The GFS is predicting an anomalously possibly record weak #polarvortex (PV) the last week of October. Does this favor a weak PV/#cold #winter or strong PV/#mild winter? I share my thoughts in today's blog & show the first Siberian #snow cover extent plot: https://t.co/Gg8N2KHLUk pic.twitter.com/DSVMTt92pS

— Judah Cohen (@judah47) October 11, 2021