Fall rain front and tropical low pressure Watch out for heavy local rains on Saturdays and Sundays. Fear of very heavy rain (September 11, 2020) – Japan Meteorological Association tenki.jp

09/11/2020 Japan

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Front of autumn rain and low tropical pressure Beware of heavy localized rains on Saturdays and Sundays Fear of extremely heavy rains

The autumn rain front is stagnant from western Japan to the southeastern part, and tropical low pressure is moving north to southern Japan. On Saturdays and Sundays, the atmospheric conditions of the Japanese archipelago are extremely unstable. There will be places where it will rain a lot and it will be strong.

11 (Friday) Heavy rain here and there

Today, the 11th, due to the influence of the autumn rain front and humid air, the atmospheric condition became extremely unstable and rain clouds formed in places from China and Shikoku to the southeastern part of the country. Short-duration heavy rains record information (announced by meteorological stations in each region by observing and analyzing short-duration heavy rains that occur only once every few years) was published many times in China, Shikoku, and Tohoku. ..

Tonight, there will be rain clouds that have developed from Kyushu to the southeastern part of the country. It will rain a lot locally and it will likely rain a lot.

12 (Saturday) Autumn rain front and tropical low pressure

The autumn rain front will stagnate from western Japan to the southeastern part of the country on Saturday morning. Warm, humid air flows toward the front line, and the atmosphere is likely to remain extremely unstable. Also, a tropical low pressure will travel from Tokai off the Kanto coast.

Rain clouds are expected to form in places from Kyushu to Tohoku. There will be places where it will rain a lot and it will be strong. In addition, there is a risk that rain clouds with developed tropical low pressure will hit the Tokai and Kanto regions.

Since it is until 18:00 on the 12th (Saturday), the expected rainfall for 24 hours is 200mm in Shikoku and Tokai, 150mm in Kanto Koshin, 120mm in the Chugoku region and 100mm in Tohoku.

Beware of sediment-related disasters, lowland flooding, flooding, and river flooding. Beware of strong windstorms like tornadoes and lightning. Check with a radar for rain clouds, etc., and move inside the building for signs of a developed rain cloud approaching.

13 (Sunday) Fear of extremely heavy rain north of Tokai

On the 13th (Sunday), the front line will move north into northern Japan. It seems that the extremely unstable state of the atmosphere will continue from Tokai to Tohoku. There will be very strong local rains.

The expected rainfall for 24 hours until 18:00 on the 13th (Sunday) is 100-200 mm in Tohoku and 100-150 mm in Tokai. Be careful in heavy rain.

Heavy local rain in the city The evacuation point is

When local heavy rains occur in the city, there is a risk of water pooling in unexpected places due to poor drainage due to asphalt. Therefore, when evacuating, you should pay attention to the following three points.

① When sheltering from the rain, choose a location on the first floor or above the building, not the basement of the building or the underground city. Even under the bridge the river can rise so avoid it.
② It is very dangerous to walk on a flooded road. Not only can it get caught in the flow of water, it can’t see your feet, so it can fall into a side slot or a gutter. If you have no choice but to walk in the water, check your feet with a cane and move on.
③ On roads that go through low places such as underpasses, if a car is submerged in water, the water pressure can prevent the door from opening. When driving, try to avoid passing roads as low as possible.

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