This data set archives all inputs, outputs and scripts needed to reproduce the findings of W.H. Farmer and R.M. Vogel in the 2016 Water Resources Research article entitled "On the Deterministic and Stochastic Use of Hydrologic Model". Input data includes observed streamflow values, in cubic feet per second, for 1225 streamgages over the period from 01 October 1980 through 30 September 2011. Estiamted streamflows, for the same streamgages and periods, is provided from a general calibration of the Precipitation Runoff Modeling System. Output data includes the same with alternate realizations of streamflow generated following the descriptions in the associated report. These results can be regenerated by using the included scripts. Data are provided in several files: (1) observedStreamflow.csv contains observed streamflows, in cubic feet per second, for all 1225 streamgages; (2) prmsModeledStreamflow.csv contains streamflows modeled with the Precipitation Runoff Modeling Streamflow (Markstrom et al., 2015; DOI 10.3133/tm6B7); (3) outputData.zip contains CSV files of observed, PRMS-modeled and stochastically-generated streamflows, in cubic feet per second, for all 1225 streamgages; (4) README.txt describes the contents of this archive and execution of model scripts; (5) simulation.R is a computer script in in the R programming lanaguage and is capable of reproducing the results in outputData.zip from observedStreamflow.csv and prmsModeledStreamflow.csv; (6) analysis.R is another R script capable of reproducing the figures in the associated report from the results in outputData.zip.