1. I .M. Systems Group, Inc., Rockville, Maryland, and NOAA/NWS/Weather Prediction Center, College Park, Maryland
2. Systems Research Group, Inc., Colorado Springs, Colorado, and NOAA/NWS/Weather Prediction Center, College Park, Maryland
3. NOAA/NWS/National Water Center, Silver Spring, Maryland
4. NOAA/OAR/National Severe Storms Laboratory, Norman, Oklahoma
5. NOAA/NWS/Weather Prediction Center, College Park, Maryland
6. Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, and NOAA/ESRL/Physical Sciences Division, Boulder, Colorado