An unusual call to Typhoon No.10 to take early action on September 2nd at 7:04 p.m.
With regard to Typhoon No. 10, the Japan Meteorological Agency made an unusual call using very strong language about four days before it was expected to approach Japan. The reason for this is that typhoon No. 10 is expected to develop to the point where it meets the standard of the special warning of the typhoon.
What is the special warning of a typhoon?
The special warning for typhoons is for three phenomena: storms, storm surges, and waves.
When it is expected to approach with a force that is only once every few decades, it will be announced before the typhoon approaches, based on the prediction of central pressure and maximum wind speed.
The presentation criteria are when the central pressure is expected to reach 930 hectopascals or above, or the maximum wind speed is expected to reach 50 meters or more.
In Okinawa, Amami, and the Ogasawara Islands, the central pressure is less than 910 hectopascals or the maximum wind speed is 60 meters or more.
A special warning for typhoons was issued six years ago and four years ago in Okinawa Prefecture.
On Sundays, we went to the “Special Alert Class”
Typhoon No. 10 meets the standards for typhoon special warnings, with a central pressure of 930 hectopascals on Sunday 6th, a maximum wind speed of 50 meters near the center, and a maximum instantaneous wind speed of 70 meters.
The Japan Meteorological Agency called for a “special warning class” as “it is not the case that a typhoon of this much power approaches western and eastern Japan.”
The typhoon’s special warning is “issued in advance”
The “Special Warning for Heavy Rain”, which has already been announced, will be announced after heavy rains and extremely worsening conditions.
In contrast, a special warning for typhoons will be issued about 12 hours before the center of the typhoon is closest to the target area.
If you are in a place where there is a high risk of disaster, you need to take immediate evacuation action as the last chance to protect your safety.
In addition to the risk of buildings being destroyed by storms, there is also a risk of damage to buildings flooded by heavy rain and storm surges.
It is also important to stay away from cliffs, rivers and coastal areas and shelter in sturdy buildings.
In addition, there is a possibility that familiar things such as bicycles, flowerpots, umbrellas, etc. may become weapons, so please keep them in places that are not blown away, such as in the house.
Mr. Satoshi Sugimoto, Chief Forecaster of the Forecast Division of the Japan Meteorological Agency, said, “After the storm blows out, we will not be able to escape. When a special warning is issued for a typhoon, it is important to take evacuation action before the wind gets stronger. If it becomes such a force, precipitation is expected to increase, and I want you to be vigilable about rain.”
On top of that, he said, “If you think of it as the same typhoon as before, you may suffer more damage than you can imagine. I would like to ask you to act as soon as possible.”
Typhoon with low central pressure at the time of landing
According to the Japan Meteorological Agency, since 1951, when it landed in Japan, the typhoon with the lowest central pressure was Typhoon No. 2 Muroto in September 1961, and it was 925 hectopascals.
At this time, the maximum instantaneous wind speed of 84.5 meters or more was observed at Cape Muroto in Kochi Prefecture, and the maximum instantaneous wind speed of 50.6 meters was observed in Osaka City, causing severe damage due to storms and storm surges.
The second is 929 hectopascals due to Typhoon Isewan in September 1959.
It landed at Cape Shio in Wakayama Prefecture, and a large-scale storm surge occurred in Ise Bay, killing more than 3,300 people. In addition, the maximum instantaneous wind speed of more than 30 meters was observed over a wide area from Kyushu to Hokkaido, and 4697 people were killed and 401 were missing nationwide, the worst damage caused by a typhoon.
The third is 930 hectopascals due to Typhoon No. 13 in September 1993.
It landed in the southern part of the Satsuma Peninsula in Kagoshima Prefecture, and in The town of Kanamine in Minami Satsuma City, Kagoshima Prefecture, debris flow flowed into houses where elderly people and junior high school students had been evacuated, causing major damage to Kagoshima Prefecture, including the sacrifice of all 20 people who had been evacuated.
The fourth was 935 hectopascals in Typhoon No. 15 in October 1951.
This typhoon also landed in Kagoshima Prefecture.
The fifth is both 940 hectopascals,
Typhoon No. 19 in September 1991
Typhoon No. 23 in August 1971
Typhoon No. 23 in September 1965
Typhoon No. 20 in September 1964
Typhoon No. 22 in September 1955
Typhoon No. 5 was established in August 1954.
As a reference record before the start of statistics,
The Muroto Typhoon in September 1934 observed 911 hectopascals at Cape Muroto, and the “Makurazaki Typhoon” in September 1945 observed 916 hectopascals in Makurazaki City, Kagoshima Prefecture.