“Typhoon No. 2 brings long-lasting effects and disaster-class heavy rain in Japan: Weather forecaster’s analysis”

Commentary by Tomoyuki Fujieda, a weather forecaster

[Two points]
1. Long-lasting effects around Okinawa
2. Disaster-class heavy rain in Honshu

[Stagnation near Okinawa]
Typhoon No. 2, a large and very strong force
In the future, it is expected to change its course to the east near Okinawa.
Movement slows down at this point.

The approach of the typhoon itself is around the 31st (Wednesday)
Strong winds and heavy rain are likely to continue for the next three days.

[Unusual development in May]
At one point, the central pressure dropped to 905hPa, marking the second highest increase ever for May.

Due to the effect of the La Niña phenomenon that continued until winter, the waters around the Philippines are still at 30°C.
The sea surface temperature is unusually high for this time of year.
Because Typhoon No. 2 passed through the sea area, it developed unusually for May.
As it moves through areas with low sea surface temperatures, it is expected to weaken as it approaches Japan.

[Typhoon stimulates the rainy season front]
Even if the typhoon is far away
There is also a risk of disaster-level heavy rain near Honshu.

Humid air around the typhoon flows into the seasonal rain front that continues to stagnate near Honshu.
Frontline activity is likely to increase.

If the typhoon continues to stagnate, the impact will be prolonged.
More than 200mm of rain is expected by Tuesday, mainly in the Chugoku region.
It is possible that the rain that falls in the month of May will fall in just a few days, so be careful.

[Future movement depends on the wind in the sky]
Until now, we have been riding the wind around the edge of the Pacific High, but
It is expected that the Pacific High will weaken as it approaches Okinawa.
The typhoon can no longer move and slows down near Okinawa.

The westerly wind in the sky repeatedly moves southward and northward, but
If you get on the westerly wind at the timing when the westerly wind goes south
A typhoon may approach the vicinity of Honshu.
In addition, the possibility of the occurrence of linear rainfall belts is also fully conceivable.

[Prepare for heavy rain early]
Widespread heavy rain is expected from Monday onwards.
Prepare for heavy rain on Sunday while it’s sunny.
There is also the possibility of the rainy season coming next week.

*Please always check the latest information for typhoon information.

Saturday Station May 27 OA

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