Low pressure over the mid Mississippi Valley will track northeastward across the lower Ohio Valley this afternoon and tonight, and into the eastern Great Lakes on Wednesday.
Rain will spread northward across the area this afternoon. The rain could begin as a period of freezing rain, sleet, and snow, especially from Warren county eastward, where some light ice and snow accumulations are possible today. Most areas will see all rain this afternoon as milder air surges northward across the region.
As the storm reaches Lake Erie tonight, it will begin to entrain some colder air. This will cause the rain to gradually mix with and change to snow overnight. The change over will first take place across the higher terrain then gradually lower during the night. Some light accumulations are possible, especially across the higher terrain.
Snow will continue through the day on Wednesday as the storm slowly moves eastward across southern Ontario and into New York state. Some accumulation is expected with the heaviest amounts across the higher terrain.
The storm will mover very slowly away from the area Wednesday night through the remainder of the week. Moisture will continue to wrap around the back side of the storm bringing periods of snow to the area from Wednesday night, through at least Friday. Additional accumulations are likely. By the time the snow finally begins to wind down this weekend, some areas will have picked up over 6 inches of snow.
It looks like improving weather conditions can be expected over the weekend as dry, but cold, air overspreads the area.
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