Clouds of the Day - April 30, 2020

Contrail - After a day with no clouds in the sky a lone contrail (condensation trail) moved overhead during the evening. Condensation trails form when water vapor in jet engine exhaust condenses as ice crystals. Sometimes contrails may overspread most of the sky. In this case the contrail remained as a single line. It moved from the western sky to the east with little change in its shape.