In 1–2 sentences, explain why weather can be predicted only as probable, not definite

Weather is a complex system that is affected by many variables, making it impossible to predict with absolute certainty. Therefore, weather can only be predicted as probable, not definite.

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Weather can only be predicted as probable because it is influenced by complex and dynamic systems, such as atmospheric conditions, which are subject to inherent uncertainties and limitations in observation and modeling.

Weather can only be predicted as probable because it is a complex system influenced by various factors, such as temperature, pressure, humidity, and wind patterns, with inherent uncertainties in measuring and modeling these variables.