The Sea of ??Japan side from Tohoku to Hokuriku is experiencing rough weather. Be careful and be cautious of heavy rain and strong winds

2025/11/02 17:42

There are low pressure systems over Hokkaido and the western Sea of Japan, which are moving northeast and east, respectively.
The low pressure system in the Sea of Japan will approach the northeast Sea of Japan side towards the morning of the 3rd, and after that, the pressure will temporarily become high in the west and low in the east, and the gradient of the pressure will become larger.
Also, through the 3rd, strong cold air is expected to flow into the air at an altitude of approximately 5,500 meters, with temperatures below -30 degrees Celsius in northern and eastern Japan, and below -24 degrees Celsius in western Japan.
For this reason, atmospheric conditions from northern Japan to western Japan will be extremely unstable due to strong cold air and low pressure in the upper atmosphere.



If rain clouds develop more than expected in the Tohoku and Hokuriku regions, there is a possibility of warning-level heavy rain.
Also, if the pressure gradient in the sea off the Sea of Japan side of northeastern Japan becomes larger than expected, there is a possibility of warning-level winds from the north.



###Rain Forecast
In the Tohoku and Hokuriku regions, there will be heavy rain or strong rain accompanied by thunder in some places through the 3rd.
There are places where the ground has become loose due to the heavy rains so far, and the risk of landslides may increase even with little rainfall.

The predicted hourly precipitation from the 2nd to the 3rd is 20 mm in some places,
on the Sea of Japan side of Tohoku.

The predicted precipitation for the 24-hour period from 6pm on the 2nd to 6pm on the 3rd is expected to be 60mm in some places,
on the Sea of Japan side of Tohoku.
Hokuriku region 100mm.



###Wind forecast
Maximum wind speed (maximum instantaneous wind speed) expected on the 3rd
Tohoku Sea of Japan side, sea, 18 meters (30 meters).
Tohoku Japan Sea side land 13 meters (25 meters).

###Disaster Prevention Matters
In the Tohoku and Hokuriku regions, please be careful of landslides, flooding of low-lying areas, and rising river waters through the 3rd.
Be careful of thunderstorms, tornadoes, severe gusts of wind, and short periods of heavy rain from northern Japan to western Japan until the 3rd.
If there are signs that a cumulonimbus cloud is approaching, please take precautions such as moving inside a building.
There is also a risk of hail, so please be careful about managing crops and agricultural facilities.

Be careful of sudden thunderstorms on the Sea of ??Japan side of northern Japan and Hokuriku on today, the 2nd (Sunday), the middle day of the three-day holiday.

2025/11/02 08:02

Today, the 2nd (Sunday), the middle day of the three-day holiday, is expected to be sunny in many places from eastern Japan to the Pacific side of western Japan.
On the other hand, in areas along the Sea of Japan from northern Japan to northern Kyushu, atmospheric conditions become unstable due to strong cold air in the upper atmosphere and low pressure moving across the Sea of Japan.

In Hokkaido, the wind will be weaker than the previous day, the 1st (Saturday), but due to the influence of a low pressure system moving through the Sea of Japan, rain will come and go. It looks like it will snow in some places along the mountains.



Be careful of sudden changes in weather, especially in the afternoon, on the Japan Sea side from Tohoku to northern Kyushu.
Looking at the probability of a lightning strike at 3:00 p.m. today, the 2nd (Sunday), there is an area with a particularly high probability of a lightning strike extending from the Sea of Japan side of northeastern Japan to the Hokuriku region. The predicted probability is over 90% in many places, and people need to be careful of short-term sudden rain, thunderstorms, lightning strikes, hail, tornadoes, and other violent gusts.



Additionally, in areas on the Sea of Japan side, westerly winds are expected to strengthen due to the influence of the low pressure system. Please be careful of strong winds and high waves, especially in coastal areas.



From tonight until tomorrow 3rd (Monday), cold air with temperatures below 0c at an altitude of approximately 1500m is expected to move south toward Honshu. Some of the cold air is expected to move south into the skies over the Chugoku Mountains and Shikoku Mountains, and snow may fall in some places in the high altitude mountainous regions of Honshu into the 3rd of tomorrow. If you are planning a leisure trip to the mountains, please be aware of the road conditions.

Typhoon No. 25 (Karmaegi) occurs off the east coast of the Philippines.

2025/11/01 23:36

At around 9:00 pm on Saturday the 1st, a tropical cyclone became Typhoon No. 25 over the east coast of the Philippines.

#Typhoon No. 25 1st (Sat) As of 10pm
===================
Center location East of the Philippines
Moving speed West-northwest 20km/ h
Central pressure 1000hPa
Maximum wind speed 18m/s (near the center)
Maximum instantaneous wind speed 25m/s
=================



Typhoon No. 25 is expected to take a westerly course and intensify as it passes near the Philippines. By 9pm on the 5th, it is expected to move toward the South China Sea, accompanied by stormy winds, and to intensify into a strong force around the 6th and 21st.
If you are planning to travel to Southeast Asia in the future, please pay attention to the latest typhoon information.

Typhoon No. 25 is not expected to have any direct impact on areas near Japan.

#Number of typhoons occurring and landing in 2025
The average number of typhoons that occur in a year is 25.1. In 2025, 25 typhoons have occurred by November 1st.

There were three typhoons that made landfall in 2025: Typhoon No. 5, which made landfall near Cape Erimo in Hokkaido in July, Typhoon No. 12, which made landfall near Hioki City, Kagoshima Prefecture in August, and Typhoon No. 15, which made landfall in Kochi Prefecture in September and re-landed in Wakayama Prefecture. The average number of typhoons that make landfall is 3, and both the number of typhoons that occur and the number of typhoons that make landfall in 2025 will remain at the same level as normal.

The number of typhoons in November was 2.2, making it still a time when typhoons are likely to occur. Please continue to pay attention to the latest typhoon information.

[Typhoon No. 25 to occur] Typhoon egg (tropical cyclone) is developing and heading west. Has it developed into a "strong typhoon" What is the future course

2025/11/01 14:07

Today, November 1, 2025 (Saturday) at 9 a.m., the Japan Meteorological Agency announced that a tropical cyclone in the Caroline Islands is expected to develop into a typhoon within 24 hours.



The next typhoon will be typhoon number 25.

The number of typhoons that occur in a normal year is 25.1,
which is about the same level as a normal year.




After this, the tropical cyclone is expected to advance over the warm ocean,
and move westward while developing.

It is expected to become a typhoon by tomorrow,
after passing through the Philippines, it is expected to intensify into a ``strong typhoon'' in the
South China Sea, accompanied by stormy winds.

Currently, there is no direct impact on Japan, but
in the past, there was a typhoon that came to the Philippines in November and caused heavy damage.

In addition, in the past, typhoons have made landfall in Japan at the end of November, so it is still a time when we cannot let our guard down as the typhoon season is over.

Please continue to pay attention to the latest typhoon information.

[Holidays/weekly weather] Typhoon-like winds at Cape Erimo, Hokkaido 49.1m/s Today, there is a storm in the north, summer days in the west, and warning-level heavy rain in Hokuriku during the latter half of the holidays

2025/11/01 12:17

Today, November 1st (Saturday), the first day of the three-day holiday, the weather is very stormy, mainly in northern Japan, due to a rapidly developing low pressure system.



As of 9 a.m. on the 1st (Saturday), the developing low pressure system is
moving northeastward south of Cape Erimo, Hokkaido.

The central pressure has dropped to 976hPa,
compared to the central pressure of 1012hPa as of 9:00 a.m. yesterday, Friday the 31st.
The pressure has dropped by 36hPa in just 24 hours, and is rapidly developing.

After 9 a.m., a maximum instantaneous wind speed of 49.1 m/s was observed at Cape Erimo, Hokkaido, recording the strongest instantaneous wind speed since statistics began in 2008.

The winds are as strong as a typhoon,
Hokkaido should be on guard against strong winds and high waves late into the night.

Also, the rain is getting heavier,
There are many places in Hokkaido where it is raining heavily.

Also, as a low pressure system approaches, tide levels are rising along the coast.
Please be extremely cautious of flooding of low-lying land due to high tides into the evening.



Meanwhile, the weather is improving and warm air is flowing towards the low pressure system
Temperatures are rising on the Pacific side of western and eastern Japan
The maximum temperature by noon was 23.9c in Ushiku, Chiba Prefecture,
23.3c in Tokyo's Edogawa Rinkai,
22.5c in Uwajima City, Ehime Prefecture, making it hot enough to make you sweat.

In western and eastern Japan, there are some places in the summer where the daytime temperature exceeds 25 degrees Celsius, but at night the temperature drops to the point where you need a jacket, so it would be a good idea to spend today in clothes that are easy to take off.



Tomorrow, the 2nd (Sunday), a low-pressure system with cold air in the sky will move northeast across the Sea of Japan, and rain and thunderstorms are likely to occur in many places, mainly on the Sea of Japan side north of the Sanin area.
Be careful of sudden strong rain, lightning, strong gusts of wind such as tornadoes,
hail, etc.

If you are thinking about mountain leisure, please be aware of sudden changes in the weather.

A low pressure system will pass the next day, the 3rd (Monday), and the pressure will gradually become winter-like.


A strong cold air that is about 5 to 10 degrees Celsius lower than normal has temporarily flowed in,
It looks like there will be some places in Hokkaido where it will snow again.

Also, Hokuriku and other areas will continue to experience rainy conditions.



Tuesday, the 4th after the holidays, will be covered by high pressure, and
it is expected that many places will have autumn sunshine.

The morning after the holidays, radiative cooling will be stronger,
It is likely that some places will experience the coldest weather this fall.
Please be careful not to lose your physical condition due to the difference in temperature.

The weather is already going downhill from the west on the 5th (Wednesday), and it will rain mainly in western and eastern Japan on the 6th (Thursday).

Today's weather (Saturday): Stormy weather in northern Japan; clear skies in many places from Kanto to the west

2025/11/01 06:35

Today, the 1st (Saturday), the start of November, there is a risk of stormy weather with strong rain and wind mainly in northern Japan due to the effects of a rapidly developing low pressure system. On the other hand, it looks like it will be sunny and a good day for going out on the Pacific coast west of the Kanto region.



In northern Japan, the rain will become heavier in the morning, and there is a risk of locally extremely heavy rain or thunderstorms. Please be extremely careful about landslides, flooding of low-lying areas, rising water levels and flooding of rivers. Additionally, winds will be strong throughout the day, with the possibility of storms. Please take measures such as moving items that can easily be blown away indoors.
In Hokkaido, strict vigilance is required in the Kushiro and Nemuro regions from early morning until evening due to flooding of low-lying land due to high tides.

The weather is likely to rain from Hokuriku to the Sanin area. In Hokuriku, there are places where it will rain heavily in the morning, so be careful.

It will be sunny and the sun will reach from the Kanto region to the Pacific Ocean side in the west. However, there is a possibility of rain showers, so it is a good idea to bring a foldable umbrella when going out. During the day, the temperature will rise from yesterday, exceeding 20c in many places, making it a pleasant experience. It can get cold in the mornings and evenings, so please be careful when choosing your clothes.

Tomorrow 1st (Saturday), the first day of the 3-day holiday, there is a risk of severe weather in northern Japan. Beware of warning-level heavy rain and storms.

2025/10/31 18:40

A low-pressure system accompanied by a front near the Kii Peninsula is expected to rapidly develop over the course of tomorrow 1st (Saturday), passing near the Kanto region, and reaching the waters near the Chishima Islands by the evening of tomorrow 1st (Saturday).

Atmospheric conditions are expected to be extremely unstable from western to northern Japan into tomorrow 1st (Saturday) due to the effects of warm, humid air flowing toward low pressure systems and fronts, and cold air in the upper atmosphere that is strong for this time of year.
Also, due to the rapidly developing low pressure system, there will be heavy rain and heavy rain in northern Japan tomorrow, the 1st (Saturday), and the tide level will be high in some parts of Hokkaido.

Northern Japan should be on high alert for strong winds, high waves, landslides, inundation of low-lying land, and rising water levels and flooding of rivers tomorrow, the 1st (Saturday).In the Hokkaido region, strict vigilance is required to avoid inundation of low-lying land due to high tides. In addition, from tomorrow 1st (Saturday), eastern Japan should be careful of landslides, flooding of low-lying areas, rising river levels, strong winds, and high waves, and western and northern Japan should be careful of strong gusts such as lightning and tornadoes.
If there are signs that a developed cumulonimbus cloud is approaching, there is a risk of hail, so please be careful about managing crops and agricultural facilities.



After that, from the 2nd (Sunday) to the 3rd (Monday/Holiday) the next day, there is a risk that the atmosphere will continue to be unstable, with severe cold air flowing into the sky for this time of year, leading to sudden changes in the weather mainly from northern Japan to the Sea of Japan side of western Japan.




[Wind Forecast]
Due to the effects of a rapidly developing low pressure system, extremely strong winds will blow in northern and eastern Japan tomorrow the 1st (Saturday).
#Expected wind strength
+Maximum wind speed (maximum instantaneous wind speed) expected for tomorrow 1st (Saturday)
Hokkaido region 28m/s (40m/s)
Tohoku region 28m/ s (40m/s)
Kanto-Koshin region 23m/s (35m/s)

[Wave forecast]
It will be a big wave in northern Japan tomorrow the 1st (Saturday), and it will be a barge in eastern Japan.
#Expected wave height
+Expected wave height for tomorrow 1st (Saturday) (with swell)
Hokkaido region 7m
Tohoku region 7m
Seki Higashi-Koshin region 5m

[Rain forecast]
In eastern and northern Japan, there will be very heavy rain accompanied by thunder and heavy rain in some places until tomorrow 1st (Saturday).
#Forecasted amount of rain (in areas where there is a lot)
+Precipitation expected for 24 hours by 18:00 tomorrow 1st (Sat)
Hokkaido region 150mm
Tohoku region 150mm
Kanto-Koshin region 150mm

Halloween ~ Tomorrow's rapid development of low-pressure system; warning level of heavy rain, maximum instantaneous wind speed of 40m/s, fear of severe storms in northern Japan

2025/10/31 11:47

Today, Friday the 31st (Halloween), a low pressure system will form on a front extending from the East China Sea to the south of Japan, and is expected to move northeast on the Pacific side of Honshu.



Tonight, the predicted central pressure of this low pressure system is 1000hPa, but it will rapidly develop to 968hPa in 24 hours until tomorrow, November 1st (Saturday), and will reach the waters near Chishima.



As warm, humid air flows toward the low pressure system and front, atmospheric conditions are expected to be extremely unstable in the Nansei Islands today, the 31st (Friday), and from western Japan to northern Japan until tomorrow 1st (Saturday).
Also, it is expected to develop rapidly. Due to the effects of a low pressure system, there will be heavy rain and severe storms in northern Japan tomorrow the 1st (Saturday), and the tide level will be high in some places in Hokkaido.

#Wind Forecast
Due to the rapidly developing low pressure system, extremely strong winds are expected to blow in northern Japan tomorrow 1st (Saturday).
Maximum instantaneous wind speed expected for tomorrow 1st (Sat)
Hokkaido 35m/s
Tohoku 40m/s



# Wave forecast
It will be a big wave in northern Japan tomorrow the 1st (Saturday), and it will be a barge in eastern Japan.
Estimated wave height for tomorrow 1st (Saturday)
Hokkaido 6m
Tohoku 7m with swells
Kanto-Koshin 5m with swells



#Rain Forecast
In eastern and northern Japan, there will be very heavy rain accompanied by thunder or heavy rain in some places until tomorrow 1st (Saturday).
Precipitation expected for 24 hours by the morning of tomorrow 1st (Saturday) (in areas with the most)
Tohoku 120mm
Kanto-Koshin 150mm
24-hour precipitation expected by the morning of the 2nd (Sunday) the next day (in areas with the most)
Hokkaido 120mm
Tohoku 100mm





In northern Japan, please be careful of strong winds and high waves tomorrow the 1st (Saturday), in Hokkaido, please be careful of flooding of low-lying land due to storm surge, and in eastern Japan, be careful of high waves.
In eastern and northern Japan, please be careful of landslides, flooding of low-lying areas, and rising river waters through tomorrow 1st (Saturday), and be aware of strong gusts of wind such as lightning and tornadoes nationwide.

[1-month forecast] High temperature trend continues nationwide; fewer sunny days expected on the Pacific side of eastern and western Japan

2025/10/30 22:30

Today, the 30th (Thursday), the Japan Meteorological Agency announced a one-month forecast for the period from November 1st to November 30th. Temperatures are expected to be quite high in Okinawa and Amami during the first half of the
period, and
eastern Japan and the Pacific side of western Japan are expected to have fewer sunny days.

[Forecast Points]
#Temperatures over the next month will be high in eastern and western Japan,
Okinawa and Amami, and will be at or above normal in northern Japan, as they will likely be covered by warm air.
In Okinawa/Amami, prices are expected to be quite high in the first half of the period.

#As there are periods when the weather is susceptible to low pressure, fronts, and humid air,
precipitation over the next month will be high on the Pacific side of Japan in the north, east, and west, and will be at or above normal on the Japan Sea side of Japan and Okinawa/Amami in the north, east, and west
.
Also, the amount of sunshine over the next month will be low on the Pacific side of eastern Japan,
on the Pacific side of western Japan and Okinawa/Amami.



[Weather for the next month]
#On the Sea of Japan side of northern Japan, there will be many cloudy, rainy, or snowy days as in normal years.
#On the Pacific side of northern Japan, there will be many sunny days, similar to normal years.
#The Sea of Japan side of eastern and western Japan will have many cloudy and rainy days, similar to normal years.
#The Pacific side of eastern Japan will have fewer sunny days than normal.
#On the Pacific side of western Japan, the weather changes every few days, but there will be fewer sunny days compared to normal years.
#Okinawa/Amami will have more cloudy and rainy days than normal.

[Low pressure is rapidly developing] Tomorrow's Halloween ~ November will start with stormy weather, warning heavy rain, and strong winds. What will the weather be like for the 3-day weekend

2025/10/30 11:55

Today, October 30th (Thursday), the area around Honshu is covered by a mobile high pressure system, and many places are experiencing mild autumn weather.

During the day, it will be pleasant and sunny at around 22c in western and eastern Japan, and
the temperature will rise to around 15c in northern Japan, which is typical for this time of year.



However, the high pressure system is moving away quickly, and a low pressure system accompanied by a
front is expected to move eastward along the southern coast of Honshu tomorrow, the 31st (Friday), and rapidly develop near northern Japan the following day until Saturday, November 1st.

The predicted central pressure of the low pressure system is
tomorrow (Friday) night at 1006hPa, but on the 1st the next day (Saturday) it will drop to 974hPa,
the pressure will drop by 32hPa in 24 hours.

On Saturday, November 1st, a rapidly developing low-pressure system will approach
There will be heavy rain mainly in northern Japan.



Rain is forecast at 5pm tomorrow, Friday the 31st.

Heavy rain and thunderstorms are expected to occur in some places on the Pacific side of western and eastern Japan, which are closer to low pressure systems and fronts.

Heavy rain is expected to fall in Shikoku as early as the morning of Friday the 31st,
in the Kinki region from before noon, in the Tokai region from the evening,
in the Kanto region starting at night, and there is a risk of
warning-level heavy rain.

I'm sure many people will be dressing up and going out tomorrow for Halloween, but you need to be careful and be on guard against heavy rain.



Looking at the rain and wind forecast for noon on November 1st (Saturday),
the wind is expected to be very strong mainly in northern Japan due to the rapidly developing low pressure system.

Also, the rain is getting heavier, and the start of November is likely to be very stormy in northern Japan.

The first day of the 3-day holiday coincides with heavy rain, which may affect
transportation.

Be sure to check the latest weather and traffic information before heading out.



This shows the possibility of
heavy rain warning announced as of 11:00 a.m. today, Thursday, the 30th.

There is a [moderate] possibility of heavy rain warning for the Nansei Islands, Shikoku, Tokai, and Kanto regions tomorrow, the 31st (Friday).

In addition, on the 1st (Saturday), the area will expand to the north
There is a [medium] possibility of a heavy rain warning in a wide area on the Pacific side of Kanto, Hokuriku, Tohoku and Hokkaido.

Although it is late autumn and the frequency of heavy rain is decreasing,
we must be on guard against landslides caused by unseasonable heavy rain.



Finally, the weekly weather.

Northern Japan and Hokuriku will continue to have cloudy and rainy weather during the three-day weekend.

Western from the Kanto region, crisp, crisp autumn weather is expected to spread from November 2nd (Sunday), the latter half of the long weekend, to November 4th (Tuesday), the end of the long holiday.

On sunny mornings, the temperature drops and it gets cold.
Please be aware of the temperature difference between morning and evening and daytime.

From November 5th (Wednesday) to November 6th (Thursday), it will rain mainly in western and eastern Japan.