The 6z GEFS in 11-15 days shows more high-latitude blocking in the Arctic regions, which causes the 500mb polar vortex to elongate/drop south into Hudson Bay & SE Canada. If this trend continues, more arctic cold air will flow into the Eastern US, late in the month. pic.twitter.com/ON5gWjkaec

— Miguel Pierre (@mpierre19) January 8, 2019