The Kanto region is rough. Beware and caution against heavy rain, landslides, flooding, and flooding.

2025/04/02 06:34

There is a high pressure system to the east of the Kuril Island, and it travels northeast.
On the other hand. Japan's southern seas has a developing low pressure system with a front that travels northeast.
Currently, there is rain and snow around Japan from Tohoku to Kanto and Koshinetsu, and there are some areas in Ibaraki Prefecture where heavy rain and flood warnings have been issued.


Today, the low pressure system is expected to develop and progress towards the coast of Sanriku.
In the Kanto region, the air condition is expected to become unstable by the afternoon of the 2nd due to the influence of humid air surrounding the high pressure line to the east of the Kurishima Island.
Please be careful and be careful of landslides caused by heavy rain, flooding of low land, flooding of rivers and flooding in the afternoon.
Also, beware and beware of high waves accompanied by swells in the Kanto region late into the evening of the 2nd.



[Rain commentary]
24-hour precipitation as of 5:00 on the 2nd (preliminary figures from Amedas)
Saitama Prefecture Rain: Urayama, Chichibu City 67.0mm
Tokigawa 57.5mm
Tokorozawa 56.5mm











































































































































































































src="https://www.sunny-spot.net/topics/20250402063239_3.jpg" alt="image" width="720" align="center">



[Rain Prediction]
In the Kanto region, there will be some areas where heavy rain will fall with lightning at the dawn of the second day.
If the rain clouds develop more than expected or if the developed rain clouds continue to show, the area where heavy rainfall level is at the alarm level may expand.

The expected one-hour precipitation on the 2nd is high,
30mm the northern Kanto region: 6am on the 2nd to 6am on the 3rd is high, and
The expected 24-hour precipitation on the 2nd is high,
30mm the expected 30mm the southern Kanto region: 40mm





[Wave forecast]
The expected swells will continue on the 2nd in the Kanto region and the Izu Islands.
If the low pressure system develops more than expected, it could be a major hit at sea in the Kanto region.


Wave height expected on the 2nd
: Kanto region 5 meters with swells






/-With the Kanto region, beware and careful of landslides caused by heavy rain, flooding of low landslides, river flooding and flooding as early as the afternoon of the 2nd.
In the Kanto region, beware and beware of high waves accompanied by swells late on the 2nd.

[Tokyo 5.6c] It will continue to be cold in Kanto due to cold rain tomorrow. When will it start to warm Weekly forecast

2025/04/01 16:44

Today, Tuesday, April 1st, the temperature has not risen, mainly on the Pacific side of the eastern Japan to the Pacific Ocean due to the effects of cold, humid air.



Today, the highest temperature on the 1st is
Tokyo, 5.6c
Yokohama, 6.2c
Saitama, 6.4c
Utsunomiya, 5.0c
Kofu, 7.8c
Sendai, 5.3c
Fukushima, 4.2c
Today, Tuesday, 1st, is as cold as midwinter in various places.

/BOn the other hand, there are some sunny spots in Western Japan, such as Kinki, and
The temperature in Osaka has risen to 16.0 C, making the temperature seem typical of this time of year.


In Kanto and Tohoku, cold rain will fall tomorrow, the 2nd (Wednesday), and the temperature will not rise easily.



If you look at the forecast for the rain, snow and wind at 9am tomorrow, the 2nd (Wednesday)
/Rain clouds are expected to be exposed around the low pressure system moving northward in the Kanto region.

The temperature is not as low as today, but
The temperature will not rise tomorrow due to rain, and there are likely some areas where snow will be mixed in along the mountains in Kanto and Tohoku.


Please take measures against the rain next day, such as rain gear and boots.



From 4th (Friday) to Saturday the 5th, there will be many places where the area is covered in sunny weather.
The cold is easing, and the spring weather looks like it will be a breeze.
On Sunday the 6th, the low pressure system will pass through the area around Honshu again

It is expected to cause wide rain.

However, the rain next Sunday will be high and the weather will likely be spring rain.

In the Kanto-Koshin region, be careful of snow along the mountains; there are areas where heavy rain is in the south.

2025/04/01 07:16

There is a low pressure system off the coast of Tokaido, and it is almost stagnant. In addition, cold air below -3 C flows in near 1,500m above the Kanto-Koshin region, and rain and snow have been falling since morning in the Kanto-Koshin region.


The low pressure will be unclear today, the afternoon of the 1st, but it is expected that the atmospheric pressure valley will stagnate from the coastal part of the Kanto region near the Izu Islands over the next 2nd.
Towards the rim of low pressure and atmospheric valleys, humid air flows around the edge of the high pressure east of the Kuril Island, making the atmosphere unstable.


In the Kanto-Koshin region, heavy snow will occur along the mountains and mountainous areas, and some areas will accumulate on flat areas as early as the evening of the 1st.



[Rain Prediction]
In the Kanto region and the Izu Islands, there will be some areas where heavy rain will fall with thunder until the dawn of the second day. If the rain clouds develop more than expected, or if the developed rain clouds continue to show up, there is a possibility that heavy rain will occur at an alarm level.

+1 hour precipitation expected today (at a high place)
North Kanto region 30mm
South Kanto region 30mm
Izu Islands 30mm
1 hour precipitation expected tomorrow (at a high place)
North Kanto region 30mm
South Kanto region 30mm
South Kanto region 30mm
24 hour precipitation expected until the dawn tomorrow (at a high place)
North Kanto region 120mm
South Kanto region 150mm
Izu Islands 120mm

[ Snow Prediction]
- 24-hour snowfall expected by the dawn tomorrow, the 2nd (at a high point)
Mountains in the northern Kanto region: 25cm
From Hakone to Tama and Chichibu regions: 8cm
Flat land in the southern Kanto region: 1cm
Koshin region: 10cm

#Disaster Prevention Issues
In the Kanto region and the Izu Islands, beware and beware of landslides caused by heavy rain, flooding of low landslides, and rising rivers from today, the morning of the 1st to the afternoon of the 2nd.
In the Kanto-Koshin region, you need to be careful of traffic disruptions due to snowfall or freezing road surfaces, collapse of greenhouses, and snow accumulation on overhead wires, electric wires, and trees today, the evening of the 1st.

Weather today, Tuesday, April 1st: Cold rain in Kanto at the beginning of the new fiscal year, and many sunny places in western Japan

2025/04/01 06:10

Today, Tuesday, April 1st, the start of the new fiscal year, will cause cold rain and snow in eastern Japan, including the Kanto region. It seems that there are areas in Hokkaido and western Japan where the sun is reaching.



Hokkaido and northern Tohoku are likely to be covered in high pressure and are often sunny.
On the other hand, the weather is likely to gradually become more prone to rain and snow in the southern part of Tohoku. It's safe to have rain gear when going out.


In eastern Japan, it is expected to cause widespread cold rain and snow.
There will be some areas where wet snow falls inland and along the mountains, causing heavy snow. You need to be careful of traffic disruptions caused by snowfall or icy road surfaces.
It's been a cold rainy day in Kanto from the morning. The highest temperature in Tokyo is 7 C, which is likely to be as cold as midwinter. If you are going to the entrance or company ceremony, please go out wearing warm clothes.


There are many places in western Japan where sunlight reaches the Sea of Japan side, and it seems that many places are also at temperatures that are typical of this time of year during the day. Clouds are prone to spreading on the Pacific side, and showers are possible in Kinki and Shikoku. When you go out, you'll be safe to have a folding umbrella. It's likely to rain in southern Kyushu around the evening.

Late tonight - the new year starts: snowfall in mountains in southern Kanto

2025/03/31 13:24

Today, the 31st (Monday), cold air below -3 C is flowing into the air above Kanto, Koshin, about 1,500m, which is strong for this time of year.
Also, a low pressure system will occur off the coast of Tokaido by tonight, and it is expected to remain largely stagnant until tomorrow, Tuesday, April 1st.
For this reason, there will be some areas around Kanto, Koshin where cold rain and wet snow will fall until tomorrow, April 1st.



#Snow accumulates late tonight in mountains in Shizuoka Prefecture and southern Kanto region Heavy snow in Yamanashi Prefecture
Snow accumulates in mountains in Shizuoka Prefecture and mountains in the western part of Kanagawa Prefecture, and the snowfall is expected to be 5cm in places with a high 24-hour snowfall.
In Yamanashi Prefecture, there will be areas in the mountains in the central and western parts and in the Fuji Five Lakes in the eastern part of the Fuji peak, and there will be heavy snowfall from the early hours of the 1st to the evening.
24 hours snowfall is expected to be 10cm at a high 24-hour location.



Be careful of traffic disruptions due to snowfall or road icy conditions, and snow accumulation on overhead lines, electric wires, and trees.

Tomorrow, the 1st (Tuesday) is cold rain in the Kanto-Koshin region, and some areas are mixed with snow along the mountains.

2025/03/31 08:51

The area around Honshu is covered by mobile high pressure, and today, the 31st, many areas will be exposed to sunlight, mainly in western Japan.
On the other hand, on the Pacific side of eastern Japan, such as the Kanto and Tokai regions, moist air that circumnavigates the edge of high pressure will flow in, making it likely to be a cloudy day. Due to the predominance of clouds, temperatures do not rise much during the day, and temperatures will be around February to March.



By night, a low pressure system is expected to occur off the coast of Tokaido due to the effects of the valley of atmospheric pressure travelling through Honshu and the humid air from the high pressure.
Due to the influence of this low pressure system, there are areas in the Kanto and Tokai regions where cold showers will fall from night, and the cold rain and snow will expand tomorrow morning.



If you look at the forecast for rain and snow tomorrow morning, the 1st (Tuesday), you will see that sleet and snow are predicted, mainly from southern Tohoku to the inland areas of the Kanto-Koshin region and along the mountains. You need to be careful about snow accumulation caused by wet snow and the condition of the road surface. Cold rain is expected in the plains of southern Kanto, and the highest daytime temperature in central Tokyo is expected to be 8 C, making it colder than 10 C.

/April is likely to start in southern Tohoku, Kanto, Koshin, Hokuriku, and Tokai, as cold as midwinter. Please be careful not to disrupt your health.

Cherry blossom development schedule in Tokyo: 5 days earlier than last year, first in Kanto

2025/03/30 23:41

On the 30th (Sunday), it was announced that the cherry blossoms were in full bloom in Tokyo. The flowers were in full bloom six days after the announcement of their blossoms on the 24th of this month.
This is the first announcement of the full bloom in Kanto this year.

/B On the same day, the cherry blossoms were announced in full bloom in Wakayama and Matsuyama.

#Cherry blossoms in full bloom Presentation point (30th)
Tokyo: 1 day earlier than normal, 5 days earlier than last year Yasukuni Shrine
Wakayama: 4 days earlier than normal, 4 days earlier than last year Kimii-dera
Matsuyama: 4 days earlier than normal, 4 days earlier than last year Dogo Park

Cherry blossoms have been announced at 34 locations across the country by the 30th. In the end, cherry blossoms will be in full bloom in Tokyo, Wakayama, Matsuyama, Kochi, Fukuoka and Kumamoto by the 30th.




On the 31st, the last day of March, the area around Honshu will be covered by mobile high pressure, and will be sunny, mainly in western Japan, making it a perfect day to cherry blossom viewing. However, in western Japan, the cold is severe in the morning due to the effects of radiant cooling, and the temperature difference between the morning and afternoon is large, so be careful not to get sick. Also, be careful about managing your crops as frost may occur.
In Kanto and Tokai, clouds are high due to the influence of the humid air surrounding the high pressure system, and you will feel cold during the day. Even in places where there is no umbrella mark on the weather forecast, there are likely some places where rain showers will occur at night. When going out to see the cherry blossoms, be sure to keep warm and prepare an umbrella.

The new fiscal year will start with snow and cold rain, so when is the best time to enjoy cherry blossom viewing [Weekly Weather]

2025/03/30 12:50

There is only one day left in March, and the new year will soon begin.

However, there will be some areas that will start with cold rain and snow, and April will likely start with the weather that is sluggish.



Looking at the weekly forecast weather map,
From Tuesday, April 1st to Wednesday, April 2nd, high pressure will stagnate in the Sea of Okhotsk, and cold winds from the northeast will flow into the Pacific side of Eastern and Northern Japan.

In addition, the front will stagnate over the sea to the south, and as the low pressure system on the front develops along the southern coast of Honshu through the 3rd (Thursday), there will likely be many places where cold rain and snow will occur.


High pressures will be overhanging from the continent around the 4th (Friday), and there will be some sunny spots in western and eastern Japan, but in spring the weather will change quickly, and on Sunday, the next low pressure system will approach and the rain will likely become wide.



If you look at the forecast for the rain and snow from April 1st to April 2 as of today, Sunday the 30th,
While the rain and snow are not always falling, there are white predictions, mainly in the inland areas of Kanto, Koshin, and there are likely some areas where snow will occur.

There are many rainy areas along the coast of southern Kanto, but
The temperature is not rising and it looks like it will rain coldly.


There are probably some people who commute to work or school in a new suit or uniform in the new fiscal year, but
We need to take measures against rain, such as keeping your feet and clothes out of wet.



#The weekly forecast is for cherry blossom viewing around the 3rd to 4th in western Japan, and around the 4th to 5th in eastern Japan


The final weekly forecast.
This year, many cherry blossoms are already in bloom in western and eastern Japan, and
It is expected that many places will be in full bloom by the end of this week.

However, the weather will be unfortunate for the new fiscal year, and there is a small chance of cherry blossom viewing.


In particular, there will be sunny days in western Japan from Thursday the 3rd to Friday the 4th, and in eastern Japan from Friday the 4th to Saturday the 5th.

The temperatures will rise during the day, and
It looks like it will be a cheerful place to enjoy cherry blossom viewing.

However, it gets cold in the mornings and evenings, so please leave in full warmth and warm when you see the cherry blossoms at night.

Increased the eruption alert level at Mt. Kirishima (Shinmo-dake) to 3

2025/03/30 07:15

Today (30th), at 3:53am, the Japan Meteorological Agency announced that the level of eruption alert on Mt. Kirishima (Shinmo-dake) would be raised to 3/BR (mountain entry restrictions).

#Information type

#Eruption warning (around the crater)

#Eruption alert level/Booting from br2 (regulations around the crater) to 3 (entrance restrictions)

#Volcanic activity situation

#Volcanic activity
As volcanic earthquakes with epicenter just below the crater have been increasing since around the 28th, crustal movements indicating expansion of the mountain body have been seen from around 2:00 on the 30th.

#Target cities and villages
Miyazaki Prefecture Miyakonojo City, Kobayashi City, Ebino City, Kogen Town
Kagoshima Prefecture Kirishima City



#Disaster Prevention Warning
#Large volcanic rocks that scatter along the trajectory can reach approximately 4km from the Shinmoe-dake crater, and the pyroclastic flow can reach approximately 2km.
Therefore, be careful within a range of approximately 4km from the Shinmodake crater.

#Please be careful as not only volcanic ash but small volcanic volcanoes may be washed away by the wind all the way down.

#Please be careful as there is a risk that the window glass may break due to the large air swing caused by the explosion, as in 2011.

#Please do not enter dangerous areas according to the instructions of local governments or other means. "

#** (Reference: Explanation of the level of eruption alert) **
[Level 5 (evacuation)]: Evacuation from dangerous areas of residence.
[Level 4 (evacuation for elderly people, etc.)]: Evacuation of elderly people, etc. in residential areas where vigilance is required, preparations for evacuation of residents, etc.
[Level 3 (mountain enrollment restrictions)]: Restrictions for entering dangerous areas such as mountain climbing and mountain enrollment restrictions. Depending on the situation, consideration is required for elderly people, etc. Preparation for evacuation for persons, etc.
[Level 2 (regulations around the crater)]: Restrictions for entry to the area around the crater, etc.
[Level 1 (Note that it is an active volcano)]: Restrictions for entry to the crater, etc. depending on the situation.
(Note: The area subject to evacuation and regulations will vary depending on the local situation and volcanic activity situation)

*Source: Japan Meteorological Agency (https://www.jma.go.jp/jma/index.html)

A new change from summer days!! The cold weather in the middle of winter. There are still some areas when you get home. The new year begins with rain, and the winter cold weather is once again [Kanto Koshin Weather]

2025/03/29 13:14

Yesterday, the 28th (Friday) in central Tokyo, a maximum temperature was observed at 1:36pm, giving it a warm atmosphere similar to that of mid-June.
However, today, Saturday the 29th, marks a change from summer sun. It's cold in the middle of winter.

#Even as the rain weakens, the temperature does not rise, and even more temperatures drop
Today, Saturday the 29th, a northeastern wind and a west wind collide over the southern seas of Kanto, causing clouds to form, and rain clouds spread around the Kanto region.
There are some areas where cold rain and wet snow fall in the Kanto, Koshin and southern Tohoku.
In central Tokyo, the highest temperature was 14.3 C, as observed at 12:20am, and the temperature has since been falling.
The temperature as of noon is 6.1c, which is 18.4c lower than the temperature at noon yesterday, the 28th (Friday).



After this, the rain clouds will gradually pass through the sea, and in many places the rain will weaken.
However, in the Kanto, Koshin and southern Tohoku, the effects of rain and snow from the morning, cold winds in the northeast, and cold air above, so temperatures are expected to drop even further.
Also, there will be some areas covered in clouds throughout the night, with light rain remaining.

#Is it a good day to see the cherry blossom viewing tomorrow, the 30th (Sunday)
In Kanto, Koshin, there will be many places where the sun will return during the day, tomorrow, the 30th (Sunday).
There are a lot of clouds in the southern Kanto region, but sunlight is expected to reach through the gaps between the clouds.
The expected high daytime temperature in central Tokyo is 14c, just like mid-March, and although it is slightly lower than normal, you can feel the warmth of the sun compared to today, Saturday the 29th.



#New year starts: Rain is cold in the Kanto region
Rain clouds will spread around the Kanto region at the start of the new year, and there are expected to be some areas where rain will fall.
The expected high daytime temperature in central Tokyo is 10c, and the cold winter will return again.
As of Thursday the 3rd, the weather is likely to rain, and temperatures are expected to be lower than normal.
Please be careful not to get sick as the new fiscal year begins.