Less predictable weather
From what I have seen, the jet stream has shifted to the east almost 1000 miles. Instead of dipping low by New Mexico and Arizona, it has been making a dip down by the Gulf of Mexico and drawing up all that tropical moisture.
The weathermen's computer models are not working because the jet stream is not in a normal pattern.
They are trying to do their best, but the patterns are all different so as their predictions get closer, they have to adjust.
If this pattern stays like this, we may have lot's of snow again this winter, but the weathermen are going to have a difficult time predicting until their computer models have more consistent data to draw from.