HPC 24-h QPF Verification30+ years of deterministic forecasts
Gridded verification system
- until Dec. 1998, Polar Stereographic 30 km Grid with normalization
- since Jan 1999, Lambert Conformal 32 km Grid with normalization for the CONUS land areas
First Guess Analysis Field
- 24-hour gauge-only precipitation observation on IBM SP
- EMC Stage III analysis algorithm on 4 km grid remapped to 32 km grid
- or CPC 0.25 degree analysis remapped to 32 km grid.
HPC Manual Modification of First Guess using 240hr gauge observations
- CPC data - HYD bulletins, STP Summaries, etc.
- METAR & Syn OBS
- CNRFC & NWRFC QC’d obs
- Analyze 0.50, 1.00, 2.00”. Etc contours.