Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
SLIGHT 157,966 11,439,129 Omaha, NE...Minneapolis, MN...St. Paul, MN...Lincoln, NE...Madison, WI...
MARGINAL 151,755 11,679,371 Milwaukee, WI...Aurora, IL...Rockford, IL...Naperville, IL...Joliet, IL...