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A really cool cloud swept over D.C. on Tuesday. Here's what caused it.
A long orographic cloud was visible from Fredericksburg to Annapolis around sunset on Tuesday.
((And I caught it; see it here, 60 miles south of DC: https://www.democraticunderground.com/12324370 ))
https://www.washingtonpost.com/weather/2022/03/02/dc-cloud-cool-orographic-lenticular/?