Today's 24th (Friday) weather: Heavy rain warning for southern Tohoku and Niigata

2026/07/24 07:05

The rainy season front is expected to move southward from the continent, through the Sea of Japan, and into the Kanto region. It is expected that the area from the Tokai Sea to the west will continue to be covered in high pressure.



The activity of the rainy season front will increase, and it will rain intermittently in southern Tohoku and Niigata. Please be careful as there is a risk of heavy rain locally. In northern Japan, there is less sunlight, so the temperature is less likely to rise, and there are many places that do not reach 30 degrees Celsius during the day.
As the rainy season front moves southward in the Kanto region, the weather is likely to gradually go downhill. In areas along the mountains, rain will begin as early as noon. Don't forget your umbrella as there will be widespread rain in the afternoon. The intense heat will subside a little as there will be less sunlight, but it will still feel hot and humid with temperatures exceeding 30 degrees Celsius and high humidity.
From the Tokai to the west, the temperature will be high and the sun will shine brightly in the morning, so it is likely to be dangerously hot. It will be as hot as yesterday, so please be extremely careful about heat stroke.



Today, July 24th, is Telework Day. Telework Day is a campaign carried out as part of work style reform, with July 24, the opening ceremony of the Tokyo Olympics and Paralympics, designated as "Telework Day." This campaign aims to alleviate traffic congestion, and the government and related organizations are working together to call for simultaneous implementation of telework.
We expect heavy rain in the southern Tohoku region and Kanto region, and heat that makes it dangerous to go outside from the Tokai region to the west, so we recommend teleworking from a weather perspective.

[Ocean Summary] Large ship erupts in the East China Sea due to Typhoon No. 9 (July 12-18, 2026)

2026/07/24 05:30

A large and strong typhoon No. 9 made landfall in central China. As a result of this, waves in the East China Sea reached a height of 6 meters and remained high until the 14th.
Below is a summary of the ocean (July 12-18, 2026)



#Barometric pressure distribution and waves
On the 12th, a large and strong typhoon No. 9 made landfall in China. As a result of this, waves in the East China Sea reached a height of 6m, and the waves remained high until the 14th, and high waves continued across the Pacific Ocean until the 13th. On the 13th, there was a trough in the atmospheric pressure near Hokkaido, with a low pressure system forming in the west of Hokkaido, and waves reaching 4 meters in height in the east of Hokkaido. On the 14th, a low pressure system became stationary to the east of Japan. There was a large pressure gradient between the area and the Aleutian high, and waves rose to the east of Hokkaido. On the 15th, a low pressure system moved northward over the Sea of Japan. Waves increased around the low pressure area. From the 17th to the 18th, the area was gently covered by high pressure, and the surrounding waters remained calm.



#Sea surface temperature
Sea surface temperatures in the Japanese waters are expanding in areas where they are higher than normal. Temperatures were significantly higher than normal mainly in the north, reaching a maximum of 4 C above normal. To the southeast of Hokkaido, areas of sea area where sea surface temperatures are significantly higher than normal have expanded. In the East China Sea and the waters around the Nansei Islands, waters lower than normal can now be seen. Sea areas slightly lower than normal continued off the coast of the southeastern Kanto region, and waters significantly higher than normal off the southeastern coast of Hokkaido shrank. In the waters near the Chishima Islands, the area of higher than normal waters expanded, and the Sea of Okhotsk remained slightly higher than normal.

[Typhoon information] Typhoon No. 12 occurs in the east of the Philippines

2026/07/24 05:17

At 3:00 on the 24th, a tropical cyclone became Typhoon No. 12 in the east of the Philippines.

As of 3:00 on the 24th
Center location: 17 55'N latitude, 125 05'E
Central pressure: 998hPa
Maximum wind speed near the center: 18m/s
Maximum instantaneous wind speed: 25m/s
Strong wind area of 15m/s or more: Entire area 330 km

Typhoon No. 12 is moving westward at a speed of approximately 35 kilometers per hour, accompanied by strong winds.



It is expected to reach the South China Sea at 3:00 on the 25th tomorrow, change course to the west-northwest, and land on the continent on the 26th.

As the typhoon approaches, people in the Nansei Islands need to be careful about the wind and waves.
Please pay attention to future information.

[Breaking News] A tropical cyclone has formed in the east of the Philippines. It is expected to develop into typhoon No. 12 on the night of the 24th.

2026/07/23 19:44

According to the Japan Meteorological Agency's announcement at 19:10, a new tropical cyclone has formed.

The tropical cyclone is moving west-northwest east of the Philippines.

Central location: 17 25'N, 127 50'E
Central pressure: 1000hPa
Maximum wind speed near the center: 15m/s
Maximum instantaneous wind speed: 23m/s

This tropical cyclone is expected to continue moving west-northwest and develop into a typhoon on the night of the
24th.
If it becomes a typhoon, it will be called Typhoon No.12.



After that, it will proceed to the South China Sea and is expected to make landfall in South China on the 26th.

Even if the typhoon itself is far away, the rain can suddenly intensify due to the influence of humid air, and the outside situation can change drastically
in a short period of time.

Please pay attention to the latest typhoon information.

[This year's record high of 40.9 degrees Celsius in Japan] Three consecutive days of extreme heat, but atmospheric instability "Beware of disaster-level heat and thunderstorms" (Commentary: Weather forecaster Atsuko Miyake)

2026/07/23 14:34

Please be on guard for the extreme heat and thunderstorms today.



Looking at the highest temperature until 2:20 pm today, the 23rd (Thursday),
Sakuma, Tenryu Ward, Hamamatsu City, Shizuoka Prefecture, reached 40.9c,
the highest temperature recorded in Japan this year.

In addition, Tajimi City, Gifu Prefecture, has experienced extremely hot days today with temperatures exceeding 40c for three consecutive days,
with dangerous and disaster-level heat in many places.
Please be extremely careful about heat stroke.

How long will this dangerous heat last



Looking at the maximum temperature in the weekly forecast,
we are forecast to experience extremely hot days of 35c or higher every day.
The temperature does not drop not only during the day but also at night, and the heat remains unbearable.
It may be a good idea to sleep with the air conditioner on so you can get a good night's sleep.



And in Nagoya, the temperature is expected to be 39c again tomorrow and the day after.
The extreme heat here continues.
Please be careful of heat stroke.


On the other hand, in the area north of Kanto, the extremely hot weather seems to be coming to an end for now.
This is because relatively cool air tends to flow around the edge of the Okhotsk High.

However, there are days in the Kanto region where the temperature rises to around 33-34 degrees Celsius, so
the heat and humidity continues.
Please continue to be careful of heat stroke.



Please use the air conditioner instead of putting up with the heat.
Also, try to walk in the shade and avoid direct sunlight as much as possible.
Also, try to eat a well-balanced diet and build your body to withstand the heat.




And from now on, you will also need to be careful of thunderstorms.

Looking at the forecast weather map for tomorrow (Friday) night,
there will be a high pressure system to the south, followed by high pressure from the north.

Warm, humid air flows in from the high pressure system in the south.
Also, relatively cool and humid air flows in from the high pressure system in the north.

These two different atmospheres are expected to collide, creating a front over the Hokuriku and Kanto regions.

The atmospheric conditions near this front are likely to become unstable, leading to thunderstorms in some places.



Now, let's take a look at the rain cloud forecast.
After the evening, rain clouds will develop over Kanto, Tohoku, and parts of Shikoku and Kyushu.
Rain clouds are flowing not only along the mountains but also into the plains,
especially in the Kanto region, where there is a risk of extremely heavy rain and thunderstorms even in central Tokyo.
Please be careful of flooding in low-lying areas and roads.


When the date changes, the rain clouds will disappear.



However, tomorrow (Friday), clouds associated with the front will cover the Tohoku region.
There is a risk of heavy rain and thunderstorms, especially in the afternoon, especially in the Tohoku region.
There are some areas where heavy rain will reach the warning level, so please be careful and be on guard against landslides.

In the afternoon, rain clouds will begin to flow into the Kanto region again.
Very heavy rain, possible heavy rain again.
Please be careful and be on guard for the rain tomorrow.

There is a risk that rain will continue in similar areas in the Tohoku region into the following day and into Saturday.
Please be careful about the rain as well.



shows the weather in various places.
The region from the Tokai region to the west will continue to experience intense heat until tomorrow.
Please be careful and cautious about heat stroke.
In addition, in the Tohoku region, Kanto region, and Hokuriku region, there is a risk of rain and thunderstorms even in places without the
rain symbol. Please be aware of sudden changes in the weather.

There is also a risk of heavy to very heavy rain. Please be careful of lightning and gusts of wind.



Weekly forecast.
From now on, rain will continue in the Hokuriku and Tohoku regions, where the rainy season has not yet ended. The rainy season front is expected to remain stationary.
Please be careful of heavy rains at the end of the rainy season.

On the other hand, the heat continues in areas west of the Kanto region, where the rainy season has ended.
The intense heat continues, especially in the areas west of the Tokai Sea, so please be careful of heat stroke.

Today, the 23rd (Thursday), is the 24th solar term ``Great Heat.'' Be careful of dangerous heat and sudden changes in weather from the afternoon.

2026/07/23 06:55

Today, the 23rd (Thursday), is the ``Great Heat'' of the 24 solar terms. It is said to be the hottest time of the year.



The area around Honshu is covered by a midsummer high-pressure system mainly in western and eastern Japan, and today it will be covered in warm air and the strong sun will beat down, making it extremely hot. The predicted maximum daytime temperature is expected to be 40 degrees Celsius in Kofu, Gifu, Nagoya, and Kyoto, 38 degrees Celsius in Osaka, and 37 degrees Celsius in Tokyo, making it dangerously hot and approaching body temperature. The temperature will not drop much at night, and it will be a tropical night in many places.

It is best to be extremely careful about heat stroke, drink plenty of water and salt, take adequate breaks, and refrain from strenuous exercise outdoors. Please use the air conditioner to stay in a cool environment day and night.



The front is stationary near the Sea of Japan. As of this morning, active rain clouds are hanging over Niigata Prefecture, and there are areas in Niigata Prefecture where a level 4 heavy rain danger warning has been issued. There is a risk of very heavy rain in the morning, so please be careful of heavy rain disasters.



In the afternoon, atmospheric conditions will become unstable in places around Honshu due to rising daytime temperatures and moist air. After noon, rain clouds and thunderclouds are likely to develop inland and along the mountains, and sudden heavy rain and thunderstorms are likely to occur in some places.
The probability of lightning strikes is particularly high in the Kanto region, and the rain clouds that have developed will spread to the plains, and it is likely that there will be extremely heavy rain of over 50mm per hour in some places. Please be careful of flooding of low-lying land, flooding of roads, and rising water of rivers. In addition, there is a risk of lightning strikes, tornadoes, strong wind gusts, and hail, so please be careful.
Pay close attention to changes in the sky, and if you see signs of sudden changes in the weather, such as seeing black clouds approaching or hearing thunder, please take precautions such as evacuating to a sturdy building.

3-month forecast: The heat will be intense in August, but it won't last long; autumn will arrive a little later

2026/07/22 20:47

On the 21st (Tuesday), the Japan Meteorological Agency announced the latest three-month forecast, which shows the weather outlook for the next three months.



Due to the effects of global warming and the El Nino phenomenon, the temperature of the entire atmosphere, especially in the tropical regions, will be high.
Also, due to the continuing effects of the El Nino phenomenon, sea surface temperatures are expected to be higher in the eastern to central equatorial regions of the Pacific Ocean and lower in the western regions. Cumulonimbus clouds will most likely occur in the eastern and central parts of the tropical Pacific, and will be rare from India to the vicinity of Indonesia.

As a result of these effects, upper-level westerly winds are expected to flow more southerly than normal over the Eurasian continent, and are also likely to flow slightly southerly near Japan.
The Pacific high pressure system is expected to extend northward slightly less than normal from August onwards, and its extension south of Japan is also expected to weaken. The overhang of the Tibetan anticyclone in the sky toward the vicinity of Japan will cause its overhang to the north to become weaker than normal, and the overhang toward the Japan region will also weaken.



The average temperature in August is expected to be above normal in northern Japan, and above normal in eastern and western Japan. As the severe heat continues, strict vigilance is required to prevent heat stroke.
However, from September onwards, the overhang of the Pacific high pressure system will weaken, and in many places it is expected that conditions will return to normal levels. The intense heat won't last very long. Okinawa/Amami is expected to be at or above normal.
The average temperature in October will be around average or higher than average nationwide. Autumn arrives a little later, and in high altitude areas around northern Japan and Honshu, the pace of autumn leaves changing colors may be slower.



Precipitation throughout the country is expected to be near normal. However, you need to be careful about how the rain falls, as you will be more susceptible to the effects of localized heavy rain and thunderstorms, and an autumn rain front in the latter half of the season.
If the timing of the weakening of the Pacific anticyclone coincides with the timing of a typhoon, the typhoon may approach Japan and have an impact. Please pay attention to the latest typhoon information.

Kanto-Koshin inland forecast to be 40 degrees Celsius. Will it be a very hot day Atmospheric conditions will be very unstable in the afternoon. There is also a risk of warning-level heavy rain.

2026/07/22 12:47

#Extremely hot day in inland areas of Kanto-Koshin - Dangerous and life-threatening heat
Today, the 22nd (Wednesday), a tall high-pressure system covers western and northern Japan, with the high-pressure system south of Japan and the high-pressure system east of the Philippines overhanging the vicinity of Japan, and the sky is clear over a wide area.
Also, due to westerly winds around the edge of the high pressure system and northwesterly winds on the Pacific side, making it difficult for sea breeze to enter inland, some places are already experiencing extremely hot temperatures of over 35 degrees Celsius in the morning.
As of 11 a.m., there are places in the Kanto-Koshin region, mainly in the inland areas, that are experiencing extreme heat, and in Hatoyama in Saitama Prefecture and Isesaki in Gunma Prefecture, the temperature is 36.9 degrees Celsius, exceeding body temperature.



The temperature is expected to rise further in the afternoon, with some places in Yamanashi Prefecture, Saitama Prefecture, and the inland areas of the northern Kanto region expected to experience extremely hot days with maximum temperatures of over 40c.
The heat will be dangerous and life-threatening.
A heatstroke warning alert has been announced for the entire Kanto-Koshin region.
If the temperature rises significantly, there is a risk of damage to human health due to heatstroke.
Don't think of it as someone else's problem and protect yourself from the heat.
Indoors, please use air conditioners appropriately to stay in a cool environment, and also take frequent breaks and replenish water and salt.
Elderly people and children are more susceptible to heat stroke, so be especially careful, and make sure to watch over and talk to those around you.
Please stop exercising unless you are in a cool environment.

#Afternoon Atmospheric conditions are very unstable, with sudden heavy rain also occurring in the southern Kanto region
Today, the 22nd (Wednesday), a front has moved from the continent, passed through the Sea of Japan, and is stationary in northern Japan.
In the afternoon, the atmospheric conditions will be very unstable in the Kanto-Koshin region due to warm, humid air heading toward the front and rising temperatures during the day, and thunderclouds will develop in places.



Particularly from the evening to early night, heavy rain with thunderstorms of 30mm per hour will fall locally in northwestern and northeastern Chiba Prefecture, and localized extremely heavy rain of 50mm per hour will fall in Tochigi Prefecture, potentially leading to warning-level heavy rain.
In the Kanto-Koshin region, please be careful of flooding in low-lying areas and rising water in rivers from late afternoon until late at night.
Also, be careful of strong wind gusts such as landslides, lightning strikes and tornadoes.

Kanto-Koshin region: Be careful of sudden thunderstorms and gusts of wind

2026/07/22 12:06

Today, the 22nd (Wednesday), a front extends from the Korean Peninsula to northern Japan and is stationary.
As a result of this, rain clouds are currently covering Hokkaido and the Tohoku region.



Meanwhile, an anticyclone in the south of Japan covers a wide area from northern to western Japan,
causing clear skies and rising temperatures in many places.
As of 11:30, temperatures exceeding 35c have been observed in Tokyo.

Atmospheric conditions are expected to become extremely unstable in the afternoon due to rising temperatures on the ground.
Beware of lightning, gusty winds, hail, and localized heavy rain.



Particularly in the Kanto-Koshin region, there will be places where there will be heavy or very heavy rain accompanied by thunder from the afternoon of the 22nd to late at night. If the rain clouds develop more than expected, or if the rain clouds continue to grow, there is a possibility of heavy rain reaching warning level.

1-hour precipitation expected on the 22nd (high)
Northern Kanto region 50 mm
Southern Kanto region 40 mm
Koshin region 30 mm
24-hour precipitation expected from 6:00 on the 22nd to 6:00 on the 23rd (high Location)
Northern Kanto region 80mm
Southern Kanto region 60mm
Koshin region 60mm

In the Kanto-Koshin region,
please be careful of flooding in low-lying areas and rising river water from late afternoon to late evening.
Also, be careful of landslides, lightning strikes, and strong gusts of wind such as tornadoes.



If there are signs such as sudden darkness in the surroundings or cold wind blowing, it is a sign that
a developed cumulonimbus cloud is approaching. Please try to ensure safety by moving inside the building.
There is also a risk of hail, so please be careful when managing crops and agricultural facilities.

Summary of weather and temperature (7/12 to 7/18) After the rainy season, it is extremely hot in western Japan. Heavy rain is expected in some places in eastern and northern Japan due to humid air and the low pressure caused by former Typhoon No. 9.

2026/07/22 10:22

This is a summary of the weather and temperature from 7/12 to 7/18.



#Characteristics of pressure distribution
On the 12th, Typhoon No. 9 made landfall in China and moved northward. Western and eastern Japan were in an area of high pressure, but in northern Japan, moist air flowing around the edge of the high pressure system caused atmospheric conditions to become unstable. On the 13th, Typhoon No. 9 weakened as it moved northward through central China. Western Japan was in a high-pressure area, but eastern and northern Japan were in a low-pressure trough, and a low-pressure system formed off the coast of Sanriku and moved northward. On the 14th, Typhoon No. 9 moved northeast near the Yellow Sea, accompanied by a front. Western and eastern Japan were in a high-pressure zone, but northern Japan continued to experience a trough in atmospheric pressure. On the 15th, Typhoon No. 9 turned into an extratropical cyclone in the western Japan Sea and moved northward along the Japan Sea, accompanied by a front. The area from the Nansei Islands to western Japan was placed within the Pacific anticyclone. On the 16th, a front extending from a low pressure system different from Typhoon No. 9 passed near northern Japan. Western Japan is in an area of high pressure, but eastern and northern Japan are in a trough of weak atmospheric pressure. On the 17th, a front extended from central China to the vicinity of the Korean Peninsula, and the area around Japan became a trough of weak atmospheric pressure. On the 18th, a low pressure system formed above the front extending near the Korean Peninsula and moved eastward.

#Precipitation
On the 12th, there were record-breaking heavy rains in some places in Hokkaido due to the influence of moist air circulating around the edge of a high-pressure system.In the vicinity of Rikubetsu Town in Hokkaido, extremely heavy rain of 71mm per hour was observed, making it the heaviest rain in recorded history. On the 13th, the atmospheric conditions were unstable in various places due to the influence of humid air, and heavy rain was observed in various places in the southern Tohoku region. Humid air continued to flow into northern Japan on the 14th, causing unstable atmospheric conditions. Extremely heavy rain of 51.5 mm per hour occurred in Engaru Town, Hokkaido, the highest amount of rainfall in recorded history. On the 15th, a low-pressure system different from Typhoon No. 9 approached northern Japan, causing heavy rain mainly in Akita Prefecture, with 39 mm of rainfall recorded in one hour in Happo Town, Akita Prefecture. On the 16th, atmospheric conditions were unstable mainly in eastern Japan due to lower-level warm, humid currents and sunlight. In Konosu City, Saitama Prefecture, extremely heavy rain of 50mm per hour was observed. On the 17th, thunderstorms occurred mainly in the Kanto region due to the damp air. Extremely heavy rain of 72.5 mm in 1 hour in Kiryu City, Gunma Prefecture. On the 18th, there was heavy rain in Gunma and Tochigi prefectures from the night of the 17th until dawn. Ashikaga City recorded 237.5mm of daily precipitation, the highest in July.

#Temperature
On the 12th, temperatures rose mainly in western Japan, which was covered by the Pacific anticyclone. Due to the combination of warm air in the sky and strong sunlight during the day, dangerously hot temperatures were observed in Kyushu and the Sanin area, with temperatures reaching 38.3 degrees Celsius in Hita City, Oita Prefecture. On the 13th, the weather remained sunny and extremely hot, mainly in western Japan, with a temperature of 38.4 C observed in Nakamura, Shimanto City, Kochi Prefecture. In addition, Miyazaki City, Takamatsu City, Tokushima City, and Okayama City experienced their first extremely hot day of the year. On the 14th, warm air with a temperature of 21 C at 850 hPa flowed into western and eastern Japan, and the temperature rose to 38.3 C in Tenryu Ward, Hamamatsu City, Shizuoka Prefecture. On the 15th, warm air moved north to the southern Tohoku region. In Minami-Shinano, Iida City, Nagano Prefecture, more than 150 locations had extremely hot days with temperatures of 38.1 degrees Celsius. Warm air continued to flow in on the 16th, with temperatures reaching 38.6 C in Kuwana City, Mie Prefecture. The severe heat continued on the 17th, mainly in western Japan, with a temperature of 38.0c observed in Kyoto City. On the 18th, temperatures rose mainly on the Sea of Japan side where there was sunshine and wind blowing, with temperatures reaching 37.9 C in Sakai City, Fukui Prefecture and 37.8 C in Fukuchiyama City, Kyoto Prefecture, with severe heat continuing mainly in western Japan.



# Weather summary for this period (July 12th to July 18th)
The average temperature was in many places covered by high pressure, mainly in western Japan. In addition, warm air with a temperature of 18 to 21 degrees Celsius at 850 hPa flowed into the skies above Honshu, causing temperatures to rise and become higher or significantly higher than normal nationwide.
The rainy season has ended in western Japan, where sunny weather continues, and in many places the precipitation was much lower than normal, with some places receiving 0 mm of precipitation. In eastern and northern Japan, many places experienced near-normal or above-normal weather conditions due to the influence of humid air, fronts, and low-pressure systems.
As for the number of hours of sunshine, the rainy season has ended in western Japan, where sunny weather continues, and the number of hours of sunshine has increased in some places to a greater extent than in normal years. In many places in eastern and northern Japan, sunshine hours were at or below normal due to the influence of humid air and the rainy season front.