No doubt, the highlight of the week will be the formation of a major storm over the central U.S. on Thursday. This storm will be remembered for the widespread severe weather outbreak that we anticipate over the central and lower Mississippi and Lower Ohio Valley region later Thursday and Thursday night. This storm could produce a lot of tornadoes. Steady rain ahead of this storm should spread into southwestern ontario Thursday night. As the storm moves up toward the Great Lakes Friday it will begin to stall out as a big blocking
high over eastern Canada gets in the way. If this track holds, then we may see another moderate sized snow event in the region around Lake Superior once again Friday and into Friday night. Rain will eventually spread into the remainder of eastern Ontario and southern Quebec sometime Friday,
but as the blocking high to the north strengthens, it will force a pocket of colder air farther to the south, causing a cold air damming situation across far northern New England and southern Quebec by Friday night and that could mean we see the rain changing over to snow or sleet from near Ottawa to Montreal to Quebec City. Stay tuned for more on this tomorrow and Wednesday. 4. That same blocking high will also force the Great Lakes storm to transfer it's energy to a secondary storm near southern New England early Saturday. The eventual track and intensity of this second storm will be key in determining how much snow, if any, falls over southern Quebec, far northern New England