Some nasty weather could be coming into Muskoka and Parry Sound.  Environemnt Canada is watching two weather systems, one from Alberta and the other from Texas, that are expected to meet over the Great Lakes this week.  Meteorologists say the systems could merge late Thursday when they’ll drop rain in southern Ontario and as they system moves north it will hit colder weather and start as snow before changing back to rain.  Freezing rain and ice pellets are also possible while the system moves across the province through Friday.  The weather agency will continue to monitor the two systems.