(this 2-image Java fading tool will take a minute or two to load...)
Hold the left mouse button down as you drag the slider above the image (or use the arrow buttons) to fade between the GOES-8 visible image and the corresponding GOES-8 10.7/12.0 micron IR temperature difference image. Large plumes of blowing dust/sand appear hazy on the visible image, and are colored with a yellow-to-blue enhancement on the IR difference product.
Surface reports are plotted on the visible image; surface visibility (black, in miles) and restriction to visibility (red, BD=blowing dust, H=haze) are plotted on the IR temperature difference image.