ECMWF May be Indicating Snowy Period for Lower Great Lakes October 19
The 12z ECMWF model is printing an interesting solution. At 7 am October 19th, the ECMWF shows considerably high relative humidity values fairly close to the surface while the 540 line (line that theoretically separates rain and snow) has collapsed southward, allowing for a rush of frigid air to invade the Great Lakes. These relative humidity readings got me thinking: Does this mean the ECMWF is pointing towards snow? And since this is the best ECMWF in terms of maps we have available, I do believe that there is potential for snow in the areas in green, especially in darker green shades in the lower 2 images, which are relative humidity images.