The warnings of severe thunderstorms in the New York area started coming in Thursday afternoon. But anyone outside who looked up didn't need to hear it from the National Weather Service - the sky told them.
Dark clouds - and then lighting - provided awe-inspiring images around the region.
"The brunt of the storm itself was intense but short," iReporter Matthew Burke of New York City said. "There was very strong rain and wind for about 15 minutes, at which point the rain cleared and the lightning show began."
The storms that hit central New York were severe, and wind gusts that may exceed 80 mph were forecast for metropolitan New York City and expected to arrive Thursday night.
Did you snap photos of Derecho? Share your images with CNN.