Weather evolves like nudged chaos, i.e. the predictability is limited, and human judgement remains an important input in the forecasting process.
Sturman, A. and N. Tapper 1996
Becoming a Forecaster
Poetry
Whether the weather be mild or whether the weather be not,
Whether the weather be cold or whether the weather be hot,
We'll weather the weather whatever the weather,
Whether we like it or not.