A small amount of cedar pollen was observed in Tokyo even before it started dispersing. When will the full-scale dispersion and peak occur in various places? (Weather forecaster Tomomi Yoshida January 27, 2024) – Japan Weather Association tenki.jp
Cedar pollen: A small amount observed in Tokyo even before it started dispersing. When will the full-scale dispersion and peak in various areas start?
January 27, 2024 15:29
The season for scattering cedar pollen is approaching. Although pollen has not yet started dispersing in Tokyo, a small amount of pollen is flying around. This year’s cedar pollen season is expected to be about the same as usual or start earlier than usual. Take early measures.
A small amount was observed in Tokyo even before it started dispersing.
In Tokyo, cedar pollen has not yet started scattering* this season, but a small amount of pollen is flying around.
According to data from the Tokyo Metropolitan Health and Medical Bureau’s “Tokyo Allergy Information Navi.”, the cumulative value of cedar pollen since January 4th is 0.6 pollen/cm2 in Chiyoda, 1.8 pollen/cm2 in Katsushika, and 2.1 pollen/cm2 in Hachioji. , 3.0 pieces/cm2 in Tama (values as of January 22nd in Chiyoda, January 24th in Katsushika, and January 25th in Hachioji and Tama).
*The scattering start date is the first day when one or more cedar pollen particles per square centimeter was observed for two consecutive days.
When does scattering start?
The cedar pollen season will be about the same as usual or start earlier than usual.
Cedar pollen is expected to start scattering in parts of Kyushu, Shikoku, Chugoku, Tokai, and Kanto-Koshin in early February. The dispersal will start in mid-February in the Kinki region, mid-to-late February in Hokuriku and southern Tohoku, and early to mid-March in northern Tohoku.
When is pollen at its 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, such as the first blow of spring, the amount of pollen dispersed will increase at once, and the peak time may be brought earlier. It’s a good idea to take thorough measures to prevent pollen even before it reaches its peak.
This season’s pollen scattering trends
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 lot of predictions.
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, it is as high as 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%.
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2024-01-27 06:29:52
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