Stormy weather in Hokkaido, maximum instantaneous wind speed exceeds 30 m/s, warning of strong winds, winter chill in the sky, new snowfall

2025/10/28 11:55

Today, the 28th (Tuesday), a low-pressure system in the Sea of Okhotsk is developing and moving northeast, creating a winter-like pressure pattern with high pressure in the west and low pressure in the east, centered on northern Japan.
There is a large gradient in the atmospheric pressure, resulting in rough weather in Hokkaido, and storm warnings have been issued in some places, mainly on the Sea of Japan side.
Also, near 5,500m above Hokkaido, cold air with temperatures below -36c, which is strong for this time of year, is flowing into the air, making the atmospheric condition unstable.



#Hokkaido storm warning announced In Hokkaido, where the maximum instantaneous wind speed exceeds 30 m/s, the winter pressure distribution is high in the west and low in the east, and the pressure gradient is increasing in Hokkaido, where stormy winds are raging.
The maximum instantaneous wind speed until 10 a.m. today, the 28th (Tuesday), was 31.4 m/s at Cape Soya in Wakkanai City, 31.3 m/s at Cape Erimo in Erimo Town, and 30.1 m/s at Hatsuyamabetsu in Hatsuyamabetsu Village, with some locations exceeding 30 m/s.
More than 25m/s was observed in urban areas such as Rumoi City and Muroran City.
As of 10:30 a.m., a storm warning has been issued for the Rumoi, Ishikari, and Hiyama regions of Hokkaido.
Towards the evening, the wind will be very strong from the west, mainly on the Sea of Japan side.
Beware of strong winds.



#Sky over Hokkaido Strong winter cold air for this time of year
A strong winter cold air for this time of year is flowing into the vicinity of 5500m above Hokkaido, with temperatures below -36c, making the atmospheric condition unstable.



Snow and rain are falling over a wide area from the Sea of Japan side of northern Japan to Hokuriku.
There is snow in the inland areas of Hokkaido and the mountainous areas of Tohoku.
Up to 10 a.m. today, the 28th (Tuesday), the snow depth was 13 cm at Sukayu in Aomori City, Aomori Prefecture, 8 cm at Sounkyo in Kamikawa Town, Hokkaido, and 6 cm at Kamikawa in Kamikawa Town, Hokkaido.
In Hokkaido, new snow is expected to accumulate, mainly in the northern part of the Sea of Japan.
Until dawn on Wednesday the 29th, please be careful of traffic disruptions due to heavy snow and snow buildup on power lines due to wet snow.

Northern Japan/Eastern Japan Atmospheric instability

2025/10/28 08:43

There is a low pressure system in the Sea of Okhotsk that is moving northeast. There is a high pressure system over the Yellow Sea that is moving eastward. Near Japan, the atmospheric pressure is high in the west and low in the east.



Today, strong cold air will flow over northern and eastern Japan, making the atmospheric conditions extremely unstable.
In northern and eastern Japan, please be careful of severe gusts such as lightning and tornadoes on the 28th.
There is also a risk of hail, so please be careful when managing crops and agricultural facilities.

[Go home early] Hokkaido: Rain turns to snow at night. Snow falls on flat areas tomorrow. Beware of strong winds. Low pressure system is rapidly developing.

2025/10/27 13:03

Today, the 27th (Monday), a low pressure system accompanied by a front is moving northeast in the sea near Chishima Island, and will rapidly develop into the Sea of Okhotsk through tonight.



An anticyclone is protruding from the continent, and the area around Japan is expected to have high pressure in the west and low pressure in the east until tomorrow, the 28th (Tuesday).
The gradient of atmospheric pressure will increase near Japan, and around 1500 meters above Hokkaido, strong cold air will move south for this time of year with temperatures below -6c.



Today, the 27th (Monday), atmospheric conditions will be unstable in Hokkaido due to the influence of cold air in the upper atmosphere, and caution should be taken against sudden strong rain, lightning, gusts of wind, and hail.
In addition, temperatures will drop in the afternoon, and rain will turn to snow in the mountains at night.
Not only in northern Hokkaido, but also in the Oshima and Hiyama regions in southern Hokkaido and the Iburi and Hidaka regions in central Hokkaido, it is expected that snow will fall intermittently in high mountain passes and mountainous areas from tonight until tomorrow 28th (Tuesday), resulting in snow accumulation in some places.
There is a risk of snowfall even in flat areas.
Please be careful of traffic obstructions due to snowfall and frozen roads.



Additionally, as the low pressure system rapidly develops and moves towards the Sea of Okhotsk, winds are expected to gradually increase in northern Hokkaido.
From the evening of today, the 27th (Monday) to tomorrow, the 28th (Tuesday), westerly winds will become stronger, blowing very strongly at sea, and causing sea barges.



Maximum instantaneous wind speeds of 35 m/s are expected on land, mainly along the coast of northern Hokkaido.
Please be on guard for strong winds from late evening today, the 27th (Monday) until noon on the 28th (Tuesday) tomorrow.
Depending on the course of the low pressure system and the extent of its development, the period of stormy winds may expand.
It will also snow, so be careful of poor visibility due to blizzards.

Today, the 27th (Monday), it is safe to go home early before the snow turns to snow and the wind picks up.

Weekly weather: Very strong cold air moving south in Hokkaido. Will the next three-day weekend start with rain over a wide area

2025/10/27 07:49

From now on, at the beginning of the season, Hokkaido will experience snow even in flat areas, especially in northern Hokkaido, due to the influence of strong cold air. In the latter half of the
period and the beginning of the next three-day holiday (November 1st to 3rd), it is likely to rain in many places due to the effects of low pressure.



A low pressure system will develop in the Sea of Okhotsk into tomorrow, the 28th (Tuesday), and northern Japan will experience a strong winter-like pressure pattern. In addition, extremely cold air with temperatures below -36 C will flow into Hokkaido approximately 5,000 meters above the ground, resulting in snow even on flat areas, especially in northern Hokkaido, and strong winds that will cause blizzards in some places.
Please be aware of road conditions due to snow accumulation, poor visibility due to blizzard, and traffic obstructions.
Tomorrow, the 28th, due to the influence of cold air moving south from Tohoku to eastern Japan, it will snow in the high mountains, and it is likely that some places will receive news of the first snowfall.



On the 29th and 30th, the area around Honshu will be covered by high pressure, and many places will be sunny. However, Okinawa is susceptible to fronts and will likely be cloudy and rainy.

From around the 31st (Friday) in the latter half of the week to the 1st (Saturday), the beginning of the next three-day weekend, a low pressure system is expected to develop and pass near Honshu. As a result, the weather will turn downward from the west, causing rain over wide areas of western and eastern Japan. Be careful of heavy rain with localized thunderstorms. In northern Japan, the wind is likely to pick up again and the weather will be rough.
Around the 2nd (Sunday), another new low pressure system is expected to form behind the low pressure system accompanying the front and move through the Sea of Japan. Western and eastern Japan will be covered in high pressure around the middle of the three-day weekend, and the weather is likely to improve mainly on the Pacific side, but in northern Japan, the atmospheric conditions will become unstable mainly on the Sea of Japan side, and there is a possibility that the weather will continue to be rough.

Although the current forecast is uncertain, such as the path of the low pressure system, predicted degree of development, and extent of rain, if you have plans for the next three-day weekend, please be sure to check the latest weather information that will be updated in the future.

Strong cold air is expected to flow over Hokkaido on the 28th, indicating heavy snow. Possibility of a blizzard in northern Hokkaido.

2025/10/26 21:19

From tomorrow the 27th (Monday) to the 28th (Tuesday), the area around Japan is expected to experience a strong winter-like atmospheric pressure pattern.
On the 28th (Tuesday), extremely cold air with temperatures below -36c at an altitude of approximately 5000m is expected to flow into the sky over Hokkaido.



In Hokkaido, there will be places where the snow will change from the night of the 27th tomorrow. Tomorrow, on the 28th, snow is expected to fall on flat areas in inland Hokkaido, especially in northern Hokkaido, and snow is expected to spread to areas in central and southern Hokkaido.
There is a risk of heavy snowfall and increased snowfall along the mountains, as well as strong winds and rough weather, leading to poor visibility and traffic problems due to the blizzard.



There is an increasing possibility that a strong wind and blizzard warning will be issued from the 27th to the 28th, especially in the Soya region, Kamikawa, and Rumoi regions. Pay attention not only to the latest weather information, but also to traffic information.

Also, the cold air that causes snow to fall along the mountains will move south from southern Tohoku to the Hokuriku region, so there is a possibility of snow falling along the high mountains from Tohoku to eastern Japan on the 27th and 28th. When driving on mountain passes, you need to pay attention to the condition of the road surface. Be sure to prepare for winter tires as early as possible.

On the Pacific side of Hokkaido, the rain and wind will increase from this morning until tomorrow morning. Be careful of heavy rain and strong winds.

2025/10/26 07:52

A low pressure system accompanied by a front is expected to pass near Hokkaido from the night of the 26th today to the morning of the 27th tomorrow. Atmospheric conditions will become unstable as warm, humid air flows toward low pressure and fronts. Additionally, from the afternoon of the 27th tomorrow until the 28th, the atmospheric pressure is expected to be high in the west and low in the east, with the gradient of atmospheric pressure increasing.

On the Pacific side of Hokkaido, there will be heavy rain with localized thunderstorms from the night of today, the 26th, to the early hours of tomorrow, the 27th, resulting in heavy rain in some places. Please be careful about flooding of low-lying areas, landslides, and rising river waters due to heavy rain.
In the Hokkaido region, extremely strong winds are expected to blow mainly over the sea from the afternoon of the 27th tomorrow until the 28th. Please be careful of strong winds and high waves on the Sea of Japan side tomorrow on the 28th.
Depending on the course of the low pressure system and the extent of its development, there is a risk of warning-level heavy rain, strong winds, and severe storms. Please pay attention to the latest weather information.



#Forecasted rainfall (in areas where there is a lot of it)
+1-hour precipitation expected for today 26th
Southern Sea of Japan side 30mm
Western Pacific side 30mm
Eastern Pacific side 30mm
+Forecasted for tomorrow 27th 1-hour precipitation
Eastern Pacific side 30mm
+24-hour precipitation expected by dawn on the 27th tomorrow
Southern Sea of Japan side 60mm
Western Pacific side 80mm
Eastern Pacific side 80mm



#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected on tomorrow 27th
Northern land on the Sea of Japan side 18 meters (30 meters)
Northern sea on the Sea of Japan side 20 meters (30 meters)
Southern land on the Sea of Japan side 18 meters (30 meters)
Southern sea on the Sea of Japan side 20 meters (30 meters) )
Pacific side western land 15 meters (30 meters) Pacific side west sea 18 meters (30 meters)
Pacific side Eastern land 15 meters (30 meters)
Pacific side Eastern Sea 20 meters (30 meters)
Northern land on the Sea of Okhotsk side 15 meters (30 meters)
Sea of Okhotsk Northern sea side: 18 meters (30 meters)
Sea of Okhotsk side, southern land area: 12 meters (25 meters)
Sea of Okhotsk side: southern sea areas: 18 meters (30 meters)
It is expected that there will be places where extremely strong winds will continue the day after tomorrow and the 28th.

#Expected wave height
+Expected wave height for tomorrow 27th
Northern Sea of Japan side 4m
Southern Sea of Japan side 4m
Western Pacific side 4m
Eastern Pacific side 4m
It is expected that it will be at sea on the 28th tomorrow.

Today's weather on the 26th (Sunday): Umbrellas are in use across a wide area. The weather is going downhill in northern Japan as well.

2025/10/26 06:42

Today, the 26th (Sunday), multiple low pressure systems and fronts are expected to move near Japan. The rain will spread across eastern and northern Japan, and it looks like it will be a day when umbrellas will be useful in many areas.



Clouds tend to spread over Hokkaido and northern Tohoku, and the area of rain will gradually expand from around noon. Don't forget to bring rain gear even if it's not raining when you go out.

It has been raining widely from the southern Tohoku region to the Kinki region since the morning, and it will be raining heavily into tonight, so it looks like the weather will be unfortunate for going out. During the day, it feels relatively comfortable, but if you get wet from the rain, it can feel chilly.

Chugoku and Shikoku will have some rain until the morning, but the weather will gradually improve. There are many places in Kyushu where it will be sunny, and the temperature is likely to rise. There will be a large difference in temperature between morning and evening and during the day, so please be careful when choosing clothing.

Widespread rain on Sunday Warning-level heavy rain in the Tokai and Kanto regions Early next week, high pressure in the west and low in the east Hokkaido could experience severe storms with rain and snow

2025/10/25 13:11

Weekly Weather Forecast
# Widespread rain tomorrow Sunday, warning-level heavy rain possible in the Tokai and Kanto regions
# At the beginning of the week, atmospheric pressure will be high in the west and low in the east. Hokkaido will turn from rain to snow. Heavy storms



# Widespread rain tomorrow Sunday; warning-level heavy rain possible in the Tokai and Kanto regions
Today, the 25th (Saturday) night, a low pressure system will form off the coast of Shikoku on a front extending from Okinawa to the Ogasawara coast, and is expected to continue to develop and move toward the Izu Islands through tomorrow 26th (Sunday).
Also, tomorrow, the 26th (Sunday), a low pressure system will form in the central part of the Sea of Japan and the coasts of San'in and Hokuriku and will move northeast.
Tomorrow, the 26th (Sunday), there will be showers in Okinawa.
In Kyushu, the sun is likely to reach through the gaps in the clouds, but in the Shikoku-Kinki region, there are many places where it will rain in the morning, and there will be thunderstorms in some places.
It will rain in many places in the Tokai region until the evening and in the Kanto region until night, and the atmospheric conditions will be unstable due to the influence of warm, humid air moving toward low pressure and fronts.
It is expected that there will be localized areas with thunderstorms and heavy rain like an overturned bucket.
There is a risk of warning-level heavy rain in Shizuoka Prefecture and the Kanto region.
Please be careful of landslides, flooding of low-lying areas, and rising river waters.
There are places in Hokuriku and southern Tohoku where it will rain throughout the day, and in northern Tohoku it is expected to start raining in the evening, and in Hokkaido it is expected to start raining in the afternoon.
In Hokkaido, there will be places where it will rain heavily with thunder from evening to night.





#At the beginning of the week, high pressure in the west and low pressure in the east Hokkaido will turn from rain to snow. Heavy storms
On the 27th (Monday) at the beginning of the week, a low pressure system is expected to develop and move towards the Sea of Okhotsk, and a continental high pressure system is expected to overhang near western Japan.
Towards the 28th (Tuesday), a developed low pressure system will slowly move eastward over the Sea of Okhotsk, resulting in a high pressure system in the west and low pressure in the east.
The cold air, below -6c, which is expected to cause snow even on flatlands if it rains at around 1500m above the ground, is expected to move southward to near Hokkaido again.
On the 27th (Monday), there will be some places in Sapporo where rain will be mixed with snow.
On the 28th (Tuesday), rain is expected to change to snow in more places in northern and central Hokkaido.
There will be snowfall even in flat areas in the inland areas.



Also, depending on the degree of development of the low pressure system, from the 27th (Monday) to the 28th (Tuesday), there is a risk that strong winds will blow over Hokkaido, causing heavy rain and severe storms.
Please pay attention to the latest information.

Widespread rain on Sunday. Tokai-Kanto warning level heavy rain Early next week, high pressure in the west and low in the east. Hokkaido could experience heavy rain with snow.

2025/10/24 12:27

Weekly Weather Forecast
#Saturday weather downhill; widespread rain on Sunday; Tokai-Kanto warning-level heavy rain
#Opening the week with high pressure in the west and low pressure in the east; rain to snow in Hokkaido; stormy weather in Hokkaido
#Next week, colder than normal days; higher than normal temperatures in early November



#Saturday weather downhill It will rain widely on Sunday, with heavy rain reaching the Tokai to Kanto warning level
Over the weekend, due to the effects of low pressure and fronts, the weather will turn downhill, and heavy rain is expected to reach the warning level in some places.
On Saturday the 25th, a low pressure system will form in the western Japan Sea and move northeast, and in the evening another low pressure system will form on a front extending from Okinawa to the south of Japan.
On the 26th (Sunday), a low pressure system in the western Japan Sea is expected to move toward the northern Japan Sea, and another low pressure system on the front is expected to move toward the Izu Islands.
Also, a new low pressure system will form near the Noto Peninsula and will move towards northern Japan with the front through the night.
On Saturday, the 25th, there will be a lot of clouds in Okinawa even though the rain has stopped, and there will be some places in southern Kyushu where the sunshine will return.
Shikoku will experience intermittent rain, and more places in the Kinki, Tokai, and Kanto-Koshin regions will start to experience rain in the afternoon.
On the 26th (Sunday), sunlight is expected to reach Kyushu through the gaps in the clouds, but occasional rain is expected from Shikoku to Kinki.
In the Tokai and Kanto regions, the rain will come and go, and atmospheric conditions will be unstable due to the influence of warm, humid air heading toward low pressure and fronts.
In Shizuoka, Kanagawa, and Chiba prefectures, the rain and wind will become stronger and there is a risk of warning-level heavy rain.
It will gradually start to rain north of Hokuriku.



#Pressure pattern with high in the west and low in the east at the beginning of the week Hokkaido rain turns to snow It's going to be very rough
The new week starts on the 27th (Monday), when a low pressure system is expected to develop and move toward the Sea of Okhotsk, and a continental high pressure system will overhang near western Japan.
The atmospheric pressure will be high in the west and low in the east until the 28th (Tuesday).
The cold air, below -6c, which is expected to cause snow even on flatlands if it rains at around 1500m above the ground, is expected to move southward to near Hokkaido again.
On the 27th (Monday), there will be some places in Sapporo where rain will be mixed with snow.
From the 28th (Tuesday) to the 29th (Wednesday), more places in northern and central Hokkaido are expected to experience a change from rain to snow.
There will be snowfall even in flat areas in the inland areas.
Also, depending on the degree of development of the low pressure system, there is a risk of strong winds blowing over Hokkaido, resulting in heavy storms and severe storms.
Please pay attention to the latest information.





#Next week, temperatures will be lower than normal.In early November, temperatures will be higher than normal
On the 25th (Saturday), temperatures will be lower than normal in many places north of the Kanto region, and next week from the 28th (Tuesday) to the 29th (Wednesday) in Kyushu and Hokkaido.
From around the 30th (Thursday), the number of places with higher than average temperatures will once again increase, and by the start of November, it is expected to reach extremely high temperatures, especially in northern Japan.
The temperature fluctuates daily, so please take care of your health.

Today's 24th (Friday) weather: Honshu is widely sunny in autumn, and the Nansei Islands should be careful of heavy rain

2025/10/24 10:29

Today, the 24th (Friday), many places will be covered in high pressure and will have clear autumn skies. On the other hand, unsettled weather is likely to continue in the Nansei Islands, where the front is stationary.



Hokkaido will receive sunshine, but there is a chance of showers in the morning. When you go out, it's a good idea to have a folding umbrella with you just in case.
Although there are some places in the northern Tohoku region where the rain will remain until the morning, the weather seems to be on its way to recovery.

The sun shines on the Sea of Japan side from the southern Tohoku region to the northern Kyushu region, making the weather pleasant and sunny during the day. There will be clouds on the Pacific side, but there will also be periods of sunshine. Although the temperature in many places exceeds 20c during the day, it gets colder in the morning and evening, so please be aware of the temperature difference throughout the day.

From southern Kyushu to Okinawa, clouds tend to spread due to fronts and moist air, and the weather in the Nansei Islands will gradually become more prone to rain. Please be careful as there is a possibility that the thunderstorm may become stronger temporarily.