For our area "they" get pretty close most times. It has to be difficult for them figuring out how much moisture is going to get squeezed out by the Cascades to the west and what will remain for us. If they predict less than an inch of snow, it's usually pretty dang close.
My wife has an "app" on her phone that gives us predictions like Rocky's, somedays they nail it, others not so much.
The funniest are the ones my relatives get from "The Weather Channel" on their phones predicting "Heavy Snow" in our area when we have a chance of 1/2" coming. I'm not sure if they have the same definition of heavy as we do here. For me, the Weather Channel is a joke.
Geno