Heavy rain is expected across Japan starting during the morning commute on May 21, accompanied by a sharp drop in temperature [1, 2].
The weather shift will impact millions of commuters and residents from western to eastern regions of the country [3, 4]. Intense downpours are expected in several areas, potentially disrupting transportation and outdoor activities during the peak travel window.
According to a weather broadcast by ANNnewsCH, the system is driven by a low-pressure front moving in from the west [1, 5]. This front is bringing both the precipitation and cooler air into the region [5, 6].
Temperature fluctuations are already evident. In Nagoya, the temperature was measured at 18.3 °C [7]. While some areas may see a maximum temperature of 25 °C tomorrow [8], the overall trend indicates a significant cooling effect as the front progresses across the archipelago [1, 6].
Meteorologists said there will be specific periods of more intense rainfall [1]. Residents are advised to prepare for the sudden change in weather conditions to avoid delays during the Thursday morning rush [2, 3].
“Heavy rain is expected across Japan starting during the morning commute on May 21.”
The arrival of a low-pressure front during the morning commute increases the risk of transit delays and urban flooding in densely populated areas. The simultaneous drop in temperature suggests a volatile weather pattern that may require residents to adjust clothing and travel plans abruptly.
