Moonrise, Sierra Wave Cloud. Yosemite National Park, California. July 15, 2016. © Copyright 2016 G Dan Mitchell – all rights reserved.
A Sierra wave cloud stretches south along the Sierra Nevada crest as the moon rises.
Spend a bit of time — or a few decades — in and around the Sierra and you begin to be able to anticipate certain events. Nothing is a sure bet when it comes to predicting spectacular visual conditions, but some signs make it very likely that your efforts may be rewarded. The “Sierra Wave” cloud phenomenon is one such condition — common, easy to spot once you recognize the signs, and having the potential to produce very special photographic opportunities.
As on this evening, it often begins subtly. The line of clouds is produced over the crest or on its leeward side as moisture-laden air passes above the crest. The clouds can extend many miles north and south and sometimes stack up in layers. During the day they are impressive, but it is at dusk (or, rarely, at dawn) that they excel. After the last direct sunlight has risen above the highest peaks and the sun has set, brilliant red light may illuminate the clouds from the west, producing an almost unbelievable intensity of color. On this evening I saw the potential as I came over Tioga Pass from the east, and I quickly found a place to stop and watch the show develop. The moon above Kuna Crest was an added bonus!
G Dan Mitchell is a California photographer and visual opportunist. His book, “California’s Fall Color: A Photographer’s Guide to Autumn in the Sierra” is available from Heyday Books and Amazon.
Blog | About | Flickr | Twitter | Facebook | Google+ | LinkedIn | Email
All media © Copyright G Dan Mitchell and others as indicated. Any use requires advance permission from G Dan Mitchell.