1. a National Drought Mitigation Center, University of Nebraska–Lincoln, Lincoln, Nebraska
2. b Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin–Madison, Madison, Wisconsin
3. c NOAA/National Integrated Drought Information System, Urbana, Illinois
4. d Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, Colorado
5. e USDA Midwest Climate Hub, National Laboratory for Agriculture and the Environment, USDA Agricultural Research Service, Ames, Iowa
6. f NOAA/National Marine Fisheries Service, Alaska Region Habitat Conservation Division, Anchorage, Alaska