Categorical Graphic Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area SLIGHT 86,228 27,949,623 Baltimore, MD...Charlotte, NC...Washington, DC...Greensboro, NC...Winston-Salem, NC... MARGINAL 373,287 61,827,790 New York, NY...Philadelphia, PA...Boston, MA...New Orleans, LA...Atlanta, GA... Probabilistic Tornado Graphic Probability of a tornado within 25 miles of a point. Hatched Area: 10% or greater probability of EF2 - EF5 tornadoes within 25 miles of a point.