Hi, Actually what you are seeing is not heatindex being stored as windchill but rather heatindex and windchill being set to outTemp. I am not intimately acquainted with the NOAA heat index and wind chill calculations (in Australia we tend to use apparent temperature) but you will find that the NOAA formulae have a caveat that they provide meaningless results outside certain meteorological conditions. For wind chill the calculation is only valid for temperatures <= 50F and wind speeds > 3mph <https://www.weather.gov/safety/cold-wind-chill-chart>, for heat index the calculation is only valid for temperatures >= 80F and humidity >= 40% <https://www.wpc.ncep.noaa.gov/html/heatindex.shtml>.
In cases where wind chill and heat index calculations are invalid WeeWX uses the outTemp value. For the values provided heat index and wind chill calculations will be invalid and I strongly suspect WeeWX has used the outTemp value instead. Gary On Monday, 14 October 2019 04:37:50 UTC+10, Hyrules Hyrules wrote: > I have been reading about heat index and looking at the NOAA formula to > calculate the heatindex but it seems there is something wrong in the > archive table as it stores the heatindex as the windchill value. Is this a > bug ? I'm using a vantage pro 2 and MySQL to store data. Thanks. > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/09893409-306f-41e9-b2bf-09906b53b687%40googlegroups.com.
