2023-10-01 02:22:48
1st: Heavy rain, lightning, and gusts are possible in western Japan to northern Japan. Be careful of sudden changes in weather when enjoying outdoor leisure activities (weather forecaster Tomomi Yoshida October 1, 2023) – Japan Weather Association tenki.jp
1st Western Japan – Northern Japan Risk of heavy rain, lightning, and gusts of wind Be careful of sudden changes in weather when enjoying outdoor leisure activities
October 01, 2023 11:22
Today, October 1st (Sunday), atmospheric conditions are extremely unstable from western Japan to northern Japan due to the effects of fronts and low pressure. Rain clouds have developed in places from Kyushu to Hokkaido, and there is a risk of sudden heavy rain, lightning strikes, and gusty winds. When engaging in outdoor leisure activities, you need to be careful regarding sudden changes in the weather.
Atmospheric conditions are very unstable
Today, October 1st (Sunday), a front is moving south from western Japan to eastern Japan. Additionally, a low pressure system with another front is located in the northern Sea of Japan and is moving north. A front extending from this low pressure system will pass through northern Japan tomorrow, the 2nd (Monday). Warm, moist air is flowing toward these low pressure systems and fronts. In addition, cold air with temperatures below -9°C flowing into the air at an altitude of approximately 6,000 meters above western and eastern Japan, and below -15°C flowing into an area approximately 5,500 meters above northern Japan, resulting in extremely unstable atmospheric conditions from western Japan to northern Japan. .
Be careful of sudden changes in weather when doing outdoor leisure activities.
As of 11:00 a.m. today, October 1st (Sunday), rain clouds are forming from the front from Kyushu to southern Tohoku. Additionally, rain clouds associated with another cold front are covering northern Tohoku and Hokkaido, and rain clouds have developed mainly over Akita and Aomori prefectures. As of 11 a.m., tornado warnings were still being issued for Akita and Aomori prefectures, and according to social media, funnel clouds were seen in some areas.
Rain and thunderstorms will continue from Kyushu to Kanto-Koshin into tonight, with locally heavy rain expected. Rain clouds and thunderclouds are expected to form in places from Hokuriku to Hokkaido. Please be aware of lightning, tornadoes, strong wind gusts, and localized heavy rain.
Even if the weather is sunny, you need to be careful regarding sudden changes in the weather when enjoying outdoor leisure activities.
Signs of approaching thunderclouds, what should you do?
When you’re outside, there’s an easy way to tell if thunderclouds are approaching. There are three signs that thunderclouds are approaching. “Pitch black clouds are approaching” “I hear the rumbling of thunder” “A cold wind suddenly blows”. If you feel these changes, there is a risk that heavy rain or thunder may occur soon, so please evacuate to a safe place immediately.
When a thundercloud approaches, a good place to take shelter is in a nearby sturdy building or inside your car. Taking shelter from the rain under a tree is dangerous because lightning that strikes the tree can jump to people. In the unlikely event that there is no place to evacuate nearby, crouch down with your feet together, head bowed, and cover your ears with both hands.
Severe phenomena caused by isolated thunderclouds often subside following regarding 30 minutes to an hour. Wait for the thunderclouds to pass in a safe place while checking the latest information such as checking the rain cloud radar on your smartphone.
Weather conditions where tornadoes are likely to occur
When the weather conditions are such that tornadoes are likely to occur, the Japan Meteorological Agency issues a “Tornado Warning Information” and calls for caution. Tornadoes are also more likely to occur when a lightning warning is issued or when the weather forecast says that the atmosphere is unstable. However, in some cases, such as when you are outdoors, you may not be able to obtain information on “tornado warnings” or “lightning warnings.” Tornadoes occur “under developed cumulonimbus clouds,” so be aware of the warning signs that cumulonimbus clouds are approaching.
① Even though it’s daytime, pitch black clouds approach and the surroundings suddenly become dark.
② You can hear the rumbling of thunder and see the light of thunder.
③ A cold wind blows.
Also, heavy rain or hail may begin to fall. However, these warning signs do not always occur before a tornado, and they may not be obvious. If you feel even the slightest change, you need to evacuate immediately.
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