This winter, the strong cold air went south one after another, and every year, even in areas with a lot of snow, there were a series of record snowfalls.
In the future, it will be difficult for cold air to flow in and the temperature will rise, so the Japan Meteorological Agency is calling for caution regarding snowfall and floods caused by melting snow.
According to the Japan Meteorological Agency, strong cold air often flowed in this winter, causing repeated heavy snowfalls in various parts of Hokkaido and the Sea of Japan side, resulting in record snowfalls one after another.
On the 24th, it reached 4 meters and 19 centimeters in Tsunan Town, Niigata Prefecture, and 2 meters and 8 centimeters in Kami Town, Rabbit Wano Plateau, Hyogo Prefecture, both of which were the largest since we started collecting statistics.
In particular, the snow cover in Tsunan Town is the fourth of all the records of the points that are still being observed even in AMeDAS nationwide.
According to the Japan Meteorological Agency, the cause of the heavy snowfall was that a phenomenon called "blocking" in which the high pressure remained for a long time occurred in the eastern part of Siberia, which is the north of Japan, and the westerlies meandered to the south, and the strong cold air continued to flow easily. ..
As the meandering of the westerly wind is disappearing, the southward movement of the cold air is expected to gradually weaken, and the three-month temperature from next month to May is "high" in northern Japan, "normal or high" in eastern Japan, and "normal or high" in western Japan. It is expected to be "almost normal" and "normal or low" in Amami, Okinawa.
Regarding the summer weather from June to August, the Pacific High is expected to overhang to the north, and the temperature is expected to be "high" in northern Japan, eastern Japan, and western Japan, and "normal or high" in Okinawa and Amami. It has been.
Motoaki Takekawa, director of the Japan Meteorological Agency's Extreme Weather Information Center, said, "There is a lot of snow in each area, and there is a risk of avalanches and falling snow due to rising temperatures, as well as floods due to melting snow. I am calling.