Regional reanalysis for the southeastern United States at a 4-kilometer and daily to sub-hourly resolution, 1975-2024

A regional reanalysis of weather for the southeastern United States at a 4-kilometer spatial resolution and daily to sub-hourly resolution was produced by the U.S. Geological Survey in cooperation with the Florida Flood Hub for Applied Research and Innovation. The reanalysis is intended to recreate historical weather for a 1,200-kilometer by 1,400-kilometer area of the southeastern United States for the period January 1, 1975 through December 31, 2024 with sufficient spatial and temporal detail to resolve mesoscale atmospheric processes. An urban physics scheme was employed to properly account for urban heat island effects and associated biases in surface air-temperature and rainfall over large population centers. The dataset was generated using the Weather Research and Forecasting (WRF) version 4.4.2 model (Skamarock and others, 2021), forced with boundary and initial conditions from the European Center for Medium-Range Weather Forecasts (ECMWF) Reanalysis version 5 (ERA5) data (Hersbach and others, 2020). Output consists of more than 200 model state variables (those variables simulated explicitly by the model, such as water vapor mixing ratio). Three sets of output files were produced at different temporal resolutions: (1) hourly files with all model outputs (files in the “hourly” directory); (2) daily files containing data at 15-minute increments for surface pressure, precipitation, 2-meter air temperature, 2-meter water vapor mixing ratio, and u- and v- components of windspeed at all levels (files in the “15min” directory); and (3) daily files with minimum, maximum, mean, and standard deviation values for selected of surface variables (files in the “xtrm” directory). The simulation time of the model is referenced to Coordinated Universal Time (UTC) rather than local time. The Entity and Attribute element of this metadata record documents the data dictionaries for all the variables in each of the three sets of output files.

The output files are approximately 120 terabytes (TB) in volume and are archived on the U.S. Geological Survey's Black Pearl tape drive system. Data files are provided via a Globus Access Portal (linked under Related External Resources and below herein). Globus* is a fast, secure, and reliable way to move large data files and will automatically resume transfers when there are network disruptions. Learn more at https://www.globus.org/data-transfer.

https://app.globus.org/file-manager?origin_id=7b183415-9453-4f5d-ab8b-2….

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