To move a tile into the empty space, click on the tile to be moved. If you think you need a hint to see how the image should look, click here.
Lenticular, or lee wave, clouds form downwind from an obstacle in the path of a strong air current. In the Boulder, Colorado, area, the obstacle is the Front Range of the Rocky Mountains. Lenticular clouds can often be seen along the lee side of the range. © University Corporation for Atmospheric Research, Photo by Carlye Calvin. Want to know more about weather? Go to JetStream - an Online School for Weather.