Typhoon No. 10 "Danger of Life" appealing at an unusual interview September 4, 17:52
That was unusual.
The Japan Meteorological Agency and the Ministry of Land, Infrastructure, Transport and Tourism held a joint press conference one after another on the 3rd and 4th, calling for the greatest caution against the approaching typhoon No. 10 using the word "special warning level".
The "special alert" is one of the largest alerts that indicates an "emergency situation", such as once every several decades.
It is unusual to mention from an early stage that the forecast may change depending on the future course of the typhoon.
In order not to cause a serious life-threatening situation.
If there is an unprecedented danger, it is necessary to take precautions and take sufficient precautions.
(Network News Department reporter Yuki Takuma, Aya Noda Naoya Saito / Social Affairs reporter Yuta Okubo)
A strong sense of crisis
It is unprecedented that a person in charge of the Ministry of Land, Infrastructure, Transport and Tourism will be present at a meeting of the Japan Meteorological Agency even if no special warning is issued.
An executive with a sense of crisis behind the unusual story said:
Ministry of Land, Infrastructure, Transport and Tourism,
“We have been discussing within the ministry whether we can convey the risk at an early stage based on last year's typhoon No. 19. We widely communicate our sense of crisis that an unprecedented situation can occur, and we will set the course. I want people in the region to contact the parents as well as encourage them to evacuate and prepare for the whole country.''
Post-war strongest class “Comparable to Isewan Typhoon”
Then what exactly is dangerous?
At a press conference, a person in charge of the Japan Meteorological Agency said that it was as powerful as the 1959 Isewan typhoon, which caused the worst 5098 victims since the Meiji era.
The central pressure of the Isewan typhoon is 929 hectopascals.
Typhoon No. 10 is expected to develop up to 915 hectopascals near Minami Daito Island in Okinawa on the morning of the 6th.
It is said that there is a risk of approaching or landing in the Kyushu region through Okinawa and Amami while maintaining the power of the special warning class.
Usually, the typhoon generated in the southern sea weakens in the process of moving north, but this time it is expected that it will approach Kyushu while maintaining the largest power in history due to the high seawater temperature.
"Collapse in a wooden house" Expected maximum instantaneous wind speed of 80 meters
What should be noted is the prospect of a storm.
The maximum instantaneous wind speed expected in Amami, Okinawa is 80 meters.
In the history of observation in Japan, it is only three times in the past that Mt. Fuji has exceeded 80 meters.
How much damage will it cause?
In fact, the table of damage assumptions distributed at the interview only stated up to a maximum instantaneous wind speed of 60 meters.
You can see how stronger it is than expected.
Instead, the values of wind speed and damage used for tornadoes were given as reference.
Let's look at the damage scale of the corresponding "wind speed 67-80 meters" from the JMA website.
According to it, the damage caused is that the
wooden house is deformed and collapsed.
・Roofing materials from factories and warehouses are peeled off.
・The outer wall of the steel warehouse floats or flies.
・ Asphalt peels off and scatters.
One of the major damages caused by the storm was Typhoon No.15, which caused a large-scale blackout of more than 900,000 houses in Chiba prefecture last year.
The maximum instantaneous wind speed of this typhoon is 57.5 meters.
It is necessary to prepare for storms and damage that far exceed it.
"Before the wind gets stronger, finish the measures"
It is difficult to walk around in a storm, and evacuation and countermeasures may be too late.
When looking at the forecast, it is easy to focus on the center of the typhoon, but it is important to keep in mind that the wind begins to become strong even before approaching.
If the instantaneous wind speed exceeds 30 meters, you will not be able to stand unless you catch something, but it is expected that the wind will exceed 5 days in Okinawa and Amami regions and 6 days in Kyushu region. There is.
A person in charge of the Japan Meteorological Agency stressed the need for early measures, saying, "I want you to finish preparing for the typhoon by 4 days."
Recordable rainfall "Fear of flooding even in large rivers"
The storm is not the only thing to watch out for.
A record value for rain is expected.
For example, in Amami, Okinawa, the maximum is 300 mm in 24 hours until 12:00 on the 6th, and in Amami, Kyushu, the maximum is 600 mm by 12:00 on the 7th.
According to the accuracy of the forecast, it can be shown as a numerical value until 3 days later, but even after that, moist air continues to flow from the south side, and there is a possibility that it will be a record rainfall in a wide range.
A person in charge of the Ministry of Land, Infrastructure, Transport and Tourism expressed a strong sense of crisis at the conference, saying, "There is a risk that the situation will exceed the capacity of the river and will be extremely severe."
Exceeding capacity means the possibility of flooding.
Especially in southern Kyushu (Kagoshima and Miyazaki), "there is an increasing risk of flooding and bank breakage even in large rivers such as nationally managed rivers."
He repeatedly called for the flood hazard map to confirm the dangers in his area, showing how to confirm the hazard map.
URL of hazard map portal site
https://disaportal.gsi.go.jp/ (leave NHK site)
Coastal areas could be severely damaged
Personnel in charge of the Japan Meteorological Agency
“There is a risk of high waves and storm surges that can endanger lives”
During this period, the tide level is the highest in the year.
When a typhoon approaches there, the tide level rises in the form of being sucked up by a low pressure, and the strong winds blow it to the coast, causing waves to rush to places where it would not normally come, which is extremely dangerous.
Storm surges are a type of wave, but their cycle is very long, a few hours. Rather than waves, the sea level rises overall and the volume of seawater increases by an insignificant amount.
Once flooding begins, flood damage can spread all at once in lowlands.
Typhoon No. 10 is expected to approach with the largest power in history.
It has been pointed out that there is a possibility that damage that has never been experienced before will occur in coastal areas, and especially in southern Kyushu and the Amami region, there will be a high possibility of warning tides on the 6th.
The JMA staff said that there is a wide range of potential damage to any route, although there are widespread expectations.
Person in charge of the Japan Meteorological Agency
“It is dangerous even after the storm begins to blow, so it is important to take measures such as evacuation before the wind and rain increase.”
* Prediction of typhoon power, wind, and rain is at 11:00 am on the 4th.
Please check the latest information as it may change in the future.
● How we prepare for a typhoon
This typhoon is expected to cause life-threatening damage beyond its scale.
It is necessary to be fully prepared and vigilant without fear of missed swings.
1.
Measures to take in and around your home in advance
First, measures to take around your house before a storm or heavy rain.
● Fix easily falling objects such as flower pots and bicycles around the house or on the balcony, or keep them in the house.
● For shutters and windows without shutters, attach a shatterproof film to prevent broken glass from splashing.
If you don't have a film, close the curtain or tape it.
●Be sure to clean the gutters and drainage gutters as they may be damaged if they become clogged with dust.
2.
Preparing things to bring out in an emergency
It is also important to check what to bring out in an emergency.
In addition to general preparations for disasters such as drinking water, groceries, portable radios, and flashlights, prepare masks and soaps as well as alcohol and thermometers for hand disinfection as measures against the new coronavirus.
3.
Sharing safety confirmation methods and meeting places with family
It is also important for families to discuss ways to confirm the safety of each other and the meeting place.
Even for elderly people who live apart from their relatives, let them know the evacuation site in case of emergency.
In recent heavy rain disasters, evacuation centers have limited the number of people who can accept it as a countermeasure against the new coronavirus, and there are cases where it is handled outside the evacuation space such as in corridors and lobbies.
Check in advance on the website of the municipality.
Consider evacuating not only to shelters, but to safe relatives and acquaintances' homes.
4.
Refrigerator/freezer in case of power outage
When a power outage occurs due to a typhoon, are the ingredients in the refrigerator okay?
According to a major electronics manufacturer, Panasonic, depending on the model, there is a thing that can keep cold for about 2 to 3 hours if there is no opening and closing of the door even if there is a power outage.
In the freezer, frozen foods such as frozen foods are solidified without gaps before the power failure, so that the temperature is hard to rise.
● How strong is it?
Seeing from past typhoons
How strong is this typhoon?
Compare with past typhoons.
《Stormstorm》
First, "storm".
The maximum instantaneous wind speed of this typhoon is expected to be 80 meters.
It is expected that the wind will be stronger than the maximum instantaneous wind speed of 58.1 meters of Typhoon No. 21, which landed in September 2018.
In this typhoon No. 21, a tanker washed away by strong winds collided with a connecting bridge, and Kansai Airport was temporarily isolated.
It took about 7 months to fully restore the damaged bridge.
In addition, 14 people were killed and 980 were injured by hitting flying objects or falling from the roof.
The maximum instantaneous wind speed of 80 meters expected this time will be 288 km when converted to an hourly speed.
There is a possibility that a moving truck may overturn or a building may collapse, resulting in serious damage over a wide area, so adequate preparation and vigilance are required.
《High Tide》
And "high tide" where a large amount of seawater flows into the land.
Storm surge is a phenomenon in which a typhoon and a developed low pressure approach and the sea surface is sucked up, and a large amount of seawater is blown into the coast by a strong wind.
In Typhoon No. 21 of 2018, high tide occurred in Osaka Bay and the maximum tide level exceeded 3 meters.
A wide area such as the runway at Kansai Airport and the basement of the terminal building was flooded, and it took 17 days to recover.
When a typhoon approaches, a storm will start before the high tide occurs, which may make it difficult to evacuate outdoors.
During this period, the average tide level is the highest in the year, and it is necessary to be more vigilant.