Hokuriku From the 12th to the 13th, snow on high mountain passes, lightning strikes and gusts of wind. Be careful of hail and hail even on flat areas.
November 10, 2023 18:31
Winter-like atmospheric pressure patterns will continue from the 11th (Saturday). In particular, from the night of the 12th (Sunday) to the 13th (Monday), even stronger cold air will move in, resulting in snow in high-altitude mountain passes. There is a risk of accumulation, so those traveling in this area should take precautions such as preparing winter tires. Even in flat areas, the atmospheric conditions will be extremely unstable, with localized hail and hail falling, and roads may turn white in some places. Also, be careful of lightning strikes, power outages caused by them, strong gusts of wind such as those caused by tornadoes, and heavy rain.
From the morning of the 11th (Saturday), it will turn to snow in some places on the mountain passes.
A cold front is passing through the Hokuriku region. After the cold front passes, the atmospheric pressure will gradually become winter-like. Cold air with a temperature of -3 degrees Celsius at an altitude of approximately 1,500 meters is expected to flow into the Hokuriku region. This will be a cold front that can cause snow on most mountains above 1000 meters.
As a result, areas such as Mikuni Pass on National Route 17 will gradually turn to snow from the morning of Saturday the 11th. On the other hand, since dry air flows in around 3,000 meters above the ground, snow clouds will not develop much, and it is unlikely that there will be much snowfall. Even so, there is a possibility that the road shoulders and bridges may become slightly white, so if you are going to this area, please be aware of changes in road conditions and drive carefully.
On the 12th (Sunday), a trough of atmospheric pressure accompanied by strong cold air will pass through the sky. Will JPCZ also occur?
On the 12th (Sunday), a trough of atmospheric pressure will approach, accompanied by strong cold air in the sky. Near the ground, the winter-like pressure distribution will be temporarily relaxed, but a small cyclone is expected to move through the Sea of Japan, and a JPCZ (Japan Sea Polar Air Mass Convergence Zone) will gradually form in the Sea of Japan. In the middle of winter, this can bring heavy snowfall in the Hokuriku region for a short period of time, so-called heavy snowfall.
This time, the temperature near the ground is high, so it will rain, but there is a risk that rain clouds will develop, leading to lightning strikes, tornadoes, strong wind gusts, and power outages. In addition, there is a risk that hail and hail may fall locally and accumulate on the roads, so please be careful.
Cold air peaks from the night of the 12th (Sunday) to the 13th (Monday), with some places experiencing heavy snowfall in the mountain passes.
From the night of the 12th (Sunday) to the morning of the 13th (Monday), even stronger cold air will flow in. Cold air with temperatures below -30 degrees Celsius at an altitude of approximately 5,500 meters will flow into the Hokuriku region. Although it depends on the conditions, this is one of the indicators for snowfall in flat areas. This time, the cold air at an altitude of about 1,500 meters is about the same level as on Saturday the 11th, and the temperature near the ground is high, so it is unlikely that snow will fall on the flatlands, but there is a risk of full-scale snowfall in the high-altitude mountain passes. there is.
From the night of the 12th (Sunday) to the morning of the 13th (Monday), there is a risk of heavy snowfall along National Route 17 towards Mikuni, Tokai-Hokuriku Expressway, and Hirayu. There is also a risk of snow accumulating on the roads in the Myoko area. If you are planning to head to metropolitan areas such as Tokyo or Nagoya from these areas, you will need to prepare for winter roads, such as changing to winter tires or carrying chains.
Also, although it is the season for viewing autumn leaves, there is a possibility of snow in places higher than around 600 meters above sea level. Even if you are climbing a mountain with a relatively low altitude, you need to take proper measures to protect yourself from the cold. Mountains over 1,500 meters above sea level are prone to heavy snow and blizzards, so we recommend changing your plans.
There is a risk of cold air and heavy rain in areas where the sea surface temperature is high in the Sea of Japan.
The figure shows the distribution of sea surface temperatures in the Sea of Japan as of November 9 and the difference from normal. Sea surface temperatures in the Sea of Japan are still higher than normal, with some places exceeding +3 to +4 degrees above normal. Sea surface temperatures along the coast of Hokuriku are generally 21 degrees or higher.
On the other hand, from the night of the 12th (Sunday) to the morning of the 13th (Monday), cold air of -30 degrees Celsius or lower temporarily flowed in at an altitude of approximately 5,500 meters, and there were times when the temperature difference with sea surface temperature was more than 50 degrees Celsius. Probably. Generally speaking, atmospheric conditions become extremely unstable when the difference between the temperature near the ground and the temperature around 5,500 meters above the ground is 40 degrees or more, so it can be said that atmospheric conditions are extremely unstable when the difference is 50 degrees or more. Probably.
As a result, rain clouds are likely to develop and precipitation will be high. If developed rain clouds hang in similar positions, there is a risk of heavy rain. This is a type of heavy rain that increases the cumulative amount of rainfall, so caution and vigilance are required for landslides.
Be careful of snow at the beginning of the season. Don’t drive like it’s a summer road.
This will be the first real snowfall of the season in the high-altitude mountain passes. It is said that when it snows at the beginning of the season, there is a higher risk of accidents because people are used to the feeling of summer roads. Ideally, you should change to winter tires before heading to a place where snow is expected, but if you have to go out for a sudden errand or other unavoidable situation, carry chains so you can put them on if necessary.
When driving a car, sudden movements are prohibited. Be sure to drive carefully, especially at the beginning of the season. There are places where the road surface is prone to freezing, such as on bridges and tunnel entrances, so please drive at a slower speed than usual.
In addition, there is a risk of localized hail and hail accumulation even in flat areas. Hail and hailstones can accumulate more easily than snow, so even on flat roads, you need to pay close attention to changes in road conditions. Most people have not changed their tires yet, so if it starts to rain or hail, please stop in a nearby parking space or on the shoulder of the road, and if it is unavoidable, slow down and drive carefully. is required.
1-month forecast: susceptible to cold air mainly in the first half
According to the latest one-month forecast announced yesterday, the 9th (Thursday), the first half of the period is likely to be affected by cold air, with temperatures expected to be at or below normal, and precipitation expected to increase mainly in the first half. It’s a prediction. In the Hokuriku region, sunny periods are at a premium, so check the latest weather information and make the most of the sunshine.
On the other hand, the second half of the period will gradually become less susceptible to cold air, and temperatures will likely be higher than normal. Although it looks like the first snow in the flatlands will still be a while away, there is still a risk of snow storms and hail, so we recommend changing to winter tires early and in a planned manner.
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2023-11-10 09:31:29
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