[Weekly Weather] Beware of thunderstorms north of Kanto tomorrow! After that, sunlight prevails (commentary: weather forecaster Atsuko Miyake)

2026/05/07 13:36

Today, the 7th (Thursday) after the holidays, many places are sunny.
Okinawa, which recently entered the rainy season, is now experiencing a sunny spell during the rainy season.



The temperature is rising in many places due to this sunshine.
In Kamioka, Hida City, Gifu Prefecture, the temperature was 29.2c by noon, approaching the height of midsummer.

Temperatures are also rising in the Tohoku region, with
Shizugawa, Miyagi Prefecture recording the hottest temperature of the year at 28.0c.
Tokyo also experienced summer for the first time in three days at 25.1c.



Today, the 7th (Thursday), the temperature is likely to rise even further.
Looking at the weather and predicted maximum temperature for today, the 7th (Thursday),
Yamagata, Fukushima, and Kofu are also expected to reach 29c.
Even in the Tohoku region, it will be as hot as a midsummer day.
The temperature difference from yesterday will be large in some places, so
Please take good care of your physical condition.



And tomorrow, the 8th (Friday), a low pressure system will form in the Sea of Japan and off the coast of Sanriku.

As there is cold air above this low pressure system,
atmospheric conditions are expected to become unstable mainly in eastern and northern Japan near the low pressure system.



Let's take a look at the rain forecast for tomorrow, the 8th (Friday).

If you check the forecast from 9:00 a.m. on Friday the 8th,
it looks like there will be rain in the
morning from Hokkaido and Hokuriku to the Kinki region, where
the low pressure system is approaching.

In the afternoon, rain is expected to begin in the Tohoku and Kanto regions.
There is also a risk of heavy rain accompanied by thunder.
Especially at night,
east and northern Japan should be careful of sudden heavy rain, lightning,
gusty winds, and hail.



The rain tomorrow, the 8th (Friday), will mostly stop by the morning of the 9th (Saturday).
It looks like it will be sunny in many places during the day on Saturday and Sunday.
From now on, there will be many sunny days
During the day, the temperature will rise to around 25c.
There is a large difference in temperature between morning and evening and during the day, so please be sure to dress accordingly.


In Okinawa and Amami, where the rainy season has begun, it is likely that rain will continue into the middle of next week.

Tomorrow night, the atmosphere will be unstable in northern Japan and northern Kanto; watch out for sudden thunderstorms

2026/05/07 12:20

Towards the evening of today, the 7th, two low-pressure systems located in the sea near the Chishima Islands and in the western Sea of Japan,
and a front extending from east to west near the Izu Islands are expected to approach Japan.



On the 8th tomorrow, a low pressure system in the western Japan Sea is expected to move toward Hokkaido, and another low pressure system is expected to form off the coast of Sanriku.
As a result of this, winds will blow southerly around Japan, making it easier for warm, humid air to flow towards
fronts and low pressure systems.



Meanwhile, strong cold air for this time of year is expected to move southward in the sky, mainly over northern Japan.
The presence of warm, humid air near the ground and strong cold air above will make the atmosphere extremely unstable, making it likely that cumulonimbus clouds will develop rapidly.
Please be careful of sudden changes in weather.






If you feel the following changes, it is a sign that a cumulonimbus cloud is approaching.
#The sky has suddenly become dark
#The wind has suddenly become cold
#I can hear thunder, etc.
Please evacuate to a safe building immediately.

Weather for the week: Rain and thunderstorms on the 8th (Friday) mainly on the Sea of Japan side; rainy season continues in Okinawa, so be careful about how it rains

2026/05/06 20:04

From now on, it is likely to rain on the 8th (Friday) in the second half of the week, mainly on the Sea of Japan side. From the 10th (Sunday) onwards, there will be many sunny days around Honshu, but Okinawa will continue to experience rainy weather.



From the 8th (Friday) to the 9th (Saturday), a trough or low pressure system will pass near northern Japan. The atmospheric conditions will be unstable due to the influence of cold air in the upper atmosphere, and rain and thunderstorms will occur mainly in areas along the Sea of Japan, such as Hokkaido, Tohoku, and Hokuriku. Please be aware of changes in the sky as there is a possibility of heavy rain, thunderstorms, tornadoes, and strong wind gusts occurring in a short period of time. Also, even in areas where there is no rain symbol in the weather forecast, there is a possibility of showers or thunderstorms, so it is a good idea to bring a foldable umbrella when going out.

After the weekend, the 10th (Sunday), there will be many sunny days around Honshu. However, around the 12th (Tuesday), there may be rain and thunderstorms in some inland areas due to the influence of cold air in the upper atmosphere. There are some places where the temperature during the day can reach over 25 degrees Celsius, but the difference in temperature between morning and afternoon tends to be large, so please dress accordingly and stay in shape.

Okinawa/Amami has many rainy days, and the rainy season will continue. The front is likely to stagnate, and the center of low pressure is expected to pass through frequently. There is a risk of severe thunderstorms occurring when the center of the low pressure system passes through, so you need to be careful about how the rain falls.
Typhoon No. 5 occurred in the Caroline Islands on Thursday the 6th. The typhoon is expected to move westward and have no direct impact on areas near Japan, but there is a risk that moist air from the typhoon will flow into areas near Okinawa, leading to increased front activity. Please pay attention to future weather information.

Typhoon No. 5 (Hug Pete) occurs

2026/05/06 17:51

The Japan Meteorological Agency announced that at 16:15
today, the 6th, a tropical cyclone that was moving west near the Caroline Islands has developed into a typhoon.
As of 3pm today, Typhoon No. 5 is moving slowly to the west. The central pressure is 1002hPa, the maximum wind speed is 18m/s, and the maximum instantaneous wind speed is 25m/s.



It is expected to continue westward for a while and develop slightly, but it is expected to change course to the west-northwest on the evening of the
8th and move east of the
Philippines by the 11th.

Please pay attention to future typhoon information.

Tropical cyclone information: If it occurs, it will become typhoon No.5

2026/05/06 12:39

According to the Japan Meteorological Agency, as of 9 a.m. today, the 6th, the tropical cyclone near the Caroline Islands is moving west at 10 km/hr. The central pressure is 1006hPa, the maximum wind speed is 15m/s, and the maximum instantaneous wind speed is 23m/s.



It is expected to develop into a typhoon on the night of today, the 6th.
If it develops into a typhoon, it will become ``Typhoon No.5''.

It is expected to change course to the west-northwest on the morning of the 8th and move east of the
Philippines by the morning of the 11th.



At this stage, it is not expected that the typhoon will approach Japan, but the predicted path of the typhoon will become wider as the forecast period becomes longer. Please pay attention to future information.

Okinawa region: Heavy rain likely in the afternoon. Be careful of landslides and flooding in low-lying areas.

2026/05/06 09:03

The rainy season front is extending from the Sakishima Islands to the south of Japan. In the Okinawa region, atmospheric conditions are expected to be extremely unstable until tomorrow the 7th (Thursday) due to the influence of the rainy season front.

The Sakishima Islands are experiencing heavy rain due to the passage of rain clouds that developed from early morning to early morning.
In Ohara, Taketomi Town, Okinawa Prefecture, heavy rain of 92.0mm was observed in the hour until 2:39.

[Rain live report]
Precipitation amount from the start of rain (00:00 on the 5th to 04:00 on the 6th (preliminary report by AMeDAS)
Okinawa main island Region
Tokashiki Village Tokashiki Island 51.0mm
Tonaki Motobu Town Jaka 46.5mm
Miyakojima region
Tarama Airport 39.5mm
Yaeyama region
Taketomi-cho Ohara 139.5mm
Ishigaki City Tono Castle 106.0mm
Yonaguni Town Sonai 104.5mm



In the Okinawa main island region and Miyakojima region, there will be heavy rain in some places until the afternoon of today, the 6th, and depending on the degree of rain cloud development, there is a risk of heavy rain reaching warning level. Please be careful of landslides, flooding of low-lying areas, and rising river waters.
Okinawa Main Island region and Sakishima Islands should be careful of strong gusts such as lightning and tornadoes today on the 6th, and in Daitojima region tomorrow on the 7th (Thursday).

#Expected amount of rain (in places where there is a lot)
+Precipitation expected per hour for today, the 6th
Okinawa main island region 30mm
Miyakojima region 40mm
Yaeyama region 90 mm
+Precipitation expected for 24 hours by dawn on the 7th (Thursday) tomorrow Okinawa main island region 80 mm
Miyakojima region 100 mm
Yaeyama region 100 mm

Weather for today, the 6th (Wednesday): Clouds dominate from Kanto to the Pacific Ocean side, making it a good day for going out in northern Japan and the Sea of Japan side.

2026/05/06 06:13

Today, the 6th (Wednesday), the last day of the holidays, the high pressure system that brought sunny skies yesterday (5th) will move east of Japan. Meanwhile, a front is expected to extend from the Nansei Islands to the south of Japan.



It will be sunny and blue skies will spread across northern Japan. Temperatures will rise, and some places in Tohoku will experience summer days. It looks like it will be unseasonably warm.
On the Japan Sea side of Hokkaido, westerly winds are strong, so you need to be careful of strong winds especially in coastal areas.

There are many sunny places in Hokuriku and the Sea of Japan side of western Japan, so it looks like it will be a sunny day to enjoy going out. Many places are comfortable during the day, but there is a large difference in temperature between morning and evening, so please dress accordingly.

From the Kanto region to the west of the Pacific Ocean, the sky will be dominated by clouds due to the influence of humid air. There is a possibility of rain showers, so it's a good idea to bring a foldable umbrella with you when you go out.

The rainy season will continue in the Nansei Islands. The rain will become heavier in the morning, and there is a risk of very heavy rain and thunderstorms. Please be careful of landslides, flooding of low-lying areas, and rising river waters.

Weather for tomorrow 6th: Honshu is a perfect day for tourists, a front is gradually approaching on the Pacific side

2026/05/05 12:35

Today, the 5th, blue skies are spreading around Honshu, but tomorrow, the 6th, the area will continue to be covered in high pressure, and it is expected to be sunny over a wide area. It looks like it's going to be a day where you can feel the warmth of the sunlight. For the second half of Golden Week, we can expect mild weather that will make it easier to plan outings and excursions.



There are many sunny weather marks in the second half of the week, but the weather in the Pacific coast area is actually likely to be unpredictable.
Looking at the Himawari meteorological satellite, a rainy season front extends east to west over the southern ocean. There are signs that this front will slowly move northward from tomorrow onwards. It will be a little while before the front hits Honshu, but as moist air tends to flow in mainly from the Pacific side, clouds may spread more easily in some areas.



The area of particular attention is the Pacific coast. In coastal areas from the Kanto region to the Tokai region, Kinki, Shikoku, and Kyushu, clouds will become thicker in the afternoon due to the influence of moist air flowing toward the front, and there is a possibility of rain in some places. Although the rain is localized and it is unlikely to be a full-fledged rain that continues for a long time, it is safe to have a folding umbrella when going out.





Southern Kyushu is close to the front, so the period of rain is expected to be a little longer. Particularly in parts of Kagoshima Prefecture, there is a possibility that the rain may become a little heavier as the front approaches. At this time of year, just before the start of the rainy season, even a slight change in the position of the front can make a big difference in the weather, so please check the latest weather information using a rain cloud radar.

Tomorrow, the 6th, looks like it will be a day with big differences in weather depending on the region. If you are planning to go on a vacation or go out, it is a good idea to check the pinpoint forecast for your destination and prepare for changes in the weather.

Be careful of strong winds mainly in the Tohoku region from today 4th to tomorrow 5th.

2026/05/04 15:34

Today, the 4th (Monday/Greenery Day), winds are increasing in various places due to the influence of low pressure and fronts moving near northern Japan. Even if the weather improves until tomorrow the 5th (Tuesday/Children's Day), please be careful of strong winds and storms.



Today, the 4th (Monday), a low pressure system with a front is near Hokkaido and is moving northeast. This low-pressure system is expected to develop and move through the Hokkaido region, reaching the waters near the Chishima Islands.
This low pressure system is causing strong winds in many places.

Today, the 4th (Monday), the maximum instantaneous wind speed was 28.5 m/s at 6:04 am in Chiba, Chuo Ward, Chiba City, 27.5 m/s at 0:05 am at Cape Muroto, Muroto City, Kochi Prefecture, and 26.9 m/s at 5:13 am in Gotemba, Gotemba City, Shizuoka Prefecture.



After this, even if the low pressure system or front passes, there will be a large pressure gradient between it and the high pressure system moving east from near the East China Sea, and strong winds are expected to continue in many places.
Even if the weather improves, please be careful of the increasing wind.



As of 3:00 p.m. today, Monday, April 4, a storm warning has been issued for Sanyakamikita, Aomori Prefecture, and eastern Miyagi Prefecture.
On the Pacific side of Tohoku, extremely strong winds are expected to blow from the west due to the influence of a developing low pressure system. Please be on guard for strong winds from the west from the evening until late at night today, the 4th (Monday).
If the low-pressure system develops more than expected or if the gradient of the atmospheric pressure becomes large, there is a possibility of warning-level winds from the west even on the Sea of Japan side of the northeastern Japan.

[Wind forecast]
Maximum wind speed (maximum instantaneous wind speed) expected on the 4th
Tohoku Sea of Japan side Sea 18 meters (30 meters)
Tohoku Sea of Japan side Land 15 meters (30 meters)
Tohoku Pacific side Sea 20 meters (30 meters)
Tohoku Pacific side Sea 18 meters (30 meters)
Tohoku Pacific side Sea 18 meters (30 meters)

Be careful of strong winds and high waves even after the low pressure passes

2026/05/04 13:05

A low pressure system is moving northeast near the Oshima Peninsula, and this is causing rain in Hokkaido and the Sea of Japan side of eastern Japan. The weather is improving in other areas, but although the weather is becoming more sunny, sea and wind conditions remain unstable, so caution is still required.
A storm warning has been issued for parts of the Pacific side of northern Japan.

The low pressure system will be sandwiched between the high pressure system to the east of Japan and the high pressure system extending from the continent, and the gradient of the atmospheric pressure is expected to increase.
The southerly wind has already strengthened during the day on the 4th (Monday), but it is expected to change to the northerly wind from the evening. Strong winds are expected to continue, and caution should be taken to avoid rising waves and the impact on transportation.



Currently, a wave warning has been issued for eastern Kanagawa Prefecture. As strong winds continue in other areas, there is a risk of getting caught in unexpected high waves if you get too close to the shore. Please be careful near the coast.





If you are planning to go outdoors during the holidays, please check the status of advisories and warnings frequently and avoid approaching dangerous areas. Please continue to check the latest weather information.