A winter storm that moved into the Chicago area Sunday evening is expected to continue through the afternoon, causing slow and possibly dangerous driving conditions.

Snow began falling overnight, with 2.5 inches recorded at O’Hare International Airport by noon, according to the National Weather Service. There were 3 inches recorded at Midway International Airport.

The weather service said driving conditions remained “difficult to hazardous” as of about 2 p.m.

Difficult to hazardous winter driving conditions continue. In NE IL & part of NW IN, band of light-moderate snow causing reduced visibility & will bring additional accum up to ~1". In rural & open areas of nrn & central IL, reduced visibility in patchy blowing snow. #ilwx #inwx pic.twitter.com/6fsPovvCTD — NWS Chicago (@NWSChicago) January 15, 2018

A Winter Weather Advisory is in effect until 3 p.m. for central, east central, north central and northeast Illinois and parts of northwest Indiana. The advisory warns of slippery road conditions and reduced visibilities caused by drifting snow and patchy blowing snow, especially in rural areas of northern and central Illinois.

The weather service said additional snow accumulations of up to an inch are possible through the afternoon in northeast Illinois, with less than one inch expected elsewhere.

Winds could reach 20 mph by Monday afternoon, causing snow drifting, according to the weather service. A high of 25 degrees was forecast for Monday, with a low of 9 degrees at night and a 70 percent chance of snow showers.

An excessive cold risk was expected for Monday that could last until Thursday, according to the weather service.