Since 2012 the bud hardiness of the 12 most widely planted varieties in the Okanagan Valley has been reported biweekly from leaf fall to bud break revealing significant differences in cold tolerance among vinifera varieties (Bogdanoff et al. 2017).  These findings were confirmed with similar varietal bud hardiness data posted by WSU (WSU Research & Extension 2017).  The year to year consistency of vines sampled and the constant biweekly interval of this data also lent itself to the construction of an accurate varietal bud hardiness model (r² > 0.95) where its ultimate development would be a valuable tool for growers.  Based on daily average temperatures growers could use this model to predict their vineyard’s hardiness and thereby optimize wind machine usage and reduce grapevine winter injury.