The Japan Meteorological Agency warns of potential heavy snow in the Kanto and Koshin regions, particularly in mountainous areas and higher altitudes, on March 3rd and 4th. The forecast indicates that if ground temperatures drop below expectations, even the 23 wards of Tokyo could see snow accumulation. This weather prediction highlights the possibility of significant disruptions from heavy snowfall, including transportation issues and icy road conditions due to frost.

As a result of a low-pressure system accompanying a frontal boundary moving northeast along the southern coast of Honshu, rain and snow are forecasted to fall beginning early on March 3rd and continuing into March 4th. The Japan Meteorological Agency indicates that as temperatures decrease, the likelihood of severe snow warnings increases, further emphasizing the potential danger associated with the predicted snowfall.

By March 3rd at noon, the anticipated snowfall for the following 24 hours varies: up to 10 centimeters in the northern mountainous areas of Kanto, 5 centimeters in Koshin, 3 centimeters across regions from Hakone to Tama, and up to 1 centimeter in the northern plains of Kanto. Following this, the snowfall predictions for March 4th suggest that the northern mountainous areas could receive up to 40 centimeters of snow, with 30 centimeters in Koshin and lesser amounts in other regions, underlining the varying impacts across different localities.