[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.

Summary of weather and temperature (May 31st to June 6th) Typhoon No. 6 makes landfall in Wakayama Precipitation is 400% of normal in some places from the Nansei Islands to the Kanto region

2026/06/11 17:59

This is a summary of the weather and temperature from May 31st to June 6th, 2026.


[About this period's weather]
#Characteristics of atmospheric pressure distribution
On the 31st, Typhoon No. 6 moved north over the sea south of Okinawa, and the rainy season front stalled over the sea south of Honshu. On the 1st, Typhoon No. 6 moved north near the main island of Okinawa, and over the 2nd, it gradually changed course to the east and approached southern Kyushu. Over the next 3 days, it moved east along the southern coast of Honshu, making landfall in Wakayama Prefecture in the early morning, then continued eastward, passing near the Izu Islands in the afternoon, and by night it turned into an extratropical cyclone over the sea east of Japan. On the 4th, the Baiu front remained stationary over the sea south of Japan, and a low pressure system formed over the front in the East China Sea, moving eastward through the East China Sea. On the 5th, a rainy season front extended over the southern seas of Japan, and a low-pressure system above the front moved eastward along the southern coast of Honshu. Additionally, a tropical cyclone moved northeast near Taiwan. On the other hand, the Sea of Okhotsk high pressure system extended from northern Japan to eastern Japan. On the 6th, the tropical cyclone turned into an extratropical cyclone near the Nansei Islands and moved northeast through the Nansei Islands, accompanied by a front. The Sea of Okhotsk anticyclone continued to protrude from northern Japan to eastern Japan.

#Precipitation
On the 31st, due to the influence of the seasonal rain front extending around the Nansei Islands, rain fell in Okinawa/Amami, Kyushu, Shikoku, and the Pacific side of western Japan due to the typhoon's northern front. On the 1st, Typhoon No. 6 and its northern front brought rain to the Nansei Islands, Kyushu, Chugoku, Shikoku, and the Kinki region. There was heavy rain in the Nansei Islands, and in Kunigami Village, Okinawa Prefecture, the daily precipitation was 225.5 mm, breaking the highest value for June. On the 2nd, heavy rain fell from the Nansei Islands to the Pacific side of western Japan due to the influence of rain clouds from Typhoon No. 6 and moist air heading toward the front. On the 3rd, Typhoon No. 6 brought heavy rain to a wide area from Tohoku to Shikoku, and in Inatori in Higashiizu Town, Shizuoka Prefecture, the daily precipitation was 255.5 mm, breaking the highest value for June. On the 4th, the front stalled, and the low pressure system above it moved west of Kyushu, causing rain in the Nansei Islands and Kyushu. On the 5th, a low-pressure front moved south from Kyushu to Shikoku, causing rain mainly in southern Kyushu. On the 6th, warm and humid water flowed toward the tropical cyclone and the seasonal rain front, and rain clouds developed over the Nansei Islands. On Kikaijima Island in Kagoshima Prefecture, the daily precipitation was 169mm, breaking the record for June.

#Temperature
On the 31st, the sky was covered with warm air, and the area around Honshu was loosely covered by high pressure, causing clear skies and rising temperatures across the country. In Hita City, Oita Prefecture, the temperature was 34.8 degrees Celsius, just one step away from an extremely hot day. On the 1st, temperatures rose in sunny areas in northern and western Japan, with some areas in the inland Kanto region experiencing extremely hot weather, including 36.0 degrees Celsius in Kiryu City, Gunma Prefecture. On the 2nd, temperatures rose in Hokkaido as warm air flowed into the sky, making it a midsummer day in a wide area, including 32.7 degrees Celsius in Obihiro City. On the 3rd, there were places in the Tohoku and Kanto regions where it rained due to the typhoon, with temperatures dropping below 20 degrees Celsius. In western Japan, where the weather has improved, there are many places with temperatures above 30 degrees Celsius. On the 4th, on the Pacific side of northern and eastern Japan, a humid northeast wind blew, clouds spread, and the temperature did not rise. On the other hand, temperatures rose on the Sea of Japan side of northern Japan and Hokuriku due to the Foehn. On the 5th and 6th, temperatures on the Pacific side of the Kanto and Tohoku regions were lower than normal due to northeasterly winds from the Okhotsk Sea High. On the other hand, there were some places in western Japan where the temperature was higher than normal.



# Weather summary for this period (May 31st to June 6th)
Average temperatures tended to be higher than normal nationwide, with warmer-than-normal air flowing into the skies near Honshu. In Hokkaido, there were places where the temperature was more than 4c above normal, and in most areas from Tohoku to Kyushu, it was 1 to 2c above normal.
Precipitation was significantly above normal in the Nansei Islands affected by the seasonal rain front and Typhoon No. 6, and on the Pacific side of Kyushu to Tohoku, and in some places on the Pacific side of Kyushu to Kanto, it exceeded normal levels by 400%. On the other hand, in northern Japan, the impact of the seasonal rain front and Typhoon No. 6 was small, and the weather was significantly less than normal.
Sunshine hours were lower than normal in the Nansei Islands and western to eastern Japan, where there were many cloudy and rainy days due to the influence of the seasonal rain front and Typhoon No.6. On the other hand, northern Japan, which was less affected by the front and Typhoon No. 6 and had many sunny days, experienced more sunshine hours than normal.

Summary of weather and temperature (May 31st to June 6th) Typhoon No. 6 makes landfall in Wakayama Precipitation is 400% of normal in some places from the Nansei Islands to the Kanto region

2026/06/11 17:55

This is a summary of the weather and temperature from May 31st to June 6th, 2026.


[About this period's weather]
#Characteristics of atmospheric pressure distribution
On the 31st, Typhoon No. 6 moved north over the sea south of Okinawa, and the rainy season front stalled over the sea south of Honshu. On the 1st, Typhoon No. 6 moved north near the main island of Okinawa, and over the 2nd, it gradually changed course to the east and approached southern Kyushu. Over the next 3 days, it moved east along the southern coast of Honshu, making landfall in Wakayama Prefecture in the early morning, then continued eastward, passing near the Izu Islands in the afternoon, and by night it turned into an extratropical cyclone over the sea east of Japan. On the 4th, the Baiu front remained stationary over the sea south of Japan, and a low pressure system formed over the front in the East China Sea, moving eastward through the East China Sea. On the 5th, a rainy season front extended over the southern seas of Japan, and a low-pressure system above the front moved eastward along the southern coast of Honshu. Additionally, a tropical cyclone moved northeast near Taiwan. On the other hand, the Sea of Okhotsk high pressure system extended from northern Japan to eastern Japan. On the 6th, the tropical cyclone turned into an extratropical cyclone near the Nansei Islands and moved northeast through the Nansei Islands, accompanied by a front. The Sea of Okhotsk anticyclone continued to protrude from northern Japan to eastern Japan.

#Precipitation
On the 31st, due to the influence of the seasonal rain front extending around the Nansei Islands, rain fell in Okinawa/Amami, Kyushu, Shikoku, and the Pacific side of western Japan due to the typhoon's northern front. On the 1st, Typhoon No. 6 and its northern front brought rain to the Nansei Islands, Kyushu, Chugoku, Shikoku, and the Kinki region. There was heavy rain in the Nansei Islands, and in Kunigami Village, Okinawa Prefecture, the daily precipitation was 225.5 mm, breaking the highest value for June. On the 2nd, heavy rain fell from the Nansei Islands to the Pacific side of western Japan due to the influence of rain clouds from Typhoon No. 6 and moist air heading toward the front. On the 3rd, Typhoon No. 6 brought heavy rain to a wide area from Tohoku to Shikoku, and in Inatori in Higashiizu Town, Shizuoka Prefecture, the daily precipitation was 255.5 mm, breaking the highest value for June. On the 4th, the front stalled, and the low pressure system above it moved west of Kyushu, causing rain in the Nansei Islands and Kyushu. On the 5th, a low-pressure front moved south from Kyushu to Shikoku, causing rain mainly in southern Kyushu. On the 6th, warm and humid water flowed toward the tropical cyclone and the seasonal rain front, and rain clouds developed over the Nansei Islands. On Kikaijima Island in Kagoshima Prefecture, the daily precipitation was 169mm, breaking the record for June.

#Temperature
On the 31st, the sky was covered with warm air, and the area around Honshu was loosely covered by high pressure, causing clear skies and rising temperatures across the country. In Hita City, Oita Prefecture, the temperature was 34.8 degrees Celsius, just one step away from an extremely hot day. On the 1st, temperatures rose in sunny areas in northern and western Japan, with some areas in the inland Kanto region experiencing extremely hot weather, including 36.0 degrees Celsius in Kiryu City, Gunma Prefecture. On the 2nd, temperatures rose in Hokkaido as warm air flowed into the sky, making it a midsummer day in a wide area, including 32.7 degrees Celsius in Obihiro City. On the 3rd, there were places in the Tohoku and Kanto regions where it rained due to the typhoon, with temperatures dropping below 20 degrees Celsius. In western Japan, where the weather has improved, there are many places with temperatures above 30 degrees Celsius. On the 4th, on the Pacific side of northern and eastern Japan, a humid northeast wind blew, clouds spread, and the temperature did not rise. On the other hand, temperatures rose on the Sea of Japan side of northern Japan and Hokuriku due to the Foehn. On the 5th and 6th, temperatures on the Pacific side of the Kanto and Tohoku regions were lower than normal due to northeasterly winds from the Okhotsk Sea High. On the other hand, there were some places in western Japan where the temperature was higher than normal.



# Weather summary for this period (May 31st to June 6th)
Average temperatures tended to be higher than normal nationwide, with warmer-than-normal air flowing into the skies near Honshu. In Hokkaido, there were places where the temperature was more than 4c above normal, and in most areas from Tohoku to Kyushu, it was 1 to 2c above normal.
Precipitation was significantly above normal in the Nansei Islands affected by the seasonal rain front and Typhoon No. 6, and on the Pacific side of Kyushu to Tohoku, and in some places on the Pacific side of Kyushu to Kanto, it exceeded normal levels by 400%. On the other hand, in northern Japan, the impact of the seasonal rain front and Typhoon No. 6 was small, and the weather was significantly less than normal.
Sunshine hours were lower than normal in the Nansei Islands and western to eastern Japan, where there were many cloudy and rainy days due to the influence of the seasonal rain front and Typhoon No.6. On the other hand, northern Japan, which was less affected by the front and Typhoon No. 6 and had many sunny days, experienced more sunshine hours than normal.

[Kanto/Atmospheric instability] ``Probability of lightning strikes'' high until tomorrow (Friday), with localized heavy rain possible (Commentary: Weather forecaster Atsuko Miyake)

2026/06/11 13:42

Atmospheric conditions will be unstable from today the 11th (Thursday) to tomorrow the 12th (Friday).
Please be careful of sudden changes in the weather even if the weather is sunny.



First, here is the forecast weather map for tonight.
The area around Honshu is covered with high pressure and will have many sunny days.
The rainy season front and low-pressure system have temporarily moved away over the southern ocean, and sunny skies are returning to Okinawa.

However, cold air in the upper atmosphere, which does not appear on this weather map, is expected to flow in from tonight until tomorrow.

Where the temperature near the ground is high, cold air flows into the sky.
The temperature difference between the sky and the ground becomes large, making the atmosphere unstable.
Lightning will be more likely to occur.



Lightning probability. As of 3:00 pm today, lightning is still limited to northern Tohoku and parts of Hokkaido, but by night, the probability of lightning strikes will increase in northern Kanto and the Chugoku region.



Let's also look at the rain forecast.
It's mostly sunny now, but in the afternoon, rain clouds will start to roll in from the mountains.

In particular, rain clouds will develop along the mountains in the north and west of the Kanto region, around the Chugoku Mountains and the Tohoku region,
along the mountains of Hokkaido.

Additionally, towards the evening, active rain clouds are expected to move into the northern Kanto region,
not only along the mountains, but also on the plains.

In the northern Kanto region, rain and thunderstorms may linger into the early hours of tomorrow (Friday).

As the rain continues to be strong, it is likely that small and medium-sized rivers will suddenly overflow, and that landslides may occur.

There are some places where the rain peaks during the dark hours, so please be sure to sleep tonight away from cliffs on the second floor or above.



Tomorrow (Friday), the atmospheric condition will be even more unstable.
Looking at the probability of lightning strikes tomorrow afternoon,
the probability of lightning strikes is high in a wide range of areas, including the Kanto and Hokuriku regions, the Tohoku region, and Hokkaido.

Furthermore, by 3:00 pm, there is a purple display and the probability of lightning striking is over 80%.
Tomorrow, the ground will be even warmer than today, and strong cold air will flow into the sky.

The difference in temperature between the ground and the sky will be larger tomorrow than today, causing
atmospheric instability.

You will need to be more careful due to changes in the sky.

Please be careful of sudden strong rain, lightning, strong gusts of wind such as tornadoes, and hail.



This is the weather and expected temperature from today (Thursday) to tomorrow (Friday).

Today, tomorrow and sunny marks stand out.
However, don't be fooled by this sunny mark.
From dusk to night, rain clouds that form along the mountains may flow into the plains.
Please bring rain gear when you go out tomorrow.
And in western Japan, the temperature rises during the day to around 30c.
Here you will also need measures against the heat.




Weekly forecast.
On Saturday the 13th, there will be many sunny spells around Honshu.
However, from Sunday to Monday, a rainy season front and a low pressure system will develop and approach.

From the 14th (Sunday) to the 15th (Monday), heavy rain will occur from western Japan to the Pacific side of eastern Japan,
, as well as Okinawa and Amami, and there is a risk of heavy rain reaching warning level in some places.

Okinawa is likely to experience heavy rain at the end of the rainy season, so please be careful about how the rain falls.

Today's weather on the 11th (Thursday): Atmospheric instability. Even if it's sunny, be careful of changes in the sky. Weather in Okinawa is prone to rain.

2026/06/11 06:18

Today, the 11th (Thursday), the area around Japan will be covered in high pressure and it will be sunny in many places. However, as cold air flows into the upper atmosphere, atmospheric conditions are likely to become unstable. Okinawa will continue to be affected by the rainy season front, and the weather is likely to be prone to rain.



There will be clouds in some places from northern Japan to western Japan, but it will be mostly sunny in many places. However, due to the effects of cold air in the upper atmosphere, there is a risk that the weather in northern Japan, eastern Japan, and the Chugoku region could suddenly change, especially in inland areas and along mountains. Even if it's sunny when you go out, it's a good idea to pay attention to changes in the sky and prepare a folding umbrella.

The rainy season weather is expected to continue in Okinawa, where the rainy season front is stationary. Caution is advised as locally heavy rain and thunderstorms are possible. Please be careful of the heavy rain in the Sakishima Islands at night.

The temperature in many places in northern Japan is typical of this time of year, so it will be a comfortable experience. The Kanto and Hokuriku regions are also relatively comfortable during the day at around 25 degrees Celsius. Temperatures are expected to rise to around 30 degrees Celsius from the Tokai region to western Japan. If you are active outdoors, please be conscious of hydrating frequently.

Landslide danger warning announced on Miyakojima; heavy rain expected in Okinawa until tomorrow the 11th

2026/06/10 19:01

The rainy season front is moving from near Taiwan, passing around the Nansei Islands, and extending to the east of Japan. Additionally, in the East China Sea on the front, there is a low pressure system that has changed from a tropical cyclone and is moving eastward.



As moist air from the tropics is flowing into low pressure systems and fronts, rain clouds are becoming more active, and as of 6:30 p.m., a level 4 landslide warning has been announced in the Miyakojima region. In the Miyakojima region, the ground has become loose in some places due to the rain that has fallen so far, so strict vigilance against landslides is required into late tonight.



In the Okinawa region, the influence of the rainy season front and the low pressure above the front will continue, and atmospheric conditions are expected to become extremely unstable from tomorrow until the 12th (Friday).
A low-pressure system that has changed from a tropical cyclone is expected to pass near Okinawa from this time of year until dawn tomorrow, and heavy rain is expected to occur in some places in the Okinawa main island and Yaeyama regions. Sufficient attention must be paid to landslides, flooding of low-lying areas, and rising river waters.
Depending on the degree of rain cloud development, there is a risk of warning-level heavy rain in the main island of Okinawa until the 11th (Thursday) and in the Sakishima Islands until the 12th (Friday).
Please be careful of strong gusts of wind such as lightning and tornadoes in the Okinawa main island region and Daitojima region until tomorrow the 11th (Thursday), and in the Sakishima Islands until tomorrow the 12th (Friday).

[Rain live report]
Precipitation amount from the start of rain (00:00 on the 9th to 16:00 today on the 10th) (preliminary figures from AMeDAS)
Itokazu, Nanjo City 101.0mm
Kunigami Village 92.5mm
Hikawa, Naha City 82.0mm
Shimojishima Airport 166.0m m
Tarama Airport 86.0mm
Shimosato, Miyakojima City 65.5mm
Yonaguni Town Sonai 137.5mm
Yona National Airport 128.5mm
Taketomi-cho Uehara 82.0mm

[Rain Forecast]
#Expected amount of rain (in places with a lot)
+ki Expected hourly precipitation on today's 10th
Okinawa main island region 30mm
Miyakojima region 50mm
Yaeyama region 40mm
+1-hour precipitation expected for tomorrow 11th (Thursday)
Okinawa main island region 30mm
Yaeyama region 30mm
+Tomorrow 11th Precipitation expected for 24 hours by (Thursday) evening
Okinawa main island region 70mm
Miyakojima region 100mm
Yaeyama region 60mm
+24-hour precipitation expected by Friday evening on the 12th
Miyakojima region 80mm
Yaeyama region 80mm

[Marine Summary] Fierce drowning near Typhoon No. 6 Sea water temperature tends to be lower than normal near the Nansei Islands and east of Kanto

2026/06/10 00:48

A severe storm occurred near the center of Typhoon No.6.
Sea water temperatures were lower than normal in the waters around the Nansei Islands and southeastern Kanto.
Below is a summary of the ocean (May 31, 2026 - June 6, 2026)



#Pressure distribution and waves
From the 31st to June 1st, the area around Honshu was gently covered by high pressure, and a front remained stationary from the east of Japan to the south of Kyushu. Typhoon No. 6 is heading north from the east of Taiwan with strong winds. The waves gradually got higher in the south of Okinawa. On the 2nd, the high pressure system moved east of Japan, and Typhoon No. 6 moved northeast south of Kyushu and made landfall on the Kii Peninsula late at night. A severe drought occurred near the center of the typhoon. On the 3rd, Typhoon No. 6 became large with strong winds and moved east-northeast south of Kanto, turning into an extratropical cyclone at night. It became a barge on the Pacific side of Kanto-Shikoku. From the 4th to the 5th, the low pressure system moved away to the east of Japan and became a barge off the coast of Sanriku and east of the Kanto region. On the 6th, a low pressure system moved eastward into the Sea of Japan, causing wave heights of around 4 meters in the northern part of the Sea.



#Sea surface temperature
Sea surface temperatures in the northern part of the Japanese Sea were at normal levels, but in the central and western continental areas, sea areas continued to be significantly higher than normal, with temperatures as high as 3 C. The East China Sea and the waters near the Nansei Islands were below normal, with temperatures up to 2 C lower. Off the coasts of Shikoku and the Tokai Sea, sea levels continue to be higher than normal. Sea surface temperatures were lower than normal from the southeastern Kanto region to Minamitorishima. In southeastern Hokkaido, areas of lower-than-normal waters expanded. Off the coast of Sanriku, sea temperatures continued to be lower than normal, with temperatures as low as 3 C.