Decline in Summer High Pressure Expected Next Week; Fronts and Low Pressure to Play Leading Role
September 02, 2023 12:27
We can expect a weakening of the summer high pressure system next week, making it more susceptible to the influence of fronts and low pressure systems. This shift in weather patterns raises hopes for much-needed rainfall in various regions, including Niigata Prefecture.
Southward Movement of Seasonal Fronts and Northward Progression of Tropical Cyclones
Throughout this summer, the dominating force of the “Pacific High” has sustained intense heat across the country.
According to the weekly weather chart, starting from the 5th of September (Tuesday), a front will move southwards and likely linger near northern Japan. This will result in numerous cloudy and rainy days for Hokkaido and Tohoku regions, with rainfall intensifying in the middle of next week, particularly in Tohoku. Consequently, the extreme heat experienced in northern Japan will subside, bringing temperatures similar to those typically observed in September.
In addition, a series of low pressure systems will move northward from the southern ocean, accompanied by a tropical cyclone. This poses a risk of heavy rainfall primarily along the Pacific coast of eastern and western Japan. As such, the persistently high temperatures and humidity will continue.
*Please note that the forecast weather chart (September 3 to 8) also displays typhoons and tropical cyclones as “low” pressure systems.
Possible Relief for Rain-Deprived Niigata Prefecture
Turning our attention to Niigata Prefecture, which has been experiencing a drought, the forecast suggests several sunny days. However, around the 6th (Wednesday) to the 7th (Thursday), the region may be influenced by low pressure systems and fronts, resulting in a significant amount of rainfall. Furthermore, rain is anticipated around the 9th (Saturday) as well as the 14th (Thursday) to the 15th (Friday).
It is worth noting that areas surrounding dams, where the water storage rate has been declining, may experience more rainfall than initially expected. While we hope this precipitation can alleviate the water shortage, it is important to bear in mind that the situation will not improve immediately. Therefore, continued water conservation efforts are necessary.
Kanto Region Gearing up for Increased Rainfall as Typhoon No. 12 Approaches
Similarly, the Kanto region is anticipated to experience widespread rainfall starting tomorrow (3rd), as the moist air associated with Typhoon No. 12 moves in. Depending on the typhoon’s trajectory, intermittent heavy rain is possible until around the 5th (Tuesday), with cumulative rainfall expected to rise.+
This precipitation may contribute to resolving the low rainfall issues prevalent in the mountainous areas of northeastern Kanto. However, it is crucial to remain vigilant as extended periods of rain can lead to the risk of landslides and river flooding. Continuously monitor and stay informed about future updates on these weather conditions.
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Summer high pressure will decline next week Fronts and low pressure will play a leading role Will the low rainfall in Niigata and other areas be resolved?
Next week, the summer high pressure will decline, and the front and low pressure will play a leading role.
September 02, 2023 12:27
Next week, the summer high pressure system will weaken, making it more vulnerable to fronts and low pressure systems. There are many rainy days throughout the country, and in places like Niigata Prefecture, where there is not much rain, the rain may be a blessing.
From the north, the front that divides the seasons moves south. From the south, a tropical cyclone moves north.
This summer, the force of the “Pacific High”, which brings intense heat, has remained strong.
According to the weekly weather chart, after the 5th (Tuesday), the front will move south from the north and become more likely to stagnate near northern Japan. Hokkaido and Tohoku will have many cloudy and rainy days, and the rain may intensify in the middle of next week, especially in Tohoku. With this rain, the extreme heat in northern Japan will subside, and places will have temperatures similar to September.
On the other hand, low pressure systems move north one after the other from the southern sea. There is also a tropical cyclone moving north, and there is a risk of heavy rain in eastern and western Japan, mainly on the Pacific side. The high temperature will continue, and it will be quite humid.
*On the forecast weather chart (September 3 to 8), typhoons and tropical cyclones are also displayed as “low”.
There is a lack of rain in Niigata Prefecture, will it be a blessing rain?
Looking at the forecast for Niigata, where the lack of rain is particularly severe, there will be many sunny days, but around the 6th (Wednesday) to the 7th (Thursday), it is likely to have affected by low pressure and fronts, and it is expected that there will be a lot of rain. . After that, rain is expected around the 9th (Saturday) and 14th (Thursday) to the 15th (Friday).
It is expected that there will be days with more rain clouds than expected along the mountains, and there is a possibility that rain clouds will cover areas around the dams where the water storage rate is falling.
I would like to hope that the water shortage will be resolved, but the situation will not improve immediately, so let’s continue to save water.
Moist air from Typhoon No. 12 flows into Kanto, rainfall increases after tomorrow (3rd)
Even in the Kanto region, rain is expected over a wide area from tomorrow (3rd) as the moist air around Typhoon No. 12 will flow in. Depending on the movement of the typhoon, intermittent heavy rain is possible until around the 5th (Tuesday), and the amount of rain will increase.
Even along the mountains in the northeastern part of Kanto, the rainfall has remained low, so it may lead to the resolution of the low rainfall. On the other hand, there is also the risk of disasters such as landslides and flooding in rivers due to prolonged rain. Pay close attention to future information.
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