This week we were in Northwest Arkansas on a very chilly morning.  It was eighteen degrees Farenheit, and the wind was blowing.  By mid-day, we travelled back south to the vineyard where the temperature had risen to 43 degrees, while it was still about 23 in the north.  We were reminded how much advantage there is for the muscadine vineyard to be on the south slopes of the Ozark Mountains, which provide a barrier to the colder air from travelling south so rapidly during arctic cold blasts.  Last night the temperature was four degrees Farenheit here, while it was -21 degrees at Northwest Arkansas Airport.  That's why muscadines don't grow in Northwest Arkansas--at least until a variety is bred to be able to withstand that sort of cold!