Coldest morning of the season for many

With high pressure directly overhead Monday night and early Tuesday, much of central and southern Minnesota along with western Wisconsin experiences their coldest night of season.  Now, it was not the coldest "feeling" night of the winter because many locations experienced calm winds through much of the night preventing it from feeling any colder, but actual air numbers were in the teens and 20's below zero in many areas.  This was a classic example of the urban heat island of the Twin Cities preventing the heart of the metro from experiencing the wicked cold that many around the metro were getting.  The urban heat island is the effect concrete and asphalt has on the local environment because they hold relative heat better than the natural environment like grass and trees.  This is very evident by just how cold it was in the outer suburbs, while the inner ring remained far warmer.  Here's a look at the lows from across the area…




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