IEM Daily Feature
Friday, 19 July 2019

Heat Index Chart

Posted: 19 Jul 2019 05:24 AM

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PDF Version of featured chart.
Unlike Wednesday, storms were not able to save the state from oppressive heat and humidity Thursday afternoon with the entire state reaching at least 100 degrees for heat index. The heat index is a rather interesting expression of how miserable it is outside. It is an estimate that has many caveats and assumptions. There are many different heat index equations out there in the wild. The featured graphic, which you are free to use, presents the NWS Heat Index equation values for a given temperature and relative humidity. The chart is capped at about 137F as while heat index values are calculated with larger values, there is a matter of practicality if those large of values are accurate or are even obtainable.

Good = 20
Bad = 31

Tags:   heatindex