Crop Evapotranspiration

Hello Rachio community. I am trying to use the Racio and I can not seem to figure out how the system gets its projected “Crop Evapotranspiration” figure from. I work for a sod farm in Ventura County, California. We have our own weather station that gives me daily ETO’s that I compare to our local Cimis station. For some reason, Rachio figures are way off when we have wind events. Does anyone else see this issue?