A low-pressure system will develop tomorrow, possibly a blizzard on the Sea of ??Japan side of Tohoku Strong cold air will move south again in the second half of the week, leading to warning-level heavy snow [Weekly Weather Forecast]

2026/01/26 12:17

Weekly Weather Forecast
#First half of the week: Winter-type atmospheric pressure is relaxed, and a low pressure system develops
#Second half of the week: Strong cold air moves south again, fear of warning-level heavy snow on the Sea of Japan side
#Starts in February: Clouds are also high on the Pacific side, and rain begins to fall from the west
#Severe cold persists in places with temperatures lower than the coldest cold of the year



#First half of the week A winter-type low pressure system develops due to the loosening of the atmospheric pressure system
The strongest and longest cold air of the season, which caused damage to various places, has finally passed its peak.
Tomorrow, the 27th (Tuesday), the winter-like pressure pattern is expected to loosen and a low pressure system will approach.
A low-pressure system in the East China Sea is moving south of Japan, and there will be some rain in the Nansei Islands and southern Kyushu until the morning.
Also, a low-pressure system in the Sea of Japan will develop and pass over Tohoku, and another low-pressure system will slowly move south west of Hokkaido.
Atmospheric conditions are expected to be unstable in eastern and northern Japan on the Sea of Japan side due to the effects of warm, humid air heading toward a low-pressure area and cold air in the upper atmosphere.
In the plains between San'in and Hokuriku on the Sea of Japan side, there are many places where it rains instead of snow, so be careful about melting snow.
Be careful of avalanches in mountainous areas.
After the low pressure system passes, the cold air will move south, and more areas on the Japan Sea side will turn to snow at night.
Intense snowfall is expected in some places, accompanied by thunder.
There is a risk of a warning-level blizzard on the Sea of Japan side of Tohoku.



#Second half of the week Strong cold air moving south again There is a risk of warning-level heavy snow on the Sea of Japan side
The winter-like atmospheric pressure pattern will return to normal on the 28th (Wednesday), and the winter-like pressure pattern will become stronger from the 29th (Thursday) to the 30th (Friday).
Although not as cold as last week, there is a risk of heavy snow mainly on the Sea of Japan side as strong cold air moves south from the 29th (Thursday) to the 30th (Friday).
Depending on the strength of the cold air, there is a possibility of heavy snowfall in the Sanin and Hokuriku regions, so please keep an eye on the latest weather information.
On the Pacific side, there are few places where it will rain or snow, and the air is expected to remain dry.
Please be careful when handling fire.



#Starting in February The Pacific side is also cloudy and rain begins from the west
On the 31st (Saturday), the winter-type pressure system will loosen, and a low pressure system in the East China Sea will move south of Japan until February 1st (Sunday).
On the Pacific side, the weather is downhill from the west.
Clouds will gradually increase, and rain is expected to occur in the Nansei Islands and the Pacific side of western Japan on February 1st (Sunday).





#The coldest cold of the year continues even in places with temperatures lower than the coldest cold of the year
Tomorrow, the 27th (Tuesday), the winter-like atmospheric pressure will loosen and the cold will ease a little, but midwinter-like cold days will continue into the weekend.
Although it is originally the coldest period of the year, there will be days when the temperature is even lower than the average cold weather, so it is necessary to be fully protected from the cold.
Mornings are getting colder, so please be careful of frozen water pipes even in inland areas of Honshu.
It's exam season, so please don't get sick from the cold.

[Weather from the beginning of the week] The continuous heavy snow and cold waves have finally passed the mountain pass, and there are many days where it snows on the Sea of ??Japan side.

2026/01/25 18:52

There is a well-developed low pressure system far east of Japan, and it is moving away to the east.
On the other hand, the dominant high pressure system on the continent extends to the east, and strong cold air and winter-like pressure patterns continue near Japan.
Due to heavy snowfall every day, there are places on the Sea of Japan side where the snow depth is more than twice the normal level.



Currently, snow is falling on the Sea of Japan side, and there are places in Fukushima Prefecture where a storm warning has been issued.

Continuing, heavy snow is expected to occur in some places in northern Japan, mainly along the Japan Sea side, until the 26th (Monday) due to cold air in the upper atmosphere and a strong winter-like atmospheric pressure distribution.
Please be wary of traffic disruptions due to heavy snow and frozen roads.
Also, due to the heavy snowfall that started on the 21st, you need to be careful of avalanches in areas where there is a lot of snow.



In eastern and western Japan, the high pressure system will spread from the west, and the winter-like pressure pattern will gradually loosen.
The cold wave has finally crossed the mountain pass and retreated to the north.
Snow will gradually stop in many places along the Sea of Japan and Hokuriku regions.

There will be no major weather changes in various parts of the Pacific Ocean, and it is expected that many places will be sunny.
Please be aware that in areas where a large amount of snow has fallen so far, there is an increased risk of snow falling from roofs and avalanches.



A pressure trough will pass through Japan on the 27th (Tuesday).
For this reason, it will be snowing and raining again, so it would be a good idea to clear the snow as much as possible.





From the 28th (Wednesday), a winter-like atmospheric pressure pattern will return, and strong cold air will flow into
30th (Friday).
The cold northerly monsoon winds are increasing in strength, causing snow on the Sea of Japan coast from Hokkaido to Hokuriku and the Sanin area, and there is a risk of localized heavy snowfall.

From Saturday the 31st to Sunday the 1st, a trough of atmospheric pressure will pass near Japan.
Especially if a low pressure system develops along the southern coast of Honshu and moves eastward, snow may also fall on the Pacific side.
Please pay attention to future weather information.

Weekly weather: Winter-like pressure patterns that will continue to repeat in the future. Be careful of trends in the south coast low pressure system at the beginning of February

2026/01/25 08:13

The winter-like pressure pattern is expected to continue around Honshu. From around the 31st of the month to the 1st of the following month, the winter-like atmospheric pressure pattern is likely to ease, but please pay close attention to the trend of low pressure.



The peak of the heavy snow is likely to be today, the 25th (Sunday). Tomorrow, the 26th (Monday), high pressure will gradually become dominant, and the area where snow will fall will gradually become narrower. Although there are few places expected to see extremely heavy snow, there are likely to be places on the Sea of Japan side from Hokkaido to the Tohoku region where there will be intermittent snowstorms. Please continue to be aware of the impact of heavy snow on traffic and poor visibility due to blizzard.




On the 27th (Tuesday), the winter-like atmospheric pressure pattern will be temporarily relaxed. A low pressure system will move from the Sea of Japan, pass through Honshu, and exit into the eastern ocean. Snow and rain are expected mainly in areas along the Sea of Japan.
After that, the atmospheric pressure will become winter-like again towards the end of the month, around the 30th (Friday). In particular, around the 29th (Thursday), extremely cold air with temperatures below -36 C at an altitude of approximately 5,000 meters is expected to move south toward Honshu again. Even if the winter-like atmospheric pressure pattern eases and the peak of heavy snowfall has passed, there is a possibility that the snow will become heavier again on the Japan Sea side toward the end of the month, so we must not let our guard down. Please be sure to check the latest weather information frequently.

On the other hand, there are many sunny days on the Pacific side of western and eastern Japan. However, from around the 31st (Saturday), many places are likely to be affected by the low pressure system moving along the southern coast of Honshu. The weather will turn downward from the west, with some areas experiencing heavy rain and snow on the Pacific side.
The low-pressure system is expected to develop as it moves along the southern coast of Honshu, and will pass into the sea east of Japan around the 1st (Sunday). Depending on the path of the low-pressure system and the cold air in the sky, there is a possibility that it will snow even in the flatlands of southern Kanto. Please pay attention to future information.

``Weather information regarding significant heavy snowfall'' announced one after another: Strict vigilance against traffic disruptions due to heavy snowfall

2026/01/25 06:56

Today, the 25th (Sunday), a winter-like atmospheric pressure pattern continues around Honshu with very strong cold air in the sky. In the Sea of Japan, a band of developed snow clouds associated with the Japan Sea Polar Air Mass Convergence Zone (JPCZ) extends, and the developed snow clouds are flowing one after another from Hokuriku to the Sanin area.

In the early hours of today, in Ishikawa Prefecture, significant snowfall of 20 to 28 centimeters was observed in 6 hours in Futatsuya, Kahoku City, Hodatsushimizu Town, Kanazawa City, and other areas. After 5 a.m., around 25 centimeters of snow was observed in Mikawahama-cho, Hakusan City, Tatsuguchi-cho, Nomi City, and other areas over a six-hour period. Heavy snow fell over a wide area from the Kaga region to the southern part of the Noto region, and meteorological observatories issued one after another "weather information regarding significant heavy snowfall."
In addition, in Yoshikata, Tottori City, the meteorological observatory has announced ``weather information regarding significant heavy snowfall,'' as 30 centimeters of snow had been observed in six hours by 5 a.m. today.
These areas are already experiencing heavy snowfall that is likely to cause major traffic disruptions, and there is a high possibility that the snow will continue to get heavier.



On the Sea of Japan coast from Hokkaido to the San'in area, there are places where the snowfall is already more than twice the normal level, and snow will continue to fall intermittently through today, the 25th, and there will be places where snowfall will rapidly increase in a short period of time, even in flat areas.
Some of the developed snow clouds may also flow into the Pacific side of the Tokai region, causing snow to accumulate in the plains of the Tokai region and the Kii Peninsula, where there is usually little snow. Traffic may be significantly affected, so please be sure to check the latest traffic and road information.



Please continue to be cautious of traffic disruptions due to heavy snow in areas along the Japan Sea side of northern and western Japan. In particular, in the flatlands of the Kaga region of Ishikawa Prefecture, where ``weather information regarding significant heavy snowfall'' has been announced, there is a risk of snow accumulation that will make it difficult to remove snow. Please be on high alert for heavy snow until noon today, the 25th, and refrain from going out unless necessary.

Heavy snowfall every day, prolonged winter, reaching its second peak tomorrow!

2026/01/24 18:25

A strong winter-like atmospheric pressure pattern continues near Japan.
Due to heavy snowfall every day, there are places from Tohoku to the Sanin area where the snow depth is more than twice the normal level.
In addition, due to the influence of a pressure trough extending from the Sea of Japan to the Hokuriku region, snowfall is increasing in some places, mainly from Hokuriku to Koshin and Tokai, resulting in heavy snowfall.
Heavy snow warnings have been announced in Niigata, Nagano, Gifu, and Fukui prefectures.




The strong winter pressure pattern will continue until the 25th (Sunday), and a trough of pressure extending from the Sea of Japan is expected to move from the Hokuriku region to the Sea of Japan side of western Japan.
As a result, the influx of strong cold air will continue.
Heavy snow is expected to fall not only along the mountains and in the mountains, but also on the flatlands, mainly on the Sea of Japan side of northern and western Japan.
Even on the Pacific side, where there is usually little snow, there will be places where there will be heavy snow.
In addition, there are places where the atmospheric conditions are extremely unstable, mainly from eastern Japan to western Japan on the Sea of Japan side. src="https://www.sunny-spot.net/topics/20260124182344_5.jpg" alt="image" width="500" height="281" />


In particular, developed snow clouds will move into the Hokuriku, Tokai, and Tohoku regions, and there is a risk of heavy snowfall in a short period of time.
In the Tohoku region and eastern Japan, be wary of traffic disruptions due to heavy snow and frozen roads, and in the Hokkaido region and western Japan, please be careful.
Especially in the Hokuriku and Tokai regions, snow clouds that have developed due to the effect of a trough in atmospheric pressure may flow in, causing heavy snowfall in a short period of time.

From tomorrow, the 25th (Sunday), please be on alert for traffic disturbances due to heavy snow and frozen roads in eastern Japan, and be careful and vigilant in northern and western Japan.




###Snow forecast
Heavy snow is expected to fall in some places from northern to western Japan, mainly on the Sea of Japan side.

The 24-hour snowfall expected from 18:00 on the 24th to 18:00 on the 25th is expected to be high in some places:
Hokkaido region 50cm
Tohoku region 60cm
Kanto-Koshinchi 70 cm
Hokuriku region 80 cm
Tokai region 70 cm
Kinki region 60 cm

After that, please make a reservation from 18:00 on the 25th to 18:00 on the 26th. Expected 24-hour snowfall amounts are high in some places: Hokkaido region: 40 cm
Tohoku region: 50 cm
Kanto-Koshin region: 30 cm
Hokuriku region: 40 cm
br Kinki Region 15cm

###Disaster Prevention Matters
In eastern Japan, please be on alert for traffic disturbances due to heavy snow and frozen roads through the 25th, and in northern and western Japan, please be careful.
Also, be careful of snow accretion and avalanches on power lines and trees.
Be careful of strong gusts of wind, including lightning and tornadoes, especially from eastern Japan to western Japan on the Sea of Japan side.
If there are signs of a developing cumulonimbus cloud approaching, please take every precaution to ensure your safety, such as moving inside a building.
There is also a risk of hail, so please be careful about managing crops and agricultural facilities.

Strong cold air moving south into tomorrow, the 25th; people in Tohoku and eastern Japan should be on alert for traffic disruptions

2026/01/24 07:55

A strong winter-like atmospheric pressure pattern continues near Japan. Due to heavy snowfall from the 21st (Wednesday) from the Tohoku region to the San'in region, the snow depth in some places is more than twice the normal level.



The strong winter-like pressure pattern will continue into tomorrow, the 25th (Sunday), and strong cold air will flow in.
Also, a pressure trough extending from the Sea of Japan is expected to move from near Hokuriku to the Sea of Japan side of western Japan.

As a result, there will be heavy snowfall in some places, mainly from the Tohoku region to the Sea of Japan side of western Japan, not only along the mountains and in the mountains, but also on the flatlands.
It is expected that there will be heavy snowfall in some places even on the Pacific side, where there is usually little snow. Especially in the Hokuriku, Tokai, and Tohoku regions, there is a risk that developed snow clouds will move in, causing heavy snowfall in a short period of time and causing a sudden increase in snowfall.

In the Tohoku region and eastern Japan, please be on alert for traffic disruptions due to heavy snow and frozen roads through tomorrow, the 25th (Sunday), and in the Hokkaido region and western Japan, please be careful. Also, be careful of snow accretion on power lines and trees, and avalanches.
Be careful of strong gusts of wind, including lightning and tornadoes, especially from eastern Japan to western Japan on the Sea of Japan side. There is also a risk of hail, so care must be taken when managing crops and agricultural facilities.

[Snow Forecast]
Heavy snow is expected to fall in some places from northern to western Japan, mainly on the Sea of Japan side.
#Expected amount of snow (in places with a lot of it)
+Expected 24-hour snowfall amount by dawn on the 25th (Sunday)
Hokkaido region 40cm
Tohoku region 70cm
Kanto-Koshin region 60cm
Hokuriku region 80cm
Tokai region 80cm
Kinki region 50cm
Shikoku region 20cm
Northern Kyushu 20cm
24-hour snowfall forecast by dawn on the 26th (Monday) Hokkaido 50cm
Tohoku region 70cm
Kanto-Koshin region 50cm
Hokuriku region 50cm
Tokai region 30cm
Kinki region 50cm

Weather for today, the 24th (Saturday): Cold air is heading south again on the Sea of ??Japan side, heavy snow warning, sunny in many places on the Pacific side

2026/01/24 06:30

Today, the 24th (Saturday), a winter-like atmospheric pressure pattern is expected to gradually strengthen, and cold air is expected to move southward into the afternoon. We continue to need to be cautious of heavy snow, especially along the Sea of Japan side. It will be sunny in many places on the Pacific side.



On the Sea of Japan side, snow will fall widely from northern Japan to the San'in area. The snow and wind will be strong in the afternoon, and coastal areas will need to be on guard against blizzards and heavy snow. In particular, due to the JPCZ (Japan Sea Polar Air Mass Convergence Zone), snow clouds that have developed mainly in the Hokuriku region tend to flow in one after another, causing a sudden increase in snowfall not only along the mountains but also on the flatlands in a short period of time, potentially resulting in heavy snowfall. Please refrain from going out unless necessary, as transportation may be affected.

It will be sunny in many places on the Pacific side. Because the air is dry, care must be taken when handling fire. In addition, snow clouds are expected to flow into some parts of the Tokai region and western Japan as far as the Pacific Ocean. Please pay attention to changes in the sky.

The sunshine will reach Okinawa and the weather will be fine for going out.

The coldness of midwinter continues in many places. Please take thorough measures to protect yourself from the cold when going out.

Strong winter atmospheric pressure distribution, lower sea surface temperatures in the Sea of ??Japan, ocean summary (January 11-17, 2026)

2026/01/23 17:06

A strong winter-like atmospheric pressure pattern frequently occurred, and strong cold air flowed into the upper atmosphere.
Sea surface temperatures in the Sea of Japan are lower than they have been in the past, and
are staying at or slightly higher than normal.

Below is the ocean summary (January 11th to 17th, 2026).



#Pressure distribution and waves
On the 11th, a low pressure system developing near Hokkaido passed through, and a strong winter-type pressure distribution occurred at night.
Japanese waters experienced heavy waves with wave heights of around 6m, mainly in coastal areas.
On the 12th, we were covered by high pressure from the west, and the winter-like pressure pattern loosened.
The high waves in the Japanese waters gradually subsided, but in the morning waves off the coast of Sanriku were over 6 meters high.
On the 13th, a low pressure system accompanied by a front passed through northern Japan.
On the 14th, the winter-like atmospheric pressure pattern strengthens. The central to northern part of the Sea of Japan and the coast of Sanriku were widely used as barges.
On the 17th, a low pressure system moved eastward from the Sea of Japan and passed through the Tohoku region, but the
low pressure system was small in scale and had little impact on the waves.



#Sea surface temperature
Sea surface temperatures in the Japanese Sea area have shrunk in areas with significantly higher temperatures, and
have remained at or slightly above normal from the northern to western regions.
The East China Sea continues to be at normal levels.
Sea areas south of Japan continued to be at normal levels, and waters off the Tokai and Kanto coasts continued to be below normal levels.
Off the coast of Sanriku, the sea area continues to be higher than normal or considerably higher.
The maximum temperature was 4c higher than normal.
The waters off the southeastern coast of Hokkaido continue to be higher than normal or considerably higher.
The waters around the Chishima Islands and the Sea of Okhotsk continue to be at normal levels.

[Astronomical show] The moon approaches Saturn tonight!! The strongest and longest cold wave of the season is in the air. Even if you have a chance to observe the Pacific Ocean, be sure to take precautions against the cold.

2026/01/23 11:09

#Today, the 23rd (Friday) - Tomorrow, the 24th (Saturday) The moon approaches Saturn!!
Saturn shines as bright as 1st magnitude in the southwest to west sky in the evening.
Today, the 23rd (Friday), from evening to evening, a slightly slender Moon with an age of 5 will be visible approaching Saturn.
Please enjoy watching the performance with the naked eye or with binoculars.
Around 7:00 p.m., Saturn will be at a slightly lower altitude of about 30 degrees, so it's best to observe it as soon as the sky gets dark.
Also, if you use a telescope, you can also observe the thinness of Saturn's rings.



There are two times a year when Saturn's rings become horizontal in its orbit, and at that time they are hardly visible.
This "disappearing ring" phenomenon occurs regularly, most recently in 2009 and March 2025.
After that, it became slightly visible, but it became difficult to see again in November 2025.
As of January 2026, Saturn's rings appear thin.

Saturn itself can be seen with the naked eye, and it was at its best when it was high in the sky last fall, but as it approaches its conjunction (aligning in the same direction as the sun) on March 25, 2026, it will gradually appear lower even at the same time.
After mid-March 2026, it will get closer to the sun and become less visible, and it will become invisible when it reaches conjunction on March 25th.
It will be visible in the eastern sky at dawn from around late May.

#There are opportunities for observation on the Pacific side, so be sure to take precautions against the cold.



Over the weekend, the 25th (Sunday), a winter-like pressure pattern will strengthen near Japan, and the strongest and longest cold wave of the season will hit the sky.
Today, the 23rd (Friday), please refrain from unnecessary and non-urgent outings in areas with heavy snowfall, especially on the Sea of Japan coast.
There will be showers in Okinawa, and there will also be snow in southern Kyushu, Shikoku, southern Kinki, Tokai, northern Kanto-Koshin, and the Pacific side of northern Japan.
It will be clear and there will be a chance to observe the approach of the Moon and Saturn.
In the 24 solar terms, we recently experienced a cold weather on the 20th (Tuesday), which is the coldest time of the year, and the cold air is even stronger than the cold weather in normal years.
When observing, please be sure to take precautions against the cold.

[Heavy Snow Information] Strong winter-like atmospheric pressure continues until around the 25th. Be on high alert for prolonged heavy snow

2026/01/22 23:22

A strong winter-like atmospheric pressure pattern continues in the vicinity of Japan, and the daily maximum 24-hour snowfall from the 21st to the 22nd was 50 cm in northern and eastern Japan, and over 30 cm in the Kinki region, and heavy snow warnings have been announced in some places in the Hokuriku and Chubu regions. In addition, in Shinbo, Tsuruga City, Fukui Prefecture, a significant snowfall of 32 centimeters was observed in the six hours up to 21:00 on the 22nd, and ``weather information regarding significant heavy snowfall'' was announced at 21:23 on the 22nd.



The strong winter-like atmospheric pressure pattern will continue until the 25th, and strong cold air is expected to flow in. There is a risk of heavy snow not only along the mountains and mountainous areas, but also on the flatlands, mainly from northern Japan to the Sea of Japan side of western Japan. Especially in the Hokuriku region, snow clouds that developed over the 24th will move in, and there is a risk of heavy snowfall in a short period of time.



Please be careful of traffic obstructions due to heavy snow and frozen roads, snow accretion on power lines and trees, and avalanches. Please avoid unnecessary and non-urgent outings in areas with heavy snowfall.
Also, from the 24th to the 24th, please be careful of strong gusts such as lightning and tornadoes, especially from eastern Japan to western Japan on the Sea of Japan side.