IEM Daily Feature
Friday, 27 December 2013

Back above freezing after low

Posted: 27 Dec 2013 05:44 AM

After very cold low temperatures on the 24th, highs the next day were back above freezing! The featured chart presents the frequency of having an above freezing high temperature for at least one of the three days following a day with the given low temperature. A linear relationship exists until temperatures reach negative five or so and then the frequencies flatten out. This would indicate that it does not matter how cold temperatures get once they are below negative five. The physical reasoning for this may be that cooling below this level is a local radiation effect and not indicative of a more intense cold air mass which would decrease the chances of returning to above freezing temperatures in the near term future.

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Tags:   lows   winter