Only those stations that had at least 10 years of data were selected for this study to ensure that data were representative of long-term precipitation characteristics. The use of data with at least 10 years of record reduces the chance that data are unduly biased by climatic episodes. One station with eight years of 15-minute data was used for the analysis in an area where there was a sparsity of data. For more information see Tortorelli, Rea, and Asquith, 1999. Interpolated-surface values are given only for precipitation stations within Oklahoma.
All depths are in inches.
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.