Confused Weather

Since I am the one that drives my father back and forth to Brooklyn on the weekends, I have become a weather watcher. They predict some snow for this weekend, but every time I look at the weather channel the forecast changes. Either it can't make up its mind or it really does not have the correct answer. One minute it is rain. The next snow. Then there is a mix. The temperature changes from 40 degrees to 47 degrees and then goes to 45 degrees. Why post the information if it changes? The only time I will know the weekend weather will be on Monday morning when the weekend is over.