Just a quick note about the recent snowfall in central/northern Alabama and the southern and central Appalachian region. Although significant melting of the snow has occurred here in AL with above freezing temperatures today, Terra MODIS images show the lingering snow (red colors) especially in parts of Morgan, Cullman, Marshall, Blount and Jefferson Counties in Alabama (Figure 1). Around 3 to as much as 4 inches of snow were reported in some of these areas yesterday.
Of course, snow will also show up fairly well in standard visible imagery. However, notice the snow (red color) over portions of the Appalachians coincident with some low/mid level cloud cover (white colors) forced by uplift along the higher terrain (Figure 2). The snow extends from Knoxville, TN northeast into central Virginia. The snow is much easier to differentiate from cloud cover in this type of imagery. Widespread snow with amounts ranging from just around an inch in some of the valley locations up to around one foot were reported in the region.