Why explanations are tentative and testable in meterology?

Question

in the history of meterology how are explanations tentative and testable

Answer 1

Not many. Because of the high fluidity of the Earth's atmosphere it is impossible to replicate most weather conditions in a lab. However, there are those who are able to forecast weather long-range, months and years in advance using astronomical forecasting.

I forecast long-range weather applying astrometeorology, and discovered the best way to test is to observe in the real world and to use astronomical principles in forecasting. The weather itself always proves if the forecast is correct or incorrect.