High temperatures expected until early December, with cold air moving in from the west and heavy precipitation on the Japan Sea side [Japan Meteorological Agency 1-month forecast]

2024/11/21 16:33

Today, the 21st (Thursday), the Japan Meteorological Agency announced its weather forecast for the next month (November 23rd to December 22nd).



Key points for the next month

Temperature
Not easily affected by cold air, especially in early December
Northern and Eastern Japan will be around or above normal.

Precipitation
It will be easily affected by low pressure and high pressure in the west and low pressure in the east,
The Sea of Japan side of northern and eastern Japan will be around or above normal.




Looking at the monthly average sea level pressure (left),
We can see that the pressure is low from near Japan to far east of Japan, as shown in light blue.

In other words, due to the pressure distribution of high pressure in the west and low pressure in the east, it is thought that there are periods when the Sea of Japan side is more susceptible to the influence of cold air.

Also, looking at the temperature at about 1,500m above sea level (right),
Red stands out mainly in northern Japan, and light blue in western Japan.

From this, it is thought that northern Japan is less susceptible to the influence of cold air and that temperatures tend to be higher than average,
There are periods when western Japan is more susceptible to the influence of cold air.

There are also times when strong cold air will flow in from the west rather than from the north.



Currently, the sea surface temperature around Japan remains high, so even if a cold front that is not as strong as average flows in, the temperature difference between the cold air and the sea surface temperature will be large, and snow clouds may develop more than usual.

If snow clouds stagnate in the same place, there is a risk of heavy snowfall that can cause large-scale traffic disruptions.

Even if temperatures are expected to be higher in northern and eastern Japan and the cold air is unlikely to affect them, please continue to pay attention to snow information in the future.

Cold rain continues in Kanto. There are places where rainbows can be seen when the sun shines through.

2024/11/21 15:27

Today, the 21st (Thursday), the low pressure system over the southern seas of Kanto is moving away, but moist air is flowing in, and some areas in Kanto are still experiencing light rain.
This rain will continue into the afternoon in some areas, mainly along the coast of Kanto.



Where the rain has stopped, the sun will gradually return and the weather is improving.
The unseasonably cold weather is expected to ease.

This morning, in Kanagawa Prefecture, the rain came and went, and a rainbow was seen when the sun shone through the clouds.
It was a double rainbow.



A rainbow is a phenomenon in which bands of light of different colors are seen when sunlight is bent or reflected by water droplets in the air.

#What is a double rainbow
Rainbows can occur as a pair of two rainbows.
A rainbow with relatively dark colors, purple on the inside and red on the outside, is called a primary rainbow.
When the light is strong, a secondary rainbow with a relatively light color and reversed color order may appear outside the primary rainbow.

#I want to go to the base of the rainbow
Have you ever wanted to go to the base of a rainbow
However, you may not be able to reach the base of the rainbow.
A rainbow is circular, with the anti-solar point (the point in the direction of the line connecting the sun and the observer) at the center, and we on the ground see only a part of it.
You cannot get close to a rainbow, so you cannot reach its base.



#How to see a rainbow
Rainbows often appear when the sun's rays shine after rain. Also, because they are created by reflecting the sun's rays, they always appear in the opposite direction to the sun.
Why not try looking for a rainbow with your back to the sun after the rain

Light snow tomorrow: Severely cold and heavy snow expected this winter. Seawater temperature in the Sea of ??Japan is high, so be on guard for heavy snow

2024/11/21 14:23

Tomorrow, November 22nd (Friday), is the 24th solar term "Shosetsu".
It is said to be the time when snow starts to fall, and since it does not snow enough to accumulate, it is called "Shosetsu" written as "small snow".

Today, the 21st (Thursday), there is almost no snow on the plains, but there are some mountains that are covered with snow for the first time this season.

This morning, the Kofu Regional Meteorological Observatory announced that the first snow was observed on the famous peak "Kaikoma-ga-take" at the northern end of the Southern Alps.

This was 22 days later than the average and 8 days later than last year.

This year, the observation of the first snowfall due to its unusual lateness has been a hot topic,
Mount Fuji's first snowfall was observed on November 7th (36 days later than the average), the latest in the 130-year history of observations,
Tateyama also observed its first snowfall on November 8th, 27 days later than the average.



Looking at the average temperature over the 60 days from September 22, the autumn equinox, to yesterday the 20th,
red is prominent in most places, indicating that autumn has been warm.

In eastern and western Japan, the average temperature is more than 3 C higher than normal, indicating that it was an "unusually warm autumn."

However, the three-month forecast released the other day predicts that this winter (December to February) will be average, with the cold winter weather expected to arrive all at once from December.




The average temperature from December to February is expected to be around normal.

In addition, the amount of precipitation, including rain and snow, is expected to be around normal or above normal on the Sea of Japan side of northern Japan to eastern Japan.

Snowfall will be around normal or above normal on the Sea of Japan side of western Japan to northern Japan as there will be more days with winter pressure patterns.




#High sea surface temperatures in the Sea of Japan cause heavy snow

This year, we especially need to be careful of the sea surface temperature in the Sea of Japan.

The Sea of Japan has been about 3 to 4 degrees Celsius higher than average, so even if the usual winter cold air flows in,
the temperature difference with the sea surface makes it easier for snow clouds to develop than usual,
which may result in heavy snow.

Even if the temperature is around average, we need to be careful of heavy snow and snowfall more than usual.

If information about heavy snowfall is announced,
large numbers of vehicles may become stranded,
so it is a good idea to refrain from going out if necessary, and if you must go out, to put on winter tires and keep food and water in your car.

Kanto: Yesterday was the coldest day in 40 years. The next winter may arrive on Labor Thanksgiving Day on the 23rd (Saturday) [Weekend Weather Forecast]

2024/11/21 12:15

Yesterday, the 20th (Wednesday), cold rain continued to fall in the Pacific side of eastern Japan, including the Kanto region, due to the influence of low pressure and humid air.

Yesterday's maximum temperature in Tokyo was 8.8 C, as cold as mid-winter.

It was the first time in 40 years, since November 20, 1984, that the maximum temperature in Tokyo only rose to around 8 C in mid-November, making it an unusually cold day.

The low pressure system that brought the cold rain to the Kanto region is expected to gradually move away to the east of Japan today, the 21st (Thursday).

The Kanto region will continue to be cloudy in the afternoon, but the weather will slowly improve.



On the other hand, the weather in northern Japan and Hokuriku is deteriorating today.

A low pressure system with cold air above is in the Sea of Japan, and is expected to develop and move northeastward by tomorrow, the 22nd (Friday), passing through Hokkaido.

As a result, it is likely that rain or snow will begin to fall in some areas on the Sea of Japan side of northern Japan and Hokuriku from this evening onwards.
In some areas, the rain will intensify with thunder.

Tomorrow, the 22nd (Friday), the pressure distribution will gradually become winter-like, with high pressure in the west and low pressure in the east, and winter is expected to arrive again over the weekend.



Looking at the forecast for the cold air at 9 p.m. on Saturday, the 23rd,
The cold air that brings snow to the mountains is expected to move south to the Shikoku area of western Japan.

In addition, the cold air that brings snow to the plains is also expected to move south to northern Tohoku,
Once again, precipitation in northern Japan is expected to change from rain to snow.

The peak of the cold air is expected to be from the night of Saturday, the 23rd to the morning of Sunday, the 24th,
Some areas in western Japan may see snow on Sunday, the 24th.



Looking at the weather for the next three days,

In Hokkaido, rain is expected to fall in the afternoon on the 22nd (Friday) in coastal areas,
and snow is expected to fall inland.
Cold air will flow in on the 23rd (Saturday), and snow will gradually fall in Sapporo city.

It will be cold in the morning on the 24th (Sunday), and the roads will become slippery and icy, which may worsen the situation.
Even if you have winter tires, please drive slowly at a slower speed.

In Hokuriku, cold rain will fall intermittently, and high-altitude mountains will snow.

The wind will be cold on the 23rd (Saturday), and it will feel colder than the numbers suggest. On the other hand, it is expected that many areas from Kanto to Kyushu will be sunny over the weekend.

The temperature will rise once tomorrow, but it will likely get cold again on the weekend as cold air flows in.

In Tokyo, it will not be as cold this weekend as it was yesterday, but as a cold north wind will blow, it is a good idea to wear clothes that are not easily permeable by the wind when going out.

Western Japan enjoys pleasant weather, while the cold eases in the Kanto region

2024/11/21 06:07

In the Kanto region, cold rain fell from the morning on the 20th, and the maximum temperature was in the single digits in many places, making it a cold day. Today, the 21st, the weather will improve, and the cold of yesterday is expected to ease. In other regions, the temperature will rise compared to yesterday, and it is expected to feel relatively comfortable.



The expected maximum temperature will be 14 C, 5 C higher than yesterday in central Tokyo. It looks like it will be a typical temperature for this time of year.
In Maebashi, it is expected to be 19 C, 10 C higher than the previous day. The difference in sensation will be large, so it is important to be careful about your health.

The temperature will also rise in western Japan, where the sunshine reaches, and it will feel comfortable during the day. The expected maximum temperature is 17 C in Osaka and 18 C in Fukuoka.
In northern Japan, temperatures are expected to be slightly higher than yesterday, reaching 10 C in Sapporo and 16 C in Sendai.

It will be warm during the day, but many places will be chilly in the mornings and evenings. Please be careful when choosing your clothes.

Today's weather: Kanto region is recovering, beware of thunderstorms in Hokuriku

2024/11/21 05:51

Today, the 21st (Thursday), the low pressure system that brought rain to the Kanto region this morning will move eastward, and the weather in the Kanto region is expected to improve. The weather on the Sea of Japan side will be changeable.



Rain and snow will remain in Hokkaido until morning, but some areas will have sunshine in the afternoon. It will get colder in the morning and evening, so be careful of changes in road conditions in snowy areas.

The weather on the Sea of Japan side of Tohoku and Hokuriku will be changeable. There is a possibility of sudden rain in the afternoon, so please bring rain gear when going out.
There is a risk of thunderstorms in Hokuriku, so be careful of strong gusts of wind such as lightning and tornadoes, and sudden heavy rain.

Rain will remain in some areas of Kanto until morning, but the weather will improve in the afternoon. Please be careful not to forget your umbrella when you go home.
Compared to the cold day of the previous day, the temperature is high and the cold is likely to ease.

Many places in Tokai and Western Japan will be exposed to sunlight. Kyushu, Chugoku and Shikoku will have a lot of clouds at first, but the sunshine will gradually return.
Many places will be around 18 C during the day, and it will feel warm under the sunshine. Please be aware of the difference in temperature between morning and evening.

[Weekly Weather] Winter arrives this weekend, snow accumulates on the plains of northern Japan, be careful when driving on unfamiliar roads

2024/11/20 17:00

In the future, the pressure distribution will be a winter type with high pressure in the west and low pressure in the east, and there will be days when cold air moves south.
Snow is expected to fall again in northern Japan over the weekend.

Tomorrow, the 21st (Thursday), a low pressure system in the south of Japan will move northeast, and there will be some areas where rain will remain at dawn, mainly along the Kanto coast.
Due to the influence of a low pressure trough, rain will fall in some areas in the evening in Hokuriku and at night in Hokkaido, and some areas will be accompanied by thunder.
Some areas in northern Hokkaido will have a mixture of snow.

The day after tomorrow, on the 22nd (Friday), a low pressure system will pass through northern Japan, and at night, the pressure distribution will gradually become a winter type with high pressure in the west and low pressure in the east.
Rain will gradually begin to fall in more areas on the Sea of Japan side of western to eastern Japan.
Rain is expected in Tohoku, and wet snow is expected to fall in northern Hokkaido.



#Cold air will move south again over the weekend
Around the weekend from Saturday the 23rd to Sunday the 24th, the winter pressure pattern will strengthen, and cold air from the upper atmosphere will move south again.
Cold air below 0 C at an altitude of 1,500m, which is the guideline for snowfall in the mountains, will move south to the northern Kyushu area, and cold air below -6 C at an altitude of 1,500m, which is the guideline for snowfall on the plains, will move south to northern Tohoku.
Although it will not be as strong as the cold air from the other day, snow is expected to fall in some areas along the mountains in northern Kanto and Hokuriku.
Snow will fall in Tohoku and Hokkaido, and there will be places where snow will accumulate even on the plains in northern Tohoku and Hokkaido.
In addition, the snow is expected to intensify, especially on the Sea of Japan side, and there are areas where the wind will be strong and blizzards will occur.

This cold front will hit over the weekend, so if you are traveling to northern Japan and driving on unfamiliar roads, please use winter tires and allow yourself plenty of time.

Many areas on the Pacific side will be sunny, making it a good day for going out and some areas will be perfect for leaf-viewing.
However, cold north winds are expected to intensify widely.



#Weather at the start of the week
From the 26th (Tue) to the 27th (Wed), a low pressure system will move northeast across the Sea of Japan, and the area where rain will gradually spread from the west.

#Future
The maximum temperature over the weekend is expected to be lower than average in Shikoku to Kanto, with some areas experiencing the cold of December. Other areas will be around average.
Warm air will flow into the low pressure system from the 26th (Tue) to the 27th (Wed), when it will rain widely, and temperatures are expected to be significantly higher than average.
Not only will the temperature difference between morning and evening be large, but the temperature difference from day to day will also be large, so please be careful to manage your health.

Kanto: Temperatures have not risen since morning, with the city center at 8.8c. December cold over the weekend. Some areas will be colder than today in the morning of the new week.

2024/11/20 16:19

As of 2 p.m. today, Wednesday the 20th, the maximum temperature in central Tokyo was 8.8 C, below the coldest period, and as cold as midwinter.

#The temperature barely rose during the day due to cold rain
This morning, many areas in the Kanto region experienced their lowest temperatures of the season due to the cold air remaining in the sky and the cold northerly winds.
In central Tokyo, the temperature dropped to 5.5 C, making it the coldest morning of the season.

In Tokai and Kanto, there were many clouds and cold rain from the morning, and many areas saw a slow rise in temperature during the day.
The temperature in central Tokyo has also remained flat since the morning.
As of 2 p.m., the maximum temperature in the city center was 8.8 C, below the coldest period, and about 7 C lower than average.
If the maximum temperature in the city center is in the single digits below 10 C, it will be the first time in about 8 months since March 23 (9.3 C).
Most areas in southern Kanto, such as Yokohama and Chiba, will not reach 10 C.



It was cold across the country yesterday, Tuesday the 19th, but it's even colder in Tokai and Kanto, where the sun has not reached the area since morning and cold rain has been falling.
In Kanto, some areas have been 6 C or more lower than the maximum temperature on Tuesday the 19th.



#How long will the cold rain last
It is likely to rain in southern Kanto during the evening when people are returning home, and there will be rain in some places in the north at night.
Tomorrow morning, Thursday the 21st, rain is expected to remain in some areas, especially along the coast.



#The morning of the start of the week will be the coldest this season
Looking ahead, the Kanto region is expected to have average weather tomorrow, Thursday the 21st, and higher than average temperatures again on Friday the 22nd.
However, cold air will flow in again over the weekend from Saturday the 23rd to Sunday the 24th, and it will be as cold as December during the day.
The morning of Monday the 25th is expected to be as cold as this morning or the coldest this season in some places.



Until last week, there were many days with temperatures as warm as October, so from now on, there will be days when it feels like the season has progressed all at once.
Please take care of your health by wearing warm clothes to avoid catching a cold.

Typhoon No. 24 turns into a tropical depression; life span is more than 10 days; four typhoons simultaneously formed at one time

2024/11/20 12:36

At 9:00 a.m. today, Wednesday the 20th, Typhoon Manny turned into a tropical depression in the South China Sea.

In November, there was a time when four typhoons, Typhoons No. 22, No. 23, No. 24, and No. 25, occurred simultaneously south of Japan.
Typhoon No. 24, the longest-lived of the four typhoons, also turned into a tropical depression.

[Typhoon No. 22]
Formed at 3:00 AM on November 4th, will become a tropical depression at 3:00 PM on November 12th

[Typhoon No. 23]
Formed at 3:00 PM on November 9th, will become a tropical depression at 3:00 AM on November 15th

[Typhoon No. 24]
Formed at 3:00 PM on November 9th, will become a tropical depression at 9:00 AM on November 20th

[Typhoon No. 25]
Formed at 3:00 AM on November 12th, will become a tropical depression at 3:00 PM on November 16th




Typhoon No. 24 formed in the Marshall Islands at 3:00 PM on November 9th.
After that, it moved westward while developing, and developed from strong to very strong east of the Philippines.
At 9:00 a.m. on the 16th, it became a ferocious typhoon, the strongest in the typhoon classification, and on the 17th, it reached the Philippines with very strong force.
After that, it moved westward over the South China Sea while losing strength, and at 9:00 a.m. today, the 20th (Wednesday), it turned into a tropical depression in the South China Sea.

Typhoon No. 24's life span will be more than 10 days, which is unusual for November.
A typhoon had been present south of Japan for more than two weeks since November 4th, but it is no longer present.

The Moon Approaches Mars! Midnight Weather Forecast

2024/11/20 08:30

Late tonight on the 20th (Wednesday), Mars and the Moon will be seen shining side by side in the eastern sky, shining at a brightness of -0.3 magnitude.

The Moon and Mars will move while gradually shortening the distance between them, and will be closest to each other around 9am tomorrow, the 21st (Thursday).

When they are closest, the sun will rise and the sky will brighten, so Mars will no longer be visible to the naked eye, but the collaboration between the Moon and Mars will be enjoyable until dawn tomorrow, the 21st (Thursday).

In addition, the winter constellations will shine around them.

There are many bright stars in winter, and around the Moon and Mars tonight, you can see the first magnitude star "Pollux" in Gemini and the first magnitude star "Procyon" in Canis Minor.

If you are staying up late or getting up early tomorrow morning, why not take a look at the bright celestial bodies



Rain clouds will spread over the Kanto region late tonight.

Rain will fall on the Sea of Japan side of Hokkaido, and snow will fall inland.

Thick clouds are likely to cover northern Kyushu and Okinawa.

Sunny skies are expected in northern Tohoku, Hokuriku, Kinki, and Chugoku-Shikoku.

It will get cold at night in all areas, so please wear warm clothing when observing the stars outdoors.