Categorical Graphic Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area SLIGHT 75,087 48,497,883 New York, NY...Philadelphia, PA...Baltimore, MD...Washington, DC...Newark, NJ... MARGINAL 284,580 31,362,045 Dallas, TX...Fort Worth, TX...Boston, MA...Denver, CO...Virginia Beach, VA... 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.