Low pressure over Missouri this morning will move northeastward across the lower Ohio Valley into western Ohio tonight. The storm will continue northeastward to Lake Erie on Wednesday where it will gradually slow down.
Rain will spread northward across the region today as deep moisture is pumped northward across the area from the Gulf of Mexico. In addition to the moisture, milder air will also surge northward across the region. While a few areas could see some sleet or freezing rain at the onset of the precipitation later this morning, all rain is expected this afternoon as temperatures rise into the upper 30s. The rain could be locally heavy.
Tonight, the system will gradually entrain some colder and drier air. Temperatures at the surface will fall to just above freezing in most areas and this will support a mix of rain and snow by late tonight. A few areas could change over to all snow.
A mix of rain and snow will continue through Wednesday as the storm moves very slowly to the northeast. Highs on Wednesday will reach the upper 30s.
Colder air Wednesday night will change all of the precipitation over to snow, with periods of snow continuing through Thursday and possibly even into Friday as moisture continues to wrap around the back side of the departing storm. Some accumulations will be possible. Highs will be in the low 30s Thursday and in the upper 20s on Friday.
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