1-month forecast: High temperatures nationwide. Prepare for heavy rain before the rainy season begins.

2024/05/10 15:09

On the 9th (Thursday), the Japan Meteorological Agency announced the forecast for the month from May 11th to June 10th.



#Nationwide Temperatures at an altitude of approximately 1,500 meters are expected to be higher than normal near Japan, and warm air is expected to easily flow in from the south.
As a result, temperatures will be high across the country over the next month.
In particular, the Japan Meteorological Agency has issued "early weather information regarding high temperatures" from Kyushu to Hokkaido, and it is predicted that "considerable high temperatures" will occur from around May 15th.
The summer days continue for days on end, and in some places it will be the height of summer.
When spending a long time outdoors, such as during a sports day, be careful of heat stroke.
Please remind children and elderly people who are sensitive to heat to stay hydrated frequently.



#Precipitation From now on, the high pressure system east of Japan is expected to be strong, and western and eastern Japan will be susceptible to the effects of moist air circulating around the edge of the high pressure system.
For this reason, it is expected that there will be periods of heavy rain.
Also, there are times when northern Japan is susceptible to the effects of low pressure systems and fronts.
Precipitation is expected to be at or above normal in western and northern Japan, and above normal in eastern Japan.
From the 12th (Sunday) to the 14th (Tuesday), the rain and wind will become stronger nationwide, and there is a risk of warning-level heavy rain, especially on the Pacific side.
Before the rainy season begins, it is best to prepare for heavy rain.
Precipitation in the Okinawa/Amami region will be around normal.
In a normal year, the rainy season starts around May 10th in the Okinawa region, and around May 12th in the Amami region.
The announcement of the start of the rainy season may be delayed, but rain and cloudy days will continue in the second half of next week.

#Sunshine hours are near normal
Sunshine hours are expected to be near normal in many places nationwide, but on the Pacific side of eastern Japan, they are expected to be near normal or slightly below normal.

Today's weather: It's a good day for washing in a wide area. There is a large temperature difference throughout the day.

2024/05/10 06:08

Today, the 10th, will be covered by high pressure and sunlight will reach a wide area. Temperatures are rising in many places, and laundry will dry better during the day.



Hokkaido is the beginning Clouds will spread, but they will gradually improve. There will be periods of cloud cover during the night, but it doesn't look like the weather will deteriorate.
The sunlight will reach a wide area in Tohoku. In the northern part of the country, there are places where it rains mainly in the morning, so it's a good idea to bring a folding umbrella when going out.
The temperature is higher than yesterday in many places, and in Obihiro it is expected to reach 21c, 10c higher than the previous day. Please be careful not to get sick due to the temperature difference.

It will be sunny over a wide area from eastern to western Japan. The weather will be mild and sunny during the day, making it a perfect day for doing laundry.
In the morning, radiative cooling will intensify, and the cold will become stronger mainly in inland areas. On the other hand, there are many places where the temperature rises to around 24c during the day, resulting in a large difference in temperature between morning and daytime. It would be a good idea to choose clothes that are easy to adjust.

There are times when clouds spread out in Okinawa, but the weather will not deteriorate.

Temperatures are slow to rise today, and tomorrow they will rise again. Be careful of the temperature difference.

2024/05/09 18:54

Today, the 9th, was a day where temperatures were slow to rise in various parts of the country due to the passage of a trough of atmospheric pressure accompanied by strong cold air over Japan.

Light rain fell in eastern Japan and Tohoku mainly in the morning, and in Gotemba, Shizuoka Prefecture, a maximum temperature of 13.2c was observed, which is similar to late March. Even in Tokyo, the temperature was 18.9c, which is similar to mid-April, making it a cold day for this time of year in many places.



High pressure tomorrow The sunlight reaches over a wide area.
In the early morning hours, radiation cooling is expected to intensify, and the cooling is expected to intensify mainly in inland areas.
During the day, warm air from above gradually flows in, causing temperatures to rise during the day, with many places from Tohoku to Western Japan expected to reach around 24 degrees Celsius. Temperatures will rise in many places compared to today, and it will likely be a pleasant experience during the day.

The predicted maximum temperature is 18c in Sapporo, 24c in Sendai, 23c in Tokyo, 24c in Nagoya, and 25c in Osaka/Fukuoka.

Tomorrow, in addition to the difference in temperature from the day before, the difference in temperature throughout the day will also be large.
Please choose clothes that are easy to adjust and take care not to get sick.

The Kuroshio Current meanders for the longest time in recorded history, causing sea surface temperatures off the coast of Sanriku to rise by up to 7 C (Marine Summary, April 28th to May 4th, 2024)

2024/05/09 16:24

It has been 6 years and 10 months since the Kuroshio Meander began, making it the longest period on record.
Ocean Summary April 28th to May 4th, 2024.



#Barometric pressure distribution On the 28th, a low pressure system accompanied by a front moved eastward east of Japan.
Wave height over 2m in the east of Kanto.
On the 30th, there was a low pressure system with a front off the coast of Tokaido and Akita, each moving northeast.
Towards the 1st, the gradient of atmospheric pressure became larger between it and the high pressure system far east of Japan.
East China Sea - Waves are rising in the east of Japan, and on the night of the 1st, the wave height was 3 meters in the east of Kanto. In the western part of the Sea of Japan, northeast winds from the edge of the high pressure system were blowing, and the waves were slightly higher. On the 2nd, a frontal low pressure system moved eastward east of Japan.
The wave height was 4m near the Izu Islands.
On the 3rd, a low pressure system moved eastward over the Sea of Okhotsk.
Wave height is 2m in the west of Hokkaido.
On the 4th, the sea area around Japan remained calm, covered by a mobile anticyclone.



#Sea surface temperature
Towards the end of this period, temperatures in the Japanese waters were significantly higher than normal, reaching up to 4 C higher.
In the East China Sea to the Nansei Islands, the sea area continues to be at or slightly above normal.
On the Pacific side, the Kuroshio Current continued to meander, and conditions continued to be slightly lower than normal, mainly off the coast of Cape Shiono, where the Kuroshio Current leaves the shore.
Off the coast of Sanriku, where the Kuroshio Current moves northward, the sea area continued to be much higher than normal, with temperatures up to 7 degrees Celsius.
Oyashio current continues to be much higher than normal off the southeastern coast of Hokkaido, where it is receding.
In the Sea of Okhotsk and the waters around the Kuril Islands, conditions remained near normal.

Weekly Weather: Risk of stormy weather from 12th to 14th

2024/05/09 14:42

Tomorrow the 10th (Friday) and the day after the 11th (Saturday) will be covered in high pressure and will be sunny across the country. As we continue to experience summer weather, the temperature difference between morning and evening becomes large, so please wear clothes that allow you to easily regulate your body temperature. In Hokkaido, there will be a period of cloudy and rainy weather on the 11th (Saturday), mainly in northern Hokkaido.

On the 12th (Sunday), the weather will be downhill from the west. The weather is expected to be rough in some places through the 14th (Tuesday) due to the passage of a front and low pressure system.



On the 12th (Sunday), rain is expected to gradually spread over Okinawa and western Japan, with heavy rain expected in some places on the Pacific side of western Japan. It will start raining in the Tokai and Hokuriku areas in the early afternoon. Even if the weather is sunny in the Kanto-Koshin region, clouds are expected to gradually spread. There will be a lot of clouds in northern Japan, especially on the Sea of Japan side, and there will be some places in Hokkaido where it will start to rain.



It will rain across the country on Monday the 13th. Heavy rain is expected to occur in some places, mainly on the Pacific side of eastern Japan, when the front passes. There is a risk of warning-level heavy rain, especially in the Tokai region, which is susceptible to the influence of warm, humid air from the south. In addition, there will be strong winds in some areas, especially along the coast.

On the 14th (Tuesday), sunlight is expected to return to many places in western Japan. There will be some areas in the Kanto region and northern Japan where there will be some lingering rain.

Wednesday the 15th and Thursday the 16th are expected to be broadly sunny and the heat to return.

The weather is heading downhill After the 12th (Sunday), rainy and cloudy days will continue in Okinawa and Amami, and there may be an announcement that the rainy season will begin.

It will be even chillier tomorrow morning, and the weekend will turn into midsummer heat, so be careful of the temperature difference.

2024/05/09 13:27

Today, cold air is flowing into Honshu, and the air is cool even during the day.

The maximum temperature in Tokyo until noon today was 15.5c,
about 8c lower than yesterday.

Tomorrow, the effects of cold air remaining and radiation cooling increasing,
it is likely to be frosty in some places.



Tomorrow morning The expected minimum temperature is
9c in Kyoto City and Wajima City, Ishikawa Prefecture,
6c in Morioka City and Chichibu, Saitama Prefecture,
2c in Shirakawa City, Fukushima Prefecture, Yonezawa City, Yamagata Prefecture, etc. It will be cold enough to cause frost on fields and shrubbery.

Agricultural crops (potatoes, corn, apples, etc.) whose flower buds bloom during this period
must be carefully managed
.


However, during the day the cold air goes away and the sun comes out
The temperature suddenly rises during the day.

In Fukushima City, the temperature ranges from 6c in the morning to 27c during the day, and the temperature difference during the day is over 20c.

Please be careful when choosing your clothes and take care of your physical condition.



Tomorrow(Friday) ) ~ The day after tomorrow (Saturday) and the middle of next week are expected to be largely sunny, and the day after tomorrow (Saturday) is expected to be especially hot.

Looking at Nagano City, where the temperature difference is especially large



Today's temperature is 15 degrees Celsius, which is as chilly as early April, but tomorrow (Friday) it will be 26 degrees Celsius, a summer day, and the day after (Saturday) will be a summer day. With a midsummer day forecast of 31c, it is expected to be as hot as late July.

For next week, please pay close attention to the temperature differences within the day and
day to day.

There have been no typhoons this year.What are the trends this year

2024/05/09 09:19

Typhoon No. 1 has not yet occurred this year.

However, looking at sea surface temperatures, the sea east of the Philippines, far south of Japan, is warm at 29-30 degrees Celsius, which is suitable for the occurrence and development of tropical disturbances. I am.



Tomorrow the 10th In the forecast map for Friday night, a low-pressure area is expected to occur over the southern sea. It is not yet determined whether the low-pressure area where this is expected to occur will develop into a tropical cyclone or typhoon, but some forecast models predict that it will approach the Philippines.

Last year in 2023, Typhoon No. 1 occurred at 3pm on April 20th. Last year, there were 17 typhoons, which was lower than the average number of 25.



This year is El Nino There is a high possibility that the phenomenon will end during spring, and the Pacific anticyclone is strong over the sea south of Japan, so it is expected that there will be fewer cumulonimbus clouds. This is just a trend, so you should always check the latest information on the occurrence and course of typhoons, but in a normal year, the number of typhoons will gradually increase from June onwards.

While we would like to hope that typhoon damage to Japan is minimal, it is important to prepare for heavy rain and strong winds before entering the typhoon season.

Today's weather: Rain mainly in the Kanto region; weather improves in the afternoon; tomorrow will be sunny nationwide

2024/05/09 08:21

The weather today, the 9th (Thursday), is expected to be sunny in many places due to the high pressure system overhanging the East China Sea. However, there are currently some places where it is raining, mainly in the Kanto region. In the Kanto region, you will need an umbrella, especially in the morning. The maximum daytime temperature is expected to be lower than yesterday, reaching 19c in Tokyo. The air will feel cool even during the day.

However, this rain won't last long. In the Kanto region, sunny skies are expected to gradually return from the afternoon.



Tomorrow the 10th (Friday) too, the area around Honshu will be covered by high pressure, and it will be sunny in many places. Temperatures are expected to be higher than today, and it will be a summer day mainly in western Japan. Temperatures are expected to rise by 10 degrees Celsius in Tottori. Please make sure to drink plenty of water to avoid heat stroke.

Possibility of rainy season in Okinawa/Amami, take advantage of sunny weather on weekends

2024/05/09 06:12

The rainy season is approaching in Okinawa and Amami regions. The rainy season starts around May 10th in Okinawa and May 12th in Amami.



The week ahead According to the weather forecast, we will be covered in high pressure until the 11th (Saturday), and the weather will continue to be sunny. The predicted maximum temperature is rising day by day, and the peak of the heat is likely to occur from the 11th (Sat) to the 12th (Sun). Saturday the 11th will be a midsummer day with temperatures of over 30 degrees Celsius on Miyakojima and Ishigakijima. The temperature does not drop easily at night, and Ishigaki Island looks like it will be a tropical night with a minimum temperature of 25 degrees Celsius.

After the 12th (Sunday), there are likely to be many cloudy and rainy days due to the front and humid air. We may finally be entering the rainy season, so take advantage of the sunny weather this weekend.

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.