Clients and Program Managers require meaningful and representative quantities on which to base important operational decisions and to design improvements in the program.
Predictive skill is a strong function of event type and the space and time scale of the prediction.
Reproducible, accurate and unbiased measures of predictive skill are determined at telescoping scales of space and time. Sample results and message based verification products are used to illustrate the main attributes of Spatial Verification using the Severe Thunderstorm Program for Ontario Region. The requirements of clients and program managers at all scales, can be fulfilled using Spatial Verification.