Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
SLIGHT 24,373 221,005 Rapid City, SD...Spearfish, SD...Rapid Valley, SD...Sturgis, SD...Belle Fourche, SD...
MARGINAL 147,632 13,318,236 Baltimore, MD...Washington, DC...Richmond, VA...Arlington, VA...Alexandria, VA...