There is a risk of heavy snow on the Japan Sea side from the 7th to the 8th. Prepare in advance in disaster-stricken areas. There is a possibility of the first snow in the city (weather forecaster Masashi Tanaka, January 4, 2024) – Japan Weather Association tenki.jp
There is a risk of heavy snow on the Sea of Japan side from the 7th to the 8th. Prepare in advance in disaster-stricken areas. There is a possibility of “first snow” in the city center.
January 4, 2024 15:56
Intense cold air will flow in from the 7th (Sunday) to the 8th (Monday), and there is a risk that the amount of snow will increase on the Sea of Japan side. Please prepare for heavy snow in Hokuriku as well. Snow clouds will also flow into the Pacific Ocean, and there is a possibility that central Tokyo will experience the first snow of the year.
7th (Sunday) – 8th (Monday) Intense cold wave incoming, heavy snow possible on the Sea of Japan side
In the vicinity of Japan, a low pressure system and a front are expected to pass near northern Japan tomorrow, the 5th (Friday), and a low pressure system is expected to form near Hokkaido and the Sea of Japan the day after tomorrow, the 6th (Saturday). After that, on the 7th (Sunday), the area around Japan temporarily experienced a winter-like atmospheric pressure pattern of high in the west and low in the east, and towards the beginning of the 8th (Monday), strong cold air flowed into the upper atmosphere, causing snow in areas on the Sea of Japan side. This is the outlook.
This cold air is expected to reach temperatures below -36 degrees Celsius at an altitude of 5,500 meters, a sign of heavy snowfall, and is expected to extend from the southern Tohoku region to the Hokuriku region. In addition, even stronger cold air with temperatures below -40°C is expected to flow into northern Tohoku and Hokkaido.
As a result, the snow will be heavier in areas along the Sea of Japan from Hokkaido to Tohoku, and from Hokuriku to the San-in area, and there is a risk that even on flat areas, the amount of snow will increase and become heavy snow. Additionally, the Japan Sea Polar Air Mass Convergence Zone (JPCZ) will continue to cover similar areas with snow clouds, and road conditions may deteriorate rapidly. Please consider changing your plans, such as avoiding unnecessary outings.
The amount of snow is also likely to increase in Hokuriku, which was severely damaged by the Noto Peninsula earthquake. Although it may be difficult to obtain supplies, please prepare for heavy snow as far in advance as possible.
In Hokuriku, rain and snow will continue from the day after tomorrow, the 6th (Saturday). As the ground is loose in some areas, caution and vigilance are required not only for heavy snow but also for landslides.
*The Japan Sea Polar Air Mass Convergence Zone (JPCZ) is a region where the cold winds flowing from the Siberian continent are once bisected by the Changbai Mountains (highest peak: Mt. Baekdu, 2,744 meters) located in the northern part of the Korean Peninsula, and the leeward area of Japan is the JPCZ. This is a convergence zone (line where snow clouds are likely to develop) that is formed when they meet again at the sea. JPCZ makes it easier for snow clouds to develop, and when these snow clouds flow one after another, they often turn into heavy snow.
Snow clouds on the Pacific side; possibility of first snow in central Tokyo
Snow will mainly fall in areas along the Sea of Japan, but snow clouds caused by the intense cold air will likely make their way to some parts of the Pacific Ocean as well.
Snow may also fall on the Pacific coast of the Tokai and Kinki regions, which are close to the Sea of Japan. The bottom of the cold air is expected to arrive on the night of the 7th (Sunday), and due to the low temperatures, there is a possibility that roads may freeze due to falling snow. Please be careful when driving.
In addition, in the Kanto region, the temperature is expected to reach -6 degrees Celsius at an altitude of around 1,500 meters, which means it will snow even in flat areas, and is expected to completely cover the southern part of the Kanto region.
This time, it is not a “south coast cyclone” that will have a major impact on the Kanto region, so it is not expected to cause heavy snowfall. It is expected that clouds will form more easily. Therefore, there is a possibility of snow and hail falling in the southern Kanto region, including central Tokyo.
The average first snowfall in central Tokyo is January 3rd, and last season’s first snowfall was January 24th.
What should I be careful about during heavy snowfall in a short period of time?
① If snow removal from the roads cannot keep up, there is a risk that cars will become stuck or become stuck. Particularly on national roads and expressways with heavy traffic, large-scale gridlock may occur and it may take a long time to recover. When driving on snowy roads, it’s a good idea to have a shovel for snow removal, warm clothes, blankets, etc. in your car just in case.
② You also need to be careful about snow falling from the roof. When a large amount of snow accumulates on your roof, the weight of the snow can cause it to slide off all at once. In particular, when working in front of eaves, you need to be careful and check the situation above your head.
③ When snow accumulates in roadside gutters, drainage becomes poor and roads may become flooded. Especially in areas with a lot of snow, water from snow pipes tends to collect on roads, 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 snowfall.
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2024-01-04 06:56:54
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