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Cooperative Institute for Research in Environmental Sciences <br />UNIVERSITY OF COLORADO BOULDER and NOAA <br />Deterministic forecast: <br />–no ensemble forecasts <br /> <br />Time-and space specs: <br />–1- to 7-day lead time <br />–24-hour periods run 6z to 6z <br />–HRAP grid (~2.5 kms) <br /> <br />Penman-Monteith (ASCE): <br />–12-cm grass reference crop <br /> <br />Drivers: <br />–sensible weather elements from coupled NWPs <br />•Tmax, Tmin <br />•RHmax, RHmin <br />•10-m wind speed <br />•Sky (cloud cover %) <br />drivers forecasted by loading data from a model (or <br />blend of models), expertly tweaked for consistency <br />with neighboring WFOs / specific local conditions, <br />- e.g., for wind: may load local WRF data and <br />then increase areas in the Delta for Delta breeze. <br />Forecast estimate of ET0 for 24-hour period: <br />Short-term forecasting of ET0 <br />NWS 1- to 7- day forecast ET0 (FRET) product <br />RH = relative humidity