I've developed a nice Weather view in my data field - all the basic insight. Color-coded arrow (green if a tailwind, red if a headwind, black crosswind).
As the summer approaches, here in Central Florida, where the Heat Index is usually over 100 deg F due to the humidity... I'd like to add Heat Index to my Weather view.
My challenge is there are many different formulas for calculating this. Ref: https://en.wikipedia.org/wiki/Heat_index
Any guidance in how to deal with these variables? Especially the direct sun situation?
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For example, some references suggest Heat Index only applies over 80F and 40% RH.
The formula below approximates the heat index in degrees Fahrenheit, to within ±1.3 °F (0.7 °C). It is the result of a multivariate fit (temperature equal to or greater than 80 °F (27 °C) and relative humidity equal to or greater than 40%) to a model of the human body.
Others say >= 70F.
An alternative set of constants for this equation that is within ±3 °F (1.7 °C) of the NWS master table for all humidities from 0 to 80% and all temperatures between 70 and 115 °F
Another challenge is Heat Index can add up to another +15F if you are exposed to direct sun (which is often the case cycling mid day).
The other major factor is sunshine; standing in direct sunlight can add up to 15 °F (8.3 °C) to the apparent heat compared to shade.