Fig. 3 was used to identify sixteen states (NY, MI, OH, WI, IA, MN, ND, NE, KS, MO, GA, TN, NC, IN, IL and ON) for winter, fourteen states (MI, NE, IN, IL, MO, OH, PA, KY, WV, VA, NC, GA, TN and MS) for transition, and eleven states (MI, PA, OH, IN, ...