Summary of weather and temperature (November 16th to November 22nd) Winter-type atmospheric pressure distribution - Severe cold across the country - Over 100 cm of snowfall in Sukayu, Aomori Prefecture

2025/11/27 21:08

This is a summary of the weather and temperature from November 16th to November 22nd, 2025.

[About this period's weather]
#Characteristics of atmospheric pressure distribution
On the 16th, the vicinity of Honshu was widely covered by a mobile anticyclone. A low pressure area near northeastern China is moving eastward. Around 9:00 a.m., a low pressure system accompanied by a front formed north of Vladivostok and moved east-northeast while developing. On the 17th, a rapidly developing low pressure system moved east-northeast across the Sea of Okhotsk. A cold front extending from a low pressure system passes through northern and western Japan. From the afternoon onward, the atmospheric pressure shifted to a winter-like pattern. On the 18th, a developed low pressure system moved eastward through the Sea of Okhotsk. There is a strong winter-like atmospheric pressure pattern near Japan. On the 19th, high pressure rose from the continent, and the winter-like pressure pattern around Honshu gradually loosened. On the 20th, a low pressure system accompanied by a front moved east-northeast near the Mamiya Strait. Another low pressure system moved eastward south of Kanto. On the 21st, a low-pressure system accompanied by a front passed over Sakhalin and moved into the Sea of Okhotsk. A cold front extending from a low pressure system passes through northern and eastern Japan. A winter-like atmospheric pressure pattern was observed mainly in northern Japan. On the 22nd, a high-pressure system centered in central China stretched out near Honshu. In northern Japan, the winter-like atmospheric pressure pattern has gradually loosened.


#Precipitation
On the 16th, the area around Honshu entered a high-pressure zone, and there was almost no precipitation during the day, but over the Izu Islands, rain clouds developed locally due to the moist air moving to the east, and heavy rain was observed. On the 17th, rain became heavier in northern Japan and Hokuriku, where the front was passing, until around noon. In the afternoon, the cold air gradually moves south. The rain turned to snow, and the snow became heavier in Hokkaido at night. On the 18th, intermittent heavy snow fell in northern Japan. In Sukayu, Aomori Prefecture, snow depth exceeded 100 cm and a heavy snow warning was issued. The Kanto region is experiencing showers due to a trough in atmospheric pressure and cold air in the upper atmosphere. On the 19th, it rained mainly on the Sea of Japan side from northern Japan to the San'in area, and there was snow in places along the mountains in Tohoku and Hokuriku. As the afternoon progresses, the winter-like atmospheric pressure pattern gradually loosens, and the area of rain and snow shrinks. On the 20th, with the approach of a low pressure system and front, it began to rain on the Sea of Japan side of northern Japan, and the rain was somewhat heavy in Hokkaido. On the 21st, snow and rain fell from the Sea of Japan side of northern Japan to the Hokuriku region, with localized precipitation becoming heavier. On the 22nd, rain and snow fell mainly from the Sea of Japan side of northern Japan to Hokuriku, accompanied by a cold air in the sky. The rain on the Sea of Japan side subsided by the afternoon.


#Temperature
On the 16th, a high pressure system covered the area, and the sunlight reached the country, bringing temperatures to about normal or slightly higher than normal. Osaka recorded a temperature of 20.9c, similar to late October. On the 17th, warm air flowed in from the south toward a front and low pressure system, resulting in higher-than-normal temperatures across the country, with many places from western Japan to the southern part of Tohoku exceeding 20 degrees Celsius. On the 18th, a strong cold air in the sky moved southward, and the cold became stronger across the country, with temperatures in many places reaching the same level as December. On the 19th, the morning was extremely cold due to the influence of cold air in the upper atmosphere, and some places experienced the coldest weather of the season. The morning minimum temperature in central Tokyo was 5.1c, a new low for the season. During the day on the 20th, temperatures across the country reached temperatures typical of this time of year. On the other hand, in Naha, where northerly winds blew, the temperature reached 22.9 degrees Celsius, similar to early December. On the morning of the 21st, the weather became clear west of the Kanto region, and radiation cooling became stronger, making the weather even colder. The temperature in central Tokyo is on par with the 5.1c recorded on the 19th, the coldest temperature of the season. In the morning of the 22nd, the inland areas of western and eastern Japan cooled down due to radiation cooling, and in the daytime, sunlight reached the area and temperatures rose. The daily temperature range in Fuchu City, Tokyo reached 15.7c.



# Weather summary for this period (November 16th to November 22nd)
The average temperature becomes a winter-like pressure pattern in the first half and second half of the period, and cold air moves southward. There were many days when cold air prevailed, and temperatures were below normal nationwide. Additionally, the area around Honshu is often covered in high pressure, and the effects of radiation cooling have made mornings even colder, with temperatures in central Tokyo reaching their lowest levels this season.
Precipitation was in a winter-like atmospheric pressure pattern, with some places on the Sea of Japan side of northern Japan and the Hokuriku region having higher than normal precipitation. On the other hand, the Pacific side of northern Japan, the Pacific side of eastern Japan, and western Japan were much lower than normal.
Due to the effects of cold air in the upper atmosphere, there were some locations on the Sea of Japan side of northern Japan where the sunshine hours were less than normal, but there were many locations from eastern to western Japan where the sunshine hours were at or above normal.

[Forecast of flying yellow dust] Will it fly to western Japan tonight and eastern Japan tomorrow morning

2025/11/27 12:08

Yellow dust kicked up in the Gobi Desert is being blown away by strong westerly winds and approaching Japan.



Yellow sand will begin to fly to western Japan on the night of today, the 27th (Thursday),
, and when the date changes to tomorrow, the 28th (Friday),
yellow sand is expected to start flying to western Japan and Hokuriku.



It is expected that it will spread widely into the Kanto and Tohoku regions on the morning of the 28th (Thursday), and there is a risk that the visibility will be poor due to the influence of
yellow dust.


The sky may become hazy, and
yellow sand may adhere to cars and laundry outdoors.

Also, please be aware that if the visibility is less than 5 kilometers,
aircraft and other traffic may be affected.

*Visibility is the distance that can be seen in the horizontal direction.

The aftermath of the Kuroshio meander continues, with sea surface temperatures lower than normal near the Boso Peninsula [Ocean Summary November 16-22, 2025]

2025/11/27 11:23

The Japan Meteorological Agency and Japan Coast Guard have announced that the Kuroshio Current Meander will end in April 2025 (announced on August 29, 2025).

According to JAMSTEC's ``Kuroshio Watch,''
the aftermath of the Kuroshio meander continues.
A meander occurs as the vortex that was torn off from the Kuroshio is absorbed, and
the meander is about to flow away to the east.
It is said that the Kuroshio current is separated from the Boso Peninsula due to the meandering.



Sea surface temperatures are lower than normal near the Boso Peninsula, where the Kuroshio Current leaves the shore.

Below is the ocean summary from November 16th to 22nd, 2025.



#Pressure distribution and waves
On the 16th, the waves in the waters around Japan were calm, covered by a mobile anticyclone.

On the 17th, a low pressure system accompanied by a front moved eastward near Sakhalin, and a front extending from the low pressure system passed through Honshu.
At night, wave heights of more than 4 meters occurred over a wide area of Japanese waters.

On the 18th, a developing low pressure system moved toward the Sea of Okhotsk, and
the Sea of Okhotsk became a major storm with wave heights of 6 meters.

On the 19th and 20th, a high pressure system came from the west,
and the high waves in the waters surrounding Japan subsided.

On the 21st, a front passed over Honshu, and the winds from the north became stronger.
Waves were high in Japanese waters, with wave heights of around 3m.

On the 22nd, high waves remained off the coast of Sanriku, but an anticyclone extended from the continent and the waves became calm.




#Sea surface temperature

Sea surface temperatures in Japanese waters continue to be lower than normal along the coast of Hokkaido.

The central and western parts of the Sea of Japan continue to experience sea levels that are at or above normal.
The East China Sea remained at or above normal.

On the Pacific side, conditions remained below normal in the south of Japan, and
waters below normal prevailed off the coast of the Tokai region and near the Izu Islands.
The temperature in the east of Japan was significantly higher than normal, with temperatures up to 3 C higher.

Off the coast of Sanriku, areas with lower than normal temperatures have expanded.
Off the southeastern coast of Hokkaido, the sea level is considerably lower than normal, and
The Sea of Okhotsk continues to be at normal levels.

Front passing, atmospheric instability. Be careful of lightning, tornadoes, strong gusts, and sudden heavy rain!

2025/11/27 09:44

Front passing, atmospheric instability. Be careful of lightning, tornadoes, strong gusts, and sudden heavy rain!

There is a high pressure system near Primorye and Tohoku that is moving eastward.
On the other hand, there is a low pressure system in the northeastern part of China, the western part of the Sea of Japan, and the western part of the Korean Peninsula, and it is moving northeast and east.

Currently, there are some places where there are a lot of clouds, but there are many places where it is sunny.

Today, a low pressure system will move northeast across the Sea of Japan, and a front will pass from western Japan to northern Japan until the 28th.
Also, on Friday the 28th, cold air with temperatures below -27 degrees is expected to flow approximately 5,500 meters above northern Japan.



Due to the effects of warm, humid air flowing toward the low pressure system and front, and cold air above, the atmospheric conditions will be extremely unstable in some places from western to northern Japan from noon on the 27th (Thursday) to the 28th (Friday).
From Okinawa to the Tokai region, it will be sunny in some places, but rain and thunderstorms are expected in places.
There will be more rain and thunderstorms on the night of the 27th (Thursday) from Kanto and Hokuriku to northern Japan, and there will be snow in some places in Hokkaido.



From western Japan to northern Japan, please be careful of lightning, tornadoes, severe gusts, and sudden heavy rain from before noon on the 27th (Thursday) to the 28th (Friday).
If there are signs of a developing cumulonimbus cloud approaching, please take every precaution to ensure your safety, such as moving inside a building.
There is also a risk of hail, so please be careful when managing crops and agricultural facilities.

Rain due to low pressure and front; Hokkaido storm warning; unseasonal yellow sand flying again after front passes [Weekly weather forecast]

2025/11/26 12:19

#Rain due to low pressure and front; Hokkaido is on alert for storms; fear of severe storms
#After the front passes, unseasonable yellow dust is flying again
#Starts in December Gradually the pressure distribution is high in the west and low in the east
#Due to the trend of high temperatures, December gradually returns to normal levels



#Rain due to low pressure and front Hokkaido is on alert for storms There is also a risk of heavy storms.A low pressure system will move from the Korean Peninsula through the Sea of Japan to the Sakhalin area from tomorrow the 27th (Thursday) to the 28th (Friday).
Also, the front is expected to pass through western and northern Japan.
Atmospheric conditions will be unstable due to the effects of warm, humid air heading towards a low pressure front and cold air above.
Tomorrow, the 27th (Thursday), it is expected that there will be some rain in Okinawa, which is on the edge of a high pressure system.
With the eastward movement of the low pressure system and the passage of the front, the weather is going downhill from the west.
It will start raining in Kyushu in the morning, and in the afternoon there will be more rain in western Japan.
It will begin to rain in some places in the Tokai and Hokkaido areas from the evening, and it is expected to start raining in more places north of the Kanto region by late evening.
There will be places in Hokkaido where there will be snow.
Heavy rain with localized thunderstorms is expected, mainly in western Japan and Hokuriku.

The next day, on the 28th (Friday), there will be rain in places from northern Kinki to the Sea of Japan side of Northeastern Japan, and due to the influence of a pressure trough in the Tokai region, rain clouds will gather around Shizuoka Prefecture.
Hokkaido is expected to have snow in some places in central Hokkaido.
There will be places on the Pacific side of Hokkaido where the rain will gradually return to sunshine.



A low-pressure system is expected to move toward the Sea of Okhotsk from the 28th (Friday) to the 29th (Saturday) tomorrow, causing rough weather in Hokkaido.
A strong wind is blowing on the Sea of Japan side of Hokkaido, and there is a possibility that it will become a warning-level storm.
Also, depending on the degree of development of the low pressure system, there is a risk of severe storms, which may affect transportation.
Please pay attention to the latest information.

#After the front passes, unseasonable yellow sand is expected to fly over Japan
After the front passes, yellow sand is expected to fly over Japan from the night of the 27th (Thursday) tomorrow to the 28th (Friday).
Kosa often flies in spring. The unseasonable yellow dust will continue to blow again from the 25th (Thursday) to the 26th (Wednesday).
Kosa is expected to hit Kyushu and China on the night of the 27th (Thursday), and over a wide area from Okinawa to Hokkaido on the 28th (Friday).



#Starts in December Gradually, the atmospheric pressure will shift to high in the west and low in the east
From December 2nd (Tuesday) to 3rd (Wednesday), the atmospheric pressure will be high in the west and low in the east, with the Pacific side expected to be sunny and dry, Hokuriku and southern Tohoku to experience rain, and northern Tohoku and Hokkaido to experience some snow.





#December will gradually return to normal due to the trend of high temperatures
Over the coming week, the flow of cold air will be weak, and there will be many days with pleasant and sunny weather.
However, the sunnier the day, the stronger the effect of radiation cooling, and the mornings and evenings are often cooler, so you need to be careful about the temperature difference throughout the day.
The trend towards high temperatures gradually returns to normal in December, allowing you to feel the progress of the season.

Today, the 26th, the atmospheric conditions are unstable on the Sea of ??Japan side from Tohoku to the Sanin area. Be careful of strong gusts that could cause lightning or tornadoes.

2025/11/26 07:48

Today, the 26th, a low pressure system will move over the eastern seaboard of Japan, creating a temporary winter-like pressure pattern around Honshu. Atmospheric conditions are expected to be unstable along the Japan Sea side from Tohoku to the San'in area due to the influence of cold air in the upper atmosphere.



Looking at the forecast for the probability of lightning strike at 9am today, the area around Hokuriku has a particularly high probability. Thunderclouds are likely to develop in the southern Tohoku region, northern Kinki region, and in the shadows of the mountains. Be careful of heavy rain that falls in a short period of time, lightning strikes, violent gusts of wind such as those caused by tornadoes, and hail.

The unstable atmosphere is expected to continue into the afternoon of today, the 26th. After the evening, the area of rain will narrow, and the weather will gradually improve in areas along the Sea of Japan.

Typhoon 27 "Koto" occurs near the Philippines, the third typhoon this November

2025/11/26 00:14

At around 9:00 pm on the 25th (Tuesday), Typhoon No. 27 occurred in the Sulu Sea near the Philippines.

This is the third typhoon to occur in November this year, exceeding the 2.2 typhoons that occur in November in a normal year. Additionally, the number of typhoons that will occur this year in 2025 will exceed the average number of typhoons, which is 25.1.

#Typhoon No. 27 25th (Tuesday) 9:00 pm
===================
Center position Sulu Sea
Movement speed West-northwest 15km/h
Central pressure 998hPa
Maximum wind speed 18m/s (near the center)
Maximum instantaneous wind speed 25m/s
=================



Typhoon No. 27 is expected to advance westward in the South China Sea as it continues to intensify, and will be accompanied by a storm area by around 21:00 on the 27th.

This typhoon has no direct impact on areas near Japan.

3-month forecast: There will be many winter-like cold days, snow on the Sea of ??Japan side is expected to be on par with normal years, and the Pacific side will be sunny and dry

2025/11/25 21:05

On the 25th (Tuesday), the Japan Meteorological Agency announced the latest 3-month forecast, which shows the weather outlook for the next 3 months.



Since conditions will be close to La Nina during the first half of the period, sea surface temperatures will be higher than normal in the western equatorial Pacific Ocean, and convective activity will be active mainly near the Philippines. Near the international date line in the equatorial Pacific Ocean and in the tropical Indian Ocean, cumulonimbus clouds are expected to be rare and convective activity to be inactive.
For this reason, upper-level westerly winds tend to meander northward over the Eurasian continent and meander southward near Japan, similar to normal years. The continental Siberian High, which brings strong cold air, will have periods when its overhang to the southeast becomes somewhat stronger.

From the above, the northerly seasonal winds are strong as they head towards the Philippines, and eastern Japan, the Pacific side of western Japan, and Okinawa/Amami are unlikely to be affected by low pressure. The Sea of Japan side of northern Japan is likely to be more susceptible to the effects of low-pressure systems, and winter-like pressure patterns are not expected to last long. On the other hand, there is likely to be a period when winter-like pressure patterns become stronger mainly in western Japan and Okinawa/Amami.



The average temperature over the next three months is likely to be at or above normal in northern Japan. From eastern Japan to western Japan, as well as Okinawa and Amami, the weather is expected to remain close to normal, with many cold days typical of winter.



Northern Japan will be affected by low pressure at times, so precipitation is expected to be around normal. In the middle of the period, around January, the number of cases will tend to be higher than normal. As cold air from the upper atmosphere tends to flow into western Japan, snowfall amounts along the Sea of Japan are expected to remain at normal levels in various regions.

However, the areas closer to the Pacific Ocean tend to have clearer weather and less precipitation, and especially around December, from the Pacific side of eastern Japan to western Japan, and Okinawa/Amami, it will be less than normal. The air tends to be drier in areas closer to the Pacific Ocean. Please be careful about your physical condition and handling sources of fire.

Today, tomorrow, and 27th to 28th, yellow sand is flying in. A messenger of spring. Unseasonable yellow sand is coming from mainland China to Japan.

2025/11/25 16:43

Yellow dust blown up by strong winds from places such as the Gobi Desert is carried by winds in the sky from North China to Central China, and by 2 p.m., it has spread as far as South Korea.
Even in South Korea, there are many places where the visibility (the distance you can see in the horizontal direction) is 5 to 10 kilometers.



After the low pressure system passes near Japan today, the 25th (Tuesday), westerly winds will become stronger, and yellow sand will blow into Japan tomorrow, the 26th (Wednesday).
Yellow dust is expected over a wide area from the Nansei Islands to western Japan.
There is a possibility that it will fly to parts of Hokuriku in the early morning of tomorrow 26th (Wednesday), and to parts of the Tokai region from early morning to dawn of tomorrow 26th (Wednesday).



Visibility is expected to be less than 10 kilometers, mainly from the Nansei Islands to western Japan, and in some places visibility is expected to be less than 5 kilometers.
This may have an impact depending on the region, such as getting dirty cars and laundry.
Also, please be aware that if the visibility is less than 5 kilometers, there is a risk of traffic problems.
If you have hay fever or respiratory illnesses, your symptoms may worsen, so please take all possible precautions.

Also, from the 27th (Thursday) to the 28th (Friday), a low-pressure front accompanied by a front will develop in the Sea of Japan and move northeast toward the Sakhalin area.
After this low-pressure system passes near Japan, yellow dust is expected to spread widely from the Nansei Islands to Hokkaido from the afternoon of the 27th (Thursday) to the 28th (Friday).
Please be sure to check the information on Kosa frequently this week.



Kosa is most often observed in spring (March to May).
This is because there is nothing to cover the ground in spring, and dust tends to fly around.
The ground is covered with plants in the summer and fall, and with snow and ice in the winter, suppressing the occurrence of yellow dust. However, this year, there was little rain in the outbreak area and dry conditions continued, so strong winds caused by low pressure systems tend to blow up yellow dust, making it easy for yellow dust to fly even at this time of year.

[Typhoon No. 27 to occur] A new typhoon will occur near the Philippines by tonight

2025/11/25 11:52

As of 9 a.m. today, November 25th (Tuesday), there is a tropical cyclone developing near Panay Island in the Philippines,
moving west at 30 km/hr.

Sea surface temperatures near the Philippines continue to be higher than normal, and the
tropical cyclone is expected to develop into a typhoon by tonight.

The next typhoon will be called ``Typhoon No. 27,''
making it the third typhoon to occur this month. (Number of occurrences in November is 2.2)



It is expected to continue to develop and move toward the South China Sea, and the central pressure is expected to drop to 985 hPa at 9 a.m. on the 27th (Thursday),
with a storm area.

After that, it will continue westward and is expected to reach Vietnam around the 30th (Sunday).

Although there is no direct impact on Japan,
warm and humid air around the typhoon will flow into the Sakishima Islands of Okinawa,
Please note that there is a possibility of rain and thunderstorms around the 27th (Thursday).