[Last-minute forecast for linear rain belt] Linear rain belt is likely to occur in Nagasaki and Saga prefectures within the next 3 hours. Strict alert for heavy rain disasters such as landslides

2026/07/01 22:29

Just after 9:30 p.m. today (Thursday), the Japan Meteorological Agency announced an immediate forecast for a linear precipitation band, stating that there is an increasing possibility that a linear precipitation band will form in northern Nagasaki Prefecture within the next three hours. In addition, just after 10 p.m., a preliminary report was announced stating that there was an increased possibility of a linear precipitation band forming within the next three hours in northern Saga Prefecture.

The rain cloud radar shows very active rain clouds hanging over Nagasaki Prefecture in northern Kyushu. In Sasebo City, Nagasaki Prefecture, heavy rain of 31.0 mm per hour was observed as of 9:40 p.m., and there are areas in Nagasaki Prefecture and Saga Prefecture where a Level 4 landslide warning has been announced. In northern Kyushu, a Level 3 heavy rain warning has been announced for Fukuoka, Saga, and Nagasaki prefectures.



If linear precipitation bands occur in the future, the risk of life-threatening heavy rain disasters will rapidly increase. Please be extremely cautious of landslides, flooding of low-lying areas, rising water levels and flooding of rivers, etc.

Please avoid approaching dangerous areas such as rivers and cliffs, and take appropriate evacuation actions in accordance with evacuation information issued by local governments. If it is difficult to evacuate, please try to ensure your safety by moving to a higher place such as the second floor of your home or higher.

Weather for tomorrow 2nd (Thursday): The area of rain will further expand...

2026/07/01 17:45

A low-pressure system on top of the seasonal rain front is expected to pass over the southern coast of Honshu.



Rain is falling over a wide area from Kyushu to southern Tohoku due to the influence of the rainy season front and low pressure, and the heat seems to be calming down. The rain in western Japan will subside in the morning, but clouds will likely spread in the afternoon as well. Please be careful of heavy rain and thunderstorms mainly on the Pacific side. The rain is expected to increase in the Kanto region during rush hours, with the peak expected to be in the morning. There is a risk of strong winds and heavy rain along the coast. Hokkaido will be covered in high pressure and will have many sunny days. Please be careful of sudden rain in the afternoon along the mountains.

Weather for tomorrow 2nd (Thursday): The area of rain will further expand...

2026/07/01 17:45

A low-pressure system on top of the seasonal rain front is expected to pass over the southern coast of Honshu.



Rain is falling over a wide area from Kyushu to southern Tohoku due to the influence of the rainy season front and low pressure, and the heat seems to be calming down. The rain in western Japan will subside in the morning, but clouds will likely spread in the afternoon as well. Please be careful of heavy rain and thunderstorms mainly on the Pacific side. The rain is expected to increase in the Kanto region during rush hours, with the peak expected to be in the morning. There is a risk of strong winds and heavy rain along the coast. Hokkaido will be covered in high pressure and will have many sunny days. Please be careful of sudden rain in the afternoon along the mountains.

Heavy rain and thunderstorms in western Japan; strict alert for landslides through tomorrow 2nd

2026/07/01 12:30

The front is moving from central China to the Kyushu region and extending to the east of Japan. Additionally, there is a frontal low pressure system near Jeju Island that is moving east-northeast.

As warm, humid air flows toward fronts and low pressure systems, rain clouds have developed from the East China Sea to the Tsushima Strait, with heavy rain accompanied by lightning of 42.5 mm/h in Izuhara, Tsushima City, Nagasaki Prefecture, and 33.5 mm/h in Mitsushima Island.




From now on, the front will slowly move north, and the low pressure above the front will move towards the Sea of Japan on the 2nd tomorrow. The rain is expected to spread to eastern Japan from this afternoon until the 2nd tomorrow.
Atmospheric conditions will be extremely unstable around fronts and low pressure systems, so heavy rain is expected to occur, with heavy rain accompanied by thunder and extremely heavy rain of over 50mm per hour.

In western Japan, there are some places, mainly in northern Kyushu, where the ground has become loose due to the rain that has fallen so far. It is expected that the rain will become heavier again through the 2nd of tomorrow, so please be extremely careful about landslides and be careful of flooding of low-lying land and rising water levels of rivers.
Also, be careful of strong gusts of wind such as lightning and tornadoes.

[Rain Forecast]
Western Japan is expected to experience heavy to very heavy rain with thunder and lightning.

#Expected amount of rain (in areas where there is a lot)
+Precipitation expected for 24 hours by noon on the 2nd tomorrow
Kinki region 120mm
Chugoku region 100mm
Shikoku region 120mm
Northern Kyushu 150mm
Southern Kyushu 150mm

[Marine Summary] Typhoons No. 7 and No. 8 approach, large storms near the typhoons (June 21-27, 2026)

2026/07/01 03:57

Due to the effects of the low pressure system, barges were closed throughout the Sea of Japan. In the second half of the
period, typhoons No. 7 and No. 8 approached, causing major damage in the vicinity of the typhoons.
Below is a summary of the ocean (June 21-27, 2026)



#Pressure distribution and waves
On the 21st, a low pressure system moved eastward in the Sea of Japan, causing waves to rise throughout the Sea of Japan. On the 22nd, waves continued to be high in Japanese waters. Meanwhile, to the east of Kanto, a low pressure front has formed and is moving eastward. Waves rose off the coast of Sanriku and it became a barge. From the 23rd to the 25th, Typhoon No. 7 approached the Nansei Islands. The waves increased near the typhoon and became large, with wave heights of around 7 meters. On the 26th, typhoons No.7 and No.8 headed north. Waves increased near the Nansei Islands and the southern coast of Honshu. On the 27th, Typhoon No. 8 passed near the southern coast of Kanto, and Typhoon No. 7 passed from the southern coast of western to eastern Japan. Waves were rising from the south of Japan to the Nansei Islands, with wave heights of around 5 meters.



#Sea surface temperature
Sea surface temperatures in the Japanese waters continued to be about 1c higher than normal, although the area where the sea surface temperature is much higher than normal has shrunk. In eastern Honshu, the area where sea surface temperatures are significantly higher than normal has shrunk, but temperatures continue to be higher than normal over a wide area. In the northern East China Sea, the area where sea surface temperatures are significantly higher than normal is shrinking. In the south of Japan, the area of sea where sea surface temperatures are much lower than normal is shrinking. In the south of Okinawa, sea surface temperatures continue to be lower than normal in areas. In the sea near Chichijima, the area where sea surface temperatures were significantly higher than normal decreased, but the sea surface temperatures continued to be higher than normal over a wide area.

Weather for tomorrow 1st (Wednesday): Rain in a wide area in western Japan

2026/06/30 18:25

The seasonal rain front is expected to gradually move northward and stay near Honshu.



Rain is expected to spread further east, with rain expected to cover a wide area of western Japan.
It will rain in many places in Kyushu, Shikoku, and Chugoku in the morning, and it will start raining in the afternoon in the Kinki and Tokai regions as well. Please be wary of heavy rain accompanied by thunder in Kyushu.
The Kanto region is expected to continue to be cloudy and humid. Northern Japan will be covered in high pressure and will have many sunny days, but mornings and evenings will be cool, and the temperature difference throughout the day is likely to be large.
There is a risk of sudden thunderstorms in inland Honshu due to cold and humid air in the upper atmosphere. Please bring a folding umbrella.

Weather for today, the 30th (Tuesday): The rainy season front is stationary from southern Kyushu to the southern coast of Honshu. Southern Kyushu is on alert for heavy rain.

2026/06/30 10:27

Today, the 30th (Tuesday), the rainy season front is expected to extend from southern Kyushu to the southern coast of Honshu. There is a risk of warning-level heavy rain in the Satsuma/Osumi, Tanegashima, and Yakushima regions into the late evening. In addition, the atmospheric conditions will be unstable due to the effects of cold and humid air in the upper atmosphere, and showers and thunderstorms are likely to occur in places in the afternoon.



In southern Kyushu, it will rain intermittently, and there will be places where it will fall heavily with thunder. There is a risk of warning-level heavy rain, and you need to be careful about landslides, flooding of low-lying land, and rising river waters. Although there will be sunshine from the Chugoku region to Hokkaido, rain and thunderstorms are expected in some places in the afternoon. Additionally, the seasonal rain front will move northward to the southern coast of Kyushu, and warm, humid air will flow toward the front from the south. It will be cloudy in Kyushu and Shikoku, and it will rain here and there. There is a risk of warning-level heavy rain in the Satsuma/Osumi, Tanegashima, and Yakushima regions into the late evening. Please be careful of landslides, flooding of low-lying land, and rising river waters.

On the other hand, it will be sunny or cloudy from the Chugoku region to Hokkaido, and there will be some rain and thunderstorms in the afternoon, mainly along the mountains. Even if it is sunny, please be careful of sudden heavy rain, lightning strikes, and gusts of wind.
After the rainy season, Okinawa is expected to be mostly sunny, with strong sunlight shining during the day.

Weather for today, the 30th (Tuesday): The rainy season front is stationary from southern Kyushu to the southern coast of Honshu. Southern Kyushu is on alert for heavy rain.

2026/06/30 06:37

Today, the 30th (Tuesday), the rainy season front is expected to extend from southern Kyushu to the southern coast of Honshu. There is a risk of warning-level heavy rain in the Satsuma/Osumi, Tanegashima, and Yakushima regions into the late evening. In addition, the atmospheric conditions will be unstable due to the effects of cold and humid air in the upper atmosphere, and showers and thunderstorms are likely to occur in places in the afternoon.



In southern Kyushu, it will rain intermittently, and there will be places where it will fall heavily with thunder. There is a risk of warning-level heavy rain, and you need to be careful about landslides, flooding of low-lying land, and rising river waters. Although there will be sunshine from the Chugoku region to Hokkaido, rain and thunderstorms are expected in some places in the afternoon. Additionally, the seasonal rain front will move northward to the southern coast of Kyushu, and warm, humid air will flow toward the front from the south. It will be cloudy in Kyushu and Shikoku, and it will rain here and there. In southern Kyushu, it will rain intermittently, and in some places it will rain heavily with thunderstorms. There is a risk of warning-level heavy rain in the Satsuma/Osumi, Tanegashima, and Yakushima regions into the late evening. Please be careful of landslides, flooding of low-lying land, and rising river waters.

On the other hand, it will be sunny or cloudy from the Chugoku region to Hokkaido, and there will be some rain and thunderstorms in the afternoon, mainly along the mountains. Even if it is sunny, please be careful of sudden heavy rain, lightning strikes, and gusts of wind.
After the rainy season, Okinawa is expected to be mostly sunny, with strong sunlight shining during the day.

Weather for today, the 30th (Tuesday): The rainy season front is stationary from southern Kyushu to the southern coast of Honshu. Southern Kyushu is on alert for heavy rain.

2026/06/30 06:37

Today, the 30th (Tuesday), the rainy season front is expected to extend from southern Kyushu to the southern coast of Honshu. There is a risk of warning-level heavy rain in the Satsuma/Osumi, Tanegashima, and Yakushima regions into the late evening. In addition, the atmospheric conditions will be unstable due to the effects of cold and humid air in the upper atmosphere, and showers and thunderstorms are likely to occur in places in the afternoon.



In southern Kyushu, it will rain intermittently, and there will be places where it will fall heavily with thunder. There is a risk of warning-level heavy rain, and you need to be careful about landslides, flooding of low-lying land, and rising river waters. Although there will be sunshine from the Chugoku region to Hokkaido, rain and thunderstorms are expected in some places in the afternoon. Additionally, the seasonal rain front will move northward to the southern coast of Kyushu, and warm, humid air will flow toward the front from the south. It will be cloudy in Kyushu and Shikoku, and it will rain here and there. In southern Kyushu, it will rain intermittently, and in some places it will rain heavily with thunderstorms. There is a risk of warning-level heavy rain in the Satsuma/Osumi, Tanegashima, and Yakushima regions into the late evening. Please be careful of landslides, flooding of low-lying land, and rising river waters.

On the other hand, it will be sunny or cloudy from the Chugoku region to Hokkaido, and there will be some rain and thunderstorms in the afternoon, mainly along the mountains. Even if it is sunny, please be careful of sudden heavy rain, lightning strikes, and gusts of wind.
After the rainy season, Okinawa is expected to be mostly sunny, with strong sunlight shining during the day.

Weather in the Kanto region looks like the rainy season ahead. Be careful of heavy rain. Weekly weather in the Kanto region

2026/06/29 22:26

From now on, the front will stay near Honshu, and the Kanto region is likely to experience sluggish weather typical of the rainy season.



Tomorrow, the 30th (Tuesday), the Kanto region will be gently covered by a high pressure system centered over the Sea of Japan. On the other hand, the seasonal rain front that extends south of Japan will move northward, so it is expected to be affected by humid air. There will be periods of sunshine during the day, but clouds will likely spread. There is a possibility of rain in the evening, so it's a good idea to bring a foldable umbrella with you when you go out.



The front is expected to move further north tomorrow, July 1st (Wednesday). Clouds will likely spread over the Kanto region.

The low pressure front is expected to move eastward from the 2nd (Thursday) to the 3rd (Friday). It will rain widely in the Kanto region. Looks like it's time for an umbrella.
There is a possibility that the rain will become stronger locally, resulting in heavy rain. Please check the latest information.

After the 4th (Saturday), the front will remain stationary near Honshu, and the weather will continue to be cloudy.

Please note that the way the rain falls will change depending on the location of the front and the degree of development of the low pressure above the front, so please check the latest weather forecast and prepare for heavy rain disasters.



Even if the clouds tend to spread, the maximum temperature is expected to be higher around the 30th (Tuesday) and July 1st (Wednesday). There are some places where midsummer days are expected to reach 30 degrees Celsius, so please take precautions against heat stroke.
Even on rainy days, the high humidity makes it difficult for sweat to evaporate, making it difficult for your body temperature to drop and putting you at risk of heatstroke. Don't forget to take precautions against heatstroke, such as staying hydrated and taking breaks.