A flood watch is in effect until 1 a.m. Sunday in southern and southeastern Ohio, according to the National Weather Service.
Rain is expected throughout Saturday and into the night, according to the National Weather Service, and the rain could be heavy at times.
More:10 things to do to get your home ready for the Ohio fall and winter
Meanwhile, northwestern Ohio can expect rain Saturday and then a mix of sleet and freezing rain is possible late Saturday night into early Sunday morning before precipitation transitions to light snow. This could result in minor icing.
Northeastern Ohio is expecting rain, then up to an inch of snow by late Sunday morning.
While the weather service forecasts rain of up to an inch in central Ohio, it says that southern Ohio could see up to 2 inches of rain Saturday.
“Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations,” the weather service said in a hazardous weather notice. “Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. … Those living in areas prone to flooding should be prepared to take action should flooding develop.”
The weather service says that in the Athens area, for example, showers are expected and a thunderstorm is possible. Some of the storms could produce heavy rain. The high Saturday will be near 60. The winds will be calm. The chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Saturday night, showers continue and a thunderstorm is possible before midnight, then showers are likely between midnight and 2 a.m., then a chance of showers and thunderstorms after 2 a.m. Some of the storms could produce heavy rain. The low Saturday night will be around 39. Winds will be light and variable. The chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
On Sunday, there is a 50% chance of showers, mainly before 4 p.m. It will be mostly cloudy, with temperatures falling to around 38 by 5 p.m. New precipitation amounts of less than a tenth of an inch possible. The low Sunday night will be around 23.
Monday will be sunny, with a high near 34.
In Greater Columbus, expect rain on New Year’s Day with a high near 58. The chance of precipitation is 100%. New precipitation amounts could be between a half and three-quarters of an inch.
Saturday night, rain is likely, mainly before 9 p.m. The chance of precipitation is 70%. New precipitation amounts could be between a quarter and a half inch.
On Sunday, rain is likely before 10 a.m., then a chance of snow between 10 a.m. and 4 p.m. It will be cloudy with a high near 37. The chance of precipitation is 70%. New snow accumulation of less than a half inch is possible.
Sunday night will be mostly cloudy, with a low around 21. And Monday will be sunny, with a high near 32.

source