2023-06-10 02:28:24
More than 50mm of rain in Kagoshima prefecture for one hour like a waterfall.
June 10, 2023 11:28
Today, June 10th (Saturday), the rainy season front is stationary on the southern coast of Honshu. In the Tokara Islands of Kagoshima Prefecture, which is close to the front, more than 50 mm of “rain like a waterfall” was observed in an hour, and “landslide warning information” was announced. The active rain clouds will gradually move north toward tonight, and there is a fear that heavy rain will fall even in the affected areas such as southern Kyushu to Shikoku and Kii Peninsula, which had heavy rain the other day. In some places, the amount of rain has already exceeded that of the rainy season.
More than 50 mm of rain in an hour “waterfall-like rain” and “landslide warning information” announced
Today, the 10th (Saturday), the rainy season front will be stationary on the southern coast of Honshu. In Kagoshima Prefecture, which is close to the front line, and southern Kyushu, it is raining and raining, and in Hirashima, Toshima Village, Kagoshima Prefecture, an extremely heavy “rain like a waterfall” of 53.5 mm per hour (until 8:24 am) was observed. . In addition, in Nakanoshima, Toshima Village, Kagoshima Prefecture, 33.5 mm of “heavy rain” was observed in one hour (until 10:48 am).
As of 10:00 am, “heavy rain warning” and “landslide warning information (warning level 4)” have been announced for Toshima Village, Kagoshima Prefecture.
From tomorrow 11th (Sunday), the seasonal rain front will be stagnant in southern Kyushu, and warm and moist air will flow toward this front, so the atmospheric conditions in southern Kyushu are expected to be very unstable. In the southern part of Kyushu and the Amami region, there is a risk of heavy rain due to localized very heavy rain and heavy rain with thunder before noon on the 11th (Sunday). Beware of gusts of wind such as lightning strikes and tornadoes.
Kyushu – Kii Peninsula Fear of heavy rain again from tonight
From tonight (10th) to tomorrow 11th (Sun), active rain clouds will gradually move north, southern Kyushu to Shikoku, Kii Peninsula, etc. There is a risk that heavy rain will fall even in the disaster areas that experienced heavy rain the other day. In some places, the amount of rain has already exceeded that of the rainy season.
What is very heavy rain?
Heavy rain refers to rainfall of more than 50mm and less than 80mm per hour. This is an image of rain that falls like a waterfall and continues to fall. Also, umbrellas are completely useless, and about half of the people sleeping inside a wooden house notice the rain. It is dangerous to drive a car outside because the water splashes all over the place and reduces visibility.
It should be noted that 50 mm of rain per hour means that if the rainwater does not flow to another place and remains as it is, the rain will be about 50 mm high. If 50 mm of rain falls on 1 square meter in an hour, it will produce 50 liters of water. For example, the open area of an umbrella is about 1 square meter, so if you open the umbrella for an hour, it will receive rain as much as 50 milk cartons.
However, in reality, when the surrounding rainwater collects, it may accumulate more than the amount of rain that fell at that point. In places where it is expected to rain very heavily (in places where it has rained very heavily), be careful of landslides, flooding of low-lying land, and swelling and flooding of rivers.
Premonition of landslide disaster
When a landslide disaster occurs due to heavy rain, there is a phenomenon that serves as a precursor. Please keep this in mind in case of emergency.
The first is that cracks can form in cliffs and ground.
The second is hearing the crackling of wood, the clashing of stones, and the smell of earth.
The third is that the water in wells, rivers, and springs becomes turbid. Even if the spring water stops, it is one of the harbingers.
The fourth is that water springs out from cliffs and slopes.
In addition, there are pebbles falling apart, rumbling of the ground and rumbling of the mountains, the water level of rivers dropping even though it continues to rain, and trees tilting. At times like this, the risk of landslide disasters is increasing. Call out to people around you immediately and evacuate to a safe place.
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