Calculate the Heat Index from the current temperature and relative humidity.
The implementation uses the formula outlined in [Rothfusz1990], which is a
multi-variable least-squares regression of the values obtained in [Steadman1979].
Additional conditional corrections are applied to match what the National
Weather Service operationally uses. See Figure 3 of [Anderson2013] for a
depiction of this algorithm and further discussion.
temperature (pint.Quantity) – Air temperature
relative_humidity (pint.Quantity) – The relative humidity expressed as a unitless ratio in the range [0, 1].
Can also pass a percentage if proper units are attached.
pint.Quantity – Corresponding Heat Index value(s)
mask_undefined (bool, optional) – A flag indicating whether a masked array should be returned with
values masked where the temperature < 80F. Defaults to True.
Changed in version 1.0: Renamed rh parameter to relative_humidity