Next week, the stormy weather in Kanto and Northern Japan will affect transportation, and there are fears of heavy rain on the alert

2025/07/11 13:05

#Scary weather in Kanto and Northern Japan next week Will transportation be affected There may be fears of heavy rain on the warning level



On Monday the 14th, a low pressure system will move around western Japan.
It is expected that there will be some areas in the East, Western Japan and the Nansei Islands.
Towards the 15th (Tuesday), warm, moist air, tropical air, will flow towards the low pressure system, causing heavy rain, localized, mainly on the Pacific side.
There is a risk of heavy rain at the warning level, especially in the southern Kanto region, where warm and humid air is prone to flowing into the air.



Also, towards the second half of the week, high pressure in the eastern part of Japan will increase and spread out near Japan.
The pressure slope will increase on the Pacific side of the north and eastern Japan, mainly from Tuesday the 15th to Wednesday the 16th, and the wind from the south will increase, causing rough weather and heavy damage.
Please be careful of the latest weather information as it may affect transportation.

Next week, the stormy weather in Kanto and Northern Japan will affect transportation, and there are fears of heavy rain on the alert

2025/07/11 12:49

#Scary weather in Kanto and Northern Japan next week Will transportation be affected There may be fears of heavy rain on the warning level



On Monday the 14th, a low pressure system will move around western Japan.
It is expected that there will be some areas in the East, Western Japan and the Nansei Islands.
Towards the 15th (Tuesday), warm, moist air, tropical air, will flow towards the low pressure system, causing heavy rain, localized, mainly on the Pacific side.
There is a risk of heavy rain at the warning level, especially in the southern Kanto region, where warm and humid air is prone to flowing into the air.



Also, towards the second half of the week, high pressure in the eastern part of Japan will increase and spread out near Japan.
The pressure slope will increase on the Pacific side of the north and eastern Japan, mainly from Tuesday the 15th to Wednesday the 16th, and the wind from the south will increase, causing rough weather and heavy damage.
Please be careful of the latest weather information as it may affect transportation.

The heat is alleviating in the Kanto region; Western Japan continues to heatstroke alert alert alert for Ishikawa, Wakayama and Fukuoka

2025/07/11 10:09

Today, the 11th, the cold eastward wind blowing from the high pressure of the Sea of Okhotsk, temperatures will be modest, especially in the Pacific side of northern Japan and the Kanto region.
The estimated maximum temperature in central Tokyo is 26c, 10c lower than yesterday (7th), when it was a hot day. In central Tokyo, the temperature has been in the 20 C for the first time in about two weeks since June 25th, so it will feel a little easier to spend than before.

Although clouds are likely to spread in Tokai to Western Japan, the heat is expected to continue. In addition, some places may be midsummer days on the Sea of Japan side of Tohoku and Hokuriku, where sunlight is reaching.
The forecast maximum temperatures are 33 C for Kanazawa, 34 C for Nagoya, 34 C for Osaka, 34 C for Kochi, 32 C for Fukuoka.



The Ministry of the Environment and the Japan Meteorological Agency have issued heatstroke warning alerts to Ishikawa, Wakayama, and Fukuoka prefectures.


In areas where a heatstroke warning alert has been issued, significantly higher temperatures can cause damage to human health due to heatstroke.
Please refrain from activities during the hot days as much as possible, and be careful to take frequent breaks, drink water and salt.
Also, make sure to stay in a cool environment, such as using air conditioners indoors, and take full advantage of heatstroke prevention indoors.

Weather today, Friday the 11th: The sky is dominant in the Kanto region; rain is mainly on the Pacific side in western Japan

2025/07/11 06:23

Today, the 11th (Friday), the rainy season front is expected to travel south to the Izu Islands, and the low-pressure area is expected to travel north through the East China Sea.



Hokkaido has a sky pattern where clouds are likely to spread out, but the sun will occasionally arrive.
Clouds tend to spread out on the Pacific Ocean side of Tohoku and Kanto, and the sky is unclear. There are areas where showers are present, so it's safe to have a folding umbrella when going out. On the other hand, the Sea of Japan side of Tohoku and Hokuriku are likely to have strong sunlight.


In Kanto, clouds are likely to spread easily, and the sky will continue to be unclear. It's safe to have a folding umbrella when going out.
Since cold air flows in, you need to be careful about the difference in temperature and yesterday.
Clouds will spread across Tokai, but there will be some time for the sun to reach it. In the afternoon, there are some showers, mainly inland areas and along the mountains, so be careful of changes in the sky.


In western Japan, west air flows through low-pressure areas, making it easy to rain, mainly on the Pacific side. Even if it's not raining when you're out, it's safe to bring a folding umbrella or something.
There is a risk of heavy rain and thunderstorms in southern Kyushu, Okinawa and Amami, so be careful of landslides, flooding of low lands, and rising rivers.

[Kanto Linear Precipitation Zone Predictions] Heavy rain peaks overlapping when you get home today; the risk of disasters increases rapidly; Protect yourself from torrential rain

2025/07/10 11:44

The Japan Meteorological Agency announced before 10am today (Thursday), 10th, "Linear precipitation zones will occur in Ibaraki Prefecture, Tochigi Prefecture, Gunma Prefecture, Saitama Prefecture, Chiba Prefecture, and Tokyo regions from the evening until the beginning of the evening today, Thursday, 10th, and the risk of heavy rain disasters may increase dramatically."

The rainy season front will revive today, Thursday the 10th, and the
front will travel south from the Tohoku region to the Kanto region tomorrow, Friday the 11th.

With the influence of warm, humid air towards the front, rising daytime temperatures and cold air above, the air condition of the
/b is expected to become extremely unstable over a wide area in the Kanto region, especially from the evening.



If you look at the forecast for the rain and wind starting today, the 10th (Thursday), we will see a prediction that
/active rain clouds will appear in red from southern Tohoku to northern Kanto.

Under these rain clouds, nearly 100mm of rain falls in three hours, and
Heavy rain falls all at once in a short period of time,
The risk of heavy rain disasters increases dramatically.



In addition, in the evening, active rain clouds also hit the southern Kanto region, and in central Tokyo, it seems that heavy rain will reach the peak of heavy rain when you get home.

There are places where extremely heavy rain of over 50mm per hour with lightning, and
There is a risk that roads will become like rivers, exceeding the drainage function of urban areas.

If the rain clouds move slowly or stagnate, a linear precipitation zone will occur, and torrential rain may occur.



At night, there will be fewer heavy rains in the north Kanto region, but in southern Kanto region, such as Tokyo and Yokohama, heavy rain is expected to continue, with some areas becoming rainy.



Check out the surrounding rain clouds frequently using the rain cloud radar today.

If heavy rain begins, please stay away from underpasses and underground facilities and on the second floor or above of a sturdy building.

/ Also, try to stay away from the mountains, cliffs and slopes even within your home.



The atmosphere is expected to continue to remain unstable tomorrow, the 11th (Friday), and
Rain is expected to continue to be prone to falling.

However, tomorrow will turn into a north wind, and the temperature will not rise
Tomorrow's highest expected temperature in Tokyo is 25c, which is likely to be quite cool.
Please be careful of changes in temperature.

Atmospheric unstable. From Tohoku to Kanto, from southern Kyushu to Okinawa, from Okinawa to heavy rain.

2025/07/10 08:44

The rainy season front extends from Japan's Tokai to the Tohoku region.
In addition, there are low pressure systems in the south of Japan and around the Sakishima Islands, moving north-northwest and north-east respectively.



The rainy season front is expected to travel south through the Tohoku and Kanto-Koshin regions from Thursday the 10th to tomorrow, Friday the 11th.
In the Tohoku region and eastern Japan, the air condition will likely be extremely unstable today, the 10th (Thursday), due to the influence of warm, humid air flowing towards the front, rising daytime temperatures, and cold air above.


In addition, in western Japan and the Nansei Islands, the air condition is expected to become extremely unstable today, the 10th (Thursday), due to the effects of warm, humid air flowing around the edge of high pressure and rising daytime temperatures.


In the Kanto-Koshin region, on the 10th, beware of low-lying flooding, river flooding and overflowing, and landslides, and beware of the Tohoku region, western Japan and the Nansei Islands.
Also, be careful of severe gusts of wind, such as lightning strikes and tornadoes, and hail fall.



[Rain commentary]
Precency from the start of falling (00:00 on the 8th) to 5:00 on the 10th (preliminary figures from Amedas)
Okinawa Main Island Region


























































































































































































































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[Rain forecast]
From the Tohoku region to the western Japan and the Nansei Islands, there are likely to be some areas where extremely heavy rain and heavy rain accompanied by thunder will fall on the 10th.


The expected 1 hour precipitation on the 10th is high,
: Tohoku Sea of Japan side: 40mm
: Tohoku Pacific side: 40mm
: Northern Kanto region: 60mm
: Southern Kanto region: 50mm
: Koshin region: 50mm
: Miyazaki prefecture: 40mm
: Kagoshima prefecture (excluding Amami region): 40mm
: Amami Beauty region: 40mm
Okinawa main island region: 40mm
Sakishima Islands: 40mm







/B: The expected 1 hour precipitation on the 11th is high,
: Koshin region: 30mm

/Miyazaki prefecture: 40mm
/Kagoshima prefecture (excluding Amami region): 40mm
/B: Amami region: 40mm

The 24-hour precipitation expected from 6:00 on the 10th to 6:00 on the 11th is a high place:
Tohoku region Sea of Japan side: 60 mm
Tohoku region Pacific side: 60 mm
Kanto region Northern region: 120 mm
Kanto region Southern region: 100 mm
Koshin region: 120 mm
Miyazaki prefecture: 150 mm
Kagoshima Prefecture (excluding Amami) 120mm
Amami region 120mm
Okinawa Main Island Region 100mm
Sakishima Islands 80mm

[Disaster Prevention Items]
In the Kanto-Koshin region, be careful of low-reaching land flooding, river flooding and flooding, and landslides on the 10th, and be careful and wary of the Tohoku region, western Japan and the Nansei Islands.
Also be careful of severe gusts of wind, such as lightning strikes and tornadoes.
If there are signs of developing cumulonimbus clouds approaching, try to ensure safety by moving inside the building.
There is a risk of hail falling, so please be careful when managing agricultural crops and agricultural facilities.