. . "The original definition has been edited to conform to ENVO's textual pattern. Subjective/observer-based differentia (e.g. visibility) have been moved to comments. The NSIDC definition notes that blizzards involve snow reducing visibility to less than one-quarter mile (0.4 km) and are associated with dangerous blizzard conditions."@en . . . . "envoCryo" . "NSIDC blizzard"@en . . . "A blizzard which has 1) winds of 35 miles per hour (approximately 56 kilometers per hour), 2) lasts for a period of at least three hours, and 3) occurs in extremely cold temperatures."@en . . . "envoPolar" . "2020-10-14T20:13:10.917Z"^^ .