Heavy snow is expected to affect the Kanto-Koshin region from the evening of March 4 through to the morning of March 5, 2025, with significant impacts anticipated on daily life and transportation systems. According to the Japan Meteorological Agency (JMA), areas particularly affected will include the mountainous regions, where snowfall could reach as much as 30 centimeters. Meanwhile, plains, including parts of Tokyo, are forecasted to receive about 10 centimeters of snow.
From March 4, starting around the evening, the inclement weather will see snow or rain begin to fall across Kanto, with the situation likely worsening overnight. The JMA has noted, "Heavy snow is expected to affect the Kanto-Koshin region from the evening of March 4 through to the morning of March 5."
Traffic advisories have already started, with warnings issued to motorists. Preventive closures may be implemented on some sections of the Metropolitan Expressway and Tomei Expressway from the afternoon of March 4 to prevent vehicle stranding. JR East Japan announced it will suspend some limited express train services to and from Nagano and Yamanashi prefectures due to the harsh weather conditions.
Residents of the region are being urged to remain vigilant about potential weather-related hazards. Accumulations of snow on roads, especially those typically low on snowfall, could lead to treacherous conditions. JMA forecasts anticipate wet snow conditions persisting throughout January 5, could significantly impact commute and public transportation.
On the northern plains of Kanto, snow accumulation is expected to be greater, about 15 centimeters, and Tokyo's 23 wards anticipate around 3 centimeters of snowfall. The snowfall's intensity depends greatly on the low-pressure system's position near the East China Sea, especially as colder air moves south you experience decreased temperatures. Temperatures remaining lower than predicted could increase the likelihood of heavy snow warnings.
Snowfall will begin transitioning to rain toward the latter half of March 5 during daytime hours; at which point, accumulation hazards might lessen, particularly within urban zones. Yet, until then, caution is strongly advised. The public is being encouraged to note seasonal changes and seek current updates on conditions and weather forecasts.
Precautionary measures are being recommended to handle the heavy snow effectively. Experts recommend taking ample time to commute—though even familiar routes could take longer than usual and increase the risk of slips or falls. It is also advised to wear appropriate footwear, favoring those with good grip and limited slick soles.
Notably, individuals should be aware of potentially hazardous environments, such as elevated walkways and areas where snow may be compacted, including bus or taxi zones. JMA features specific warnings about these risks, advising the general public to stay updated.
Residents are particularly reminded to avoid carrying items or items hindered mobility, ensuring hands are free to help with balance if needed. Recommendations include wearing rugged, non-slip shoes for walking, especially if snow begins to accumulate on pavements or streets.
Overall, the Kanto-Koshin region must remain alert during this time as persistent, heavy snowfall can result not only from forecasts but also continuous public transportation impact and social activities. Any prolonged snow build-up could lead to disruptions if ignored. JMA notes, "Snow accumulation is expected to reach over 20 cm by the morning of March 5, particularly on mountains."
Preparation is key, as anticipated severe weather conditions force residents to reassess routine plans and activities. With safety as the utmost priority, residents are encouraged to remain observant as forecasts and weather updates are expected to change.