A low-pressure system will continue to move quickly northeastward through eastern Canada today with a cold front extending southwestward all the way to southern TX. Some snow accumulation is possible early today in southern WI and northern lower MI, and further south and east rain showers and a few storms are possible especially near the cold front. A few storms will have a chance to be severe with isolated wind and tornadoes possible from the Ohio River Valley to southern New England in the north and isolated wind and hail potential in the south from central LA to central AL. Showers and a few storms will remain possible from the Mid Atlantic to the Gulf Coast on Saturday.
Further west an upper low located in the southwest will gradually become an open wave over the next day or so initially producing scattered rain and snow in the parts of the central Rockies, CA, NV, and UT. Precipitation associated with this system is expected to increase in coverage in the southern Plains Saturday and Saturday night and the continue to move through the eastern third of the country on Sunday with mainly rain and a few storms, though some accumulating snow potential will exist on the northern end of this area of precipitation in southern IA and northern MO Sunday afternoon/evening, northern IL and northern IN Sunday evening, and southern and eastern lower MI overnight Sunday.