Europe is warm (Fig1). Atlantic air flows smoothly East (discussed HERE), setting the “Siberian Express” in motion, pushing Artic air to NorthEast of the U.S. (Fig.2) That had been already the case last year (MORE) and now again this year (Fig. 3, 4):
Bitter Temperatures to Put Northeast Under Deep Freeze on Valentine’s Day (nbcnews – Feb.14/2016)
Bitter temperatures flirted with record lows on Sunday as “life-threatening” conditions put millions across the country in a deep freeze for Valentine’s Day. More than 38 million people from the Plains into the Midwest and East Coast were under winter-storm warnings or advisories
overnight, according to The Weather Channel. The coldest air mass of the winter brought the thermometer down to minus 6 degrees overnight in Minneapolis, while New Yorkers were urged to take “extreme precautions” against wind chill.
NYDAILYNEWS 02/15/2016: While New York City had its coldest start to Valentine’s Day in 100 years on Sunday, it would seem balmy compared with the wicked wind chill at upstate Whiteface Mountain. As temperatures dropped across the Northeast from the blast of a polar vortex, the wind chill at Whiteface, near Lake Placid, made it feel like a body- and mind-numbing minus 114 degrees (-81° C) late Saturday and into Sunday. Central Park could only muster a minus 1 degree.