How were they wrong? We were skating along, enjoying a couple of weeks of clear skies, temps in the mid-30's and little to no wind. They told us that Wednesday and Thursday we were going to get a bunch of snow and wind, and guess what, we got a bunch of snow and wind. They are "wrong" only in the sense that you are holding them to a standard that when they say the high is going to be 79 degrees and it turns out to only get to 75, you're unhappy about it.
The other thing is that if they say that we're going to get 18 inches of snow and 30 mph winds, and we only get 12 inches and 20 mph winds, the consequences for the population are pretty much zero, other than blowing a few bucks on calling out the National Guard, or calling off some useless high school basketball game.
On the other hand, if they tell us two feet of storm surge and we get 10 feet, or they tell us 5 inches of snow and 10 mph winds, and we get 18 inches and 35 mph winds, the consequences can be deadly.