No linear precipitation zone was confirmed. Japan Meteorological Agency “Moist air was not concentrated”

On the 15th, the Japan Meteorological Agency called for caution in Kyushu and Yamaguchi Prefecture for the first time since the start of operation, saying that there is a risk of a "linear rain zone".

Although it rained heavily until the morning of the 16th, no "linear rain zone" was confirmed.

The Japan Meteorological Agency believes that the moist air was not as concentrated as expected.

If the Japan Meteorological Agency determines that a "linear rain zone" may occur, it started operating an initiative to convey it in the weather information from half a day to six hours before last month, and on the evening of the 15th, Kyushu and Yamaguchi Prefecture for the first time. Was announced for.

In Kyushu and Yamaguchi prefecture, rain clouds developed from midnight to early dawn on the 16th, and in Maeda, Kagoshima prefecture, it rained the largest amount of 84.5 mm since the statistics started in 1 hour until after 1:40 am. In addition, it rained 188 mm in 24 hours until 1 pm in Yamae Village, Kumamoto Prefecture.

According to the Japan Meteorological Agency, although the rain clouds developed in a line shape, they did not reach the standards set by the Japan Meteorological Agency, and "information on remarkable heavy rain" was not released to inform the occurrence of the linear precipitation zone.

The Japan Meteorological Agency says that the reason why the rain clouds did not develop as expected is that the warm and moist air flow did not gather in a specific area, and it will be analyzed in more detail.

From past cases, it is said that the accuracy of the prediction of the linear precipitation zone is not necessarily high, with the hit rate being about once every two times nationwide and about once every four times in the local unit.

However, once it occurs, it may cause enormous damage, so the Japan Meteorological Agency wants us to continue to raise the sense of crisis and prepare for disasters when information is released.

Record heavy rain in Tohoku "Check weather information as well"

On the other hand, although no linear precipitation zone occurred in Miyagi prefecture, it was a record heavy rainfall, and damage such as flooding and cliff collapse occurred one after another.

The Japan Meteorological Agency says, "I want you to take necessary disaster prevention measures by checking not only the forecast of the linear precipitation zone but also the weather information issued to the area and the sediment-related disaster warning information."