秋田県では大雨による災害の危険度高まる

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秋田県では活発化した梅雨前線の影響で大気の状態が非常に不安定になっている。
県内には発達した積乱雲が次々と流れ込み、一部で大雨になっていて、１４日正午の降り始めからの総雨量は男鹿で１３０ミリを超え、秋田市でも１００ミリを超えている。１６日にかけて雨は断続的に降り続く見込みで、一部では非常に激しい雨が降るおそれがある。 

午前9時現在、土砂災害警戒情報が 秋田市秋田、秋田市河辺雄和、能代市、男鹿市、北秋田市、上小阿仁村、藤里町、三種町、八峰町、五城目町、八郎潟町 に出されている。

【2023年07月15日05時22分　仙台管区気象台発表】
東北北部では、前線や暖かく湿った空気の影響により、大雨となっている所があります。１６日にかけて、大雨による土砂災害、低い土地の浸水、河川の増水や氾濫に厳重に警戒してください。
また、東北日本海側では、１５日昼前から夕方にかけて暴風に警戒してください。 
【気象状況】
 梅雨前線が朝鮮半島から東北北部を通り、日本の東へのびています。前線は、１６日にかけて東北北部付近に停滞し、前線に向かって暖かく湿った空気が流れ込むため、活動が活発な状態が続くでしょう。また、１５日は、北日本では気圧の傾きが大きくなる見込みです。

【予想と防災事項】
＜雨の予想＞ 
東北北部では、警報級の大雨となっている所がある。１５日朝から昼過ぎにかけては、非常に激しい雨の降る所がある見込み。

１５日に予想される１時間降水量は、いずれも多い所で、
東北北部　５０ミリ
東北南部　３０ミリ

１６日に予想される１時間降水量は、いずれも多い所で、
東北北部　３０ミリ
東北南部　３０ミリ

１５日６時から１６日６時までに予想される２４時間降水量は、いずれも多い所で、
東北北部　２００ミリ
東北南部　１２０ミリ

その後、１６日６時から１７日６時までに予想される２４時間降水量は、いずれも多い所で、
東北北部　５０から１００ミリ
東北南部　５０から１００ミリ

＜風と波の予想＞ 
東北日本海側では、１５日は南西の風が強く、しける見込み。 

１５日に予想される最大風速（最大瞬間風速）
東北日本海側　海上　１８メートル（３０メートル）
東北日本海側　陸上　１８メートル（３０メートル）

１５日に予想される波の高さ 
東北日本海側　５メートル 

＜防災事項＞
東北北部では、１６日にかけて、警報基準を大きく超えるような大雨となる所がある見込みです。大雨による土砂災害、低い土地の浸水、河川の増水や氾濫に厳重に警戒してください。また、東北日本海側では、１５日昼前から夕方にかけて暴風に警戒してください。高波にも注意が必要です。

In Akita Prefecture, the atmospheric conditions have become extremely unstable due to the active front of the rainy season. Developed cumulonimbus clouds are flowing into the prefecture one after another, causing heavy rainfall in some areas. The total rainfall since the beginning of the rain on the 14th at noon has exceeded 130 millimeters in Oga and over 100 millimeters in Akita City. Rain is expected to continue intermittently until the 16th, and there is a possibility of very heavy rain in some areas.

As of 9:00 AM, a warning for sediment-related disasters has been issued for the following areas: Akita City, Akita, Kanebe Yuwa, Noshiro City, Oga City, Kitakita City, Kamikoani Village, Fujisato Town, Mitasu Town, Yafucho, Hachirogatacho.

—–Announcement by Sendai Meteorological Observatory at 05:22 AM on July 15, 2023:
In the northern part of Tohoku, there are areas experiencing heavy rain due to the influence of the front and warm, humid air. From the 16th, please exercise extreme caution against sediment-related disasters, flooding in low-lying areas, and increased water levels and floods in rivers due to heavy rain. In addition, please be aware of strong winds in the Tohoku Japan Sea region from midday to evening on the 15th.

[Weather Conditions]
The rainy season front extends from the Korean Peninsula to the northern part of Tohoku and continues to move eastward in Japan. The front is expected to stagnate near the northern part of Tohoku on the 16th, and warm, humid air will continue to flow towards the front, leading to continued active conditions. On the 15th, there is a forecast of a significant change in atmospheric pressure in northern Japan.

[Forecast and Disaster Prevention Measures]
<Rainfall Forecast>
There are areas in the northern part of Tohoku experiencing heavy rain warranting warnings. From the morning to early afternoon of the 15th, there is a possibility of extremely heavy rain in some areas.

The expected hourly rainfall on the 15th is as follows in areas with high rainfall: Northern Tohoku: 50 millimeters Southern Tohoku: 30 millimeters

The expected hourly rainfall on the 16th is as follows in areas with high rainfall: Northern Tohoku: 30 millimeters Southern Tohoku: 30 millimeters

The expected 24-hour rainfall from 6:00 AM on the 15th to 6:00 AM on the 16th is as follows in areas with high rainfall: Northern Tohoku: 200 millimeters Southern Tohoku: 120 millimeters

Afterwards, the expected 24-hour rainfall from 6:00 AM on the 16th to 6:00 AM on the 17th is as follows in areas with high rainfall: Northern Tohoku: 50 to 100 millimeters Southern Tohoku: 50 to 100 millimeters<Wind and Wave Forecast> On the Tohoku Japan Sea side, strong southwest winds and rough seas are expected on the 15th.

The expected maximum wind speed (maximum gusts) on the 15th is as follows:
Tohoku Japan Sea side (offshore): 18 meters per second (30 meters per second) Tohoku Japan Sea side (on land): 18 meters per second (30 meters per second)

The expected wave height on the 15th is as follows:
Tohoku Japan Sea side: 5 meters

<Disaster Prevention Measures>
In the northern part of Tohoku, there is a forecast of heavy rain exceeding the warning criteria on the 16th. Please exercise extreme caution against sediment-related disasters, flooding in low-lying areas, and increased water levels and floods in rivers due to heavy rain. Also, please be cautious of strong winds from midday to evening on the 15th in the Tohoku Japan Sea region. Attention is also required for high waves.


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