Beware of heavy snow in the Tohoku region until noon tomorrow; Beware of traffic disturbances in the northern Kanto region

2025/12/04 06:47

There is a low pressure system east of Japan, moving northeast. The low pressure system is rapidly developing and is expected to move toward the Kamchatka Peninsula by the evening of today, the 4th (Thursday), and a winter-like pressure pattern is expected to strengthen near Japan. The winter-like atmospheric pressure pattern will continue into tomorrow, the 5th (Friday). In addition, strong cold air for this time of year is flowing into the Tohoku region at around 5,000 meters above the ground, below -36 degrees Celsius, and into the Kanto-Koshin region below -30 degrees Celsius.

As of 6:30 a.m., a blizzard warning has been issued for the coastal areas of Akita and Yamagata prefectures, and a heavy snow warning has been issued for Gunma and Nagano prefectures.

On the Sea of Japan side of Tohoku, the wind from the west is very strong and is accompanied by snow, which will cause heavy turbulence on the sea. In addition, heavy snow is expected in some places in the Tohoku region.
Also, strong cold air is flowing into the sky, making the atmosphere extremely unstable, and cumulonimbus clouds are expected to develop in some places, causing thunderstorms.
There will be heavy snow in some places in Nagano Prefecture and the northern Kanto region until noon today, the 4th (Thursday).



#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected today, the 4th (Thursday)
Tohoku Sea of Japan side Sea Top 20m/s (30m/s)
Tohoku Sea of Japan side Land 18m/s (30m/s)
Tohoku Pacific side Sea 18m/ s (30m/s)
Tohoku Pacific side land 13m/s (25m/s)

#Expected wave height
+Today 4th Expected wave height
on (Thursday) Tohoku Sea of Japan side 6m
Tohoku Pacific side 4m

#Expected amount of snow (in places with a lot of it)
+Snowfall forecast for 24 hours by 6:00 tomorrow, the 5th (Friday)
Tohoku Sea of Japan side, along mountains 70cm
Tohoku Sea of Japan side, flat land 40cm
Tohoku Pacific side, mountainside 70cm
Tohoku Pacific side flat land 30cm
Northern Kanto region 20cm
Koshin Region 30cm


#Disaster Prevention Matters
On the Sea of Japan side of Tohoku, please be on guard for damage to traffic and buildings due to stormy winds from the west accompanied by snow into the morning of today, Thursday, April 4th.On the Sea of Japan side of Tohoku, please be on guard against damage to ships and coastal facilities due to high waves. In addition, in the Tohoku region, please be careful of traffic disruptions due to heavy snow, snow falling from roofs, damage to buildings and agricultural facilities, etc., and be careful of snow accretion on power lines and trees and avalanches until noon on Friday the 5th tomorrow.
Please be careful of tornadoes, strong gusts of wind, lightning, and hail, mainly on the Sea of Japan side of Tohoku, until noon tomorrow, Friday the 5th.

In Nagano Prefecture and the northern Kanto region, please be on guard for traffic disruptions due to snowfall and frozen roads until noon today, the 4th (Thursday). Also, be careful of snow accretion and avalanches on power lines, trees, etc.

Today's weather on the 4th (Thursday): Beware of heavy snow on the Sea of ??Japan side; sunny in many places on the Pacific side

2025/12/04 06:15

Today, the 4th (Thursday), there will be a strong winter-like atmospheric pressure pattern near Japan. It is necessary to be wary of heavy snow especially in northern Japan and Hokuriku. On the other hand, many places on the Pacific side will be sunny and the air will be dry.



There will be snow and rain across a wide area along the Sea of Japan, including Hokkaido, Tohoku, and Hokuriku. Heavy snowfall is expected, especially along the mountains, and snowfall is likely to increase rapidly. There are many places where even flat areas are covered with snow, so please be careful of deteriorating road conditions. There will also be strong winds, and there may be some places where it snows, such as along the coast. You also need to be careful about poor visibility due to snowstorms.

The weather in the Sanin area is likely to rain or snow until around noon.

It will be sunny in many places on the Pacific side. The wind is strong and the air is dry, so please be careful when handling fire.

Due to the effects of cold air, the temperature throughout the country will not rise, and it will be cold in the middle of winter. Please be sure to protect yourself from the cold.

[Kanto-Koshin heavy snow] General Winter will attack tonight!! Warning-level heavy snow is feared in Nagano Prefecture and northern Kanto, affecting transportation

2025/12/03 16:19

Due to the strengthening of winter-like atmospheric pressure patterns, heavy snowfall is expected in some places in Nagano Prefecture and northern Kanto from the night of today, the 3rd (Wednesday) to the early afternoon of tomorrow, the 4th (Thursday).

A winter-like atmospheric pressure pattern is expected to strengthen near Japan from Wednesday night today, the 3rd, to Thursday, the 4th, and strong cold air for this time of year, with temperatures below -30 C, is expected to flow approximately 5,500 meters above Kanto-Koshin.
As a result, there will be heavy snowfall in some places in Nagano Prefecture and northern Kanto from the night of today, the 3rd (Wednesday) until noon on the 4th (Thursday) tomorrow.



#Nagano Prefecture
Intermittent heavy snow is expected to fall mainly along the mountains in the north and in the Nakano-Iiyama area.
Please be on guard for traffic disruptions due to heavy snow and frozen roads from early morning until noon tomorrow, Thursday the 4th.
[Snow forecast]
Forecasted snowfall amount for 24 hours until noon on Thursday the 4th (in areas with the most)
Nakano Iiyama area 40cm
Along the mountains in the Nagano region, along the mountains in the Great Kita region 30cm
The plains in the Great Kita region, around Sugadaira in the Ueda region 15cm
The plains in the Norikura Kamikochi region, Kiso region, Nagano region 10cm

Until noon on the 5th (Friday) the day after Forecast 24-hour snowfall (in areas with the most)
Along the mountains in the Great North area 20cm
Along the mountains in the Nagano area Nakano-Iiyama area 15cm
(Indicate areas where 10cm or more is expected)



#Gunma Prefecture
There will be heavy snow in some places in the northern mountains from today's 3rd (Wednesday) night to tomorrow 4th (Thursday).
It is expected that there will be snowfall in some places even on the flatlands in the southern part of the country.
From early morning until noon on the 4th (Thursday) tomorrow, please be careful of traffic disruptions caused by heavy snow, and be careful of frozen roads, snow accretion on power lines and trees, and avalanches.
[Snow forecast]
Forecasted snowfall amount for 24 hours until the morning of tomorrow 4th (Thursday) (in areas with the most)
Mountains in the Tone/Numata region 40cm
Mountains in the Azuma region 20cm
Plains in the north, mountains in the south 4cm
Southern plains 1cm

Northern plains, southern mountains 1cm
(Mountainous areas are areas with an altitude of 500m or higher)

#Yamanashi Prefecture
In the central and western regions, there will be snow and rain in some places from late at night today, the 3rd (Wednesday) to early morning on the 4th (Thursday), and there will be snowfall in the mountains in the central and northern regions and in the Kyonan region.
Please be aware of traffic obstructions and icy roads due to snowfall.
[Snow Forecast]
Forecasted snowfall amount for the next 24 hours until noon on the 4th (Thursday) (in areas with the most)
Central north region mountains 2cm
Kyonan region 1cm

If the cold air above becomes stronger than expected or if snow clouds develop more than expected, there is a possibility of warning-level heavy snowfall.

[Frigid Archipelago] The most intense cold of the season, heavy snowfall and strong winds. Tomorrow, the temperature will be below freezing even during the day, even in the middle of winter.

2025/12/03 12:10

The strongest cold air of the season is expected to invade the skies over the Japanese archipelago tonight through Thursday the 4th tomorrow.



Cold air forecast for tomorrow morning.

A strong winter-like atmospheric pressure pattern will develop around Japan by tomorrow, and
the region around Honshu is expected to be completely covered in dark light blue areas and cold air (less than -6 degrees Celsius at around 1500m above sea level) that will bring snow to the plains.

Furthermore, cold air (less than -12 degrees Celsius at around 1500m above the ground) will move southward, bringing heavy snow even on flatlands, to the southern part of Tohoku.

At this time in a normal year, the temperature above Akita Prefecture is about -5c,
even in late January, in the middle of winter, it is about -10c, so it can be said that
it is a strong cold that is below the level of ``midwinter''.



#Snow in Nagoya and Kyoto There is also a risk of snow accumulation in flat areas

Looking at the snow, rain, and wind forecast for tomorrow morning,
strong winds will blow generally from the northwest,
and snow is expected to fall widely, mainly from the San'in area to the north on the Japan Sea side.

There will be heavy snow in northern Japan, Hokuriku, and the Sanin area, and
there will be blizzards accompanied by strong winds.

Next-westerly winds may bring snow clouds to some parts of the Pacific Ocean,
Nagoya, Kyoto, and other areas are also expected to experience snow, and there will be snowfall not only in the mountains, but also
on the flatlands.

The snow may also affect transportation such as expressways and Shinkansen trains.

Check the latest weather and traffic information, and be sure to use winter tires when driving over mountain passes.



There is a risk of warning-level heavy snow, especially along the mountains of Tohoku, Kanto-Koshin, and in the Sanin area.
The expected 24-hour snowfall is expected to be heavy in some places

until 6 a.m. on Thursday the 4th.
Tohoku Sea of Japan side, along the mountains 70 cm
Tohoku Sea of Japan side, flat land 30 cm
Tohoku Pacific side, along the mountains 70 cm
Tohoku Pacific side, flat land 30 cm
Northern Kanto region Area 40 cm
Koshin region 40 cm

Tomorrow 4th (Thursday) 6:00 a.m. to 5th (Friday) 6:00 a.m.
Tohoku Sea of Japan side along mountains 70 cm
Tohoku Sea of Japan side flat land The forecast is 30 cm
, Tohoku Pacific side, along the mountains, 50 cm
, Tohoku Pacific side, flat land, 20 cm
, northern Kanto region, 20 cm
, Koshin region, 20 cm
.



In addition, strong winds will blow from the west, mainly in the Tohoku region, and there is a risk of heavy snow falling with the strong winds.

The maximum wind speed (maximum instantaneous wind speed) expected from today, the 3rd (Wednesday) to the 4th (Thursday), is
Tohoku Sea of Japan side, sea, 20 meters (30 meters)
Tohoku Japan Sea side, on land 15 meters (30 meters)
Tohoku Pacific side, ocean 20 meters (30 meters)
Tohoku Pacific side, land 15 meters (30 meters)

.

Be careful of poor visibility when driving.
When driving during a snowstorm, be sure to turn on your lights even during the day.



Tomorrow will be a mid-winter cold,
It looks like it will be quite cold in the morning.

The expected minimum temperature for tomorrow morning is 4c in Tokyo and Osaka, 2c in Nagoya, 1c in Sendai
-4c in Aomori, and -5c in Sapporo.

In northern Japan, there are places in the middle of winter when the temperature does not reach 0c even during the day, so
Please be careful not to get sick from the sudden severe cold.

General Winter will attack from tomorrow. [Ministry of Land, Infrastructure, Transport and Tourism] also calls for heavy snowfall

2025/12/02 15:31

From tomorrow, December 3rd (Wednesday) to December 4th (Thursday), a winter-like atmospheric pressure pattern will be strengthened near
Japan, and extremely cold air, colder than midwinter, is expected to flow into the sky above
.



Looking at the forecast for cold air at midnight on the 4th (Thursday),
cold air that will bring snow on the plains (-6 degrees Celsius or lower at around 1500 meters above the ground) is expected to flow from southern Kyushu to Kinki, Tokai, and northern Kanto.

Even stronger cold air, below -12c, will flow into Akita.

The average cold in early December is around -5.0c,
even in the middle of winter it is around -10c, so we are expecting a strong cold (winter shogun) colder than
midwinter.

Yesterday, December 1st (Monday) and today, December 2nd (Tuesday), it was warm and

As many places experienced early spring weather,
the coldness of mid-winter will arrive all at once, and the temperature difference will be severe.



Furthermore, snow will fall mainly on the Sea of Japan side of northern and western Japan,
in addition to heavy snowfall in the mountains, there is also the possibility of snow accumulation on flatlands.

It looks like there will be many places in western Japan and the Tokai region where the first snow will be observed.

In addition, extremely strong winds will blow from the Tohoku region to the Hokuriku region,
causing a blizzard and there is a risk of sea barges.


The Ministry of Land, Infrastructure, Transport and Tourism has issued an announcement to be on guard against heavy snow and blizzards starting tomorrow.



+If it is unavoidable for drivers to drive, please make sure to install
winter tires, check in advance how to install chains, carry them with you,
as early as possible, and carry winter equipment such as shovels and sand.

In addition, due to snowfall conditions, large areas of expressways and national highways parallel to them may be closed at the same time.
We ask for your cooperation in implementing wide-area detours and reviewing traffic routes.


+During heavy snowfall in the past, the main cause was large vehicles getting stuck,
causing a huge impact.
Transport operators are required to take the necessary measures to ensure
safety, such as
ensuring that commercial vehicles are equipped with winter tires, when there is a risk of hindering transportation safety, such as during heavy snowfall.

In addition, in the event of a malicious stranding on a snowy road, such as neglecting to take necessary measures,
will be subject to administrative sanctions after confirming the facts through an audit and if it is determined that the measures taken are insufficient.
Please perform appropriate operation management.
On the other hand, shippers are also asked to refrain from making urgent transportation requests to trucking companies.

+In areas where heavy snow is expected, there is a risk of large-scale and long-term delays or suspensions of public transportation.

+Please pay attention to the latest weather and traffic information, and in areas where heavy snow is expected,
please refrain from going out for non-essential reasons, including using telework.
If you need to go out, please allow sufficient time.

[Ocean Summary] Storm warning issued in northern Japan due to high pressure in the west and low pressure in the east. Waves are widely rising and wave height exceeds 5m in some places (November 23rd to November 29th)

2025/12/02 12:42

Near Japan, the atmospheric pressure was often high in the west and low in the east, and the gradient of the atmospheric pressure became large.
Winds were increasing widely and strong wind warnings were issued in some parts of northern Japan, where the area is close to low pressure.
The waves were so high that in some places it became a barge.
Below is a summary of the ocean (November 23rd to November 29th)



#Pressure distribution and waves
From the 26th to the 29th, the Nansei Islands became the southern edge of the continental high-pressure system, and a state of large pressure gradient continued.
In the waters near the Nansei Islands, high waves continued, mainly south of Okinawa.
On the 26th, the pressure around Honshu was high in the west and low in the east, and between the low pressure east of Japan and the high pressure in the East China Sea, the pressure gradient became large and waves became high over a wide area.
On the 27th, the gradient in atmospheric pressure increased between a low pressure system far east of Japan and a high pressure system east of Japan, and waves became high in the east of Japan.
On the 28th and 29th, a low pressure system east of Japan moved eastward, and a low pressure system over the Sea of Okhotsk moved northeast.
Once again, the atmospheric pressure around Japan was high in the west and low in the east.
The pressure gradient became larger between these low pressure systems and the high pressure systems moving from the continent to the vicinity of Japan.
In northern Japan near the low pressure system, storm warnings were issued in some places.
On the 28th, waves rose in the waters near Japan, with waves rising in southeastern Hokkaido and the central and western parts of the Sea of Japan, and exceeding 5 meters in height off the coast of Noto.
On the 29th, it became a barge in the middle and northern part of the Sea of Japan, the Sea of Okhotsk, and the east of Japan.



#Sea surface temperature
Sea surface temperatures in the Japanese waters continued to be lower than normal along the coast of Hokkaido.
In the central and western parts of the country, sea areas with temperatures higher than normal or significantly higher expanded, with temperatures up to 3 C higher than normal.
The East China Sea has expanded to a normal level.
Western Kyushu was slightly higher than normal.
Sea areas south of Japan continued to be at normal levels, while areas off the coast of the Tokai Sea and near the Izu Islands expanded in areas with lower than normal levels.
The temperature in the east of Japan was significantly higher than normal, with a maximum of 4 C above normal.
The waters off the coast of Sanriku were at normal levels, the southeastern part of Hokkaido was significantly lower than normal, and the Sea of Okhotsk continued to be at normal levels.

Tomorrow, the 3rd (Wednesday), the coldest air of the season will arrive. There is a risk of snowfall even on flat areas in northern and western Japan on the Sea of ??Japan side.

2025/12/02 07:58

Tomorrow, the 3rd (Wednesday), the area around Honshu is expected to experience a winter-like atmospheric pressure pattern of high in the west and low in the east. At around 1,500 meters above the ground, strong cold air with temperatures below -6 C is expected to flow in, causing snow to fall even in flat areas. As a result, it will snow widely from northern Japan to western Japan on the Sea of Japan side, and there will be some places where it will snow even in flat areas.




Looking at the snow forecast for tomorrow, the 3rd (Wednesday), from northern Japan to the Sea of Japan side of the San'in area, as strong cold air moves south through the night, rain will turn to snow, and the snow is expected to cover a wide area.
Also, a line called the Japan Sea Polar Air Mass Convergence Zone (JPCZ) is expected to form over the Sea of Japan on the 3rd tomorrow, where the seasonal winds that are split into two in the mountainous region of the northern Korean Peninsula merge over the Sea of Japan (red dashed line in the diagram). Band-shaped snow clouds are expected to develop in this area, and the snow is expected to intensify with the addition of strong cold air in the upper atmosphere.

The snow is expected to peak on the night of Wednesday the 3rd. The purple areas are areas where snow is expected to be especially heavy, with increased snowfall mainly along the mountains from Tohoku to the San'in region, and there will be some places where it will snow even in flat areas. Additionally, the spacing between the isobar lines is narrow and northerly winds will become stronger, resulting in snowstorms in some places.

In Hokuriku, northern Kinki, and San'in areas, there are likely to be some places where news of the first snowfall will arrive, but it is also possible that the first snowfall will turn into snowfall. In addition, some of the strong cold air will also flow into the skies above Shikoku, so there is a possibility that it will snow in the mountainous areas of Shikoku and the Pacific side of the Tokai region into tomorrow, the 4th (Thursday).

From the 3rd tomorrow to the 4th, please be careful of poor visibility and traffic obstacles caused by the snowstorm, and if you are driving a car, please take all possible precautions, such as switching to winter tires.

Today's weather on the 2nd (Tuesday) The weather is going downhill from the afternoon from northern Japan to Hokuriku. Beware of blizzard in Hokkaido.

2025/12/02 06:52

Today, a developing low pressure system will advance over the Sea of Japan, and the low pressure system and front will pass near northern Japan. The weather is going downhill on the Sea of Japan side of northern Japan and Hokuriku. A front is expected to remain stationary in the south of Honshu during the night.



Hokkaido, Tohoku, and Hokuriku will experience rain and snow from the afternoon to evening due to the effects of low pressure and fronts. There may be localized lightning, so be careful of lightning, tornadoes, violent gusts of wind, hail, and hail. In Hokkaido, strong cold air in the sky is expected to move southward tonight, and the area of snow is likely to expand. Due to the developing low pressure, the distance between the isobar lines will narrow, and there will be some places where there will be blizzards. Please be aware of poor visibility due to snowstorms.



The sky around the Kanto region is cloudy, and there are likely to be showers in some places. It's a good idea to have a folding umbrella when you go out. The Ogasawara Islands are expected to experience rain through the morning due to the front, and the Izu Islands are likely to experience showers and thunderstorms in some places due to the front.

From the Tokai region to the west, there are many places where it is sunny, and there are places where the temperature can rise to nearly 20c during the day. A front is expected to gradually form in the south of Honshu in the afternoon, and showers are likely to occur in places on the Pacific side of western Japan. At the beginning of the night, there will be some showers in the shadows of the mountains.

Okinawa and Amami will be cloudy due to humid air, and there will be localized rain. There are likely to be places in the Sakishima Islands where there will be heavy rain with thunder from morning until noon. Please be careful about how it rains.

The weather has changed from the early spring weather, and General Winter has arrived!! Stormy weather and heavy snow on the Sea of ??Japan side of northern and eastern Japan. Snowfall on the Sea of ??Japan side of western Japan as well.

2025/12/01 12:56

Today, the 1st (Monday), the start of December will be a sunny day in many places.
However, things changed after Koharu weather. General Winter is expected to attack this week.
From around the 3rd (Wednesday), the strongest cold air of the season will move south over the Japanese archipelago.
Towards the 4th (Thursday), a winter-like atmospheric pressure pattern will occur, leading to rough weather mainly on the Sea of Japan side of northern and eastern Japan, with the risk of heavy snow.
There will be places where snow accumulates even on the Sea of Japan side of western Japan.
There is a possibility of the first snow in Hokuriku and the plains of western Japan.



#Toward winter-type air pressure distribution On the 3rd (Wednesday), a low pressure system will form east of the Kanto region and will continue to develop as it moves eastward through the east of Japan.
An anticyclone is protruding from the continent, and the area around Japan is expected to gradually become winter-like, with high pressure in the west and low pressure in the east.
And the strong cold air that is approaching the continent will flow into the skies over the Japanese archipelago from around the 3rd (Wednesday).
On the 4th (Thursday), a developed low pressure system will move through the Sea of Okhotsk, and a continental high pressure system will extend south of Japan, with a winter-like pressure pattern expected to continue mainly in northern Japan.
The cold air, which is below -6c at around 1500m above the ground, which is the standard for snow in flat areas, will move southward to the Pacific side of eastern and western Japan from the night of the 3rd (Wednesday) to the 4th (Thursday).
The coldest air of the season is heading south, almost like midwinter.

#Snowfall is rapidly increasing. Warning-level heavy snowfall, fear of storms. Snowfall expected in western Japan as well



From the 3rd (Wednesday) to the 4th (Thursday), snow will continue to fall intermittently along the Sea of Japan side of northern Japan, Hokuriku, and the northern mountains of Kanto-Koshin, and snowfall is expected to increase rapidly.
It will snow even in the plains of Hokuriku, making it the first snow in some places.
On the 4th (Thursday), there is a risk of warning-level heavy snow mainly along the mountains on the Sea of Japan side of northern and eastern Japan.
Also, the spacing between the isobars will become closer, and the northerly monsoon winds will become stronger.
The weather is likely to be rough from the 3rd (Wednesday) to the 4th (Thursday), with strong winds and high waves mainly on the Sea of Japan side of northern and eastern Japan.
There are some places where there will be a blizzard, which may affect transportation.
In western Japan, it will snow in the mornings and evenings even in the northern Kinki region and the plains of the San'in region, and there will be places where you will receive news of the first snowfall.
On the Sea of Japan side of western Japan, snow is expected to accumulate in some places, mainly along the mountains.
Please be careful of snowfall and changes in road conditions, and be sure to use winter tires when driving.

# A change from a sunny early spring; winter cold from the 3rd to the 5th; cold bottom on the 4th
Temperatures are expected to be lower than normal in western Japan and Hokuriku on the 3rd (Wednesday).
The 4th (Thursday) will be the coldest day, with temperatures nationwide dropping below normal.
From Okinawa to Tohoku, temperatures are expected to be much lower than normal in many places.
On Friday the 5th, temperatures will be lower than normal across the country.
Please prepare cold weather gear to avoid getting sick due to the sudden cold.

Northern Japan is at risk of stormy weather as a developing low-pressure system passes through. Be careful and be on guard against increasing rain and wind.

2025/12/01 06:57

A low pressure system accompanied by a front is moving east-northeast across the Sea of Japan. The low pressure system will pass through the Soya Strait into the Sea of Okhotsk through the evening of the 1st, and the front will pass through the Tohoku region. As a result, the gradient in atmospheric pressure will increase in the Hokkaido region, and on the Sea of Japan side, winds are expected to be extremely strong today, mainly over the sea.
As of 6:20 a.m., a storm warning has been issued for the Rumoi and Ishikari regions.

Also, the atmospheric conditions in northern Japan will be extremely unstable due to the effects of warm, humid air heading towards low pressure systems and fronts, as well as cold air in the upper atmosphere. In the Tohoku region, cumulonimbus clouds are expected to develop and thunderstorms are expected to occur in some places. In the northern part of Tohoku on the Sea of Japan side, the ground has become loose in some places due to previous rain, so even a small amount of rain can increase the risk of landslides and lead to warning-level heavy rain.



#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected for today 1st
Northern land on the Sea of Japan side 18m/s (30m/s)
Northern Sea on the Sea of Japan side Upper 20m/s (30m/s)
Southern land on the Sea of Japan side 18m/s (30m/s)
Southern sea on the Sea of Japan side 18m/s (30m/s)

# Expected amount of rain (in most places)
+1-hour precipitation expected today on the 1st
Northern Tohoku Sea of Japan side 20mm
+24-hour precipitation expected by 6:00 tomorrow 2nd (Tuesday)
Tohoku Sea of Japan side Northern area 40mm

[Disaster prevention matters]
On the Sea of Japan side of Hokkaido, the wind will blow very strongly mainly at sea today, so please be on guard for strong winds from noon until evening today. Depending on the degree of development of the low-pressure system, the period and area of stormy winds may expand.

In the northern part of Tohoku on the Japan Sea side, the ground has become loose in some places due to the rain that has fallen so far. Please be careful and be on guard against landslides caused by heavy rain from early tonight on the 1st.
Also, in northern Japan, please be careful of damage to crops and agricultural facilities due to strong gusts such as tornadoes, lightning, sudden heavy rain, and hail from the evening of today 1st.