On the 3rd, the temperature rose in eastern and western Japan, and it became a hot day of 35 degrees or more in various places, especially in Tochigi, Saitama, and Gunma prefectures, where it reached 39 degrees, making it a dangerous heat.
In various parts of eastern Japan, the heat is expected to ease during the day on the 4th, but in western Japan, intense heat is expected to continue, so sufficient attention to heat stroke is still required.
According to the Japan Meteorological Agency, eastern Japan and western Japan were sunny and warm for three days.
The maximum temperature during the day is
39.7 degrees in Sano City, Tochigi Prefecture
, 39.2 degrees in Koshigaya City, Saitama Prefecture
, 39 degrees in Tatebayashi City, Gunma Prefecture
, 38.9 degrees in Kuwana City, Mie Prefecture
, 38.8 degrees in Kawanehon Town, Shizuoka Prefecture,
and Ome, Tokyo.
It became dangerous heat mainly in Kanto Koshin and Tokai,
such as 38.5 degrees in the city .
In addition, it was an extremely hot day at 201 observation points nationwide, with temperatures of 37.5 degrees in Nagoya and Kyoto
, 36.9 degrees in Takamatsu
, 36.2 degrees in Fukuoka,
and 36.1 degrees in central Tokyo
.
According to the Japan Meteorological Agency, the hottest days in central Tokyo were the 13th in three days, the highest number ever.
During the day on the 4th, it became cloudy and rainy in various parts of eastern Japan, and the maximum temperature was 29 degrees in the center of Tokyo. is expected to decline.
However, the intense heat continues in various parts of western Japan, with daytime maximum temperatures expected to reach 36 degrees in Miyakonojo, Miyazaki Prefecture, and 35 degrees in Fukuoka and Takamatsu.
"Heat stroke alert" has been announced in various parts of western Japan, mainly in Kyushu.
Please continue to pay close attention to heatstroke by replenishing fluids frequently and using air conditioning appropriately indoors.
Why is it so hot every day? 3 points
Day after day, the heat continued in various places, and the 3rd was also an extremely hot day, mainly in eastern and western Japan.
There were three main factors behind the rise in temperature over a wide area, in contrast to the rainy season weather caused by typhoons and moist air.
Stronger high-pressure pressure distribution in midsummer
According to the Japan Meteorological Agency, the first is the strength of the "Pacific High".
Over the past few days, the area around Honshu has been covered by a high-pressure system in midsummer.
The cumulonimbus clouds in the East China Sea are behind the strength of the high-pressure system.
In this area, typhoons No. 5 and No. 6, as well as fronts, increased the activity of cumulonimbus clouds, and the rise of warm, moist air strengthened the force of the anticyclone. It means that
Warm air from top to bottom in the Tibetan high pressure system
And the second is the "Tibetan high pressure" overhanging the continent in the sky.
According to the Japan Meteorological Agency's analysis, two high pressure systems with different heights overlapped, covering a wide area of western Japan and eastern Japan with warm air from the lower layers to the upper layers, causing the temperature to rise.
Even hotter due to westerly winds brought about by the heat wave in Europe
Furthermore, meandering westerly winds, which caused record-breaking heat in Europe last month, are said to be a factor pushing up temperatures.
In England and Spain, from the beginning to the end of last month, it was a record heat exceeding 40 degrees in various places.
In the vicinity of western Europe, it is believed that the westerly wind meandered to the north and was covered by a tall high pressure system, and warm air flowed in from the south, causing the temperature to rise.
According to an analysis by the Japan Meteorological Agency, global warming is thought to have had an effect on the rise in temperature, but since the end of last month, westerly winds have reached the vicinity of Japan, and it is possible that the Tibetan anticyclone is extending eastward. is that there is
As a result, the area around Japan is widely covered by these two layers of high pressure, and it is believed that the temperature is likely to rise near the surface.
The heat will ease over the weekend, but beware of high temperatures next week
How long will this heat last?
As the front in northern Japan moves southward, the strength of the Pacific anticyclone is expected to weaken somewhat in the second half of this week, and the intense heat is expected to ease in some places.
However, the Pacific anticyclone is expected to strengthen again next week, and extremely hot days are expected from eastern Japan to western Japan.
On the 1st of this month, the Japan Meteorological Agency announced early weather information on high temperatures in western Japan, Kanto Koshin, Tokai, Tohoku and the Pacific Ocean side of Hokkaido, saying that the average temperature for the five days from around the 7th of next week has increased. did.
The Japan Meteorological Agency said that the risk of heatstroke will increase over the next week, and continues to take thorough measures and calls for attention to health management.