(CNN) — Drenching storms sweeping through the East Coast on Thursday could unleash significant flash flooding, damaging wind gusts and a tornado or two.
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The flooding rainfall risk level was increased from a Level 2 to a Level 3 of 4 in New York City, parts of New Jersey and eastern Pennsylvania, including Philadelphia, on Thursday afternoon. This is where “numerous instances of flash flooding are likely,” the Weather Prediction Center said…