(1) If the south coast low pressure moves north of Hachijojima, the Kanto area will be covered by the rainfall area of the low pressure and warm air will flow in. Therefore, what falls is likely to be rain instead of snow.
(2) If the south coast cyclone moves a little south of Hachijojima, it will draw in cold air from the north while rainfall will cover the Kanto region. Therefore, it snows easily, and sometimes it snows heavily.
③ If the south coast low pressure system moves south of Hachijojima, the precipitation area itself does not reach the land of Kanto, and in many cases neither snow nor rain falls. However, as cold air moves southward, clouds tend to spread in the Kanto region.
The path of the south coast cyclone and the location of Hachijojima is one of the criteria for forecasting snow in the Kanto region, but this is not the only decisive factor. Whether or not there will be heavy snowfall in the Kanto region depends on factors such as the degree of development of the low pressure system, the speed at which it advances, the drop in temperature, and the inflow of moist air. (Even if it’s raining like ①, if it rains harder, the surrounding air will cool down and turn into snow.)
In the Kanto region, people are usually not used to snow, solatest weather forecastIf snow is expected, please take precautions as soon as possible.
