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Black Clouds as Seen in a Picture Book

    When we drove a car on Rt. 18 in Annaka city, Gumma Pref. in Japan towards Nagano, we came occasionally under big black clouds at 16:00, Sep. 23 (Fri.), 2011.
    In this year, heat of late summer continued till Sep. 18, 2011.   Subsequently, the typhoon No.15 landed in Japan, and passed through slowly in the length direction of north Japan in three days since Sep. 19, 2011.   After the typhoon passed away from Japan in the north direction at 16:00 in Sep. 22, 2011, cold air current began to flow from Northern Asia continent (in another word, Siberia).
    So, big black clouds were yielded by the temporary winter weather as seen in the following pictures.


 (If clicked, you can see by expansion.)
Black clouds like ones which may
come out in a picture book for kids.

Around Simo-Nojiri intersection On Rt.18 in 4-Chome,
An-naka city, Gumma Pref. Japan.
Our way leads to Usui-toge mountain pass.
16:00, Sep. 23 (Fri.), 2011
When winter seasonal wind begins to blow,
such clouds seem to tend to come out in this area.



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Updated: 2011.09.25, edited by N. Yamamoto.
Revised on Jul. 18, 2016, May 05, 2020, Jan. 30, 2021, May 15, 2021 and Mar. 22, 2022.