Lenticular cloud, 莢狀雲

Unidentified flying object? The 54-year-old snapped these pictures above Loch Broom of the rare lenticular clouds, which are created in certain conditions when air is pushed upwards by a mountain.

They are one of the most common causes of UFO reports but tend to be rare in the UK
Saharan 'blood rain' dust cloud hits Britain as temperatures soar... but rain is expected for the weekend | Daily Mail Online
Read more: http://www.dailymail.co.uk/news/article-3033291/Get-ready-heat-smog-Today-hottest-day-year-22C-watch-dirty-air-Continent-make-hard-breathe.html#ixzz3WwHmiVvS
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Lenticular cloud - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Lenticular_cloud
莢狀雲 - 維基百科，自由的百科全書
http://zh.wikipedia.org/wiki/%E8%8D%9A%E7%8A%B6%E4%BA%91

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