#Polarvortex predicted to strengthen. If strengthening continues or reverses in the next few weeks is critical for rest of winter's weather. pic.twitter.com/IpO3t9XVmh— Judah Cohen (@judah47) December 18, 2016
#Polarvortex predicted to strengthen. If strengthening continues or reverses in the next few weeks is critical for rest of winter's weather. pic.twitter.com/IpO3t9XVmh