IEM Daily Feature
Thursday, 09 March 2023

Winter Sub-Zero Low Days

Posted: 09 Mar 2023 05:30 AM

Even with a snow producing winter storm today, temperatures will not be all that bad and the near term forecast does not have much for extreme cold for early March. The featured chart checks in on the winter season (Dec through Feb) total number of days with a daily low temperature below 0 degrees Fahrenheit for a site near Elkader (far NE Iowa). This particular site is notorious for having the coldest temperature in Iowa during the winter season thanks to its location in a valley with cold air settling in during calm conditions. The chart also plots a simple period of record average and a linear fit trend line, which does not show much trend for this site. The most recent two decades have seen both extremes of having many or few such days each winter season.

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