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Under what conditions can "back side weather" ("Rückseitenwetter") be expected?

  • A

    After passing of a warm front.

  • B

    During Foehn at the lee side.

  • C

    Before passing of an occlusion.

  • D

    After passing of a cold front.

Refer to figure.
"Back side weather" refers to a brief weather phenomenon after the passage of a cold front. Yhe atmosphere is still very unstable and often shows short-term rain showers, but it can also develop into fair weather lasting for a few hours.

Under these conditions, with still moist ground, sunlight leads to the rapid formation of cumulus clouds. Since the air pressure rises again after the front has passed and the air becomes relatively less humid, it is exceptionally clear and visibility is very good.

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