1. Office of Hydrologic Development, National Weather Service, National Oceanic and Atmospheric Administration, 1335 East West Highway, Silver Spring, MD 20910 (corresponding author).
2. Office of Hydrologic Development, National Weather Service, National Oceanic and Atmospheric Administration, 1335 East West Highway, Silver Spring, MD 20910.
3. Office of Systems Development, National Environmental Satellite, Data, and Information Service, National Oceanic and Atmospheric Administration, 1335 East West Highway, Silver Spring, MD 20910.
4. ADNET Systems Inc., 164 Rollins Ave., Suite 303, Rockville, MD 20852; formerly, TCoombs & Associates LLC, 6551 Loisdale Ct., Suite 500, Springfield, VA 22150.