Checking in on the medium range forecast, the GFS Super Ensemble continues with a signal for major cold and storminess in the Central and Eastern US. The wintry pattern really settles in after 1/25 as the tropospheric polar vortex sinks southward toward James Bay and elongates. pic.twitter.com/2p7DTRJZ1U

— John Homenuk (@jhomenuk) January 18, 2019