¥Local geography in models is smoothed
out.
¥Model forecasts contain
small, regional biases.
¥Model surface temperatures must be
adjusted, and local
rainfall probabilities must be forecast based on experience
and statistical models.
¥Small-scale features,
such as thunderstorms, must be inferred from long-time experience.
¥If model forecast appears systematically
off, human corrects
it using current information.