IEM Daily Feature
Monday, 17 September 2012

Maximum after last Maximum

Posted: 17 Sep 2012 05:38 AM


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numbers plotted are the difference of average from threshold
This weekend saw very pleasant temperatures with highs in the upper 70s and 80s. A cold front is set to bring a regime change to our weather today. Will this be the last we see of the 80s? The featured chart looks at the warmest high temperature after having a high temperature at or above a given threshold for the period including the rest of the calendar year. The maximum, average, and minimum of these yearly values is presented. The point of the chart is that typically these temperature step-downs in the fall happen in about 3-5 degree increments. The minimum values show that some years can see dramatic changes with highs in the low 70s and then not broaching 50 degrees for the rest of the year. These events happen much later in the year than September.

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Tags:   highs