Weather today, Friday the 4th: Northern Japan's sky is unclear; Kanto has been in the first sunshine in a long time

2025/04/04 06:02

Today, the 4th, it is expected to be covered by high pressure from western Japan to eastern Japan. The weather in northern Japan is likely to be affected by cold weather and clouds are likely to spread.



There are many clouds throughout Hokkaido, and there will be some areas where rain and snow will fall, mainly in the morning. It's safe to have rain gear when going out.
There will be some areas where rain showers will occur mainly in the morning on the Sea of Japan side of Tohoku and Hokuriku. It seems that the weather will be better in the afternoon.
It is expected that the highest temperatures in northern Japan will often be below 10 C. Please stay warm when you go out.


The Kanto and west will be covered by high pressure. The sun will be exposed to the sun during the day, making it a comfortable experience. It looks like it will be a sunny day in Kanto for the first time in a while. In the afternoon, there may be showers in parts of the western Kanto region and Tokai, so it is a good idea to have a folding umbrella when you go out.
The temperature rises during the day and you can feel the warmth of the sun, but it gets cold in the mornings and evenings, so be careful of the temperature difference.

Summary of weather and temperature (March 23-March 29, 2025) Record warmth: Central Tokyo observes summer days in March

2025/04/04 00:17

A summary of the weather and temperatures from March 23rd to March 29th, 2025.

#Characteristics of atmospheric pressure arrangement
On the 23rd, a low pressure system flew eastward through the Sea of Okhotsk and the Kuril islands. A mobile high pressure system moves southeasterly from the northeastern part of China to the western Sea of Japan. High pressure slowly moves eastward over Japan's southern seas. The area around Honshu was placed in a pressure system with a high and low pressure system. On the 24th, a low pressure system accompanied by a front line flew east through the northeastern district of China. The atmospheric conditions have become unstable in the west and eastern Japan due to the influence of damp air and pressure valleys accompanied by chills above. On the 25th, a low pressure system that had developed in the Sea of Okhotsk moved northeast. The center of the high pressure system moves eastward along the waters near the Ogasawara Islands. On the 26th, a cyclone accompanied by a front developed, and the area passed through the Pacific side of the Tsugaru Strait and Hokkaido. High pressure is centered around the Sea of Japan and is moving southeast. On the 27th, a low pressure system accompanied by a front line flew northeasterly through the Sea of Japan. Another low pressure system moves southeasterly through northeastern China. On the 28th, a low pressure system accompanied by a front moved northeasterly through northern Japan. In the morning, a low pressure system with a front line appeared near the Tokai area, moving northeast. On the 29th, a low pressure system that passed through northern Japan changed generations over the Tokai region. Each of them went northeasterly and the front extended south to the southwest islands.

#Precture
On the 23rd, rain and snow fell on the centre of the mountains of northern Japan due to the effects of a low pressure system that traveled through the Sea of Okhotsk. On the 24th, the pressure valleys and humid air flowed over the sky, causing rain clouds to travel eastward through west and eastern Japan. The atmosphere became unstable and some areas ended up in thunderstorms. On the 25th, the atmosphere became unstable until the early hours of the morning, and rain clouds developed. Rain was raining in the Kanto and Tohoku regions, and it was a bit heavy in the Kanto region. There were no precipitation observations during the day. Yellow sand was observed in Tokyo and Osaka. On the 26th, snow and rain fell in northern Japan, mainly in the morning. There was snow mainly inland and northern Hokkaido, and many other areas were raining. On the 27th, warm and humid air flowed into the low pressure system that traveled through the Sea of Japan. In the morning, thunderstorms occurred mainly in southern Kyushu and Shikoku, and at 5:34am, violent rain was observed with an hourly precipitation of 118mm. On the 28th, the cold front passed. . In Shikoku, extremely heavy rain was observed in the early hours of the morning. Heavy rains in the Nansei Islands in the afternoon. On the 29th, the cold air flowed in. Snow fell along the mountains of western Japan, and snow fell in places in northern Japan.

#Temperature
On the 23rd, the pressure system was placed in a south high and north low near Honshu. The temperature was 25.6 C in central Tokyo, making it the first summer day of the year. On the 24th, the summer days were held in Hyuga City, Miyazaki Prefecture, 25.7c and 25.0c in Anabuki, Tokushima Prefecture. On the 25th, the sun was exposed to the west and eastern Japan, and the temperature rose. The early summer weather was welcoming everywhere. In Kyushu, the temperature is record-breaking, with temperatures exceeding 28 C, especially in western Japan. The temperature was observed in central Tokyo at 25.0 C. It's the second summer day this year. The highest temperatures have been set to 76 points, with a new highest temperature in March. On the 26th, 30.3 C was observed in Takanabe, Miyazaki Prefecture and Ume, Oita Prefecture, making it the first midsummer day in the country. This is the first time in history that this was the third summer day in central Tokyo, and three summer days in March. On the 27th, the temperature rose due to the warm air facing a low pressure system, and the effects of the Fohn phenomenon were added to Sanin, Kinki, Hokuriku, and other areas, making it a record-breaking heat for March. On the 28th, temperatures rose in Tokai and Kanto, when warm air flowed through. Meanwhile, cold air flowed on the Sea of Japan side of the East to Western Japan, causing temperatures to cooler than the previous day. On the 29th, cold air entered the country, and temperatures dropped significantly.



#Summary of weather for the current period (March 23rd to March 29th)
Average temperatures have risen nationwide as high pressures move eastward to the south of Japan and warm air flows from the south. The Sea of Japan side had a record-breaking temperature, with midsummer days recorded in March. In central Tokyo, the number of days observed during summer days in March was the highest ever recorded.
Precipitation was higher than normal in northern Japan due to the effects of low pressure and fronts. In addition, the number of cases exceeded normal, mainly on the Pacific side of western Japan, which was affected by moist air. On the other hand, there were fewer than normal in eastern Japan and southern Tohoku.
Sunshine hours were cloudy and were lower than normal in northern Japan, which was affected by low pressure and fronts. In Asahikawa and Abashiri, this is about half of the average year. On the other hand, in eastern and western Japan, the sun was mostly exposed, and there were more days than normal or more than normal.

The future is "high temperature trend" - the early summer's weather has passed since spring [Weekly Weather/Monthly forecast]

2025/04/03 15:44

Today, the 3rd (Thursday) will be sunny in western Japan and Tokai, and the spring sun is warm.


On the other hand, in the Kanto-north regions

Cold rain and snow fall, causing winter cold.

The highest temperature until 3pm today, Thursday the 3rd is
Sapporo: 5.7c
Sendai: 6.8c
Tokyo: 9.8c
Nagoya: 18.4c
Osaka: 16.8c
Fukuoka: 16.1c
Kagoshima: 18.7c
The feeling is very different between the west and east.



From tomorrow onwards, the spring-like weather will finally return to the north and the cold will be relieved.

Weather will change periodically, like spring, and the weather will likely change over time, with low pressure and fronts passing over the weekend and the second half of next week, with more rainy areas likely.



In Kyushu, Shikoku, Hiroshima and Tokyo, where cherry blossoms are already in full bloom
Rain over the weekend can be "flowering rain."

However, for cherry blossoms in the Hokuriku and Tohoku regions that have not yet bloomed
/Rain on weekends may be "stimulating flowers rain = rain that encourages flowering."

We expect there will be more days with hot weather up to next week, and
It is likely that there will be many places where the weather will be warmer in early summer.

With this warmth, cherry blossoms in Hokuriku and Tohoku are likely to bloom all at once.




[Temperature]
In the latest monthly forecast released today, Thursday the 3rd, the
Cheap temperatures are expected to be high in North and Eastern Japan, and as they are prone to being covered in warm air, temperatures are expected to be as high as normal or higher in Western Japan.

In particular, during the first half of the period, there are places where it is quite high in northern Japan, and once cherry blossoms in northern Japan bloom, they may reach full bloom earlier than usual.


It may be possible that the best time to see the flowers will be shorter, so it would be a good idea to plan your cherry blossom viewing early.



[Pressure]
Because there are times when it is less susceptible to low pressure, fronts, and humid air, precipitation in the Sea of Japan side of the Eastern Japan and in the western Japan will be as low as normal or less.

[Sunlight hours]
In northern Japan, there are times when it is susceptible to low pressure and humid air, so
Sunlight hours are expected to be low.
Also, it is expected to be as low as normal in Okinawa and Amami.



The start of the new fiscal year has been cold in winter, mainly in eastern and northern Japan, but
There are likely days that will suddenly become warmer in early summer, past spring.

The seasons are likely to move forward significantly in the future, so
It would be a good idea to seriously move forward with changing clothes to spring and summer.

The longest ever big meander to the Kuroshio Current: High sea surface temperatures continue off the coast of Sanriku [Marine Summary: March 23rd - 29th, 2025]

2025/04/03 13:05

The Kuroshio Current continues to be in a massive meander. The Kuroshio Great Tortoise, which began in August 2017, is now seven years and eight months, and is the longest recorded history, significantly exceeding the four years and eight months between 1975 and 1980.

We expect the Kuroshio giant meandering will still continue, but
The vortex may tear again and the meandering may shrink.
(From JAMSTEC Kuroshio Oyashio Watch)

This is a summary of the oceans from March 23rd to 29th, 2025.



#Pressure arrangement and waves
On the 23rd, a low pressure system developed and drove eastward around the Sea of Okhotsk.
The wave height exceeded 4m around Sakhalin, and it was overtaken.

On the 24th, the area around Japan was covered by high pressure, and the waves continued to move calmly.

On the 25th, a low pressure system moved northeasterly from the east of the Kanto region off the coast of Sanriku.
The waves rose in the Izu Islands and the east of the Kanto region.

On the 26th, a front extending from the low pressure system passed through Honshu.
Wave heights around 3m from the east to Sanriku of Kanto.

On the 27th, a low pressure system accompanied by a front advanced into the Sea of Japan.

On the 28th, a low pressure system with another front occurred on the southern coast of Honshu.
On the 28th, the wave height exceeded 4m in the East China Sea and the East of Kanto.

On the 29th, the front extending from the low pressure system stagnated south of Japan. The waves continued to be high in the East China Sea and the East of Kanto.



#Sea surface temperature
The sea surface temperature in the Sea of Japan was slightly higher than normal on the northern and central continental sides, and in the western part of
, it was as normal or slightly lower than normal.

In the waters near the East China Sea and the Southwestern Islands, the waters slightly lower than normal have been reduced, and the waters that are normally expanding.


The Pacific side continued to be lower than normal, mainly off Shiosaki Cape, where the Kuroshio Current is ripped.

The Kuroshio Current (current east of the Boso Peninsula) extends from the east of the Kanto region to the offshore Sanriku region.
The sea surface temperature off Sanriku, where the Kuroshio Current moves north, was much higher than normal, and
May be at most 3 C higher.


The temperatures were also up to 4 C higher than normal.
The area of the sea ice near the Sea of Okhotsk gradually reduced.

Weekly weather for the coming week: The warmth is spring-like, weather changes periodically

2025/04/03 08:05

The weather will change periodically from now on, and it looks like it will continue to have warm spring-like days.




Tomorrow, the area around Honshu is expected to be covered by a wide range of mobile high pressure systems. In northern Japan and Niigata, there are likely some areas where rain clouds remain, but the area around Honshu is expected to be sunny during the day.
In Hokkaido, snow and rain will likely occur mainly on the Sea of Okhotsk side, but the area of snow and rain is expected to gradually narrow down as early as the morning of the 5th (Saturday).

On Saturday, the 5th, a low pressure system will approach from the west, and the weather will likely fall in the Sea of Japan side and Shikoku in western Japan. Be careful of sudden rain, lightning, and gusts of wind that fall in a short time.
On Sunday the 6th, due to the effects of the low pressure system that travels through the Sea of Japan, there is likely to be a temporary weather change, mainly from northern Japan to eastern Japan. Please be careful of sudden rain or thunderstorms as the atmosphere will become unstable. Don't forget to wear rain gear when you go out.


From next week onwards, there will likely be many sunny spots all over the country. The highest temperature during the day exceeds 20 C, making it a perfect day to view the cherry blossoms. Cherry blossoms are likely to bloom and in full bloom in Hokuriku, Koshin, and southern Tohoku. However, around Thursday the 10th, a low pressure system accompanied by a front is expected to pass through the area around Honshu. The weather will once again be a big break.


There is no prediction that the cold will return from next week onwards, but pollen will be more likely to fly on sunny, temperatures rise and dry days. If you are sensitive, take sufficient measures and enjoy the spring.

Kanto region: The weather is raining and stopping, and be careful of thunderstorms in the evening

2025/04/03 06:54

A low pressure system accompanied by a front is moving north-northeast across Japan's East Sea. There are different lows off the coast of the Tokaido and the Sea of Japan, each moving towards the east. Additionally, due to the effects of the low pressure system in the Sea of Japan, cold air is flowing into the sky above the mainland near Honshu.


Today, the 3rd (Thursday), the Kanto region will be raining and halting due to the humid air from the low pressure system that travels off the coast of Tokaido. It looks like it will be a day that will never be able to take away your umbrella. Also, due to the cold air above, the temperature will not rise and there is little sunlight, so the highest temperature during the day will likely be around 10 C. There are many places that are colder than yesterday, so please go out wearing warm clothes.



From the afternoon to the evening, the air condition in the Kanto-Koshin region becomes unstable due to the effects of cold air above, and thunderstorms can occur, especially inland areas. Be careful of sudden rain, heavy gusts of wind such as lightning strikes, tornadoes, and hail falling in a short period of time. This may coincide with your return time today, so please be careful of changes in the sky and move around.




Tomorrow, the weather will be covered in high pressure areas around Honshu and the weather will recover. The highest temperature during the day will be above 15 C, and is expected to be over 5 C higher than today. The weather will temporarily deteriorate on Sunday the 6th, but as the warmth of spring returns, it will be a perfect day for cherry blossom viewing through next week.

Tomorrow Hokkaido is getting snowy, rainy again near Kanto Weather is downhill from the west on the weekend Next week will continue to warm spring

2025/04/02 13:01

Tomorrow, the 3rd (Thursday), there will be some places in Hokkaido where there will be a blizzard.
Beware of thunderstorms in Tohoku and Hokuriku. The weather around Kanto is prone to rain.
Weather is downhill from the west on the weekend.
The warmth of spring is likely to return from around Sunday the 6th.



Tomorrow, the 3rd (Thursday), a cyclone with fronts will develop, and the waters will progress to the east of Japan to the Kuril Islands, with Hokkaido wide snow falling.
On the Pacific side, the pressure slope is expected to increase between low pressure and front and high pressure.
There will be a strong wind with snow, and there will be some places that will turn into a barrage.
Although the low pressure system gradually moves eastward, the atmosphere is expected to become unstable due to the approach of the atmospheric valley with chills above.
In Tohoku and Hokuriku, rain will fall intermittently, and there will be some places that will cause lightning.
A new low-pressure will also emerge off the coast of Tokai, and is expected to move east into Japan.



In Kanto, Koshin, it is more likely to rain in the coastal areas during the day, and more places will fall from the evening.
There are some areas in Tokai that rain in the morning, but it is expected that the number of areas will stop during the day and the sun will reach more areas.
The Sea of Japan side of the Western Japan side is likely to change due to the effects of cold and humid air, and there will be rain showers.

The day after the 4th (Friday), the area around Honshu is expected to be covered in high pressure and many sunny spots.
There will be snow in northern Hokkaido, and showers will occur in parts of Hokuriku, Kanto, Koshin, and parts of Tokai.





#Weekend Weather descent from the west
Day downhill from the west
Day downhill from the west/BallDay downhill from the west/BallDay downhill from the west/BallDay downhill from the west/BallDay downhill from the west The high pressure system is expected to move from the area around Japan to the east, while the low pressure system is expected to move from the Yellow Sea to the Sea of Japan.
There are many sunny spots in northern Japan, and there are probably many clouds west of Kanto.
In the Kanto and Kinki, during the day, the sunlight reaches through the gaps between the clouds, so there is a chance to enjoy cherry blossom viewing.
From the evening onwards, the weather will go downhill from the west. There will be some areas where rain will fall, mainly in western Japan.
From Saturday, the 5th, temperatures will be as low as normal or as low as normal, with days expected to continue to be lower than normal, mainly in western Japan.

On Sunday the 6th, the low pressure system will move from the Sea of Japan to the east, and rain is expected to fall during the middle of Japan north of the East Sea.
Also, as high pressure systems move from the East China Sea to the vicinity of western Japan, the weather is recovering from the west in western Japan.
Temperatures will be higher than normal in the north of Kinki, and west of Chugoku will return to normal, giving you a sense of the warmth of spring.

#Next week The warmth of spring continues
From the 7th (Monday) to 9th (Wednesday), the low pressure system will continue eastward from the Sea of Japan to the Japanese island, reaching the east of the Kuril Islands.
High pressure is expected to move from near western Japan to east Japan.
There will be some areas in northern Japan that will rain and snow from the 7th (Monday) to the 8th (Tuesday).
Next week, temperatures will tend to be higher than normal, mainly in the north of Kinki.
Central Tokyo is also around 22 C, and it's probably going to reach 20 C for the first time in a while.

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











































































































































































































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[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.