Derived mesoscale convective system snapshots and analysis data for Fu and Prein (2026, GRL)

This dataset contains six compressed tar.gz archives of detected mesoscale convective system (MCS) snapshots over the contiguous United States (CONUS) derived from multiple observational, reanalysis, regional climate model, and global climate model datasets. The included datasets are: GPM-IMERGv07 ERA5 reanalysis NOAA AORC WRF-based CONUS404 historical simulation WRF-based CONUS404 pseudo-global warming (PGW) simulation High-resolution CESM simulation (CESM-HR; Chang, Fu et al. 2025, https://doi.org/10.1038/s41561-025-01859-1) For consistency and fair comparison across datasets, all MCS snapshot variables were interpolated onto a common 0.25deg x 0.25deg latitude–longitude grid. After decompression, each archive contains multiple MATLAB .mat files organized by year, with one file corresponding to one calendar year. These files contain the processed MCS detection outputs and associated snapshot information used in the analyses presented in the manuscript. Each .mat file contains five variables: MCSbt: Cloud-top brightness temperature snapshots surrounding the detected MCS center (unit: K) MCSpr: Hourly precipitation snapshots surrounding the detected MCS center (unit: mm/hour) MCSlon: Longitude of the detected MCS center MCSlat: Latitude of the detected MCS center MCSid: Unique identifier for each detected MCS event; identical values indicate the same MCS tracked at different times The datasets are intended to support reproducibility of the published results, including analyses of MCS frequency, precipitation characteristics, spatial extent, and composite structures.