This week’s satellite image was taken this morning over the Mid-Atlantic. Notice the checkerboard of clouds; these are interfering mountain-wave patterns as the winds pass over the Appalachians. The mountains can disturb the flow enough that under the right conditions, some areas of lift will show clouds, but then areas of sinking air will mix them out. The spacing of these rows can be used to estimate wind speed at this level as well.
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Satellite Imagery comes from: NASA MSFC Earth Sciences Office