Heavy rain continued to fall in Hokkaido from the night of the 15th, making it a record-breaking heavy rain that exceeds the normal year of August and one month.
Fronts and cyclones bring heavy rain to Hokkaido and Tohoku.
The front is gradually moving southward, and the area of rain spreads from Hokuriku to Kinki, Chugoku, and northern Kyushu.
We have summarized the movement of the front and the points to watch out for in the future.
Northern Japan peaks on the night of the 16th, but continue to be careful
Heavy rain in Hokkaido and Tohoku is expected to peak on the night of the 16th as the front moves southward.
In Hokkaido and the northern part of Tohoku, the ground has become loose due to the heavy rains that have hitherto, and even a little rain will continue to increase the risk of disasters, so please continue to pay attention to the latest weather information.
Front moves south from Niigata to northern Kyushu, fear of heavy rain due to long-term stagnation
The front is expected to move south from Niigata Prefecture to the Sea of Japan side of western Japan on the 17th.
As warm and moist air flows toward the front, extremely heavy rain is expected locally, mainly in Niigata Prefecture, Hokuriku, Kinki, Chugoku, and northern Kyushu.
If there is a lot of water vapor flowing in and rain clouds develop more than expected, there is a possibility that it will rain more than 80 mm in an hour, or rain clouds will continue to cover the same place, and the risk of disasters will increase sharply.
The amount of rain falling in the 24 hours until the evening of the 17th is
▽ Niigata Prefecture, Hokuriku, and the Chugoku region with 180 mm,
▽ Northern Kyushu with 150 mm,
▽ Tokai and Kinki with 120 mm, and
▽ Tohoku with 100 mm .
is expected.
Furthermore, since the front will remain stationary until the 18th, rainfall is expected to increase over time from Niigata Prefecture to the Sea of Japan side of western Japan, and the situation is expected to worsen.
In the 24 hours until the evening of the 18th,
it is expected to rain
100 to 200 mm in the Chugoku region, and 100 to 150 mm in the Tohoku, Tokai, Hokuriku, and Kinki regions.
Check disaster risk before the situation worsens
The Japan Meteorological Agency is strictly vigilant against sediment-related disasters, and calls for vigilance against rising rivers, flooding, and flooding of low-lying land, as well as gusts of wind such as lightning strikes and tornadoes.
Especially in areas where flooding from landslides and river flooding is expected, it is best to leave the area.
In preparation for early evacuation, check the risk of disasters around your home and other areas, and know in advance where you should evacuate to.
Click here for a commentary article on "Sediment disasters: what are the points for caution and evacuation?"
Click here for a commentary on "River flooding: What are the points to be wary of?"
Grasping Risks with “Hazard Maps”
The NHK Nationwide Hazard Map is also useful for understanding risks.
As a hazard map, it is possible to check the risks of about 6000 rivers, which is the largest number at present.
"NHK Nationwide Hazard Map Let's check the risk of the region" *It will be released for a limited time.
However, it does not include all the risks, such as "inland flooding" where drainage cannot keep up with flooding, and "small and medium-sized rivers" where inundation assumptions have not been prepared.
There is risk even in uncolored areas.
Please check the local government's hazard map, etc., including evacuation sites.
In addition to Hokkaido and Tohoku, which experienced record heavy rainfall, the risk of disasters occurring on the Sea of Japan side of eastern Japan and western Japan is likely to rise sharply in the future. Please be so.