- prognosis: a prediction about how something (as the weather) will develop
- estimation of time series, cross-sectional or longitudinal data.
- An estimation of a future condition
- the application of science and technology to predict the state of the atmosphere for a future time and a given location
The forecast value of a variable = The initial value of the variable + Expected Change of the value of the variable in the time increment considered
Forecast = Diagnosis + Prognosis