A winter storm warning is in effect for Ontario, Wayne, Livingston and Allegany counties.

Rain arriving around midday Monday is expected to change to snow in the evening and continue through late Tuesday morning, with the heaviest snow falling overnight into early Tuesday morning, according to the National Weather Service. Accumulations of 4 to 8 inches are expected tonight, with around another inch Tuesday. An inch per hour is expected to fall during the heaviest snowfall this evening and overnight. Visibilities are expected to be as low as a quarter-mile at times.

The heavy wet snow will result in difficult travel conditions tonight and early Tuesday, resulting in a difficult commute Tuesday morning, the NWS warns. The weather service also notes that the heavy wet snow could result in a few tree limbs coming down with associated isolated power outages.

The warning is in effect through 10 a.m. Tuesday.

In addition, a winter weather advisory is in effect through 10 a.m. Tuesday for Monroe, Genesee, Wyoming and Cattaraugus counties for the same basic conditions, though not as severe. Accumulations of 3 to 5 inches are expected tonight and another inch Tuesday, with visibility down to half a mile at times.