Meteorology

I am sick of meteorologists and their incorrect weather predictions. I will check the weather at a certain time in the day, when I go back to check it later, the whole forecast has changed! It's like these guys are just looking out the window and making changes to the graph as needed. Hell I could do that. They can't even give me an accurate prediction of rain. Sometimes it will appear as a question mark, what the crap is that. I can say it may or may not rain and be right. I know that with all the effects on the Earth the weather patterns change, blah, blah, blah, and it may not be so easy to predict but come on, is it necessary to make changes to the forecast every hour? Has anyone else had a problem with incorrect information or constantly changing info?