With a large, slow-moving storm expected to move across the Great Lakes later this week, rain is expected to flood the region Wednesday and Thursday before possibly turning to snow in some areas Thursday evening through Friday, according to the Weather Service. Higher terrain south of Rochester — including the Bristol Hills area and the Southern Tier — could see the first layer of measurable snow, Weather Service Meteorologist Bob Hamilton said.

“It’s been a long time,” he said.

Rochester is not currently expected to see any snow accumulation, he said, but some flakes could be in the air Thursday through Friday. The storm, he warned, is still several days away, so the forecast could change, as it already has.

How much snow does New York get?

Late last week, the National Weather Service’s Climate Prediction Center forecast a powerful storm that would barrel toward the northeast and bring cold temperatures and possibly some lake-effect snow to New York state later this week.