Typhoon No. 19 is "rapidly strengthened" It needs to be as alert as a super typhoon Oct. 8 17:59
The large and furious typhoon No. 19 has a power that is comparable to the so-called “super typhoon,” where the “rapid strengthening” occurs, and the maximum wind speed reaches around 60 meters. Experts have pointed out that vigilance is necessary, as there is a possibility that they will approach Japan without weakening their power.
According to the Japan Meteorological Agency, the central pressure of Typhoon No. 19 was 992 hectopascals at 6 pm on the 6th, but it decreased to 915 hectopascals at 6 pm on the 7th and 77 hectopascals in 24 hours.
The phenomenon in which the central pressure drops around 40 hectopascals in 24 hours is called “rapid enhancement” and is a phenomenon peculiar to powerful typhoons.
According to Professor Kazuhisa Tsuboki of Nagoya University, who is familiar with the mechanism of typhoons, it is very rare for a person to drop more than 70 hectopascals in 24 hours.
The typhoon with a maximum wind speed of around 60 meters is called “Super Typhoon” in the United States, and the maximum wind speed of this typhoon is 55 meters, which is comparable to “Super Typhoon”.
Regarding the factors of rapid development, Professor Tsubaki cited the high water temperature of around 30 degrees in the sea area where typhoons have progressed so far.
On top of that, Professor Tsubaki said, “Because the sea temperature in Japan is higher than normal, the power is not weakened and there is a risk that it will approach, so it is necessary to be vigilant. It ’s important to think about a specific method. ”