Kanto: Unstable weather. How long will the rain last

2024/05/08 21:30

Today, the 8th (Wednesday), a trough of atmospheric pressure accompanied by strong cold air is passing over the Japanese archipelago. Rain clouds began to form here and there in the Kanto region from around noon, and in Setagaya Ward, Tokyo, a rather heavy rain of 18.5mm per hour was observed.

As of 9 p.m., rain clouds are still spreading over the Kanto region. A pressure trough accompanied by cold air in the sky is expected to pass near Japan tomorrow, the 9th (Thursday), and the Kanto region will continue to experience rain on and off until the morning of tomorrow. It is expected to rain during tomorrow's commuting hours. You may need an umbrella when going out.



Forecast maximum temperature It is likely that there will be many cool places such as Tokyo, Chiba at 20c, and Yokohama at 18c. The minimum temperature in the morning will be a chilly 10-12c, so please be careful not to catch a cold.

From now on, be careful of the heat that is ahead of the season again.

2024/05/08 15:13

The Japan Meteorological Agency has announced early weather information that the Kyushu-Hokkaido region will experience high temperatures for this time of year starting around the middle of next week.

The weather is expected to change periodically from now on, with clear skies through Saturday, and a downhill slope from Sunday, with rain expected throughout the country from Monday to Tuesday.




Temperature It seems like there will be a lot of change as well.
The temperature will rise after this Friday, and during the rainy Sunday to Tuesday, there will be some places where the temperature will temporarily be at or below normal, but from the middle of next week the temperature will be much higher than normal. It looks like the sweaty weather will continue.

In the Kyushu and Tohoku regions, daytime temperatures are expected to reach 25c or higher in the summer, and
inland it is expected to reach 30c in some places, so please be sure to take precautions against heatstroke.

Hokkaido in particular will continue to experience high temperatures, with some days likely to be as hot as July.

It's still cold in the mornings and evenings, so the daily temperature difference is large.

In addition to heat stroke, please be careful of physical fatigue due to temperature differences.

When it's time to go home, umbrellas come in handy in the Pacific side as well.

2024/05/08 12:33

Today, temperatures are dropping mainly in northern Japan and the Sea of Japan side.
The highest temperature at noon was 4.2c in Wakkanai, Hokkaido, and 14.3c in Kanazawa, which is similar to April.
On the other hand, the temperature in central Tokyo is 23.8c, and in Shizuoka is 25.7c, which is typical for this time of year in areas on the Pacific side, and the temperature trends are different between the Sea of Japan and Pacific sides.

The weather is also different.
There are rain clouds mainly on the Sea of Japan side, and on the Pacific side there are many clouds but the sun is shining.

However, after this, you will need to be careful of sudden rain and thunderstorms even in areas on the Pacific side.
After the evening, there are likely to be areas of rain and thunderstorms in areas along the Pacific coast of western and eastern Japan, and in particular, there are likely to be areas of rain in the Kanto-Koshin region and southern Tohoku tomorrow morning.
Today, I think it would be a good idea to bring rain gear with you on your way home.

#What's the weather like tomorrow
It will gradually become covered in high pressure and clear skies, and it will be sunny in western and northern Japan.
The Tokai and Hokuriku regions are also likely to see some sunshine during the day.
The rain in the Kanto-Koshin region and Shizuoka is expected to continue until the morning, and the weather is expected to improve in the afternoon.
In northern Japan, the temperature will rise sharply compared to today, and it will likely be a temperature typical of this time of year.


#What's the weather going to be like
By Saturday, the weather will be sunny across the country and temperatures will rise.
In particular, Saturday is likely to be a summer day in northern Tohoku to Hokkaido, and a midsummer day in Kyushu to southern Tohoku with temperatures of over 30c.
The weather will turn downhill on Sunday, with widespread rain expected on Monday. Rain and winds are likely to increase in areas along the Pacific coast from Monday to Tuesday.
Please check the latest weather information.

Weekly weather forecast: Hot over the weekend, rain from the west toward the start of next week. Be careful of temperature differences.

2024/05/07 23:10

On the 9th (Thursday), the front and low pressure system will move away to the eastern seaboard, and
will slowly begin to be covered by a migratory high pressure system from the west.

From the 10th (Friday) to the 11th (Saturday), the area around Japan will be within the range of a mobile anticyclone.

On the 12th (Sunday), the high pressure system will move east of Japan,
and another front and low pressure system will arrive.

This low-pressure system is expected to develop and advance over the Japanese archipelago at the beginning of next week.




On the 9th (Thursday), cold air will flow into the sky near Japan, causing rain and thunderstorms in the Kanto and Hokuriku regions.

Other areas are likely to be sunny or cloudy.

The expected maximum temperature in many places is around 18-22c
Even if the sun shines, it won't be extremely hot.

However, over the weekend from the 10th (Friday) to the 11th (Saturday),
it was sunny all over the country and the temperature suddenly rose.

The highest temperature on Saturday the 11th is expected to be 27c in Tokyo, Niigata, and Fukuoka, and 26c in Sendai and Osaka.
It is predicted that it will be a summer day with temperatures over 25c in various places.

Although it will be a good day for tourists, we must not let down our guard against the heat.

Even in Hokkaido, where the maximum temperature reached single digits in the middle of this week, the temperature will rise to 24c in Sapporo and 21c in Abashiri on Saturday the 11th.

Please be careful not to get sick due to the daily temperature difference.

In addition, areas with heavy snowfall should continue to be careful of traffic disruptions and avalanches caused by melting snow.

Rain will spread from the west from the 12th (Sunday) to the 13th (Monday).

Southerly winds will become stronger between the low pressure and high pressure systems that are developing and moving over the Japanese archipelago, and
there is a risk of stormy weather especially in the Pacific side of the week.

When the front passes,
there is a possibility of heavy rain and thunderstorms, so be careful.

Please check the latest weather information when you go out at the end of the week.

Midsummer days continue in various places, the cherry blossom front is the goal - Summary of weather and temperature (April 28th - May 4th)

2024/05/07 21:45

This is a summary of the weather and temperature from April 28th to May 4th.

*Summary of the weather for this period (April 28th to May 4th)
The average temperature was higher than normal nationwide as the sky was covered with early summer warmth. In particular, the Tohoku region, which is located within an area of high pressure and receives plenty of sunlight, has a marked tendency for high temperatures; in Sendai, it was 3.8 degrees Celsius above normal. News of cherry blossoms in full bloom continued to arrive from Hokkaido, and on the 3rd, the cherry blossoms bloomed in Kushiro and the cherry blossom front reached the finish line.
Precipitation was higher than normal in the Kanto region, western Japan, and the Nansei Islands, which were affected by fronts and low pressure systems. In Maebashi, the total rainfall during the period was 44.5 mm, which is about 2.9 times the normal amount, and in Naha, the total rainfall during the period was 82.0 mm, which is about 2.1 times the normal amount.
Sunshine hours were lower than normal on the Pacific side of western Japan, where clouds spread near the front. Miyazaki was 46% of normal, less than half of normal. On the other hand, northern Japan, which is within an area of high pressure and receives sunlight, was longer than normal, and Akita's sunshine hours were 1.6 times longer than normal.



[About this period's weather]

*Characteristics of pressure distribution
On the 28th, a low pressure system accompanied by a front left the East Sea, and a mobile high pressure system moved from the Sea of Japan to the coast of the Tokai Sea. On the 29th, high pressure moved east of Japan. A low pressure system accompanied by a front moves eastward over the East China Sea. On the 30th, a low pressure system accompanied by a front moved from the coast of Akita to the east of Hokkaido, and a cold front extending from the low pressure system passed through Tohoku and the Sanin area. A low pressure system accompanied by a front is moving eastward near the southern coast of Honshu. On the 1st, a long front extended from east of Japan to southern China, and a low-pressure system above the front moved east-northeast over the East China Sea and the sea south of Japan. Meanwhile, in the morning, a mobile anticyclone formed in the Sea of Japan and moved southeast. On the 2nd, a front extended south of Japan, and a low pressure system above the front moved eastward east of Japan. The area around Honshu was covered by a belt-shaped high pressure system. On the 3rd, a low pressure system passed over Sakhalin and moved eastward through the Sea of Okhotsk. The area around Japan was covered by a belt-shaped high pressure system. On the 4th, a mobile anticyclone moved east over the sea east of Japan.

*Precipitation
On the 28th, the weather in Okinawa turned downhill as moist air flowed in from the south at the rear of a mobile high pressure system that moved from the Sea of Japan to off the coast of the Tokai Sea and in front of a low pressure system that moved across China. On the 29th, it rained mainly in western Japan, but also in eastern Japan at night. Locally heavy rain was observed in Kyushu and Okinawa. On the 30th, rain fell across the country due to low pressure and a front. The rain was particularly strong in the Kinki region and Chugoku, which are close to the front. On the 1st, rain clouds spread around a stationary front in the south of Japan and a low-pressure system that moved above the front, causing widespread rain to fall across eastern and western Japan and the Nansei Islands. Particularly in the Nansei Islands near the front, heavy rain fell in some places. Towards dawn on the 2nd, it rained in many places in the Kanto region. Okinawa experienced intermittent rain due to the front. On the 3rd, surrounding humid air flowed into the high pressure system, causing rain in southern Kyushu. Additionally, due to the passage of a pressure trough, rain clouds developed locally, and there were places where it rained heavily at dawn. On the 4th, warm, humid air flowed around the edge of the high-pressure system, causing rain to fall on the southwestern islands and the southeastern slopes of Kyushu.

*Temperature
On the 28th, temperatures rose in various places due to early summer warmth in the sky and strong sunlight. It was midsummer for the first time this year in the Kanto and Kinki regions. On the 29th, temperatures rose in inland areas of eastern Japan and Tohoku, reaching the height of summer in some areas. On the 30th, a wide area was covered with clouds, and the number of summer sun spots decreased. In some places on the Pacific side of Hokkaido, the temperature was more than 10 degrees Celsius lower than the previous day. On the other hand, Tokyo recorded a temperature of 25.2c, which is similar to early June. On the 1st, rain fell in western and eastern Japan, mainly on the Pacific coast, and temperatures did not rise during the day. On the 2nd, it was winter in 80 locations across the country, mainly in northern Japan. In Hokkaido, the temperature rise was noticeable on the Sea of Okhotsk side, where the Fohn phenomenon occurred, and in Rikubetsu Town, the temperature difference between morning and daytime became extremely large. On the 3rd, many places were covered in high pressure, making it a summer day. The daily temperature range is large in inland areas, and in Kawauchi, Fukushima Prefecture, the daily temperature range was 25.5 C, with summer and winter days occurring on the same day. On the 4th, it was sunny almost all over the country. Temperatures rose due to strong sunlight and warm air in the sky, making it a summer day across a wide area from Tohoku to Kyushu.

Tonight ~ Tomorrow: Hokkaido: Expected snowfall in flat areas

2024/05/07 14:11

Today, the 7th (Tuesday), a low pressure system accompanied by a front is passing near Hokkaido.
Warm and humid air is flowing in from the south towards the low pressure system, causing widespread rain in Hokkaido, and in some places the rain is becoming heavier.

Tonight, the low pressure system will move toward the Kuril Islands.
In Hokkaido, after the low pressure system passes, the wind is expected to change to a cold northerly wind.
Also, there will be cold air at around 1500m above the ground, with temperatures as low as -3c or below, which is similar to mid-April. It's very cold for this time of year.
As a result, cold weather will return to many parts of Hokkaido.



Especially, Hokkaido In the northern part of the Sea of Japan and the Sea of Okhotsk, it is expected that it will snow intermittently from tonight until Wednesday the 8th, with some places even on flat areas covered in snow.
There is a risk of snow and frozen roads, especially on mountain passes.
Be careful when driving.



Central Hokkaido and Michi Although there is no threat of snow in the south, the predicted maximum temperature in Sapporo tomorrow, the 8th (Wednesday), is expected to be 11 C, which is similar to mid-April, and 7 C lower than today, the 7th (Tuesday).
Please be careful not to get sick due to the fatigue after the holidays or the temperature difference.

Today's weather: Rain from northern to eastern Japan; folding umbrellas are useful in western Japan

2024/05/07 06:58

Today, the 7th, after the holidays, will be a day when you won't be able to do without your umbrella in a wide area from northern Japan to eastern Japan as a front will pass through. Even if it's sunny in western Japan, there are likely to be some areas with showers.



Northern Japan is wide It will rain in the range.
There is a risk of strong winds and heavy rain along the coast.
It would be a good idea to have a sturdy umbrella or raincoat when going out.
The temperature is lower than yesterday in many places, so please be careful when choosing your clothes.

It will be a day when many people in eastern Japan will not be able to do without their umbrellas.
The rain and wind are expected to increase in coastal areas such as the Kanto and Tokai regions during commuting hours. Please be sure to take your actions with plenty of time.
With the rain, the temperature will not rise much and it will feel a little cool during the day. It would be a good idea to have something to put on when you go out.

The sun will gradually return to western Japan. It looks like there will be some places in the Kinki region where the rain will remain until the morning.
Also, as cold air gradually flows into the upper atmosphere, it is likely that there will be sudden rain in some places, mainly on the Sea of Japan side. Even if it's sunny, don't let your guard down and have a folding umbrella with you.

A front passes through the Tokai region. There is a risk of warning-level heavy rain. Be careful of landslides through the night.

2024/05/07 05:14

In the Sea of Japan, there is a low pressure system accompanied by a front that is moving eastward, and the front passes through western Japan and extends to the Nansei Islands. The front extending from this low pressure system is expected to pass through eastern Japan today and into the evening of the 7th. As warm, humid air flows towards the front from the south, heavy rain with thunder will fall in the Tokai region into the evening of today, the 7th, resulting in heavy rain in some places.
If the rain clouds develop more than expected or become stagnant, there is a possibility of warning-level heavy rain.



#Expected Amount of rain (in areas where there is a lot)
+Precipitation expected per hour for today 7th
Aichi Prefecture 40mm
Gifu Prefecture 40mm
Mie Prefecture 40mm
Shizuoka Prefecture 40mm

+Tomorrow 8 Precipitation expected for 24 hours by 6:00 am
Aichi Prefecture 80mm
Gifu Prefecture 60mm
Mie Prefecture 50mm
Shizuoka Prefecture 100mm
#Disaster Prevention Matters
Flooding of low-lying land, rising water in rivers, Please be careful and be on guard against landslides. Also, be careful of lightning, gusts of wind, and hail.

A front will pass through tomorrow on the 7th, warning of heavy rain, especially in the Tokai region!

2024/05/06 16:52

There is a low pressure system in the western part of the Sea of Japan and it is moving eastward.
A warm front is extending from the center to Hokkaido, and a cold front is extending through Kyushu to the East China Sea.

Currently, clouds are spreading around Japan due to pressure troughs and fronts, and it is raining in Hokkaido and western Japan.
In southern Kyushu and the Pacific side of Shikoku, there are places where it is raining heavily with thunder.



Tomorrow 7th A front extending from this low pressure system is expected to pass near Honshu.
As warm, humid air flows toward the front from the south, rain clouds spread across eastern Japan.

Especially in the Tokai region, heavy rain accompanied by thunder will fall from late night on the 6th to early afternoon on the 7th, resulting in heavy rain in some places.
If the rain clouds develop more than expected and become stagnant, there is a possibility of warning-level heavy rain.
Please be careful of flooding of low-lying land, rising river water, and landslides.





[Rain forecast]
Forecast on the 6th The expected hourly precipitation on the 7th is the highest in all places,
Mie Prefecture 30 mm

Aichi Prefecture 40 mm
Gifu Prefecture 40 mm
Mie Prefecture 40 mm
Shizuoka Prefecture 40 mm


24-hour precipitation expected from 18:00 on the 6th to 18:00 on the 7th is high in all places,
Aichi Prefecture 130 mm
Gifu Prefecture: 130 mm
Mie Prefecture: 150 mm
Shizuoka Prefecture: 150 mm
[Disaster Prevention Matters]
Please be careful of flooding in low-lying areas, rising river levels, and landslides. Also, be careful of lightning, gusts of wind, and hail.

Ehime Prefecture: Heavy rain expected tomorrow; be careful of landslides

2024/05/06 07:04

A low pressure system accompanied by a front is near the Korean Peninsula and is moving east-northeast. By Monday night, the 6th, a new low pressure system will form in the Sea of Japan, and a front will extend into western Japan. Therefore, in Ehime Prefecture, winds from the south are expected to strengthen toward the low pressure system and front. In addition, warm and humid air will flow in, making the atmospheric conditions unstable and causing heavy rain in Nanyo.

In areas that were shaken strongly by the Bungo Channel earthquake on April 17, 2020, landslides are more likely to occur even with less rain compared to before the earthquake.



#Rain Forecast
In Nanyo, heavy rain with localized thunder is expected to fall from the afternoon to evening of the 6th (Monday). If the developed rain clouds become stagnant, there is a possibility of warning-level heavy rain.
The expected 1-hour precipitation on the 6th is high in some places,
Southern forecast 30mm

The 24-hour precipitation expected from 6 o'clock on the 6th to 6 o'clock on the 7th is high in all places. ,
Chuyo 80mm
Toyo 80mm
Southern forecast 100mm

#Wind forecast
In Toyo, strong winds will blow from the south into the early evening of the 6th (Monday).

Maximum wind speed (maximum instantaneous wind speed) expected on the 6th
Toyo land 12m/s (25m/s)
Toyo sea 15m/s (25m/s)

"Yamaji wind" The time period that requires caution and the predicted maximum instantaneous wind speed are
25 m/s or more until the beginning of the night of the 6th

#Wave forecast
Wave height expected on the 6th (Monday)
Toyo 1.5 m

Please be careful of landslides, especially in Ainan Town and Uwajima City, which were shaken severely by the Bungo Channel earthquake on April 17th. When at sea, please be careful of strong winds and high waves.