This would probably be a good week to click on the hint.fm moving wind map, linked here, from time to time. I’ve used it on this Saturday night to plot out the wind patterns going into our weather the next few days — click here for the still map from about 11 p.m. Saturday night, though, as always the moving wind map is far more interesting and instructive. First, there is a cold front nearing the East Coast as I type this. We are seeing some breezy northwest winds behind the front. But you’ll notice the white lines aren’t all that bright nor are they all that long. That signals that this front is not bringing a major blast of Arctic air, as the winds do not connect to the source region of the Arctic air, and they are not that strong. Still, some 30s to low 40s lows will be common both Sunday and Monday mornings across Southwest Virginia, maybe a few upper 20s in some outlying valleys, wtih scattered frost possible by Monday AM. The arrows on the map show southwesterly wind flow in the center of the nation, and this return flow will lead to slightly milder temperatures for us by Monday and Tuesday, and may actually arrive just early enough to limit frost potential for Monday morning. The bright lines gathering in the Northern Plains and Northern Rockies are the major blast of Arctic air that arrives late Tuesday or early Wednesday. This is when much colder air arrives, likely even accompanied by some mountain snow showers. By the end of the week, 50s highs and 30s lows will be common, and we still may go a notch below that on a day or two with 40s highs and 20s lows, especially west of Roanoke. Keep an eye on this wind map through the week to see the progress of the front.