Equitable threat and bias scores are available for the current month's forecasts, and for every month since January 1995.
Graphics of precipitation forecasts and analyses can be found here.
24h Forecast vs. Observed Precipitation Plots
Perry Shafran's EMC Interactive web tool to plot scores (RTVS at NCEP) (Currently only accessible from within the NCEP firewall)
Fanglin Yang's verification page; document on the Monte Carlo significance test
NCEP/HPC Verification Site
Notes/Errata About the 1 Sep 2008 changes User guide for the precipitation verification package Q&A About the Precipitation Scores Historical QPF VSDB files: streamlining/consolidation Mike Baldwin's 2001 documentation on the old verification package
NCEP/EMC Mesoscale Modeling Branch