[ad_1]
September Weather Summary What is the weather in October when the typhoon is approaching and record heat continues?
In early September, Typhoons 9 and 10 approached Japan one after another. Also, even though it was September, there were places where the heat exceeded 40 degrees Celsius. Also, due to the influence of typhoons and the front lines, the number of clear autumn days has decreased. Also keep an eye out for typhoon trends in October.
In early September, typhoons approach in rapid succession and the special kind of warning is avoided …
Typhoon No. 9 grew into a large and extremely strong force, and it came closer to the Okinawa region at dawn of the day. A storm blew over Okinawa and we observed a maximum instantaneous wind speed of 54.5 m / s and a 24-hour rainfall of 225.0 mm at the Kumejima airport.
After that, Typhoon No. 9 moved north, and on the afternoon of the 2nd, a part of the northern part of Kyushu entered the storm zone, and before dawn on the 3rd, the instantaneous maximum speed was observed. 46.2 m / s wind speed at Tsurugihara, Tsuma City, Nagasaki Prefecture. A strong wind was blowing.
Typhoon No. 10 is expected to be boarded and landed by a special warning class force, and an early evacuation was requested before the approach, but the force weakened earlier than expected and was actually damaged by the rain and high tide. It has also decreased.
According to the Meteorological Agency, this is because (1) the dry air flowed into the typhoon from the East China Sea and the development of the typhoon was suppressed, and (2) the heavy rains did not last long because the typhoon moved heading north over the western Kyushu Sea at high speed. In addition, the correction method of the numerical forecast model tended to make a slightly over forecast, and (3) the peak time of the tidal level deviation deviated from the high tide time.
However, although it did not reach the special alert class, due to the proximity of the typhoon, the maximum instantaneous wind speed was observed at 59.4 m / s at Nomozaki, Nagasaki City, Nagasaki Prefecture, and the instantaneous speed of the Highest wind and maximum wind speed in the history of the observation were recorded at several locations. It was renewed and a storm blew around the southwestern islands and Kyushu.
Also, in Nango, Misato-cho, Miyazaki prefecture, it rained more than a month in September (the total rainfall from 4 to 7 was 599.0 mm) in 4 days, causing heavy rains mainly in Miyazaki prefecture. .
Due to the effects of this typhoon, storms, torrential rains, high waves and high tides hit several places, mainly in the southwestern islands and Kyushu, causing human damage and damage to homes. Also, due to the storm, power outages occurred in a wide area centered on Kyushu while the heat still lingered.
Furthermore, the rain clouds developed locally even in areas far from the center of the typhoon, causing heavy rainfall of more than 200mm per hour on the Pacific side of western and eastern Japan.
The effect of the typhoon is also the record temperature and residual heat mainly on the side of the Sea of Japan, such as Hokuriku.
From 2 to 3, due to the influence of Typhoon No. 9, a fane phenomenon occurred mainly on the side of the Sea of Japan in the northeast part of China, and it was a hot day with a maximum temperature of 35 ° C o plus. We set the record for the highest temperature in September in various places such as Niigata City, Fukui City, and Wajima City, Ishikawa Prefecture.
Additionally, on Day 3, 40.4 ° C were observed in Sanjo City, Niigata Prefecture, and 40.0 ° C in Womb City, breaking the national record for highest temperature of 39.7 ° C in Kumagai City, Saitama Prefecture, and nationwide in September. It was the first time to observe 40 ℃ or more, and it was record heat.
From 6th to 8th, due to the influence of Typhoon No. 10 (or the temperate low pressure that changed since the typhoon), warm air from the south flowed into the vicinity of Japan, and the Fane phenomenon was added on the Sea side from Japan. , Hokuriku and Tohoku, mainly on the Sea of Japan side, again had severe residual heat.
On the 8th, Yamagata City recorded the first two consecutive hot days in September since it began collecting statistics, and Takada, Joetsu City, Niigata Prefecture, also recorded the first three consecutive hot days in September. Additionally, we observed 34.4 ° C in Ashikaga, Hokkaido, and set a new record for the highest temperature in September in Hokkaido.
As a result, the temperature from China to Hokkaido in early September was considerably higher than usual.
Especially from Hokuriku to the Hokkaido side of the Sea of Japan, the average temperature in early September was more than 4 ° C higher than normal, showing that it was record heat for September.
Typhoon, fall rain, instability … less sunny fall
Especially in the middle of the year, except for Okinawa and Hokuriku, the hours of sunshine were less than in the middle of September in the normal year, and in Kyushu and Hokkaido, there were places where the sunshine time was only half a normal year.
Even at the end of the year, in some areas like Kanto Koshin and Tohoku, the hours of sunshine were only half the average year.
October What’s the weather like? What is the typhoon?
Regarding typhoons, 13 typhoons occurred at the end of September this year, and although 7 of them approached the Japanese archipelago, the number of landings is still 0 and no typhoon has arrived as of September 2009. This is the first time since the year.
However, you should not be alert. In October 2019, after the East Japan Typhoon (Typhoon No. 19) landed on the Izu Peninsula in October 2019, it passed through the Kanto region and special heavy rain warnings were announced in 1 metropolitan area. and 12 prefectures, causing flooding of rivers and sediments. The fact that damage has occurred like a disaster will remain fresh in our memory. Before that, typhoons landed in October 2017 and 2014 every few years, causing damage.
And it’s not just the typhoon itself that you need to be aware of. Last year, in October 2019, the warm and humid air from the south and the humid air from Typhoon No. 21, which was very far away, flowed into the low pressure that passed near Japan and rain clouds formed. It was a record heavy rain in Chiba and Fukushima prefectures.
In this way, fronts and low pressures can be stimulated by distant typhoons, causing heavy rains.
Typhoon season will continue into October, so watch out for trends like typhoons and fronts.
related links
Recommended information
