Subzero temperatures, high winds and drifting snow have closed schools and major roadways in Minnesota, with state officials cautioning against unnecessary travel. The Minnesota State Patrol and the Department of Transportation advise against venturing out in southern and western Minnesota today (MON). The National Weather Service has issued a wind chill warning statewide through noon Tuesday. Daytime temperatures of 10-below to 15-below are expected, with the wind pushing those readings to as much as 45-below zero. Minnesota Homeland Security and Emergency Management have been working with local officials to open warming shelters in several cities. National Guard armories in Albert Lea and Olivia are open to the public.