Description of the Dataset This Dataset is uploaded together with paper submitted to Nature journal "Moisture from US Corn Belt fuels more intense convective storms" MCS_track_object.zip file contains the compressed .pkl files that contain the tracking object information for three-year growing season, for StageIV radar observations, the Baseline simulation, and GW-Crop-Irr simulation. For each tracked object, a unique ID would be produced, along with information regarding its lifetime, area, rainfall rate, speed, etc. NetCDF4 files contain the hourly mask files with hourly precipitation output attached. Hence, for each tracked storm with its unique ID, a spatial mask would be produced along with its hourly precipitation output. Thus, matching these two information can map the precipitation area and amount for each tracked storm through its lifetime. Dimension: 2952 hour (MJJA four months) x 659 (lat) x 659 (lon), size: 10G each. NetCDF4 files contain the hourly tracer precipitation from WVT. This data has the same dimension as the precipitation in above object mask and precipitation files. Dimension: 2952 hour (MJJA four months) x 659 (lat) x 659 (lon), size: 4G each. Due to storage constrain in Zenodo, we upload the 2010 MCS object tracking data as an example. Please contact zhezhang@ucar.edu for further inquiry.