Coldest Temperatures: Single Stage Snow Throwers 02/13

Single-stage snow throwers use a single high-speed impeller to both move the snow into the machine and force it out of the discharge chute. The impeller is usually in the form of two or more curved plastic paddles that move snow towards the center line of the machine where the discharge chute is located. Single-stage snow throwers usually are light-duty machines. Small electric machines can be picked up manually to chew away deep snow.

A man in Flint, Michigan, carries his shovel while walking through the drifting snow on Monday: The deep freeze is to blame for an estimated 13 deaths so far

In Minnesota, officials took the rare step of closing all of the state’s public schools on Monday – the first time in 17 years. Schools across Chicago, Milwaukee and St Louis were also closed, while officials in Washington D.C. and as far south as Atlanta have announced school closures for Tuesday. With wind chill warnings stretching from Montana to Alabama, much of the U.S. is experiencing the coldest temperatures in almost 20 years, according to the National Weather Service. They are expected to be 30 to 50 degrees below average in some cities – and the deep freeze is expected to last into Tuesday.