Hold the left mouse button down as you drag the slider above the image (or use the arrow buttons) to fade between the Terra MODIS visible (channel 01) image and the corresponding 1.6 micrometer Near IR (channel 06) image at 17:52 UTC on 01 February 2002. To zoom, click on the "Zoom" button, and then click the "hand" cursor on the image where you want to center the zoom.
Extensive snow cover can be seen across much of the southern Great Plains region on the visible channel data. The 1.6 micrometer channel reveals that much of the southeastern edge of the snow band is actually ice-covered ground (black enhancement) from a major freezing rain event that deposited ice up to 1-3 inches thick across parts of northcentral Oklahoma and southcentral/southeastern Kansas. The northwestern edge of the ice-covered region later received some snow, making it similar in appearance (on the visible channel) to the snow-cover-only region farther to the north and west -- however, using the 1.6 micrometer channel data one is able to determine to complete areal extent of the ice-covered ground (and detect the presence of thick ice cover under snow cover).
Java applet developed by Tom Whittaker, CIMSS / SSEC
Back to the 01 February 2002 Central US Snow and Ice Storm page