Heck, they can't even predict the weather three hours ahead sometimes. So many times in the past few years, I've checked the weather when we were having a blizzard and already had a foot of snow on the ground...only to have the forecasters insist on telling me we were having snow showers or flurries, with 1-3 inches of accumulation. Or have them say it's sunny, when the wind is blowing like a hurricane and the rain is pounding down with the force to down trees...and we're huddling on the porch watching the 'nipple clouds', and wondering which one of those funnels will make it to the ground.
Parts of NY get buried from the Great Lakes snow effect, sometimes feet at a time, and it's almost impossible for weather forcasters to predict the amount that will fall. They usually just say 6 inches or more. What's great is going to the Weather Channel's website where they have a radar screen of the whole state and I know instantly if any rain or snow is on the way.