ROCKLAND COUNTY, N.Y. (CBSNewYork) -- There was a real light show overnight in Rockland County.
One Twitter user posted video of near-constant ribbon lightning for about 20 seconds or so.
The violent weather was accompanied by a tornado warning for counties north of New York City, staring around 10 p.m. Monday.
Some twisting in the atmosphere was detecting, but there were no reports of anything touching down.
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