This thunderstorm was seen at sunset near Abilene, Texas on May 17, 1978.
During this 1982 thunderstorm, when the rain-cooled air moved out ahead of the storm, it went under warm moist air, creating a shelf cloud. Notice the bright light blue sky at the top of the picture and the dark gray-black color of the sky below.
A severe thunderstorm in the distance over Elko, NV
This thunderstorm, including a shelf cloud out in front, moved into Rockfish, NC on June 27, 2006.
This thunderstorm shows a shelf cloud that passed over Little Chute, WI on June 13, 2004.
Notice the lightning that is part of a thunderstorm that was seen in Menomonee Falls, WI on July 3, 2001.
This photo of a thunderstorm shows large bursts of lightning in the cloud. It was seen in South Milwaukee, WI on August 1, 2002