Weather today, Saturday, the 5th: Weather in western Japan is sunny and the heat continues; East to northern Japan is cloudy

2025/07/05 06:15

Today, Saturday, the 5th, the sun will reach western Japan, which is covered with high pressure, so we need to be vigilant against the extreme heat. Clouds are likely to spread due to the influence of atmospheric pressure in eastern to northern Japan, so be careful of showers.



In Hokkaido, there are probably many places where sunlight reaches it. The temperature will continue to be higher than normal and will be humid, so please be sure to stay hydrated frequently.


There will be some places in Tohoku where rain will fall, mainly in the morning. In the south, there are areas where showers will occur in the afternoon, so it's safe to have a folding umbrella.


In eastern Japan, clouds are likely to spread, and the sky is sometimes sunny.
In the afternoon, rain clouds develop locally inland and along the mountains, so those who go to leisure activities in the mountains should be careful of changes in the sky.


Western Japan and Okinawa will be sunny and severe heat will continue.
It is expected to be extremely hot days in various places exceeding 35 C. When you're out and about, be sure to drink plenty of hydration and salt, and take thorough measures against heatstroke. Also, be careful of heat stroke indoors, such as air conditioning indoors.
In Okinawa, you should be careful of sudden thunderstorms.

Typhoon No. 4 (Danus) may affect Okinawa around next week

2025/07/05 05:47

Today, July 5th, at 3am, a tropical cyclone developing in the South China Sea became Typhoon No. 4 (Danus). Typhoon No. 3 is located to the east of Japan, and two typhoons exist around Japan.



Typhoon No. 4, as of 3am today, the 5th, is in the South China Sea and is almost stagnant.

#Typhoon No. 4: 3am on the 5th (Sat)
====
Center location: South China Sea
Movement: Almost stagnant
Center pressure: 996 hPa
Maximum wind speed: 18 m/s (near the center)
Maximum instantaneous wind speed: 25 m/s
===

In the future, Typhoon No. 4 is expected to move north from the Taiwan Strait to the East China Sea, developing slightly around the 8th.
It is expected that most of the East China Sea will stagnate from the 8th onwards, and in the Okinawa region, moist air from typhoons will flow in easily, and the rain may increase. Also, waves may increase along the coast, so please be careful of future typhoon information.



#Typhoon No. 3 Saturday, 5th, 3am
====
Center location: East Japan
Movement: North Slow
Center pressure: 996 hPa
Maximum wind speed: 20 m/s (near the center)
Maximum instantaneous wind speed: 30 m/s
===

Typhoon No. 3 is expected to continue moving northward east Japan after this. As the country moves far from Japan, it is expected that it will have a small impact on Japan.

[Towards double typhoon] Will "Typhoon No. 4" occur by tomorrow morning Beware of future trends such as Okinawa.

2025/07/04 12:19

Today, July 4th (Friday) at 9 AM, it was announced that the tropical depression in the South China Sea is expected to develop into a typhoon within the next 24 hours.

If a typhoon occurs next, it will be "Typhoon No. 4."

As of 9am on Friday the 4th, the
tropical cyclone is slowly moving westward through the South China Sea, with a central pressure of 1002hPa, a maximum wind speed near the center of
is 15m/s, and a maximum instantaneous wind speed of 23m/s.



In the future, the power will be slightly stronger and a typhoon will develop by the morning of the 5th (Saturday), and
We will slowly approach the Sakishima Islands in Okinawa towards the end of the week.

In the first half of next week, typhoons that have changed from tropical cyclones in the East China Sea are expected to slow down, and
The effects of rain, wind and waves may last for a long time in the Okinawa region.


Today, the Okinawa region will need to be very careful about the trends in typhoons that change from tropical cyclones.



#Typhoon season has entered#

Currently, Typhoon No. 3 (Moon) is moving north on the sea east of Chichijima.

Typhoon No. 3 has no direct impact on Honshu, but
Typhoon No. 4, which is expected to occur next, could affect Okinawa and other places.
It is expected that a double typhoon will start in July, and the typhoon season is finally underway.

If we look at the number of typhoons that occur in normal years, it has been increasing since July, and around October, 3-6 typhoons occur every month.

This year, as the Pacific High Pressure Forces are prone to moving north in the summer,
We expect typhoons will likely move north along the edge of the Pacific High Pressure.

Even if the typhoon is far away and there is no direct effect, the warm, humid air from the typhoon flows in, causing the air to be unstable.


In particular, on the Pacific side of western Japan, there will likely be an indirect impact of the typhoon from mid-next week, so please be careful of sudden changes in the weather, such as sudden heavy rain or lightning strikes.

New typhoon eggs will appear; "Typhoon No. 4" will occur by tomorrow morning; beware of trends in Okinawa and other areas [Tropical cyclone information]

2025/07/04 11:12

Today, Friday, July 4th, at 9am, the Japan Meteorological Agency announced

/The tropical cyclone in the South China Sea is expected to develop into a typhoon within the next 24 hours.


If a typhoon occurs next, it will be "Typhoon No. 4."

As of 9am on Friday, July 4th, the
Tropical cyclone is slowly moving westward through the South China Sea, with a central pressure of 1002hPa, a maximum wind speed near the center of
is 15m/s, and a maximum instantaneous wind speed of 23m/s.



In the future, the power will be slightly stronger and a typhoon will develop by the morning of the 5th (Saturday), and
We will slowly approach the Sakishima Islands in Okinawa towards the end of the week.

In the first half of next week, typhoons that have changed from tropical cyclones in the East China Sea are expected to slow down, and
The effects of rain, wind and waves may last for a long time in the Okinawa region.


Today, the Okinawa region will need to be very careful about the trends in typhoons that change from tropical cyclones.



#Typhoon season has entered#

Currently, Typhoon No. 3 (Moon) is moving north in the waters near Ogasawara.

Typhoon No. 3 will not have a direct impact on Honshu, but
typhoon season will begin from autumn onwards.

If we look at the number of typhoons that occur in normal years, it has been increasing since July, and around October, 3-5 typhoons occur every month.

This year, as the Pacific High Pressure Forces are prone to moving north in the summer,
We expect typhoons will likely move north along the edge of the Pacific High Pressure.

Even if the typhoon is far away and there is no direct effect, the warm, humid air from the typhoon flows into the air, causing the atmosphere to be unstable.


In particular, on the Pacific side of western Japan, there will likely be an indirect impact of the typhoon from mid-next week, so please be careful of sudden changes in the weather, such as sudden heavy rain or lightning strikes.

Today (4th), the atmosphere will be unstable in various places, and be careful of tropical cyclones.

2025/07/04 06:40

There is a high pressure system near Kyushu, and it is almost stagnant.
On the other hand, the Sea of Japan is a valley of atmospheric pressure.

Today, Northern Japan is expected to have cloudy and rainy weather in the morning, due to the effects of moist air and cold air above, and there will be some areas where it will fall violently with thunder.

Also, in eastern and western Japan, there are many sunny spots in the morning, but in the afternoon, the atmosphere becomes unstable due to the effects of humid air and solar radiation, and there are likely some places that cause rain or thunderstorms.



[Rain forecast]
The 24-hour precipitation expected from 6am on the 4th to 6am on the 5th is a high place, and
#Hokkaido
+Northern part of the Sea of Japan side: 80mm
+South part of the Sea of Japan side: 100mm
+Western part of the Pacific side: 100mm
+East part of the Pacific side: 80mm
+Northern part of the Sea of Okhotsk side: 60mm
+South of the Sea of Okhotsk side: 60mm

#Tohoku region
+Tohoku Sea of Japan side: 100mm

/B#Kanto region
/B+Northern Kanto region: 100mm
/B#Kanto region
/B+North Kanto region: 100mm
/B+South Kanto region: 60mm
/B+Koshin region: 100mm
/B/BThere is a risk of heavy rain locally in other regions as well.
Beware of landslides, flooding of low land, flooding of rivers, lightning strikes and gusts of wind, hail, and
Beware of sudden, heavy rain.



In addition, tropical cyclones are occurring around the Philippines.
It will be stagnant for a while from now on, but it is expected that it will develop around the 10th
/Move into the East China Sea.
Please be careful of future weather information.

Typhoon No. 3 Ogasawara Atmospheric unstable; the weather around Honshu is on the rise, and the dangerous heat of overheating

2025/07/03 13:16

Weekly Weather Forecast
#Widely Air Condition Very Unstable Weather Changes - Warning-class heavy rain
#High Pressure Power Increases, Tropical Nights due to dangerous heat exceeding body temperature
#Typhoon No. 3 has occurred



#Widely Air Condition Very Unstable Weather Changes - Warning-class heavy rain
On Wednesday, yesterday, Hyogo Prefecture, Kyoto Prefecture, Tochigi Prefecture, Fukushima Prefecture, Miyagi Prefecture, and Yamagata Prefectures, and record-breaking heavy rain information was announced.
Tomorrow, the 5th (Saturday), we need to be vigilant against sudden, extremely severe thunderstorms, especially in the afternoon.
The high pressure system will stagnate near western Japan.
From Okinawa to Tohoku, the temperature will rise with clear weather and warm, humid air surrounding the high pressure, and the atmosphere is expected to become extremely unstable, especially in the afternoon.
Even in the sun, the weather will change dramatically, with localized, extremely heavy rain with lightning.
If the rain clouds stagnate, there is a risk of heavy rain at the level of an alarm.
Also, a low pressure system will advance to the Sea of Okhotsk, and cold air will pass over northern Japan tomorrow, Saturday the 5th.
There are some areas in Hokkaido that are raining, and the atmosphere is expected to become unstable due to the warm, humid air facing the low pressure system and the cold air above.
Please be careful as the rain may suddenly become more intense.





#Pacific high pressure increases in power Tropical nights due to the dangerous heat of exceeding body temperature
After that, the Pacific high pressure will gradually increase in power.
From Sunday the 6th to Monday the 7th, the Pacific High Pressure is expected to protrude near western Japan, and from Tuesday the 8th to Thursday the 10th, it is expected to protrude into the Sea of Japan.
At this time, there may be some places where the end of the rainy season will be announced.
There will be some places where the summer sun will shine, and there will be some hot days and tropical nights every day.
There is a high temperature reaching 36 C, mainly in western Japan and Tokai, and there are some areas where the temperature is likely to be dangerous, exceeding the body temperature.



#Typhoon No. 3 has emerged
Today, Thursday the 3rd, at 3am, a tropical cyclone developing in the waters near Ogasawara became Typhoon No. 3 (Moon).
In the Ogasawara Islands, the atmosphere condition is expected to become unstable due to the effects of warm, humid air around the typhoon until tomorrow, the 4th (Friday).
Beware of sudden heavy rain, lightning strikes, and gusts of wind.

Heat stroke warning alert for July 3rd Announcement in 17 regions, mainly in western Japan

2025/07/03 08:52

The Ministry of the Environment has issued a heat stroke warning alert for today, Thursday, July 3rd, to 17 western Japan regions, including Hyogo, Hiroshima, and Fukuoka.


In areas where a heatstroke warning alert has been issued, temperatures are significantly rising, and there is a high risk of heatstroke. As this could lead to health damage, be sure to not only replenish your water and salt content, but also avoid direct sunlight, and use air conditioning such as air conditioners indoors to actively take measures against heat stroke.
In particular, elderly people and infants are prone to heat stroke, so be careful and take measures against heat stroke, such as replenishing water and salt, and using air conditioning.

[Heatstroke warning alert announcement area]
Hyogo Prefecture Hiroshima Prefecture Shimane Prefecture Tottori Prefecture Tottori Prefecture Tokushima Prefecture Kagawa Prefecture Ehime Prefecture Kochi Prefecture Yamaguchi Prefecture Fukuoka Prefecture Oita Prefecture Nagasaki Prefecture Saga Prefecture Kumamoto Prefecture Miyazaki Prefecture Kagoshima Prefecture (excluding Amami Region) Okinawa (Yaeyama Region)

[What is a Heatstroke warning alert]
A Heatstroke warning alert is information announced by the Ministry of the Environment that calls for heatstroke prevention. In the areas announced, significantly higher temperatures could lead to damage to human health due to heat stroke. Don't think of it as someone else's problem, prioritize protecting yourself from the heat.

High temperatures nationwide: Announcement of the end of the rainy season in June in western Japan; Summary of weather and temperatures (June 22 - June 28, 2025)

2025/07/03 06:49

This is a summary of the weather during this period (June 22nd to June 28th).

#Summary of weather for the current period (June 22nd to June 28th)
The average temperature was higher than normal nationwide due to the warm air surrounding Honshu. In particular, the trend was significantly higher than normal in northern and eastern Japan, with temperatures higher than normal in Tokyo, Sendai, Sapporo, Asahikawa and Kushiro, temperatures higher than normal, and temperatures higher than normal in Muroran and Abashiri temperatures higher than 5-6 C, which was significantly higher.


Pressure precipitation was more susceptible to the rainy season front and low pressure, mainly on the Sea of Japan side, and more rainfall than normal, mainly on the Sea of Japan side of the north to western Japan. On the other hand, on the Pacific side of the west and eastern Japan, there were many cloudy and rainy days due to the influence of moist air, but precipitation was lower than normal.

Sunlight hours were lower than normal, mainly in the Tohoku Sea of Japan side, Hokuriku, and Tokai, which were easily affected by the rainy season front and low pressure system. On the other hand, on the Pacific side, there was a lot of sunlight in Hokkaido and Kanto. Western Japan was cloudy and rainy due to the rainy season front, but the period was covered by high pressure during the second half of the period. Many places had more sunlight than usual.



[About the weather during this period]
#Characteristics of atmospheric pressure layout
On the 22nd, the rainy season front spreads north to western Japan, through the East China Sea, and gradually moved south from western Japan to eastern Japan. In the waters near Ogasawara, low-pressure areas have become tropical cyclones. On the 23rd, the rainy season front stagnated from north to western Japan and through the East China Sea through the Hanachu. In the East China Sea, a low pressure system emerged on the front and moved eastward. Typhoon No. 2 broke out in the waters near Ogasawara around 9am. On the 24th, the rainy season front stagnated from Chinachu to east of Japan, and the low pressure system on the front moved northeast. Typhoon No. 2 travels north through the Izu Islands with strong winds. On the 25th, a low pressure system passed through the Sea of Japan, with a warm front passing through northern Tohoku and a cold front passing through western Japan. Typhoon No. 2 has been transformed into a tropical cyclone near the Izu Islands. On the 26th, a low pressure system accompanied by a front flew east through the Sea of Japan. The tropical cyclone gradually became obscure. On the 27th and 28th, the low pressure system proceeded northeasterly through the waters near the Kuril Islands, and the low pressure system and front gradually moved away from near Japan. High pressure gradually began to rise from the west, and low pressure areas stagnated over the East Sea of the Philippines.

#Precture
On the 22nd, due to the rainy season front, rain began mainly on the Sea of Japan side of the north to western Japan. Heavy rain of 33.0mm/h was observed in Itsuhara, Nagasaki Prefecture, and heavy rain was also seen in parts of Hokuriku. On the 23rd, heavy rain was 100mm per hour near Niimi City, Okayama Prefecture, and information on record-breaking short-term heavy rain was announced nationwide, the first in the year. On the 24th, extremely heavy rain began in the Tokai region and the Kii Peninsula. A total of 76.0mm/h was observed in Yuasa Town, Wakayama Prefecture. On the 25th, heavy rain began in the west and eastern Japan due to the effects of the fronts associated with the cyclone and the warm and humid air associated with the tropical cyclone. In Kamiishizu, Ogaki City, Gifu Prefecture, extremely heavy rain at 68.0mm/h, the number one in history, was observed. On the 26th, a band-shaped rain cloud accompanied by the cold front passed westward around Honshu. Heavy rain in Gojo City, Nara Prefecture was hit by a daily rainfall of 120.0mm. On the 27th, the end of the rainy season was announced in southern and northern Kyushu, Chugoku, Shikoku, and Kinki. The end of the rainy season during June is the first time in statistics history. In Hokkaido, record-breaking short-term heavy rain information has been announced in northern Urahoro Town and Ikeda Town. On the 28th, some heavy rain fell on the Sakishima Islands in Okinawa, and there was no noticeable precipitation around Honshu.

#Temperature
On the 22nd, the heat is almost over reaching its temperature in Kanto, Koshin, southern Tohoku, and Hokuriku. Itoigawa, Niigata Prefecture, was a hot day of 36.1 C, and the number one spot in June was updated. On the 23rd, the heat eased in western Japan due to rain, and the heat continued in Kanto. On a hot day in Otsuki City, Yamanashi Prefecture and Kuki City, Saitama Prefecture. It was a tropical night in central Tokyo. On the 24th, temperatures rose in the heart of northern Japan, which was covered in high pressure. Tsubetsu Town, Hokkaido, recorded a temperature of 34.4 degrees Celsius, which was hotter than Okinawa. On the 25th, the temperature reached high temperatures, mainly on the Sea of Japan side of northern Japan and western Japan, and Kitami City recorded a temperature of 34.9 C. On the 26th, temperatures rose in Kanto, China, Kyushu and other places where the impact of the rainy season front was small. The temperature rose to 32.9 C in central Tokyo. It is in Kitami City (34.0c) and Asahikawa City (31.0c) in Hokkaido, and other places are located on the midsummer day. On the 27th, the sun was widely exposed to the west and eastern Japan, and on extremely hot days in Kamimon, Miyazaki Prefecture (35.1c), Ainancho, Ehime Prefecture (35.0c), and Kofu (35.0c). On the 28th, the number of midsummer days in central Tokyo in June will be on the 11th. Due to the effects of cool air, the temperature on the Sea of Okhotsk side of Hokkaido was 16.6 C in Abashiri, reaching the same temperature as late May.

Typhoon No. 3 (Moon) occurs; be careful of strong winds, high waves, sudden rain and thunderstorms in the Ogasawara Islands.

2025/07/03 05:50

Today, the 3rd (Wednesday), around 3am, a tropical cyclone developing in the waters near the Ogasawara Islands became Typhoon No. 3.

#Typhoon No. 3 - Wednesday, 3:00 am
====
Center location: Ogasawara waters
Moving speed: Northwest, 20 km/h
Center pressure: 1002 hPa
Maximum wind speed: 18 m/s (near the center)
====



Typhoon No. 3 is already approaching the Ogasawara Islands, and is expected to head northwards over the sea east of the Ogasawara Islands in the future. In the Ogasawara Islands, you will need to be careful of strong winds and high waves with swells, sudden rain and thunderstorms up to tomorrow, the 4th (Thursday).



Current forecasts show that the chances of landing in Honshu are low, and it is unlikely to occur with a storm with a wind speed of 25m/s or more. However, the large size of the forecast circle that indicates the expected course for the typhoon is large, resulting in greater uncertainty in predicting the course. Please be aware of the latest typhoon information that will be updated in the future.

Sea surface temperature in the seas near Japan is higher than normal in the central Japan Sea. Summary of the oceans (June 22-28, 2025)

2025/07/02 12:57

Sea surface temperatures in the waters near Japan continue to be in areas higher than normal.
In particular, on the continental side of the central Japan Sea, the temperature was up to 5 C higher than normal.
Below is a summary of the oceans (June 22-28, 2025)



#Pressure arrangement and waves
On the 22nd-24th, the rainy season front extending from the Sea of Japan to northern Japan gradually moved south, stagnating near Honshu.
High pressure in the far east of Japan protrudes south to the south of Japan, increasing the slope of pressure between the front line and the front.
Waves have risen slightly in the east of Japan.
Tropical cyclones in the waters near Ogasawara developed into Typhoon No. 2 on the 23rd.
Press northwest with strong winds.
The waves rose in the waters near Ogasawara, and it broke down on the 24th.
On the 25th, Typhoon No. 2 became a tropical cyclone, moving north south of Hachijojima.
On the 26th, we reached south of Kanto and headed northeast.
Waves have risen in the waters near the Izu Islands and off the coast of Kanto.
On the 27th and 28th, the front stretched out to the Pacific side from a low pressure system that proceeded northeasterly in the east of Hokkaido, and waves rose in the east of Japan.



#Sea surface temperature
The sea surface temperature in the Japanese seas is higher than normal in the northern and central parts, and the seas on the continent have expanded considerably.
On the central continental side, the temperature was up to 5 C higher than normal.
The western part is on average.
The East China Sea and the Pacific Ocean have expanded to include higher than normal waters.
It is much higher than normal offshore Shiosaki, where the Kuroshio Current is docked.
The off Sanriku area continued to be significantly higher than normal, with a maximum of 4 C higher.
/The southern coast of Hokkaido and the southern Sea of Okhotsk are also in considerable heights
/
In the southern Sea of Okhotsk, the temperature has increased by up to 4 C.