On January 3rd, 2025, Japan is set for significant weather changes as forecasters predict varying conditions across the country, particularly affecting the Kanto and Tokai regions. Specifically, residents can expect rain and possibly snow as unstable weather arises by the evening.
According to reports from local meteorological agencies, the Pacific side of Japan will experience relatively clear and mild weather on January 3rd. "3日も、太平洋側は晴れて、穏やかな天気となりそうです。ただ、日本海側は雪や雨が降り、関東でも、夕方以降、一部で雨や雪が降るかもしれません。" The contrasting conditions are attributed to pressure changes influencing atmospheric stability.
The Japan Sea side will see more adverse weather with snow and rain likely intensifying at times, which may raise concerns of icy conditions and reduced visibility. Meanwhile, areas such as Sapporo and Aomori are predicted to experience highs below freezing, marking severe wintery conditions. It is advised to prepare for winter weather, particularly as "氷点下で、真冬日となるでしょう。"
Residents of the Kanto region are warned about the potential for health issues stemming from the atmospheric pressure changes. Increased incidences of headaches, dizziness, and overall fatigue are anticipated. The report highlights, "関東の南東海上が気圧の谷となり、寒気が流れ込むため、大気の状態が不安定になります。" This unstable atmosphere could prompt local weather systems to rapidly shift, leading to both sudden storms and drops in pressure.
People accustomed to the holiday season's irregular schedules are advised to focus on maintaining proper health habits, including regular meal times and adequate sleep, as pressure fluctuations may exacerbate health complications. "お正月休みで不規則な生活となっている方もいらっしゃるかと思いますが、睡眠や食事をしっかりとって気圧変化による体調不良の予防を心がけてください。" This advice will be particularly pertinent leading up to January 6th when work routines resume and weather conditions continue to evolve.
By January 4th and 5th, expect continued rain and snow on the Japan Sea side, with the Pacific regions facing persistent chilly conditions. The overall drop in temperatures of about three degrees from the previous day will reinforce the cold winter narrative for much of Japan.
Weather conditions across the nation are set to vary significantly as January progresses, reinforcing the need for residents to stay informed and prepared for adverse weather conditions and the resultant health impacts.