Pollen information: Take precautions today. Increase in pollen from tomorrow. High levels in Tokyo. Peaks in some places from late February.
February 13, 2024 07:19
Today, the 13th, it will be sunny and there will be a lot of pollen from Tohoku to Kyushu. If you have hay fever, please take precautions. Starting tomorrow, the 14th, the amount of airborne particles in Tokyo will be “somewhat high” or “high”. This weekend, Kochi and Fukuoka will also see an increase in the amount of air dispersion.
Today is the 13th, take some measures, even if they are few.
Today, the 13th, it will be sunny and sunny, and the daytime will be warm like the beginning of spring.
Pollen is expected to fly from Tohoku to Kyushu, albeit in a “small” amount. If you have hay fever, it is a good idea to take measures such as wearing a mask.
Pollen is starting to disperse in earnest, so take all possible measures
From now on, there will be many warm days ahead of the season, and pollen will begin to disperse in earnest.
The amount of pollen scattered in Tokyo is likely to be “slightly high” or “high” starting tomorrow, the 14th. The amount of pollen scattered will increase rapidly. Kochi and Fukuoka are also expected to experience a “slightly higher” number of cases this weekend.
If you have hay fever, please take all possible precautions.
When does it peak?
The peak period for cedar pollen scattering will be from late February in Fukuoka, Takamatsu, and Tokyo, and from early March in Hiroshima, Osaka, Nagoya, Kanazawa, and Sendai. The peak period is expected to last from 10 days to a month.
If there is a day when the wind is strong and it suddenly becomes warm, like the first blow of spring, the amount of pollen dispersed will increase all at once, and the peak time may be brought earlier. It’s a good idea to take thorough measures against pollen even before it reaches its peak.
Spring 2024 Pollen scattering trends in each region
Compared to previous years, pollen scattering trends in each region are 100% in Shikoku and Kanto-Koshin, which is the same as usual, in Kyushu, Chugoku, Kinki, Tokai, Hokuriku, and Tohoku, it is slightly higher at 120-140%, and in Hokkaido, it is over 200%. That’s a very high prediction.
Compared to the previous season, Shikoku, Chugoku, Hokuriku, and Kanto-Koshin are expected to be low at 50-60%, Kyushu and Kinki are expected to be slightly lower at 70%, and Tokai are expected to be at 90%, which is the same as last season. In Tohoku, the number is high at 150%, but there are large differences depending on the region, with southern Tohoku having a low rate and northern Tohoku having a very high rate. Hokkaido is expected to have a very high rate of over 600%.
Conditions that make pollen easy to fly
There are three main conditions under which pollen tends to fly.
① “A sunny and hot day”
Male cedar flowers open more easily when the temperature rises. Furthermore, on sunny days with high temperatures, updrafts are likely to occur, making it easier for pollen to fly up.
② “A day when the air is dry and the wind is strong”
When the humidity is high, pollen absorbs moisture and becomes heavier, making it difficult for it to fly far. On the other hand, on days when the air is dry and windy, pollen is more likely to fly from forests far away from urban areas, so you need to be even more careful.
③ “After the day after rain or after 2-3 consecutive days of high temperatures”
The day after a rainy day, more pollen is likely to fly because the amount that was not dispersed on the rainy day and the amount that was dispersed on that day overlap. In addition, pollen that falls on the ground due to rain may be blown up, increasing the amount of pollen scattered. Also, even after two to three days of high temperatures, more pollen is likely to fly.
If you suffer from hay fever, check the daily weather forecast and prepare for pollen.
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2024-02-12 22:19:35
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