2023-10-07 20:36:47
Due to the influence of the autumn rain front, there will be cold rain into Sports Day on the 9th. Be careful of extremely heavy rain and thunderstorms (weather forecaster Yoshiyuki Maki October 8, 2023) – Japan Weather Association tenki.jp
Cold rain will continue into Sports Day on the 9th due to the influence of the autumn rain front. Beware of very heavy rain and thunderstorms.
October 08, 2023 05:36
Today, the 8th (Sunday) and tomorrow 9th (Monday: Sports Day), it will rain over a wide area from Kyushu to Tohoku due to the influence of the autumn rain front. There are places with very heavy rain and thunderstorms, so be careful of landslides.
Be careful of heavy rain mainly in southern Kyushu on the 8th.
Today, the 8th (Sunday) and 9th (Monday: Sports Day), it will rain over a wide area from Kyushu to Tohoku due to the influence of the autumn rain front. The atmospheric conditions will become unstable due to the effects of low pressure above the front and moist air flowing toward the front, leading to localized extremely heavy rain and thunderstorms.
As of 5 a.m. today, the 8th (Sunday), it is raining in the Nansei Islands and Kyushu, and some rain clouds are covering Shikoku and the Chugoku region. In addition, although it is mainly over the sea, there are some places where there is heavy rain accompanied by thunder. It will rain intermittently throughout the night. Especially in southern Kyushu, there are likely to be places where the rain is extremely heavy and falls like waterfalls. It is likely that the risk of disaster will increase in a short period of time. Please be careful of landslides, flooding of low-lying areas, and rising river waters.
The area of rain will gradually spread eastward, and it will begin to fall in the Kinki, Tokai, and Hokuriku regions in the afternoon. It looks like there will be some places in the Kanto region where it will rain at night. In these areas, even if it’s not raining at the time you go out, don’t forget to bring an umbrella.
Unfortunately, on the 9th Sports Day, it was a bad day to exercise outside.
The autumn rain front will continue to remain stationary in the south of Japan on the 9th (Monday: Sports Day), and a new low-pressure system is expected to form south of Kanto in the evening.
The rain in Kyushu will stop in most places by morning. The rain is expected to stop around noon in the Chugoku region and Shikoku. It looks like it will be a rainy day from the Kinki region to the southern Tohoku region. Since it’s sports day, some of you may be thinking of getting your body moving, but it would be best to exercise indoors. Heavy rain and strong winds are likely to occur in some places, especially on the Pacific side. There will be places in northern Tohoku and Hokkaido where it will rain at night.
Additionally, temperatures are expected to rise slowly, with some places such as the Kanto region expected to see maximum temperatures below 20 degrees Celsius. Until last week, it was hot and reminiscent of summer, but the season is rapidly progressing and it looks like it’s going to get chilly even during the day. Please take care of your health.
What kind of rain is very heavy rain?
Very heavy rain refers to rain with an hourly rainfall of more than 50 mm and less than 80 mm. This is an image of rain falling like a waterfall and continuing to fall. Also, umbrellas are completely useless, and about half of the people sleeping inside a wooden house notice the rain. Driving outside is dangerous because the water is spraying all over the place, making the area whitish and reducing visibility.
In addition, 50 mm of rain per hour means that if the rainwater does not flow to another place and accumulates, the rain that falls will be 50 mm high. If 50mm of rain falls on 1 square meter in an hour, the amount of rain will be 50 liters. For example, the area of an open umbrella is approximately 1 square meter, so if you hold the umbrella for an hour, the amount of rain that is equivalent to 50 milk cartons will hit the umbrella.
However, in reality, when rainwater from the surrounding area collects, it can accumulate in excess of the amount of rain that fell at that spot. In areas where extremely heavy rain is expected, please be careful of landslides, flooding of low-lying areas, and rising and flooding rivers.
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