Rain and snow mixed and snow. Though no "official" criteria exist for the term, in the United Kingdom the term is not used when any significant accumulation of snow on the ground takes place. It is often used when the temperature of the ground surface is above , preventing accumulation from occurring even if the air temperature is marginally below ; but even then, the falling precipitation must generally be something other than exclusively snow. In the United States, wintry mix generally refers to a mixture of freezing rain, ice pellets, and snow. In contrast to the usage in the United Kingdom, in the
Wilkes County, North Carolina spring and summer months; and rain, snow, sleet, and freezing rain all occur at times during the winter, with the frequency increasing with the altitude. Severe weather is not common in Wilkes but does occur. Tornadoes are rare, but severe thunderstorms can bring strong winds which can down trees and power lines, as well as cause hail. In October 2017, a rare EF 1 tornado touched down in the towns of Wilkesboro and North Wilkesboro, and then moved through the Mulberry, Fairplains, and Hays communities, causing significant damage. Wilkes County is far enough inland that hurricanes rarely cause problems, but