: East, 23 m/s (35 m/s)
Daitojima Region: Southeast, 17 m/s (30 m/s)
Forecast wind direction and maximum wind speed (peak instantaneous wind speed) for the 28th:
Miyakojima Region: Northwest, 15 m/s (25 m/s)
Okinawa Main Island Region: Northeast, 23 m/s (35 m/s)
Daitojima Region: South, 23 m/s (35 m/s) [Wave Forecast]
Forecast wave heights for the 26th
Okinawa Main Island region: 3m (with swells)
Miyakojima region: 4m (with swells)
Yaeyama region: 3m (with swells)
Forecast wave heights for the 27th
Okinawa Main Island region: 6m (with swells)
Miyakojima region: 5m (with swells)
Yaeyama region: 3m (with swells)
Daito Islands region: 3m (with swells)
Forecast wave heights for the 28th
Okinawa Main Island region: 6m (with swells)
Miyakojima region: 4m (with swells)
Yaeyama region: 3m (with swells)
Daito Islands region: 6m (with swells)




[Rainfall Forecast]
Forecasted 24-hour rainfall totals (maximum amounts) from 12:00 on the 27th to 12:00 on the 28th:
Okinawa Main Island region: 60 mm
Forecasted 24-hour rainfall totals (maximum amounts) from 12:00 on the 28th to 12:00 on the 29th:
Okinawa Main Island region: 60 mm

[Tide Level Forecast]
Forecasted maximum tide level on the 27th:
Okinawa Main Island region: 1.3 m above sea level

Please stay tuned for future disaster prevention weather information and evacuation notices from local authorities.

[Latest Typhoon Information] Typhoon No. 26 is forecast to move northward while intensifying; it is expected to slow down near Okinawa, raising concerns of prolonged impact.

2026/09/26 07:16

As of today, Saturday the 26th, Typhoon No. 26 is moving in a northerly direction over the waters south of Okinawa.

# Typhoon No. 26 ? As of 6:00 AM, Saturday the 26th
====================================
Center location: South of Okinawa
Movement speed: North-northwest at 10 km/h
Central pressure: 996 hPa
Maximum sustained wind speed: 25 m/s (near the center)
Maximum instantaneous wind speed: 35 m/s
====================================



Typhoon No. 26 is expected to move northward while maintaining a gale-force wind zone. By tomorrow, Sunday the 27th, it is forecast to intensify into a "strong" typhoon, with maximum sustained winds near the center reaching 35 m/s or higher.
From the 27th onwards, the storm is expected to gradually shift its course toward the east; due to its slow movement, there is a risk of prolonged impacts in the Okinawa and Amami regions. Starting today, the 26th, coastal waves will gradually rise?accompanied by swells?and winds will also begin to strengthen. Rough weather is expected to persist around Okinawa through approximately the 29th.



Please remain alert for strong winds, high waves, and landslides associated with warning-level heavy rainfall; also, exercise great caution regarding flooding and inundation caused by rising tide levels due to storm surges.

Regarding its subsequent path, the forecast circle is large, indicating a high degree of uncertainty in the prediction. Depending on how the situation develops, the storm could approach the Kyushu or Shikoku regions and feed warm, moist air into the autumnal rain front lingering near Honshu; this could intensify the front's activity and potentially lead to heavy rainfall across Honshu.

Please pay close attention to the latest typhoon information as it becomes available.