Mammatus1.jpg and Mammatus2.jpg were taken after a strong lightning
in the Front Range Mountains next to Boulder, Colorado.
Mammatus3.jpg and Mammatus4.jpg show the cloud minimum level of
a thundercloud. It was taken directly after an intense, short shower
associated with significant air cooling which is the precondition
for the formation of the mammatus dents.
Mammatus5.jpg: The clouds belong to the precursors of a Tornado
cell which passed the location of the photographer shortly after
CuCon1.jpg to CuCon5.jpg presents views of a Cumulus congestus cloud
around 9 p.m. "Mammatus" structures were built underneath.
The last two images display the border of the cloud where the cloud
In the artwork "Cornfield with Cypresses" by Vincent
Van Gogh mammatus dents can be also clearly noticed, especially
at the right picture side. Apparently the artist had a scene in
mind which was similar to the one shown in Mammatus1.jpg. This canvas
was created in Saint-Remy in June 1889 and is exhibited in the National
Gallery of London today.
Mammatus1+2.jpg: S. Borrmann, Rocky Mountains next to Boulder,
Colorado, USA, Summer 1991
Mammatus3+4.jpg: S. Borrmann, Johannes Gutenberg University, Mainz,
Germany, July 2001
Mammatus5.jpg: M. Ebert (University of Darmstadt), District University
City of St Louis, MO, USA, 6 May 2003, in the afternoon
CuCon1.jpg to CuCon5.jpg: S. Borrmann, Ingelheim, Germany, July
Vincent Van Gogh, "Cornfield with Cypresses", Oil, 72.5
cm x 91.5 cm, 1889, National Gallery von London