With smoke from the "Let Burn" fires a concern, here is what to expect. The smoke will blow out west in the evening as down canyon (west) winds happen at night. In the morning once it warms up the east winds pick up and will blow the smoke up canyon, east.

This photo was taken early on 6/29/09 and shows the effect of the evening winds that blow down canyon, west. You are looking east into Yosemite Valley on the left and the Grouse Creek fire on the right. You can see how the smoke has settled into the Lower Merced River Canyon down by El Portal and Yosemite Lodge. Now once the day east winds pick up the smoke will start to blow into Yosemite Valley on the left. The smoke blew up east almost all the way to Olmsted Point by Tuolumne Meadows yesterday.

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