Roger's SkyPix

Gallery of Outflow

Serrated Arcus

Serrated Arcus

[Part 2 of 4] A high-based, sharply defined, jagged-edged shelf cloud surges southeastward over the high plains of eastern Colorado. In this region, a lack of richer subcloud humidity and haze usually helps to reduce the condensation down to a very sculpted form, representing only the strongest fingers and slabs of lift. It's an exhibition of convective starkness, an efficiently constructed cloudscape that is free of the low-visibility grunge and scuddy material often accompanying outflow surges in more moist areas. As a result, the complex cloud-base textures and subtle varieties of storm coloration can quilt together a sky that is amazing to behold.

3 NNW Sheridan Lake CO (18 Jun 11) Looking NE