The MASSIVE continent-sized pool of Siberia-like frigid air stretches this moment from Saskatoon, SK (Canada) all the way down to just north of Jacksonville, Florida, and out just past the Atlantic Coasline of North America.
I'm afraid this will be the climate regime for roughly this same region up till mid April. Though, the extent south of this massive pool of Arctic air will probably only reach ~~North Carolina during the next several Arctic invasion-weeks. Looking at the long-term experimental (which has been absolutely correct for this entire winter, by the way, climate-casting at the continental scale, remember; not at the meso-scale!), the enormous air mass (along with the northern branch jet) will abruptly retreat far north somewhere from April 8th to April 15th, where we will abruptly warm up into summer-like conditions (extremes: the norm for the rest of our lives)...