Because weather is a really complex event, with lots of small thing influencing each other at cross-purposes. We don't know it well enough to be able to tell exactly what will happen.
The movements of fronts are so important for predicting weather. This is because fronts are one factor of weather patterns.
Meteorology
Meteorology
A Weather Forecastwhat is predicting the weather called
forcasting is predicting the weather. Weathering is tempering the weather
true
mw.weather.com/
forecasting
They specialize in predicting the weather.
The forecaster predicted the weather for the whole week
no!
Getting it right.