SFGATE: Winter ‘bomb-cyclone’ could produce a minus-100-degree wind chill

Winter ‘bomb-cyclone’ could produce a minus-100-degree wind chill Published on January 06, 2018 at 03:59AM by Bryan Logan, provided by Amir Levy/Getty Images An Arctic air mass enveloping parts of the Northeast US on Friday sent temperatures below zero in some areas. The frigid weather is the byproduct of a bomb cyclone and polar vortex …