Question

Generally however elders predict the weather sometimes times it comes true but sometime does not why?​

Answer 1

based upon the observing sky and observing the smell of soil they predict

sometimes these may not be correct due to the heavy winds carry out the clouds and some times bad prediction of our elders

Answer 2

Meteorologists use computer programs called weather models to make forecasts. Since we can't collect data from the future, models have to use estimates and assumptions to predict future weather. The atmosphere is changing all the time, so those estimates are less reliable the further you get into the future.