Siberian express

SIBERIAN EXPRESS A fierce, cold flow of air that originates in Siberia, then moves into Alaska and northern Canada before moving southward into the United States.

Siberian Express: An Arctic Air Mass which developes over the Arctic or near Siberia, Russia. They contain extreamly frigid temperatures well below zero and are fast moving.

See also: Meteor, Advection fog, Advection, Low, Norther