Due to the rapidly developing low pressure system, a very strong wind will blow over a wide area from western Japan to northern Japan over the 29th, and it is expected that a blizzard will occur mainly on the Sea of Japan side.
Be cautious as it may affect traffic.
Coastal winds get stronger Snow even in Tokyo
According to the Japan Meteorological Agency, the wind is strengthening mainly in the coastal areas due to the effect of the rapid development of the low pressure system in the Sea of Japan and its progress to the east.
▽ The maximum instantaneous wind speed of 25.3 meters was observed at 6 pm in Hamada City, Shimane Prefecture, and 23.6 meters at 4:30 pm in Waniura, Tsushima City, Nagasaki Prefecture.
Due to the influx of cold air, the temperature, which was 6.7 degrees at noon in central Tokyo, dropped sharply to 1.3 degrees at 4:00 pm, and it snowed in the 23 wards of Tokyo in the afternoon.
Widespread storms and blizzards
Due to the effects of low pressure, there is a risk that extremely strong winds of 20 meters or more will blow in western and eastern Japan and in northern Japan from the 29th.
The peak wind is on the 29th, and the maximum expected wind speed is
▽ Hokkaido, Tohoku, Kinki, and Chugoku region 25 meters,
▽ Hokuriku 23 meters,
▽ Northern Kyushu 20 meters,
maximum instantaneous wind speed from 30 meters. It is expected to reach 35 meters.
There is a risk of a very strong wind blowing around northern Japan on the 30th.
You need to be vigilant against storms over a wide area, especially in areas where it snows, so-called "whiteouts" where the snow rolled up by the wind obscures the line of sight.
The waves are also high,
and it is expected to be
8 meters from Hokkaido to Hokuriku,
and 6 meters on the Sea of Japan side of the Kinki and Chugoku regions.
Be wary of heavy snow after the 29th
After the 29th, the winter-type pressure distribution will become stronger, so it is necessary to be cautious about heavy snowfall, especially on the Sea of Japan side from Hokkaido to the Chugoku region.
The amount of snow that falls in the 24 hours until the evening of the 29th is
▽ 70 cm in Hokuriku,
▽ 60 cm in Niigata and Gifu prefectures,
▽ 50 cm in Hokkaido
,
▽
40 cm in Tohoku and Kinki,
▽ It is expected to be 30 cm in the Chugoku region.
Furthermore, during the 24 hours until the evening of the 30th,
it
will snow
40 cm to 60 cm in Hokuriku
, 30 cm to 50 cm in Tohoku and Kinki, and Niigata prefecture,
and 20 cm to 40 cm in Hokkaido and Gifu prefecture. It is expected.
Be wary of blizzards, heavy snow, and high waves
The Japan Meteorological Agency is wary of blizzards, heavy snow, and high waves, and calls for careful attention to avalanches and power outages caused by snow accretion on electric wires and trees.
Also, in Tohoku and Hokuriku, the atmospheric condition is expected to become unstable due to the approach of a low pressure system, so it is necessary to be careful about severe gusts such as lightning strikes and tornadoes.
What is a rapidly developing cyclone?
A rapidly developing cyclone is characterized by "strong winds" over a "wide range."
It is necessary to be cautious about the impact of blizzards on traffic and to be careful about power outages caused by fallen trees.
According to the Japan Meteorological Agency, a "rapidly developing cyclone" is a cyclone in which the central pressure drops by 20 hectopascals or more (= the power becomes stronger) within 24 hours. It is expected to develop rapidly and approach northern Japan.
The maximum instantaneous wind speed is expected to be 30 meters even on land, and the strength of the wind can be said to be comparable to that of a typhoon, but the range of storms and strong winds is wider than that of a typhoon.
A low pressure system that develops rapidly in winter has a wide range of collisions between cold and warm air, so it is easy for the windy range to widen.
Truck rollover risk of power outage
In general, a storm with a wind speed of 25 meters and an instantaneous wind speed of 40 meters can cause a running truck to roll over or a tree to be uprooted.
In fact, from the 7th to the 8th of this month, a wide range of storms occurred due to the effects of a rapidly developing low pressure system, and in Niigata City, trucks were hit by strong winds, and a total of five trucks rolled over and one person was injured.
In Akita Prefecture, a total of more than 60,000 households lost power due to fallen trees and snow accretion.
If you drive a car in poor visibility, you may suddenly see the car in front of you and the brakes may not be in time, resulting in a rear-end collision.
Please refrain from driving when there is a risk of blizzard.
It is safe to have a fuel-powered heater in case of a power outage.
Beware of the latest information on the risk of blizzards in a wide range
This time, there is a risk of blizzards not only in Hokkaido and Tohoku, but also in Hokuriku, Chugoku, Kinki, and northern Kyushu.
Please be aware of the latest information and refrain from going out during the storm.