Early next week: Possibility of rough weather nationwide, with rain and winds getting stronger

2024/11/23 17:45

From Tuesday, the 26th to Wednesday, the 27th of next week, a low pressure system with a front will develop and move through the northeastern region of China, and a cold front extending from the low pressure system will pass through the Japanese archipelago. The weather will be deteriorating from the west.



Warm and humid air will flow from the south toward the low pressure system and front, and rain clouds are expected to develop locally. The rain will intensify as the front passes, and caution is required in Western Japan on the afternoon of Tuesday, the 26th, and in Northern and Eastern Japan on the morning of Wednesday, the 27th.



As a low pressure system is expected to develop, winds will strengthen, especially in coastal areas, and transportation may be affected, so you should be careful of the wind from the 26th (Tue) to the 27th (Wed).

On Saturday, the 23rd, streaky clouds over the Sea of ??Japan, snow in Hokkaido, and sudden rain and thunderstorms in Tohoku and Kyushu

2024/11/23 12:23

Today, the 23rd (Saturday) [Labor Thanksgiving Day], the atmospheric pressure around Japan is in a winter pattern. Looking at the clouds, there are streaky clouds over the Sea of Japan, which are common in winter, bringing snow and rain to the Sea of Japan side of the country.



The winter atmospheric pressure will continue in the afternoon. In Hokkaido, snow will fall widely on the Sea of Okhotsk side and the Sea of Japan side. The cold air that is the guideline for snow will be around northern Tohoku, and cold rain will fall on the plains on the Sea of Japan side from Tohoku to Kyushu, with the possibility of thunderstorms in some areas. Snow will fall along the mountains from Tohoku to Hokuriku. On the other hand, many areas on the Pacific side will be sunny, but the isobars will be crowded and the north wind will strengthen, making it a cold day. The expected maximum temperature is around 15 C in many places from eastern to western Japan, with Sapporo at 7 C, Akita at 10 C, and Niigata at 11 C, and areas on the Sea of Japan side are also likely to be lower than yesterday, Friday, the 22nd.

Rain and snow on the Sea of ??Japan side, autumn leaves on the Pacific side... prepare for the cold north wind

2024/11/23 06:50

Today, the 23rd (Sat), the weather on the Sea of Japan side will be prone to rain and snow.
In northern Japan, the west wind will strengthen in some areas, especially in the morning, so please be careful of strong winds and high waves.

On the other hand, the Pacific side will be blessed with sunshine, and it will be a good day for viewing autumn leaves.
Strong north winds will blow, so please take all necessary measures against the cold when you go out.



Around Japan, the pressure distribution will shift to a "winter type" with high pressure in the west and low pressure in the east toward the night.

Rain and snow will fall over a wide area on the Sea of Japan side, and in northern Japan, the atmospheric conditions will be very unstable as cold air flows into the sky.
Please be careful of strong west winds, high waves, and violent gusts such as lightning and tornadoes associated with developed cumulonimbus clouds, especially in the morning.

The Pacific side will be sunny, but the cold north wind will strengthen.
Please choose clothes that can protect you from the cold when you go out.



The air will feel cold throughout the day on the Sea of Japan side.

Even on the sunny Pacific side, many places will likely feel chilly even during the day.
Please be aware of temperature differences as it will be even colder in the mornings and evenings.

Tohoku: Cold air above causes unstable atmosphere; be cautious and alert for westerly winds

2024/11/23 06:05

Today, the 23rd (Sat), a low pressure trough accompanied by cold air above is expected to pass through northern Japan.

In Tohoku, a low pressure system is moving southeastward, and the pressure gradient between it and the high pressure system on the continent is large.

This will cause stronger westerly winds, which will cause rough seas on the Sea of Japan side.

If the high pressure system in the west and low pressure system in the east becomes stronger than expected, there is a possibility of strong winds and high waves that will warrant a warning on the Sea of Japan side.

In addition, due to the influence of the cold air above, the atmosphere will remain very unstable until around noon, mainly on the Sea of Japan side.



#Wind forecast

Maximum wind speed expected today (maximum instantaneous wind speed)
Sea of Japan side, at sea: 18m/s (30m/s)
Sea of Japan side, on land: 15m/s (30m/s)
Pacific side, at sea: 15m/s (25m/s)
Pacific side, on land: 12m/s (25m/s)

#Wave forecast

Wave height expected today
Sea of Japan side: 5m
Pacific side: 3m

On the Sea of Japan side of Tohoku, please be careful and alert for strong westerly winds and high waves from around noon today, Saturday the 23rd.

In addition, be careful of strong gusts of wind such as tornadoes, lightning strikes, and hail, especially in areas along the Sea of Japan.

If there are signs of a developed cumulonimbus cloud approaching, please take steps to ensure your safety, such as by moving inside a sturdy building.

Flu surge: Winter weather returns over the weekend

2024/11/22 18:26

Today, the 22nd (Friday), the Ministry of Health, Labor and Welfare announced the influenza outbreak situation from November 11th to 17th. The number of reports from designated medical institutions in one week was 9,309, an increase of about 4,000 from the previous week. Influenza is now in a nationwide epidemic period, so caution will be required in the future.

Today, the Kanto region was warm and the weather was mild. Many places west of the Kanto region rose to nearly 20 C, with central Tokyo at 18 C (similar to early November), Osaka at 18.5 C (similar to mid-November), and Kagoshima at 20 C (similar to mid-November), but it looks like winter's cold will return this weekend.



Tomorrow, the 23rd (Sat), the atmospheric pressure will be winter-like, and cold air will flow in again. The cold air will remain until the day after tomorrow, the 24th (Sun). Snow will fall mainly on the Sea of Japan side of northern Japan, and rain is likely to fall in Hokuriku and Sanin. There may also be some areas with thunder. Meanwhile, the Pacific side will have clear winter skies, but the air will be dry.



The expected maximum temperature is likely to be below 15 C in many areas west of Kanto. In Fukuoka, temperatures are expected to be 15 C on both the 23rd (Sat) and 24th (Sun), similar to early December, while in Tokyo, temperatures are expected to be 13 C on the 24th (Sun), similar to early December. In Sapporo, temperatures are expected to be 5 C on the 23rd (Sat) and 4 C on the 24th (Sun), so it will be cold even during the day. Northerly winds will be blowing across the country, so it will feel colder than the temperature numbers indicate.

Four typhoons occur simultaneously in November, a first in history. Unseasonably warm weather. Weather and temperature summary (November 10th to November 16th)

2024/11/22 17:24

Summary of the weather for this period (November 10th to November 16th)
The average temperature was 3 C or more higher than normal in many areas west of Kanto, making it quite warm for this time of year. Some areas, such as Nagoya, Nagano, and Kagoshima, were 4 C or more higher. Northern Japan was also 1 C or more higher than normal, and the Sea of Japan side of Hokkaido was 2 C or more higher than normal. Many areas had lower precipitation than normal, but southern Kyushu, Okinawa, and Amami, where humid air from the edge of the high pressure system flowed in, received about twice the amount of precipitation compared to normal. The Izu Islands and Ogasawara Islands also received more precipitation than normal. The hours of sunshine were about twice as long as normal from southwestern Hokkaido to Tohoku and the Sea of Japan side of Hokuriku. On the other hand, the hours of sunshine were short in areas west of Kanto, especially on the Pacific side, and Okinawa and Amami were also below normal.



#Characteristics of pressure distribution
On the 10th, high pressure moved away to the sea east of Japan, Typhoon No. 23 moved east of the Philippines, and Typhoon No. 24 moved westward near Minamitorishima. On the 11th, a cold front passed through northern Japan, and low pressure moved east from the Izu Islands and Amami. Typhoon No. 23 made landfall in the Philippines. On the 12th, the center of the mobile high pressure moved from the central Sea of Japan to the sea east of Japan. At 3:00 a.m., Typhoon No. 25 formed east of the Philippines. This is the first time in history that four typhoons, No. 22 to No. 25, have occurred simultaneously in November. On the 13th, the center of the mobile high pressure moved to the Sea of Japan. Typhoon No. 24 moved northwest through the Mariana Islands. Typhoon No. 25 moved west-northwest east of the Philippines. On the 14th, high pressure moved its center from northern Japan to the sea east of Japan. Typhoon No. 25 moved with very strong force from the east of the Philippines to the Bashi Channel. On the 15th, a mobile high pressure system moved far east of Japan. Typhoon No. 25 moved northward through the Bashi Channel at a slow speed. On the 16th, a low pressure system formed south of Kyushu and moved northeast-northeast.

#Precipitation
On the 10th, Okinawa and Amami experienced very heavy rain locally. Record-breaking short-term heavy rain information was announced one after another in the northern part of Okinawa Island. On the 11th, rain fell widely, mainly on the Pacific side of eastern and western Japan, and the rain intensified in Amami, Kagoshima, and the Izu Islands. On the 12th, rain clouds gradually covered Hokkaido from the afternoon. From the evening to the night, it moved south toward the Sea of Japan. On the 13th, rain continued until dawn on the Sea of Japan side where the north winds of the high pressure system were blowing. During the day, the high pressure system covered a wide area and many areas were sunny. Moist air flowed into the Ogasawara Islands, and 18 mm of moderately heavy rain was observed in Chichijima Island per hour. On the 14th, the high pressure system moved away from the east of Japan, and moist air flowed in around the edge of the high pressure system, causing light rain in the Tokai region. On the 15th, clouds spread across the country, and very heavy rain of 50 mm fell in Higashi Village, Okinawa Prefecture, and the daily precipitation reached 107 mm. On the 16th, heavy rain fell on the Pacific side of western Japan, including 37.5 mm in Sakihama, Muroto City, Kochi Prefecture, and 36.5 mm in Abutsu, Nichinan City, Miyazaki Prefecture. The range of rain spread to eastern Japan by night.

#Temperature
On the 10th, the highest temperature in Tokyo was 16.4c, surpassing the 15.8c recorded on the 8th, but still the second lowest this season. Temperatures rose in areas with long periods of sunny weather, with 18.3c (similar to late October) in Sendai and 24.4c (similar to mid-October) in Osaka. On the 11th, Mino City, Gifu Prefecture, recorded 26.5c, the highest temperature ever recorded in November. Other locations, such as Maebashi City, Gunma Prefecture, with 25.3c and Kochi City, Kochi Prefecture, with 27c, recorded summer days. On the 12th, temperatures rose mainly in Western Japan and Tokai. Kagoshima recorded 26.2c, recording another summer day following the 11th. On the 13th, central Tokyo exceeded 20c for the third consecutive day. On the 14th, Kagoshima recorded 26.5c. This was the eighth summer day in November. This was the most summer days observed in November since statistics began. The number of winter-day locations was the highest this season, at 220. On the 15th, it was as warm as mid- to late October, with 23.8 C in Kagoshima and 20.7 C in Osaka. On the 16th, many places in northern Japan had higher temperatures than average, with Sukayu in Aomori City, Aomori Prefecture at 14.4 C, more than 10 C higher than average.

Temperatures are fluctuating, with winter arriving on Saturday and Sunday, bringing with it cold winter weather, but temperatures are likely to rise again next week [Weekly Weather]

2024/11/22 14:46

Today, November 22nd (Friday), is the 24th solar term, Shosetsu.

Although it is not yet the start of winter, snow is starting to fall in the mountains, and it is said that it is time for the rain to gradually turn into snow.

Today, it is calm and sunny from the Kanto region to the west, and it is warm, but the temperature is expected to drop this weekend and become cold in winter.

The temperature is likely to continue to zigzag, and the temperature difference is likely to be severe in late November.



Tomorrow, the 23rd (Saturday), the pressure distribution around Japan will be high in the west and low in the east, and strong cold air is expected to gradually flow into the upper atmosphere.

The cold air will peak from the night of the 23rd (Sat) to the morning of the 24th (Sun), and the cold air that brings snow to the plains (below -6 C at around 1,500m above sea level) is expected to flow into northern Tohoku, and the cold air that brings snow to the mountains (below 0 C at around 1,500m above sea level) is also expected to cover western Japan.



#Tomorrow, the 23rd (Sat) Labor Thanksgiving Day

Snow and cold rain will fall mainly in northern Japan and Hokuriku, and the rain may intensify with thunder.
Strong winds may blow and some areas may experience blizzards.

On the other hand, the Pacific side of western to eastern Japan will be sunny, but the cold north wind will blow strongly, making it a "wind chill" day.

The daytime maximum temperature will rise to around 15 C from the Kanto region to the west, but the cold wind will make it feel colder than the temperature.

Please wear clothes that are hard to pass through the wind when going out.


#24th (Sun)

The cold north wind will subside and radiation cooling will intensify in the morning.
As a result, it will be cold on Sunday morning, and road conditions will be bad in areas where snow has fallen.
Please also be careful of frozen roads and frozen water pipes.


#Rain and wind will intensify widely in the middle of next week

It will be sunny nationwide on the 25th (Mon), but it will be a rare sunny day.
A front is expected to pass through Honshu from the 26th (Tue) to the 27th (Wed), and rain is expected to fall nationwide.

This rain will bring cold air again, and temperatures will fluctuate until next weekend.

The cold weather will not continue stably, and the temperature difference between each day and between morning and evening will be large until next week, so please be careful not to get sick.

"Ocean warming" continues; off the coast of Sanriku, temperatures 7 C higher than average; Ocean summary (November 10-16, 2024)

2024/11/22 13:59

"Ocean warming" has not stopped, and high sea surface temperatures continue around Japan.

This is the "Ocean Summary" for November 10-16, 2024.



#Pressure distribution and waves

On the 10th, waves were over 3m high around the low pressure in the East China Sea.
Eastern winds from the edge of the high pressure blew over the ocean south of Japan, causing waves to be over 3m high.

On the 11th and 12th, a low pressure system with a front developed from the continent and moved into the Sea of Okhotsk.
Waves were over 4m high and rough in the Sea of Okhotsk.

On the 13th, the pressure distribution around Japan was high in the west and low in the east.
Rows continued in the Sea of Okhotsk, with wave heights of over 3m off the coast of Sanriku.

On the 14th, easterly winds from the edge of high pressure blew, causing wave heights of over 3m near the Izu Islands.

On the 15th and 16th, wave heights of over 2m near the Sakishima Islands were caused by the northward movement of Typhoon 25.
On the 16th, easterly winds from the edge of high pressure blew off the coast of the Boso Peninsula, causing wave heights of 2 to 3m.



#Sea surface temperature

Towards the end of this quarter, temperatures in the waters of Japan were higher than average, mainly in the central and western parts of the country, by up to 5 C.

In the East China Sea, temperatures in some areas remained slightly higher than average.

On the Pacific side, temperatures were around average, especially off Cape Shionomisaki, where the Kuroshio Current leaves the coast.
Off the coast of Tokai, where the Kuroshio Current comes into contact, temperatures were 2 C higher than average.

Off the coast of Sanriku, where the Kuroshio Current flows northward, temperatures remained significantly higher than average, up to 7 C higher.

Off the coast of southeast Hokkaido, where the Kuroshio Current has separated from the coast, temperatures remained significantly higher than average, up to 5 C higher.

Kanto: Even though it's sunny on Saturday and Sunday, (Saturday) the north wind will make you feel cold, and (Sunday) the morning will be chilly.

2024/11/22 12:22

Today, the 22nd (Friday), the Kanto region is mostly sunny within the high pressure zone.
The wind is also calm, and the sunshine feels warm.

The temperatures as of noon today, the 22nd (Friday), are:
Tokyo: 16.4 C
Yokohama: 15.9 C
Chiba: 17.3 C
Saitama: 16.6 C
Utsunomiya: 15.0 C
Mito: 17.6 C
Maebashi: 17.2 C
.

The temperatures are about 3 to 5 C higher than yesterday at noon, and the cold is easing up.



A low pressure system will pass near Hokkaido tonight, and
A winter-type pressure pattern with high pressure in the west and low pressure in the east is expected to develop tomorrow, the 23rd (Sat), Labor Thanksgiving Day.

As a result, isobars will be crowded in the Kanto region,
Tomorrow, a cold north wind will blow strongly, making it a windchill day.



Most areas in the Kanto region will be sunny on Saturday and Sunday,
but the type of cold is likely to change between Saturday and Sunday.

#(Sat) North winds will make you feel cold

Tomorrow (Sat), the cold north wind will blow strongly.
It will be a cold day with a cold wind.

The temperature will rise to around 15c, but the cold wind will make it feel colder than the temperature.

When you go out tomorrow, it is a good idea to wear clothes that are less likely to let the wind through, such as a windbreaker.


#(Sun) Chills from the bottom

The cold north wind will subside on the 24th (Sun), and radiation cooling will intensify in the morning.

As a result, it will be cold on Sunday morning, dropping to around 3-5c, mainly in northern Kanto.
It will be cold enough to cause frost.

It will be cold in the morning, so please stay warm.
The cold wind will subside during the day, and the sunshine will feel warm despite the temperature.

We recommend wearing clothes that are easy to take off and put on on the 24th (Sunday).


In the middle of next week, the Kanto region will see widespread rain due to the influence of a front and humid air, but temperatures will remain high.

Weather for today, Friday 22nd: Watch out for thunderstorms in northern Japan and Hokuriku; winter pressure pattern to return over the weekend

2024/11/22 08:51

Today, Friday the 22nd, the atmospheric conditions will be unstable in northern Japan and Hokuriku due to the influence of a low pressure system accompanied by cold air. Many areas, mainly the Sea of Japan side of northern Japan and Hokuriku, will experience rain or snow. There may be localized thunderstorms, so be careful of lightning strikes, gusts of wind such as tornadoes, and hail. In inland and mountainous areas of Hokkaido, snow is likely to fall in some areas toward the evening.
The rain is expected to spread to the Sanin region toward the evening. If you are going to be returning home late, please take an umbrella with you.



On the other hand, Western Japan and Kanto, which will be covered by a high pressure system, will receive sunshine from the morning. In particular, in the Kanto region, the temperature is expected to rise by more than 5 C in some places, especially in the southern part of the prefecture where cold rain fell yesterday and the sunshine did not reach. In central Tokyo, the temperature is expected to rise to 18 C during the day, exceeding 15 C for the first time in four days, and it is likely to be as warm as early November.
Many places in Western Japan will have daytime temperatures of around 20 C, making it a comfortable day.

Okinawa will have a lot of clouds, and many places will see rain in the morning. The rain will gradually stop in the afternoon, but the cloudy sky is likely to continue.




The weekend will see a winter-like atmospheric pattern again, with strong cold air below -9 C at around 1,500m above sea level expected to move south. It will snow even on flat land in Hokkaido and northern Tohoku, and there are likely to be areas along the mountains in the Kanto, Koshin, and Tokai regions.
Strong northerly winds will blow, so even if it is sunny in areas on the Pacific side, please take proper measures to protect yourself from the cold, such as wearing a winter coat.