Last minute prediction of a linear rain band in the main island of Okinawa. Be on guard for a linear rain band until tonight!

2026/06/15 18:45

In the Okinawa main island region, please be extremely cautious of landslides, flooding of low-lying areas, and rising and flooding rivers. In the northern part of the main island, there is a high possibility that a linear precipitation band will develop over the next three hours, causing very heavy rain to continue in the same area. The risk of a life-threatening disaster may increase rapidly.



Atmospheric conditions in the main island of Okinawa are extremely unstable due to the rainy season front and moist air flowing into the front. This situation is expected to continue until the 16th.

[Rain Forecast]
The predicted hourly precipitation on the 15th is high in places,
South-Central Main Island 50 mm
Northern Main Island 50 mm
Kumejima 50 mm
The high rainfall expected in 1 hour on the 16th is
South-Central Main Island 40 mm
Northern Main Island 40 mm
Kumejima 40 mm
The expected 24-hour precipitation from 18:00 on the 15th to 18:00 on the 16th is expected to be high in the central and southern parts of the main island, 150 mm
in the northern part of the main island, and 150 mm
in Kumejima. If a linear precipitation band develops, there is a risk of locally increased rainfall.

In the Okinawa main island region, extremely heavy rain is expected to occur in some places on the 15th. In the northern part of the main island, there is a high possibility that a linear precipitation band will develop over the next three hours, causing very heavy rain to continue in the same area. The risk of a life-threatening disaster may increase rapidly. Please be extremely cautious of landslides, flooding of low-lying areas, and rising and flooding rivers.

Level 4 landslide warnings and level 3 heavy rain warnings have been announced for a wide area in the central and southern parts of the main island. In the central and southern parts of the main island, please be on high alert for landslides through the 15th, and be on guard against flooding of low-lying land, rising water levels and flooding of rivers.
Please note that depending on the degree of rain cloud development, there is a risk that Level 4 danger warnings and Level 3 warnings will be issued for more areas in the main island of Okinawa on the 15th.

In the Okinawa main island region, please be careful of strong gusts such as lightning and tornadoes through the 16th. If there are signs that a developed cumulonimbus cloud is approaching, please take precautions such as moving inside a building. ,

Weather for tomorrow 6/16 (Tuesday): Weather recovery; heavy rain warning for Okinawa

2026/06/15 18:28

The low pressure system is expected to move away to the east of Japan, and the migratory high pressure system in the Sea of Japan is expected to approach Honshu. The rainy season front will move northward and approach southern Kyushu.




Sunshine will reach a wide area, but it will rain in Okinawa/Amami and the Pacific side of western Japan, which are close to the rainy season front.
Due to the warm and humid air flowing towards the front, developed rain clouds will flow in one after another, causing temporary heavy rain in Okinawa and Amami. Please act with safety first.
There is a risk that the rain may temporarily increase on the Pacific side of western Japan. Don't forget your umbrella.
In areas where it rains, you may experience a damp feeling typical of the rainy season.
In western Japan, eastern Japan, and northern Japan, temperatures will rise during the day and it will be very hot.

Today, Monday, the 15th, the afternoon weather will be sunny from Kyushu to the Tokai region. Be careful of thunderstorms in northern Japan

2026/06/15 12:26

The afternoon of today, Monday, the 15th, will be sunny from Kyushu to the Tokai region, but there will be some showers. There is a risk of rain and thunderstorms in Hokuriku, Tohoku, and Hokkaido, and there will be places in Tohoku where it will rain heavily. Okinawa and Amami are prone to rain clouds that develop due to the influence of the rainy season front, so you need to be careful about localized heavy rain and lightning strikes. The maximum temperature will be more than 5 degrees Celsius lower than yesterday in some places in the Kanto region.



From Kyushu to the Tokai region, there will be clear skies during the day, but there will be showers in some areas. In the northern part of the Kanto region, there will likely be some lingering rain in the afternoon. Atmospheric conditions in Hokuriku, Tohoku, and Hokkaido are unstable due to cold air in the upper atmosphere. Scattered showers and thunderstorms are expected, with locally heavy rainfall expected in the Tohoku region.
Be careful of strong winds such as tornadoes, lightning, hail, and sudden heavy rain towards the beginning of the night.



The rainy season front will continue to remain stationary in Amami and Okinawa, and rain clouds will develop in places. Locally heavy rain will fall, and Amami is likely to experience very heavy rain.
The maximum temperature will be the same or higher than yesterday in many places from Kyushu to the Tokai region. It seems that there are places where the temperature will rise to nearly 30 degrees Celsius.
The temperature in the Kanto region is more than 5c lower than yesterday, and the temperature is likely to reach 20c. It looks like it would be cool with short sleeves.
In Hokuriku, Tohoku, and Hokkaido, the temperature will not be as high as yesterday, but there will be places where the temperature will rise to around 25c.

Weather for the week: Beware of heavy rain at the end of the rainy season in Okinawa. The rainy season front is gradually moving north towards Honshu.

2026/06/15 07:48

From now on, the Baiu front, which has been stationary in the south of Honshu, is expected to gradually move north toward Honshu.



Tomorrow, the 16th (Tuesday), many places near Honshu will be covered in high pressure and it will be sunny. In the Kanto region, the temperature will rise compared to today, the 15th, and many places will feel hot and humid. In western Japan, it is likely to get as hot as 30 degrees Celsius in areas where the sun can reach. Please be careful of heat stroke.
Southern Kyushu and Okinawa will experience rain due to the seasonal rain front, and there is a risk of extremely heavy rain in the Amami region. Please be careful of landslides, flooding of low-lying land, rising river water, etc.

The rainy season front is expected to gradually move northward, and a Pacific anticyclone is expected to extend over Okinawa around the 18th (Thursday). After that, the rain will subside near Okinawa, and there may be some sunny days over the weekend. There may be an announcement about the end of the rainy season.

On the other hand, the rainy season front is expected to remain stationary near Honshu for many days, and there will likely be many cloudy and rainy days from western to eastern Japan. In Hokuriku and Tohoku, the rainy season will be announced soon.
Around the 21st in western Japan, a frontal low pressure system is developing and moving forward, and its movement may slow down near the western Sea of Japan. There is a wide range of predictions regarding the course and strength of the low pressure system at this time, but there is a possibility of stormy weather in the area surrounding the low pressure system, so please pay attention to weather information that will be updated in the future.

Weather forecast for tomorrow, the 15th (Monday): It will be a chilly day with rain in the Kanto region since the morning. Okinawa and Amami will continue to be careful of heavy rain.

2026/06/14 20:02

Tomorrow, the 15th (Monday), the rainy season front will continue to remain stationary in the south of Honshu. Furthermore, a low-pressure system is expected to move eastward above the seasonal rain front and pass near the Izu Islands.



Rain will spread across the Kanto-Koshin region from the morning. Since the rainy season coincides with commuting time, please bring a large umbrella with you. It is expected to stop in many places in the afternoon. In the southern part of the Izu Islands, there is a risk of heavy rain accompanied by thunder in the morning, so please be careful of landslides and flooding of low-lying areas.
In Kyushu, it looks like there will be some rain mainly in the morning.

In northern Japan, there are likely to be showers and thunderstorms in small areas inland and along mountains, mainly in the afternoon. It's a good idea to carry a folding umbrella when you go out.

Okinawa/Amami will continue to experience rain due to the stationary seasonal rain front, and there will be heavy rain with thunder in some places in the afternoon. As the ground is loose in some places due to heavy rains, please be careful of landslides, flooding of low-lying areas, and rising river levels.



The temperature tomorrow will not rise much in the Kanto region due to rain and cold easterly winds, and will likely be around 20c in many places. It may feel chilly, so it would be a good idea to bring something light to wear.
In many other areas, the temperature will be around normal, and in some places where the sun shines, it is likely to rise to nearly 30 degrees Celsius. It will be a humid experience typical of the rainy season.

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.