ROANOKE, Va. – Wednesday night, clouds from Dorian helped produce an amazing sunset across our area. Thursday morning, those clouds are doing a little something else.
If you're within close proximity to mountains, you may notice the clouds taking on the appearance of water rippling. These clouds are referred to as 'undulatus asperatus.'
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Clouds form when the air rises to a point where the air becomes saturated (wet). Wind from the east on the outer edges of Dorian then blows across that rising air.
You then get a repetitive rising and sinking motion in the air that results in these waves.
Keep an eye out for these Thursday, and send us pictures if you see them around.