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梅雨: Plum Rain

梅雨: Plum Rain_a0186568_22584812.jpgJapan is now in monsoonal rainy season so-called Baiu or Tsuyu. It is habitually middle June to middle~late July in Tokyo. We have much rain caused by stationary front between warm tropic Pacific high and cold polar Okhotsk high. Moreover typhoon Meari bring high humid wind from tropical monsoon in these 4-5 days. So south-western part of Japanese Is. were hit by heavy rain. Now it stimulate front, so north-eastern Japan is hit by heavy rain.

梅雨: Plum Rain_a0186568_22594661.jpg
These series of photos are taken on 21 June. Cirrus cloud (Ci) seems in higher background. It indicate that cold polar atmosphere covers over Japan.

梅雨: Plum Rain_a0186568_22321734.jpg



On the other side, Cumulus cloud (Cu) arise warm temperature by sunshine.

梅雨: Plum Rain_a0186568_22595661.jpg


Then large, tower-like Cumulonimbus cloud (Cb) appear on the front of large difference of temperature.
These pictures show instable atmosphere between warm tropical and cold polar.
2 days after, Pacific high become strong and extend. Then we had the hottest temperature in June in the last 20 years.
Now stationary front become active and move to south. So today we have a small rain. It will continue for 2-3days, according to JMA (Japan Meteorological Agency) forecasting...
After fluctuating weather, with decline of Okhotsk high and inflow of warm humid atmosphere from south, we will have much rain in July. It will be the end of Japanese monsoonal rainy season and beginning of mid-Summer.
by asiansophia | 2011-06-25 23:38 | 日々のできごと/ Daily life