[The strongest and longest cold wave this winter] Next week will bring ``very low temperatures'' nationwide and ``considerable heavy snow'' on the Sea of ??Japan side.

2026/01/15 12:28

There are many days this week with relatively high temperatures for this time of year, but the ``strongest cold air of the season'' will remain for a long time next week, and a cold wave is likely to arrive.



Looking at the weekly weather map from Saturday the 17th,
there will be many places with relatively calm weather until around the 18th (Sunday), covered by high pressure overhanging the continent.

On the 19th (Monday), temperatures are expected to remain high as warm air flows towards the low pressure system passing through northern Japan.

However, from the 20th (Tuesday) onward, the winter-like atmospheric pressure pattern will continue, and the strongest cold air of the season is expected to flow into the sky above
.




Looking at the low-level cold air forecast,
cold air with a temperature of -6 degrees Celsius or less at around 1500m above the ground, which is a guideline for bringing snow in flat areas, is expected to remain over Japan from around the 20th (Tuesday) to the 25th (Sunday).

The peak of particularly strong cold air is around the 21st (Wednesday) and 22nd (Thursday).

Extremely cold air with temperatures below minus 12 degrees Celsius at around 1500m above the ground, which is expected to bring heavy snow in flat areas, is expected to flow into western and eastern Japan.

The coldest cold air we've seen in a single winter is heading south,
and is expected to remain for an even longer period of time.



The recently announced "Early Weather Information for Low Temperatures" states that the weather will be blue throughout Japan from around January 20th, and
that it is expected to be "very low temperatures."

In some places in northern Japan and inland areas, the temperature can drop to below -4 degrees Celsius, and there is a possibility of water outages due to frozen water pipes.

Also, please be careful about managing your crops.



Furthermore, due to the long-term stay of the cold wave, the amount of snowfall is expected to increase significantly.

The amount of snowfall for 5 days will be around 140-250% of the normal level mainly in the areas on the Sea of Japan side,
It is likely that some places will experience heavy snowfall of once-in-a-decade level at this time of year.

Heavy snowfall also requires vigilance for a long period of time.

There is a risk of large-scale stranding due to heavy snow, so
Please be careful and be on guard against traffic disturbances.

In addition, snow may accumulate on power lines, causing power outages.
It would be a good idea to prepare for power outages and stock up on food.




Finally, the weekly weather.

From now on, Hokkaido is expected to experience "midwinter days" with temperatures below 0c every day, and the bitter cold will continue.

In Tokyo, the maximum temperature will be 8c from the 21st (Wednesday) to the 22nd (Thursday),
In Nagoya and Fukuoka, the maximum temperature will be 5c on the 22nd (Thursday),
It looks like it will be bitterly cold, below mid-winter, in various places.

The cold wind is also blowing strongly, making it feel even colder than the temperature.

Please be careful not to get sick due to the cold wave.

Temperatures are rising in various places; Fukuoka is as sunny as April; areas with heavy snowfall should be careful about melting snow

2026/01/15 07:27

Today, the 15th, warm air is expected to flow into the vicinity of Japan from the south as a low-pressure system moves through the Sea of Japan. Temperatures will rise in many places during the day, and in many places it will be higher than the day before, with many places in western Japan likely to exceed 15 degrees Celsius.

The predicted maximum temperature is -1c in Sapporo, 11c in Sendai, 12c in Tokyo, 10c in Nagoya, 14c in Kanazawa, 13c in Osaka, 16c in Kochi, and 18c in Fukuoka.
South of Tohoku, you will feel comfortable during the day.
Fukuoka is also expected to experience unseasonably warm weather, similar to early April.



There is a risk that the snow will continue to melt in areas with heavy snowfall, and as of 7:00 a.m., an avalanche warning has been issued from Hokkaido to the San'in area. Be careful of snow falling from roofs, deteriorating road conditions, avalanches, etc.

Hokkaido is expected to be in the middle of winter in many places as the effects of cold air remain. Please continue to take precautions against the cold when going out.

Today's weather on the 15th (Thursday): Snow and rain are likely to fall north of Hokuriku, and sunshine reaches the Pacific side.

2026/01/15 06:42

Today, the 15th (Thursday), a low pressure system accompanied by a front will move through the Sea of Japan and pass near northern Japan in the evening. The weather on the Japan Sea side north of Hokuriku is likely to continue to be cloudy.



It will be a day of heavy snow and rain on the Sea of Japan side of northern Japan and Hokuriku. On the Sea of Japan side of Hokkaido, attention should be paid to increased snowfall, especially along the mountains.
In the afternoon, snow will turn to rain in some places in Tohoku and Hokuriku. Temperatures will rise from the previous day, and there is a risk that the snow will melt further. Please be careful of snow falling from the roof and avalanches.

On the Sea of Japan side of western Japan, there are places where the sun will reach in the morning, but from the afternoon onwards, there will be places where it will start to rain and cause thunderstorms. Please be careful of lightning, gusts of wind, and sudden heavy rain. It's a good idea to bring rain gear when you go out.

It will be sunny in many places on the Pacific side west of the Kanto region.
Western Japan is prone to clouds and showers, so it's a good idea to carry a foldable umbrella. The temperature will be high and the weather will be pleasant and sunny during the day.
Please be careful when handling fire as the air continues to dry.

Unseasonal "yellow sand" flying. Be careful after tomorrow's rain! [Yellow sand forecast]

2026/01/14 13:32

Today, the 14th (Wednesday), a winter-like atmospheric pressure pattern continues in northern Japan.

Although snow and rain continues on the Sea of Japan side of northern Japan and Hokuriku,
western Japan, eastern Japan and the Pacific side of northern Japan are covered by high pressure and are sunny in many places.



A low pressure system accompanied by a
front is expected to advance into the Sea of Japan and pass over the Japanese archipelago through the night.

In the afternoon, rain and snow will begin to fall from areas on the Sea of Japan side, and
winds will become stronger.



There is yellow sand waiting behind this low pressure system,
Looking at the forecast for yellow dust at 9 am on the 16th (Friday) the next day,
it is expected to fly widely from Kyushu to the southern part of Tohoku.

It is expected that it will continue flying from western to eastern Japan until around the 17th (Saturday).

It may be tempting to wash your clothes or car after the rain, but please be careful as yellow sand may stick to your laundry or car.

If you have a respiratory illness, please take precautions such as wearing a mask.

[Typhoon No. 1 to occur] Typhoon No. 1 occurred in January for the first time in 7 years since 2019

2026/01/14 11:03

A tropical cyclone east of Mindanao Island in the Philippines is expected to develop into a typhoon by tomorrow morning.

If a typhoon were to occur, it would be the first typhoon of the year and would be called ``Typhoon No. 1.''

In addition, this is the first time in seven years since 2019 that a typhoon has occurred in January.

Typhoon No. 1 of last year (2025) occurred on June 11th.
This year, the outbreak is expected to occur about 5 months earlier than last year.



The tropical cyclone east of Mindanao Island is expected to continue to develop and move slowly north-northwest,
to become Typhoon No. 1 by tomorrow morning.

After that, it is not expected to develop into a very strong force, but
it will approach the Philippines as a typhoon.

There is not expected to be any direct impact on Japan.

A complete change from the winter storm; sunny weather similar to March; caution against melting snow; warning of strong winds, blizzard and high waves until tomorrow; winter-like atmospheric pressure pattern after passing of low pressure system

2026/01/13 12:20

During the three-day holiday period, the winter shogun invaded and brought winter storms to various places.
Today, the 13th (Tuesday) after the 3-day holiday, a low-pressure system in the Sea of Japan will rapidly develop, passing near Hokkaido and heading into the Sea of Okhotsk, and a cold front will pass from western Japan to northern Japan.
As a result, there are expected to be heavy storms and heavy storms in places along the Japan Sea side of eastern and northern Japan until tomorrow the 14th (Wednesday).



Also, in eastern and northern Japan today, the 13th (Tuesday), atmospheric conditions will be extremely unstable in some places due to the influence of warm and humid air heading towards the low pressure front.
Temperatures will be similar to March in some places, and even on the Sea of Japan side of Hokuriku and southern Tohoku, many coastal areas are expected to experience rain instead of snow.
As the snow continues to melt, please be careful of deteriorating road conditions, falling snow from roofs, and avalanches in mountain areas.

After the low pressure system passes, we will once again have a winter-like pressure pattern.
The cold air in the upper atmosphere is expected to move southward to western Japan once again.
The snow will intensify, especially in northern Japan, causing blizzards in some places.
Please be careful where you step, as new snow may accumulate on top of melted snow, worsening road conditions.



In eastern and northern Japan, extremely strong winds are expected to blow, leading to strong winds and heavy snow in some places tomorrow, Wednesday the 14th.
The maximum instantaneous wind speed expected through tomorrow the 14th (Wednesday) is 35 m/s in Hokuriku and 30 m/s in the Tohoku region.
On the Sea of Japan side of eastern and northern Japan, there will be heavy rain in some places until tomorrow the 14th (Wednesday).
The expected wave height through tomorrow the 14th (Wednesday) is 6m in Hokuriku and Tohoku.



On the Sea of Japan side of eastern and northern Japan, please be careful of strong winds, heavy snow, and high waves until tomorrow the 14th (Wednesday).
Also, in eastern and northern Japan, please be careful of strong gusts of wind such as lightning and tornadoes today, the 13th (Tuesday).

Rapidly developing low pressure system - Beware of strong winds, heavy snowfall, and high waves from the Sea of Japan side of northern Japan to the Hokuriku region

2026/01/13 07:38

Today, the 13th (Tuesday), a low pressure system accompanied by a front is moving through the Sea of Japan, and is expected to develop rapidly in the future.
On the Sea of Japan side, this low pressure system will cause very strong winds, and it is expected that there will be strong winds at sea. Additionally, a cold front extending from the center of the cyclone will pass from western Japan to northern Japan, making atmospheric conditions extremely unstable in some places.



As cold air moves northward and warm air from the south tends to enter, many places in Hokuriku and Tohoku will experience rain instead of snow during the day. In inland areas and along the mountains of northern Japan, there are likely to be places with wet snow. As snow melts rapidly in areas with heavy snowfall, please be careful of avalanches and falling snow from roofs.



Also, extremely strong winds will blow from the Sea of Japan side of northern Japan to Hokuriku, and the weather is likely to be rough. At sea, there are swells and there is a risk of becoming a big rock.




Tonight, the area around Honshu will have a winter-like atmospheric pressure pattern, and cold air in the upper atmosphere will move southward. From tonight to tomorrow, rain will change to snow in many places from the Sea of Japan side of northern Japan to Hokuriku. In northern Japan, it is likely that there will be a blizzard in some places due to the effects of a rapidly developing low pressure system. From the Sea of Japan side of northern Japan to the Hokuriku region, please be on guard for strong winds and heavy snowfall through the 14th, as well as high waves accompanied by swells at sea.

Tomorrow, the 13th (Tuesday), there will be a lot of rain on the Sea of Japan side. The snow will melt due to unseasonably warm weather.

2026/01/12 20:54

As of 7 p.m. today, Monday the 12th, snow is falling in some parts of Honshu on the Sea of Japan side from northern Japan to Hokuriku.



It snowed this morning on the flatlands of the Tokai region, with 1cm of snowfall observed in Nagoya City and 11cm in Gifu City, the first snowfall of the season.
Although the peak of snowfall has already passed, there are many places around Tohoku, Kanto-Koshin, and Hokuriku, mainly along the mountains, with more than 100 centimeters of snow.



The winter-like pressure pattern near Honshu is gradually loosening, and a low pressure system is expected to pass through the Sea of Japan tomorrow. Warm air from the south toward the center of the low pressure system tends to enter, and temperatures in many places will be similar to those from February to March. The predicted maximum temperature for tomorrow, the 13th (Monday) is expected to be 2c in Sapporo (similar to late February) and 6c in Akita (similar to early March), so the severe cold is expected to ease. On the Pacific side, temperatures in some places are expected to be around the time cherry blossoms bloom, with temperatures expected to reach 15 degrees Celsius in Tokyo (like late March) and 14 degrees Celsius in Osaka (like mid-March), making it unseasonably warm.



However, in places where snowfall increased during the three-day holiday period, it is likely that snow will melt further due to rain. The Sea of Japan coast from southern Tohoku to Hokuriku and northern Kyushu is expected to experience rain instead of snow in many places, with localized thunderstorms.
There may be places in Hokkaido and northern Tohoku that will experience wet snow. In northern Japan, winds are expected to become stronger due to the developing low pressure system, and blowing snow is expected to occur in some places.

On tomorrow, the 13th (Tuesday), which marks the end of the three-day weekend, please be careful of deteriorating road conditions due to melting snow, snow falling from roofs, and avalanches.
Aircraft will be dry on the sunny Pacific side, so please be careful when handling fire.

Although the Sea of ??Japan side has passed its peak, we continue to be on alert for blizzards, etc.

2026/01/12 06:55

The area around Japan has a strong winter-like atmospheric pressure pattern, but it is gradually loosening from the west.
In northern and eastern Japan, very strong winds are blowing, accompanied by snow, and there are places where the sea is swamped.
Also, there are places on the Sea of Japan side of northern and eastern Japan where heavy snow is falling.

As of 6:00, heavy snow warnings have been announced in Tochigi, Gunma, Gifu, and Aichi prefectures, and blizzard warnings have been announced in Niigata prefecture and the Soya, Rumoi, and Ishikari regions of Hokkaido.

Although the peak of wind and snow is passing, it is expected that extremely strong winds will continue to blow in northern and eastern Japan today, the 12th, causing heavy snowfall in some places.

In northern and eastern Japan, please be careful of strong winds, heavy snowfall, and high waves today, the 12th. Also, please be on guard for traffic disruptions due to heavy snow today and into the morning of the 12th.
Also, be careful of lightning, gusts of wind, and hail.




[Wind Forecast]
Today, the 12th, in northern and eastern Japan, very strong winds will blow, accompanied by snow, and there will be places where it will be blustery or violent.

#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected for today 12th
Hokkaido region 23m/s (35m/s)
Tohoku region 18m /s (30m/s)
Hokuriku region 20m/s (30m/s)

[Wave forecast]
+In northern and eastern Japan, there will be places where there will be heavy waves today, the 12th.

#Expected wave height
+Expected wave height for today 12th
Hokkaido region 6m
Tohoku region 6m
Izu Islands 6m
Hokuriku region 7m With swell

[Snow forecast]
There will be heavy snow in some places in northern and eastern Japan today into the morning of the 12th.

#Expected amount of snow (in places with a lot of it)
+Expected 24-hour snowfall amount by dawn on the 13th tomorrow
Hokkaido region 30cm
Tohoku region 40cm
Kanto-Koshin region 15cm
Hokuriku region 30cm
Tokai region 10cm
Kinki region 15cm

Weather for today, the 12th (Monday): Stormy weather continues to be advised on the Sea of ??Japan side; weather is improving from the west

2026/01/12 06:28

Today, the 12th (Monday), the last day of the three-day holiday, the winter-like atmospheric pressure pattern will continue, mainly in northern Japan. People on the Japan Sea side north of Hokuriku should continue to be careful of the increasing snow and wind. On the other hand, there are many places on the Pacific side where it will be sunny, and from the west, the weather on the Sea of Japan side seems to be heading toward recovery.



Snow and rain will fall intermittently from the Sea of Japan side of northern Japan to Hokuriku. The snow will become heavier in the morning, and snowfall will increase in some areas along the mountains and inland, so caution is required. In addition, strong winds will continue, especially in coastal areas, and there will be some places where snowstorms will occur. Please be careful when driving as visibility may deteriorate.
There are many places on the Pacific side of northern Japan that receive sunlight. There is a possibility of snow showers mainly in the morning, so please be careful of changes in the sky.

There will be snow and rain in the northern Kinki and Sanin areas until the morning. The weather will start to improve in the afternoon, and it looks like it will stop in many places.

It will be sunny in many places on the Pacific side of eastern and western Japan. The wind is expected to be calmer than the day before, but the northerly wind is likely to feel cold in areas such as the Kanto region.

The temperature will not rise and it will be cold like midwinter throughout the day. The wind will continue to be strong, so please take precautions against the cold.