Color Wave - Helena

An amazing sunset overlooking Helena! A chinook arch cloud stretched across the entire state of Montana tonight and set off a mighty glow over the Queen City of the Rockies as the sun set behind the Continental Divide.
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A chinook arch is a band of stationary stratus clouds caused by air rippling over the mountains and usually forms on the lee (downsloping) side of a hill. They often indicate very high winds aloft and warm gusty winds at the surface.
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They often can make for fantastic sunsets or sunrises - would you agree?