byp posted a photo:

Distinctive lines of clouds stretch out from the shore of the Aral Sea in this photo-like image captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite on March 12, 2009. While wave clouds like this are not unusual, this particular pattern over the Aral Sea is highly unusual. The clouds conform exactly to the shape of the western shore. (Source : NASA)