2023-05-12 21:03:46
Widespread rain on Saturdays and Sundays Extremely unstable atmospheric conditions, especially in western Japan Heavy rain, lightning strikes, and gusty winds
May 13, 2023 06:03
From the 13th (Sat) to the 14th (Sun), the atmospheric conditions will be very unstable, especially in western Japan. Rain and thunderstorms are expected from Kyushu to Tohoku, and heavy rain is likely to fall locally in Kyushu and the Kii Peninsula. Severe gusts of wind, such as lightning strikes and tornadoes, and hail also require caution.
13th (Sat) Atmospheric conditions are very unstable mainly in western Japan
On the 13th (Sat), low pressure will move northeast near the Tsushima Strait. Warm, moist air is expected to flow toward low pressure. Cold air will flow into the upper skies, and the atmospheric conditions will become very unstable, especially in western Japan.
Kyushu is particularly prone to rain clouds and thunderclouds. Kyushu will have rain and thunderstorms, and it will rain locally like an overturned bucket. The Chugoku region, Shikoku, and Kanto-Koshin are also raining on and off, and it seems that there will be places where the rain will intensify along with thunder. Severe gusts of wind, such as lightning strikes and tornadoes, and hail also require caution. Hokuriku and Tohoku will also have rain and thunderstorms after the evening.
Hokkaido is expected to be mostly sunny. There will be some showers in Okinawa.
14th (Sun) Extremely unstable atmospheric conditions continue, mainly in western Japan
On the 14th (Sunday), a low pressure system will move northeast over the Sea of Japan. Another low pressure system is expected to form near southern Kyushu and move eastward. Warm and moist air will flow toward these low pressure systems, and cold air will flow into the upper atmosphere.
There will be sunny days in Kyushu, but there will be rain and thunderstorms in some places, and heavy rain is likely to fall locally. It will rain intermittently from the Chugoku region and Shikoku to the Tokai and Hokuriku areas, and there will be places where the rain will become stronger with thunder. Heavy rain is likely to occur in the Kii Peninsula. It will rain on and off in Kanto. It seems that there is a place where it rains temporarily in Tohoku. Hokkaido will also have rain clouds at night. It seems that there will be showers in Okinawa too.
15th (Monday) The rain continues and there are places where the amount of rainfall increases
On the 15th (Monday), the atmospheric conditions will become unstable even in eastern Japan.
It looks like it will rain mainly from Kinki to Tohoku. In particular, active rain clouds are likely to hang over the Tokai and Kanto regions. Lightning strikes, gusts of wind, sudden strong rain, and hail also require caution. It will rain in places in Hokkaido. It looks like it will rain in Okinawa, mainly in the Sakishima Islands.
It will continue to rain for a long time, and there is a risk that the amount of rainfall will increase mainly in the Tokai region. Please pay attention to the latest weather information. In addition, there is a risk that the ground is loose in Ishikawa Prefecture and Chiba Prefecture, where a large earthquake occurred and areas where the tremor was large, so it is necessary to be careful and vigilant against landslide disasters even with a little rain. Stay away from dangerous areas.
A sign that a thundercloud is approaching What will you do then?
When you’re outside, there’s an easy way to tell if a thundercloud is approaching. There are three signs that thunderclouds are approaching. “A black cloud is approaching”, “I hear rumbling thunder”, and “Suddenly a cold wind blows”. If you feel any of these changes, you should evacuate to a safe place immediately, as heavy rain and thunder may occur soon.
When a thunderstorm is approaching, the best place to evacuate is in a nearby solid building or in your car. Taking shelter from the rain under a tree is dangerous because lightning that strikes the tree can jump to people. If there is nowhere to evacuate to, squat down with your feet together and your head down, and cover your ears with both hands.
Intense phenomena caused by isolated thunderclouds often subside within 30 minutes to an hour. While checking the latest information, such as checking the rain cloud radar on your smartphone, wait for the thundercloud to pass in a safe place.
What is heavy rain?
Heavy rain refers to rainfall of 30 mm or more and less than 50 mm per hour. This is an image of falling like an upside down bucket. In addition, even with an umbrella, about half of the people sleeping inside a wooden house notice the rain. Outside, the road becomes like a river, and cars running on the highway may experience “hydroplaning,” a phenomenon in which a film of water forms between the tires and the road surface, making the brakes inoperable.
In places where heavy rain is expected, it is possible to cause landslide disasters, flooding of low-lying land, and swelling and flooding of rivers, so caution is required.
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