This is some great stuff from the CIMSS bunch at the University of Wisconsin. Read the following message sent March 21, 2008 and click the accompanying link to go to their satellite blog.
“MODIS images showing the extent of river flooding in the central US have been posted on our CIMSS Satellite Blog:
Unfortunately, since AWIPS is restricted to 8-bit displays, it cannot create the type of beautiful 24-bit “true color” or “false color” images that are shown in the blog entry; however, a simple comparison of the MODIS Band
1 (visible) and Band 7 (“snow/ice”) channels can get you part of the way there in helping to determine which rivers in your CWA are experiencing significant flooding.”