Cedar Rapids had its coldest low temperature for the season on Friday at 16 degrees and then followed it with a record tying low of six on Saturday morning. These two events can be accounted as "step- downs" in low temperature for the season and the featured chart presents this metric. The top panel shows the number of such events per season, the middle panel shows the frequency at a given temperature for them to occur, and the bottom panel shows the frequency by day of the year. Since this metric starts on 1 July, there's an artificial blip around then until the data settles down. The total this season still is well below average and at the bottom of the long term range, so it seems very likely that further step downs will occur. It is interesting to note how the daily frequency starts to drop down by the end of December, but is still non-zero until later in March.

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