Cirrus Rows

July 30, 2020

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Photographer: Sally Budack 
Summary Authors: Sally Budack; Jim Foster

Driving near my home in Tacoma, Washington, several weeks ago I noticed a curious cloud formation with oddly regular stripes. I pulled over to take the picture shown above. These clouds dissipated quite quickly. They appear to be a type of cirrus cloud (cirrus fibratus) that tends to become oriented in the direction of the upper air flow, resulting in parallel rows -- like window blinds to the upper atmosphere. Photo taken on June 11, 2020.

Photo Details: Camera - Apple iPhone 6s; Exposure Time - 0.0001s (1/8547); Aperture - ƒ/2.2; ISO equivalent - 25; Focal Length (35mm) - 146.