An unseasonably late frost threatens early blooming plants and Asheville's budding vineyards, according to the National Weather Service (NWS) in Greenville-Spartanburg. The cold snap, expected late Thursday night into Friday morning, could send temperatures plummeting into the high 20s and low 30s, a sharp contrast to the mild weather earlier in the week. The NWS warns that fruit trees and grape vines, already budding because of the recent warm spell, are particularly vulnerable. These young bud