the fact of the matter is, i can tell kwluyou what the weather is but to forecast the weather going into future you need to be able to measure the different levels of the atmosphere and then calculate what that's telling you. the fact of the matter is if you get one little thing wrong you can throw everything off. here in this situation you saw that with the european and you saw that with an it was real disaster. >> chad the director of the national weather service singled you out specifically for praise today. i wanted to play what he said. >> i'm like to commend cnn chad meyers for his efforts to move the national conversation away from a clear cut scenario to explain what a shift in the western boundary of the predicted snowfall could mean for this storm. >> that's the first time i heard that. >> last night when you and i were standing outside you were doing this explainer where you were doing this thing with your arm and saying it's out here now and has to curve back. right now at that time we're speaking we were in this lull period and it was going to maybe curve back. you're explai