Weather warning as 'arctic express' jet stream is set to blast dozens of states with sub-zero temperatures
The 'arctic express' is set to blast the Eastern US with another round of frigid air this week, sending temperatures plummeting 10 to 20 degrees F below average. The jetstream will carry a blast of cold air through the Midwest, Northeast and Southeast starting January 15, with some states experiencing temperatures that feel as low as -30F. However, heavy lake-effect snow — which occurs when cold air moves over the relatively warm surface of a lake — could fall downwind of the Great Lakes, and some snow squalls may hit midwestern and northeastern states.
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