Tomorrow Monday, the south coast low pressure will also rain widely. From Tuesday to Wednesday, intense cold weather will hit.
February 12, 2023 at 17:58
Tomorrow, the 13th (Monday), we will be affected by the south coast low pressure system, but due to warm air, it will be “widely rain” instead of snow. After this rain, the winter type is getting stronger and the intense cold is coming. From the 14th (Tue) to the 15th (Wed), there will be widespread snow on the Sea of Japan side, and there is a risk of stormy weather mainly in northern Japan. We need to be careful of heavy snow and intense temperature differences this week.
“South Coast Low Pressure” on Monday, “Intense Cold Attack” from Tuesday to Wednesday
Today, the 12th (Sunday), the area from Kyushu to the southern part of the Tohoku region was sunny and sunny, almost like March, but the spring weather is temporary.
On the night of the 12th (Sunday), a low pressure system accompanied by a front is expected to approach the vicinity of Kyushu, and tomorrow, the 13th (Monday), it is expected to move east while developing south of Honshu. The main low pressure system will move slightly away from land, but another low pressure system is expected to form off the Kanto coast in the early hours of the 13th (Monday) and move slightly inland from the south coast until the morning of the 13th (Monday). .
On the 10th (Friday), heavy snow fell mainly in the inland from Kanto-Koshin to Tohoku due to the influence of the “Southern Coast Low Pressure”, but this time it was warm, so there were many places where it was “rain instead of snow” on the flatlands. will be
After the south coast low pressure has passed, a winter-type pressure pattern is expected to intensify from the night of the 13th (Monday), and strong cold air is expected to flow in from the 14th (Tuesday) to the 15th (Wednesday).
Rainy time zone
From the evening of the 12th (Sunday), it started raining from the west side of Kyushu. At night, the area of rain is expected to spread to Chugoku, Shikoku and Kinki. In southern Kyushu such as Kagoshima, there will be places with extremely heavy rain of 50 mm or more per hour accompanied by thunder. Watch out for thunder and gusts of wind.
On the morning of the 13th (Monday), it will rain over a wide area from Kyushu to southern Tohoku during commuting hours. It seems that there will be places where the rain will become stronger in coastal areas such as the Kanto region. Due to the warm air, it will rain rather than snow in many places, but snow is likely to occur in northern Nagano Prefecture, the flatlands of Aizu and Nakadori in Fukushima Prefecture, northern Kanto, and the high altitude areas of Niigata Prefecture. It’s not expected to be a heavy snow, but let’s take care of the winter equipment when traveling by car.
The maximum temperature will be lower nationwide than today’s Sunday, the 12th, and it will return to the cold weather that seems to be this time of year. In central Tokyo, the temperature on the 12th (Sun) was 16.9°C, which is similar to the warmth of early April, but tomorrow, the 13th (Mon), it will be 9°C, which is likely to be the coldest of winter.
On the night of the 13th (Monday), the rain on the Pacific side will stop, but the winter-type pressure pattern will gradually strengthen, and strong cold air will flow in. The Sea of Japan side is widely snowy, and there will be places where it will get stronger. From the 14th (Tuesday) to the 15th (Wednesday), there is a risk of severe weather mainly in northern Japan.
14th (Tue)-15th (Wed) Intense cold weather
From the 14th (Tuesday) to the 15th (Wednesday), the winter-type atmospheric pressure pattern is expected to strengthen, and strong cold air is expected to flow in. Around 1,500 meters above sea level, cold air with a temperature of -6°C or below (if it rains, it will snow on flat ground) will completely cover the area around Honshu. Cold air with temperatures below minus 12 degrees Celsius is expected to flow into the Sea of Japan side of western Japan. It’s not as cold as last month’s once-in-a-decade level, but it’s expected to be around 7°C lower than normal. There is a risk of heavy snow, mainly in Hokkaido and the Sea of Japan side of the Tohoku region. It will snow from Hokuriku to Sanin. The Pacific side is mostly sunny, but the cold north wind is strong, and it seems that it will feel colder than the temperature number.
The bottom of the cold weather will be on the 15th (Wednesday), and the maximum temperature will be -4°C in Sapporo, 2°C in Sendai and Niigata, and around 7°C in central Tokyo, Nagoya, Osaka, and Fukuoka.
After that, a low pressure system will develop in the Sea of Japan over the weekend, and on the 18th (Saturday) there is a possibility that it will be the first spring in the Kanto region. The maximum temperature in central Tokyo will rise to 15°C, but the temperature difference between days is likely to increase as the temperature will reach 10°C the next day. It is necessary to pay attention to physical condition management.
What precautions should be taken in preparation for heavy snow?
From the 14th (Tuesday) to the 15th (Wednesday), there is a risk of heavy snow again, mainly in northern Japan, so we still need to be prepared.
(1) There is a risk of “heavy traffic jams” and “stuck cars” due to the fact that the snow removal on the road cannot keep up. Especially on national highways and highways with heavy traffic, large-scale stranded vehicles can take a long time to recover. When driving on snowy roads, it is a good idea to prepare a snow removal shovel, warm clothes, blankets, etc. in the car just in case.
(2) Be careful of falling snow from the roof. When a large amount of snow accumulates on the roof, the weight of the snow can cause the snow to slide down at once. Especially when working in front of the eaves, it is necessary to pay sufficient attention such as checking the overhead situation.
③ If snow piles up in road gutters, etc., drainage will be poor and “roads will be flooded.” Especially in areas with a lot of snow, water from the snow melting pipe tends to accumulate on the road, so be careful.
In addition, train schedules may be significantly disrupted. Planned suspensions may be announced in advance, so be sure to check traffic information frequently before heavy snow hits.
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