You are correct with rain changing to snow history. But this situation is different and isn't a cold chasing Rain. As QC stated yesterday, you have/hoping a wave develops on an artic front. Hopefully we can get the trough to get neutral and deep enough to allow this to occur for our backyard. So its very rare on this side of apps to see cold catch moisture in time, but this scenerio is a little different, plus this isn't a run of the mill front that's gonna be sweeping through.