Oh the weather

So i wanted to go out and take some pictures today, yesterday the weather network said it was going to be warm and very small chance of rain but now it's saying a thunder storm is coming and the temperature is way cooler. How can they not predict the weather a little more accurately a day advance? I mean i could understand a week, weather is unpredictable....but one day. I looked outside and it's sunny and warmish so i may still take serenity out anyways and snap a few. Hopefully the good morning weather holds up.