The U.S. Geological Survey (USGS), in cooperation with DuPage County Stormwater Management Department, maintains a watershed data management (WDM) database of hourly meteorological and hydrologic data for use in a near real-time streamflow simulation system. These data are stored daily in the WDM database by USGS staff and are initially provisional and subject to change due to periodic equipment malfunctions and/or weather related issues. This system is used for the management and operation of reservoirs and other flood-control structures in the West Branch DuPage River (WBDR) watershed in DuPage County, Illinois. The WDM database is updated with quality-assured and quality-controlled (QA/QC) meteorological and hydrologic data for each water year (WY) and is named as WBDRXX.wdm where XX represents the last two digits of the WY. A WY is the 12-month period, October 1 through September 30, in which it ends. The WDM database is a binary, direct-access electronic file (Flynn and others, 1995). It was developed by the USGS to be used with hydrologic and water-quality models and analyses. Data within the WDM database are stored in datasets and each dataset is assigned a number called a dataset number (DSN). The WDM database can be accessed with the ANNIE computer program (Flynn and others, 1995), with the Generation and Analysis of Model Simulation Scenarios (GenScn), an interactive computer program (Kittle and others, 1998), or with Better Assessment Science Integrating point and Nonpoint Sources (BASINS), a multipurpose environmental analysis system (U. S. Environmental Protection Agency, 2015). This is version 1.1 of this data release with the corrected meteorological data for the period January 1, 2007, through September 30, 2022. Errors have been found in each of ARGNXX.WDM prior to WY 2023. WBDR13.wdm contains erroneous meteorological data and related flag values thereby. WBDR13.WDM is replaced with WBDR22.WDM. This WDM file contains corrected meteorological data from ARGN23.WDM (Bera, 2024a) for the period from January 1, 2007, through September 30, 2022, along with other data mentioned in the WBDR13.WDM. While WBDR13.WDM is available from the author, all the records in WBDR13.WDM can be found in this version as well. The WDM file WBDR22.WDM contains meteorological and hydrologic data collected in and near DuPage County, Illinois. The precipitation data are collected from a tipping-bucket rain-gage network located in and near DuPage County. The hydrologic data (stage and discharge) are collected at USGS streamflow-gaging stations in and around DuPage County. The WDM database WBDR22.WDM is quality-assured and quality-controlled (QA/QC) to ensure the datasets are complete and accurate and contains data from January 1, 2007, through September 30, 2022. The Open File Report Bera (2017) describes the data organization, sources, and QA/QC in detail. The complete list of datasets in WBDR22.WDM database is given in table 2, and a list of dataset attributes is given in Appendix 1 (Bera (2017). To open WBDR22.WDM file user needs to install Sara Timeseries utility described in the section "Related External Resources". First posted - October 12, 2017 (available from author) References Cited: Bera, M., 2024a, Meteorological Database, Argonne National Laboratory, Illinois: U.S. Geological Survey data release, https://doi.org/10.5066/P146RBHK. ____ 2024b, Watershed Data Management (WDM) Database (WBDR22.WDM) for West Branch DuPage River Streamflow Simulation, DuPage County, Illinois, January 1, 2007, through September 30, 2022: U.S. Geological Survey data release, https://doi.org/10.5066/P1LDIASU. Bera, Maitreyee, 2017, Watershed Data Management (WDM) database for West Branch DuPage River streamflow simulation, DuPage County, Illinois, January 1, 2007, through September 30, 2013: U.S. Geological Survey Open-File Report 2017–1099, 39 p., https://doi.org/10.3133/ofr20171099. Flynn, K.M., Hummel, P.R., Lumb, A.M., and Kittle, J.L., Jr., 1995, User’s manual for ANNIE, version 2, a computer program for interactive hydrologic data management: U.S. Geological Survey Water-Resources Investigations Report 95–4085, 211 p. Kittle, J.L., Jr., Lumb, A.M., Hummel, P.R., Duda, P.B., and Gray, M.H., 1998, A tool for the generation and analysis of model simulation scenarios for watersheds (GenScn): U.S. Geological Survey Water-Resources Investigations Report 98–4134, 152 p.