GFS Storm Precipitation, 2019 and 2020 Storms

Operational forecast models are necessary for the prediction of weather events in real time. Verification of these models must be performed to assess model skill and areas in need of improvement, particularly with different types of weather events that may occur. Despite the devastating impacts that can be caused by tropical cyclones (TCs) that undergo extratropical transition (ET) and become post-tropical cyclones (PTCs), these storms have not been extensively studied in the context of short-term weather prediction. This study completes the first analysis of the Global Forecast System (GFS) and a pre-operational version of the newly operational Hurricane Analysis and Forecast System (HAFS) models in forecasting the occurrence of ET and the rainfall associated with ET storms in the North Atlantic basin. GFS's skill exceeds that of HAFS in forecasting the occurrence of ET, but HAFS tends to have lower track and rain rate errors in the fully tropical phase of ET storms' life cycles. Both ..., The data that support the findings of this study are available at the following URLs:
IMERG Final Run: https://gpm1.gesdisc.eosdis.nasa.gov/data/GPM_L3/GPM_3IMERGHH.06/
IBTrACS v4: https://www.ncdc.noaa.gov/ibtracs/index.php?name=ib-v4-access
ERA5 reanalysis: https://cds.climate.copernicus.eu/#!/search?text=ERA5&type=dataset
GFS data was accessed from the UCAR Research Data Archive: https://doi.org/10.5065/D65Q4TSG
TempestExtremes is publicly available on GitHub at:https://github.com/ClimateGlobalChange/tempestextremes
ExTraTrack software is available at https://github.com/zarzycki/ExTraTrack
 , , # GFS Storm Precipitation

[https://doi.org/10.5061/dryad.8sf7m0czg](https://doi.org/10.5061/dryad.8sf7m0czg)

## Description of the data and file structure

This dataset contains the storm-related rainfall files from the GFS model runs used in the associated manuscript. These files are generated by tracking the TC of interest in each operational simulation, including the extension of the TC trajectory into the post-tropical phase. Rainfall is then tracked using a 1 mm/hr threshold for identifying precipitation objects. The area over which to extract the storm-related rainfall is created by identifying the locations around the storm center where the geopotential height at 500 hPa (Z500) increases by 10 m from the value at the center of the storm (Z500 mask). Finally, the rainfall objects and the Z500 mask are overlaid, thus co-locating rainfall with its respective storm. The TC tracking, precipitation tracking, Z500 mask generation, and co-location are all accomplished using TempestExtr...