Freeze Warning issued for North Carolina and Virginia mountains through Wednesday morning [Video]

A blast of cold, dry air raises frost and freeze concerns this week from the mountains to the Triad.The dry Canadian air has been steadily bringing down temperatures since Monday morning. Early morning temperatures are expected to dip into the 30s on several days this week, raising frost and freeze concerns areawide.The National Weather Service has issued a FREEZE WARNING for Alleghany, Ashe, Carroll, Grayson, and Watauga Counties from 2 a.m. until 10 a.m. Wednesday. Temperatures are expected to drop Tuesday night and Wednesday morning and remain in the lower 30s for several hours.WHAT TO EXPECTTemperatures will likely get colder both Wednesday and Thursday night, causing patchy frost to develop in the lower elevations.MOUNTAINSOvernight temperatures will fall into the low-to-mid 30s Tuesday through Thursday night. It will be cloudy and cold Tuesday night. Clouds will clear Wednesday and Thursday, raising the risk of a heavy frost or hard freeze.FOOTHILLSTemperatures are …