A lenticular cloud has hovered over the state's tallest peak. Seen maybe a dozen times a year, it still looks cool every time. The cloud is formed when warm, moist air runs into the surface of Mt. Rainier. The mountain's topography forces the air upward, which cools and condenses the air -- turning it into a cloud.
As the air sinks back on the other side of the mountain, it dries out and the cloud dissipates. That's why it just hangs over the summit area.
Photos and explanation from KOMO News 4 in Seattle.
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