The initial analysis was carried out as an activity of the Consortium for Atmospheric Resources Development, with funding from the North Dakota Weather Modification Board under Contract WMB-CARD-86-1. We thank R. Lynn Rose for providing the opportunity to conduct this investigation. Further work was funded by the National Oceanic and Atmospheric Administration (NOAA) Federal–State Cooperative Program Agreements NA27RA0178-01 and NA47RA0184 between NOAA and the North Dakota Atmospheric Resource Board, State Water Commission through NDARB Contracts ARB-IAS-93-1, ARB-IAS-94-1, and ARB-IAS-95-1. The views expressed herein are those of the authors and do not necessarily reflect the views of NOAA or any of its subagencies.
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