Wind chill is calculated from: http://www.nws.noaa.gov/om/winter/windchill.shtml Heat index from: http://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml
If you think there's an error, an example would be in order. -tk On Tue, Oct 3, 2017 at 11:10 AM, jahfly1000 <[email protected]> wrote: > ok thanks i test that. > I am wondering about the calculation of heat index and wind chill, the > calculations seems to me not correct. the software tells me the same > temperature as my probe, nothing is calculated. > this formula can be used for wind chill only when the ambient temperature > is between -50 ° and 10 ° > > > RC = 13, 12 + 0, 6215 T C + (0, 3965 T C - 11.37) × v k m / h 0, 16 > > RC = wind chill > TC = room temperature > v = wind speed in km / h > > if not more than 10 ° take into account the heat index with this formula > > HI = c1 + C3I C2T + + + c4TR c5T² c6R² + + + c7T²R c8TR² + c9T²R² > > > H I = Heat Index (° F) > T = air temperature (° F) > R = relative humidity (0 to 100) > c1 = - 42.379, c2 = 2.04901523, c3 = 10.14333127, c4 = -0.22475541, > c5 = -6.83783 × 10 -3, c6 = -5.481717 × 10-2, c7 = 1.22874 × 10-3, c8 = > 8.5282 × 10- 4, c9 = - 1.99 × 10 - 6. > > thanks again > > -- > 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 [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
