Practically Perfect Hindcast Archive 1979-2022

(updated 24 April 2024 to include 2022 data)

It is recommended that you read https://journals.ametsoc.org/doi/abs/10.1175/BAMS-D-19-0321.1 before using this data.

  • Practically perfect values (0-100%) were calculated on the NCEP 211 grid (80-km) following the formal definition used at SPC. This involves using a 1.5 σ kernel as described in the paper above.

  • Archived fields are available for tornado, damaging convective wind gusts, and large hail. Significant (i.e., hatched) fields are also available.

A plotting example using a Python Jupyter Notebook is available here.

 

Download Tornado Download Hail Download Wind
     
Download Significant Tornado Download Significant Hail Download Significant Wind

Files are approximately 742 MB each

If using this data, please cite:

Gensini V. A. , A. M. Haberlie, and P. T. Marsh, 2020: Practically perfect hindcasts of severe convective storms. Bull. Amer. Meteor. Soc., DOI: 10.1175/BAMS-D-19-0321.1

If you are interested in obtaining data prior to 1979, or a "modified" version of the practically perfect hindcasts, please contact me.
Send any questions to vgensini at niu dot edu

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