Click on DLH..
http://www.rap.ucar.edu/weather/surface/
I have experience much colder though..
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The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K.

According to the National Weather Service in Sioux Falls, this morning’s low temperature of minus-19 the coldest the city has seen in eight years. With wind chills being even colder, it can be even more dangerous to be outside for extended periods of time.
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