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The SituationHere's something not many of us get to see, unless you live near Mount St. Helens and get out of bed at sunrise.St. Helens continues to spew ash while its forming a lava dome in the crater and keeping us on our toes with minor tremors (which are really exciting when hiking there!) Here, in these sunrise shots, she appears to be blowing smoke rings. Anything so benign is welcomed given recent history.
The smoke rings are formed by cooler air flowing over the crater being pushed up into the atmosphere by warm air from the crater, as it goes up and over the top. The moisture content and initial temperature are just right to cause the moisture to condense from a vapor state to small water particles at the higher altitude. Then, when the now heavier air moves past the peak on it's downward path, the particles evaporate back to an invisible vapor. Absolutely clear, right?
The two "pancakes" you see describe two layers of air, both the warmer and the heavier, thus making these awesome pictures possible.
Credit Where Credit Is DoI did not take these pictures; however, the person who did remains unknown. A local friend sent them to me by e-mail. They are just too spectacular to keep a secret!