Today's weather on the 14th (Sunday): The rainy season front moves northward. Even though there will be some sunshine in the morning, the weather will be downhill in eastern and western Japan.

2026/06/14 07:53

Today, the 14th (Sunday), the area around Honshu will be gently covered by high pressure, and although there will be sunny spells in many places, the weather is likely to gradually turn downhill. In Hokkaido, clouds tend to spread due to the effect of a trough in atmospheric pressure, and in eastern and western Japan, as the seasonal rain front moves northward, clouds will gradually increase, especially on the Pacific side. There are also likely to be some areas of inland areas such as Kanto-Koshin where there will be showers.



There is a high pressure system in the far east of Japan, which gently covers the area around Honshu.
Meanwhile, there is a low pressure system near Primorye, which is moving eastward. Additionally, the seasonal rain front extends to the south of Japan and passes near the Nansei Islands.





The Hokkaido region is expected to experience a trough of atmospheric pressure due to the influence of a low pressure system passing near Sakhalin, and clouds are expected to spread easily. In addition, the influence of cold air in the upper atmosphere will remain, and there will be places with heavy rain accompanied by thunder in the afternoon. Even if it's not raining when you go out, having a foldable umbrella will give you peace of mind. Pay attention to changes in the sky.

From Tohoku to Kinki and the Chugoku region, there will be many sunny days. However, as the rainy season front moves northward, the weather is expected to turn downhill from the west, mainly on the Pacific side, in the afternoon. It's a good idea to bring a foldable umbrella with you when you go out. There will also be some areas of rain in the inland areas of Kanto and Koshin. Please be careful of sudden thunderstorms.

The rainy season will return to Shikoku and southern Kyushu. It looks like the umbrella will come into play again.

It will be a rainy day in Okinawa due to the rainy season front.
In the Okinawa main island region and the Sakishima Islands, there is a risk of warning-level heavy rain until tomorrow, the 15th (Monday), depending on the degree of rain cloud development. Please be careful of landslides, flooding of low-lying areas, and rising river waters. Also, be careful of strong wind gusts such as lightning strikes and tornadoes. If there are signs that a cumulonimbus cloud is approaching, please take precautions such as moving inside a building.

Maximum temperatures will be around average or higher than average in many places. In many places in northern and eastern Japan, temperatures are expected to be similar to July. Please take measures to prevent heatstroke, such as drinking plenty of water.
In Kagoshima and Okinawa, where there is little sunlight, the temperature will be at or below normal and feel cooler. It looks like there will be midsummer days in some places next week, so please be careful about the temperature difference.

Typhoon eggs are expected to move north next week; sluggish weather continues

2026/06/13 23:12

Tomorrow, the 14th (Sunday), there will be some sunny spells around Honshu, but as the rainy season front moves northward and approaches Honshu, the weather will gradually turn downward from the west. Rain clouds are expected to cover the Okinawa and Kyushu regions around noon, and the rain is expected to spread to eastern Japan in the evening.
Even if it's sunny in the morning, please bring a folding umbrella with you when you go out.

The front will remain stationary near Honshu,
It looks like it will be a slow, rainy week with lots of cloudy weather and rain.



What is of concern is a low-pressure area off the coast far south of Japan.
In the future, there is a possibility that it will develop into a tropical cyclone, which is the egg of a typhoon, and move north toward Japan.



When a typhoon approaches an area where the front is stationary, warm, moist air from the
typhoon may flow over the front, causing
warning-level heavy rain.
If you are planning to go out next weekend, please pay particular attention to the upcoming weather forecast.

Atmospheric instability from northern to eastern Japan - be careful of sudden thunderstorms

2026/06/13 11:17

Today, the 13th (Saturday), strong cold air is flowing into the skies over Japan, which is unusual for this time of year, and the atmospheric conditions are unstable, especially in northern Japan. In the afternoon, even in sunny places, including eastern Japan, you need to be careful of sudden changes in the weather.



As of 11:00, rain clouds have developed locally in northern Japan, with moderately heavy rain of 19.5 mm/h observed in Ishizaki, Hiyama region, Hokkaido, and 14.0 mm/h in Owani, Aomori Prefecture.



Atmospheric instability will continue into the afternoon due to cold air in the upper atmosphere. In addition, due to the effects of rising temperatures during the day and humid air, rain clouds are expected to develop locally, mainly in the inland areas and mountains of northern and eastern Japan.
Even in sunny places, the weather can change suddenly and there is a risk of heavy rain or thunderstorms, and the situation can change in a short period of time. Please be careful of flooding in low-lying areas and rising water levels in rivers, and move to a safe indoor location when heavy rain clouds approach.
There is a possibility of showers in the afternoon even in the Kanto and other urban areas, so it would be a good idea to bring a foldable umbrella when going out.

The rainy season front has stalled in Okinawa, and there is a risk of warning-level heavy rain until around the 15th (Monday).

2026/06/12 19:02

In the Okinawa region, the rainy season front is stationary and it is raining in some places. Warm and humid air is flowing towards the front, making the atmospheric conditions extremely unstable.



From now on until around the 15th (Monday), rain clouds will develop locally and there will be heavy rain accompanied by thunder.



Depending on the degree of rain cloud development, there is a risk of warning-level heavy rain. Please be careful of landslides, flooding of low-lying areas, and rising river waters.
Also, be careful of gusts of wind such as lightning and tornadoes under developed cumulonimbus clouds. Pay attention to changes in the sky, and if there are signs that a cumulonimbus cloud is approaching, such as dark clouds approaching or the sound of thunder, please try to stay safe by moving inside a building.

Please pay attention to disaster prevention weather information that will be announced in the future.
In addition to evacuation information announced by local governments, please check the alert level such as advisories and warnings from the Japan Meteorological Agency website in advance, and check Kikikuru to see if the risk level is increasing in your area.

[Rain Forecast]
The expected rainfall per hour on tomorrow 13th is high in some places:
Miyakojima region 30mm
Yaeyama region 30mm

Today 12th 18th Precipitation expected for the next 24 hours from 18:00 to 18:00 tomorrow, the 13th, is expected to be 80 mm in the Miyakojima region.2 The predicted 24-hour precipitation from 18:00 on the 14th to 18:00 on the 15th is as follows:
Miyakojima region 80mm
Yaeyama region 80mm
Heavy rain is expected to occur in some places in the Sakishima Islands tomorrow, the 13th (Saturday). In the Sakishima Islands, there is a risk of warning-level heavy rain from tomorrow the 13th (Saturday) to the 15th (Monday) depending on the degree of rain cloud development. Please be careful of landslides, flooding of low-lying areas, and rising river waters.
In the Yaeyama region, please be careful of thunderstorms, tornadoes, and other strong gusts through tomorrow, Saturday the 13th.
Okinawa Main Island, Miyakojima, and Daitojima regions also need to be careful of lightning and gusty winds under cumulonimbus clouds that have developed into tomorrow, the 13th (Saturday).

Weather for tomorrow 13th (Saturday) Good weather for going out during the rainy season

2026/06/12 18:16

Tomorrow, the area around Japan will be covered in high pressure, but the seasonal rain front is expected to move northward to near Okinawa. We will continue to be affected by cold air moving into the sky.




Sunshine will reach Tohoku from Kyushu during the day, and it looks like it will be a good day to go out. Temperatures from Kyushu to southern Tohoku are expected to rise to around 30c during the day. When engaging in outdoor activities, please be careful of heat stroke by drinking plenty of water. However, there is a risk of sudden changes in the weather tomorrow, especially in the inland areas of northern and eastern Japan. It's safe to have an umbrella when you go out. It will rain intermittently in Okinawa and Amami due to the rainy season front.




After the beginning of the week, the rainy season front will move north and a low pressure system will approach, so it looks like the rainy season will continue again. Take advantage of the precious sunshine this weekend.

[Thunderstorms occurring in the metropolitan area] Be careful of extremely heavy rain and thunderstorms (commentary: weather forecaster Atsuko Miyake)

2026/06/12 14:51

The atmospheric conditions in the Kanto region are extremely unstable today.
Even if it's sunny now, you need to be careful about sudden changes in the weather.



First, let's take a look at the state of the rain clouds as of 2:00 p.m.
Rain clouds are developing in some places in the Kanto region.

In addition, extremely heavy rain of 50mm per hour has been observed in Fuchu City, Tokyo.
After this, rain clouds and thunderclouds are likely to develop further.



Let's take a look at the lightning probability.

The probability of lightning strikes is high in the Kanto region, especially in the northern part of the country.
In Maebashi and Utsunomiya, the purple color indicates a high probability of over 80%.

As cold air flows into the upper atmosphere, the probability of lightning strikes will continue into the night.
In particular, the Kanto region is likely to continue to be prone to thunderstorms until around 9 p.m.

Also, the rain seems to be getting stronger.



Rain is forecast.
Even in areas where the rain has strengthened,
there will be red indicators even into the evening, and there is a risk of heavy rain and thunderstorms.

If it rains all at once in urban areas, there is a risk that roads will be flooded.
It rains so much that the roads become like rivers.

Although most of the rain clouds are expected to disappear by 9:00 p.m.
Even after this, you will need to be careful about how the rain will fall.



If you hear thunder, try to go inside a sturdy building.
Please wait at least 30 minutes until you can no longer hear the thunder.

And rainwater collects in low places.
If you are in an underpass or underground facility, rainwater will flow into your home.
Try to get in as high as possible.

Also, be sure to check the radar for the latest information on when the rain clouds will leave.

The unstable atmosphere will continue tomorrow (Sat).
In the Kanto region, there is a high probability of lightning occurring mainly in the northern part of the country into the evening.
Please be careful of sudden strong rain and lightning tomorrow (Saturday) as well.



Let's look at the weather on Saturday and Sunday.
The Kanto region will be marked as sunny on both Saturday and Sunday.
The atmospheric condition will still be unstable until tomorrow (Saturday), so please think that the rain symbol is hidden behind this sunny symbol.
Please bring rain gear when you go out tomorrow (Sat).
On Sunday, the atmospheric conditions will gradually become more stable.
I think you don't need rain gear on Sunday.

However, it looks like the heat will continue. Please take precautions against the heat on both Saturday and Sunday.



Weekly forecast. On the 15th (Monday), there will be rain marks across the Kanto region.
Depending on the movement of low pressure and fronts, the rain may become heavier, so please pay attention to the latest information.


And on Friday the 19th. The rainy season front is finally moving north to Honshu. From now on, it looks like the rainy season will gradually continue.

[Thunderstorms occurring in the Kanto region] Be careful of sudden changes in the weather tomorrow (Saturday) in eastern and northern Japan (commentary: weather forecaster Atsuko Miyake)

2026/06/12 14:16

Atmospheric conditions are extremely unstable today, mainly in eastern and northern Japan.
Atmospheric instability will continue into tomorrow (Sat).
Please be careful of sudden changes in the weather even if it is sunny.



Now, let's take a look at the rain clouds and thunder during the 2pm live broadcast.

At this time, rain clouds are developing in various places from Kanto, Tokai, Tohoku and Hokkaido.
The yellow area is the area accompanied by lightning.
There are some places where the rain is increasing, accompanied by thunder.



It seems that the high probability of lightning strikes (probability of lightning occurring) will continue.

Even after 3 p.m., there are red and purple signs from Kanto-Koshin to Hokuriku, Tohoku, and Hokkaido. The
probability continues to be quite high at over 80%.
Cold air is flowing into the sky, and
will continue to have a fairly high probability of thunderstorms in the Kanto region into the early hours of the night.



Rain cloud forecast.

There is a risk of locally heavy rain and thunderstorms from Kanto-Koshin to Hokkaido.
Also, rain clouds are likely to develop along the mountains of the Kinki and Chugoku regions.

Especially in Tokyo and other metropolitan areas, if heavy rain or thunderstorms begin after this, the rain will likely turn the roads into rivers.
In urban areas, please be careful of flooding in low-lying areas and roads.

There is a risk of heavy rain and thunderstorms from Kanto to Hokkaido into the evening.
In addition, there are places in the Kanto region where it rains heavily even into the early hours of the night, so please be careful about how it rains.



When the sky looks like this, it's a sign of a sudden change in the weather.

If you see black clouds approaching, hear the sound of thunder, or suddenly feel cold wind blowing, this is a sign that a cumulonimbus cloud has developed near
.

If you see these signs,
there is a risk of sudden heavy rain, strong rain, lightning, tornadoes, severe gusts of wind, hail, etc.
Please move to a sturdy building.




There is also a possibility of heavy rain and thunderstorms tomorrow (Sat).
The probability of lightning strikes increases especially in the afternoon when the temperature rises.
Please be careful of sudden changes in the weather tomorrow.



Let's take a look at the detailed weather for Saturday and Sunday in various places.
The sunny mark is noticeable near Honshu.
However, don't be fooled by this sunny mark from Kanto to Hokkaido.
There is a rain mark hidden behind the sunny mark.
If you're going out tomorrow, it's safe to bring rain gear.

And in Okinawa, the rainy season continues on both Saturday and Sunday.
Please be aware that there is a risk of heavy rain, especially on Sunday, which could lead to warning-level heavy rain.

In western Japan, the temperature is rising, and it looks like there will be midsummer days in some places.
Here you need to take measures against the heat.



Weekly forecast.
The Tokyo rain mark is on the 15th (Monday), but this may change to a rain mark in other areas depending on the movement of fronts and low pressure systems.
Please pay attention to the latest information.

Then, around the 18th (Thursday) and 19th (Friday), the rainy season front will move northward near Honshu.

The rainy season is finally in full swing around Honshu.
On the other hand, in Okinawa, the rain symbols are disappearing around the 18th (Thursday) and 19th (Friday).
It's almost time to see the end of the rainy season.

Thunderclouds are developing in Tokyo!! Level 3 heavy rain warning has been announced, expected to slowly move eastward

2026/06/12 14:09

As of 1:20 p.m. today, Friday the 12th, thunderclouds are developing around Tokyo.



Today, the 12th (Friday), a strong cold air is flowing over the Kanto region for this time of year.
Also, due to rising daytime temperatures and humid air, the atmospheric conditions are extremely unstable.

As of 1:20 p.m., thunderclouds that formed in the Tama region of Tokyo are slowly moving east toward the 23rd ward.
A Level 3 heavy rain warning has been announced for Akishima City and Tachikawa City in Tokyo.
From now on, the developed rain clouds will move eastward, and there is a risk of heavy rain falling in urban areas such as the 23rd ward.If the developed rain clouds continue to form, a level 3 heavy rain warning, level 3 landslide warning or higher may be announced.






[Times when you need to be careful about heavy rain]
Today, Friday, the 12th, from 1:00 pm until late at night

[Rainfall forecast (southern Kanto, areas with heavy amounts)]
+1-hour rainfall: 40mm
+24-hour rainfall: 80mm

Please be careful of flooding in low-lying areas and rising water in rivers.
Also, please be careful of falling trees due to lightning or gusts of wind.

Strong cold air in the sky, fear of guerrilla thunderstorms mainly in northern and eastern Japan. Be careful of sudden weather changes in the afternoon.

2026/06/12 07:20

Today, the 12th (Friday), a strong cold air for this time of year is flowing into the air around 5,500m above Honshu, with temperatures below -15c.

In northern and eastern Japan, atmospheric conditions are extremely unstable due to the effects of cold air in the upper atmosphere, humid air, and rising temperatures during the day. Thunderclouds are more likely to develop in the afternoon, when daytime temperatures peak, so you need to be careful about sudden changes in the weather.



Looking at the probability of a lightning strike, it is predicted that areas with a high probability of lightning will spread across a wide range of northern and eastern Japan, with some places near Hokkaido and Kanto where the probability of a lightning strike is over 90%. From around noon, there will be thunderstorms mainly inland and along the mountains of eastern Japan, and there will be localized areas with heavy rain. From the evening until early evening, there is a possibility of heavy rain accompanied by localized thunderstorms even in the plains, and sudden changes in the weather may coincide with the time you return home.

If you see dark clouds approaching, hear the sound of thunder, or suddenly feel cold wind blowing, there is a high possibility that violent phenomena such as sudden heavy rain or lightning will occur. Please pay attention to changes in the sky, and if there are signs that rain clouds are approaching, please take precautions such as moving to a sturdy building. In addition, there is a risk of strong winds such as tornadoes and hail, so please be careful when managing your crops.
Also, be careful of landslides caused by heavy rain, flooding of low-lying areas, and rising river waters.

Latest 1-month forecast: Rainy season front activity is increasing near Honshu. Be careful of heavy rain and heatstroke during the rainy season.

2026/06/11 23:14

On the 11th (Thursday), the Japan Meteorological Agency announced the latest monthly weather forecast for the next month.



From now on, the area around Honshu will be susceptible to the influence of moist air circulating around the front and the edge of the high pressure system. The seasonal rain front is expected to remain stationary near Honshu, and frontal activity is expected to increase.
The area around 1500m above Honshu will likely be covered with warmer air than normal.



The rainy season front is expected to gradually move north toward Honshu and enter a period of stagnation. Precipitation over the next month is expected to be higher than normal, mainly in eastern Japan such as Kanto-Koshin, Hokuriku, and Tokai. In western Japan, the number of cases will be at or above normal. Be sure to prepare for heavy rain.
In Okinawa/Amami, the end of the rainy season may be announced at the same time as the front moves northward. After the end of the rainy season, Okinawa and Amami are expected to continue to have sunny days.
Northern Japan, Okinawa, and Amami will experience average precipitation.

The average temperature for the next month will be higher than normal across the country. In mid-June, the temperature will be higher than normal in northern Japan, and from late June to early July, it will be higher than normal in eastern and western Japan, and the humidity will increase. Temperatures in Okinawa and Amami are higher than normal mainly during the latter half of the period, and the heat is likely to become even more severe after the end of the rainy season is announced.
Don't forget to take daily measures to prevent heatstroke, such as staying hydrated frequently and taking adequate breaks.