Why did Davis choose a ten minute average for wind speed?
You’d have to ask them. METARs and the World Meteorological Office standard is 2 minutes. The ten-minute average artifically reduces the average wind speed. It is worthwhile noting that when using WeatherLink, the average wind speed in the record is taken at various sampling rates depending on the archive period you have selected. Oversimplified, the shorter your archive period, the more often wind speed is sampled. The WeatherLink help file describes the sampling rate. The ten minute period is probably another “undocumented feature” intended to save battery life and memory so there was room to put messages like “IT’S RAINING CATS AND DOGS” on the console…
