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6-h Categorical Scores (threat score, bias)


  Issue Time:   Precipitation Category: print image
     
 
         

 
Legend
NAM -- NAM QPF
GFS -- GFS QPF
GMOS -- Gridded MOS QPF
HR-PW -- Hi-Res Gridded MOS Prob Wt'd QPF
HR-CONT -- Hi-Res Gridded MOS Continuous QPF
HPC -- HPC QPF
NDFD -- NDFD QPF
     
QPF Verification Graphic

Important notes:

  • All QPF products were interpolated to the RFC 4km (HRAP) grid (except that HR-PW and HR-CONT QPFs are not interpolated since the HRAP grid is native for these products). QC'd RFC 4km QPE data (~462,000 gridpoints over CONUS) were used for validation. A rigorous machine-human interactive process was used to perform QC at MDL wherein about 6% of QPE data was discarded during warm season and 12% during cool season. Subjective and objective comparisons of the QC'd QPE data and QC'd gage precipitation data shows very good consistency between the two precipitation data types.

  • RFC QPFs are not included in the scoring because of their limited issuance times and forecast projections.

  • Perfect bias = 1.0





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    Page Last Modified:  Page Last Modified: March 23 2010 12:53:35 UTC