Weather is predicted at the scene of were it happens, or at a weather station.
Can't prevent them but they are predicted by weather observations. This is called meteorology. Tornados can be predicted but what can't be predicted is how they move or where they will go next.
weather radar
Weather cannot be controlled, only predicted (imperfectly).
storm watching and weather radar
rain
The forecaster predicted the weather for the whole week
maybe it depands on the weather
The weather for the 2012 German Grand Prix is predicted to be rainy with a chance of clouds.
Go to WeatherChannel.com to see a forecast.
Supercells and other types of weather cannot be predicted to that degree.
As of 26 Sept 2009 the weather cannot be predicted that far ahead.
Weather can never be predicted with 100% accuracy.