A plume of deep atmospheric moisture will spread into the Ohio Valley ahead of a surface low and strong upper level disturbance today. Initially, scattered to numerous rain showers will move into the region from southwest to northeast this afternoon. By late evening, rain showers will begin to change to a rain/snow mix and then all snow across southern Indiana. Accumulating snow appears likely by Midnight and after, with around 2 to 4 inches of accumulation expected. Further south across north central Kentucky, the change over to rain/snow and then snow will occur around Midnight, with accumulations expected in the pre-dawn hours. North central Kentucky over to the Bluegrass should expect 1 to 3 inches of accumulation before the majority of precipitation ends around daybreak.
Expect a relative lull in wintry precipitation through the late morning and early afternoon on Saturday, but by mid to late afternoon, scattered snow showers will again develop across much of the area. Some of the snow showers could produce a quick burst of snow, causing light accumulations and slick conditions through the evening hours on Saturday.
A Winter Weather Advisory will go into effect from 7 PM EST tonight through 7 PM EST on Saturday to account for these two rounds of snow across southern Indiana and north central Kentucky. Below is a map showing the advisory area and expected impacts.