Get ready for some more snow, Chicago.

A winter storm warning is in effect for the entire Chicago area. The National Weather Service upgraded the regions south and the southwest suburbs to a warning at 10:30 a.m. Monday.  This warning runs from 3 a.m. Tuesday until midnight.

Chicago Weather Center forecasters say that the steady, moderate-to-heavy snow won’t arrive in the Chicago area until Tuesday morning. Meteorologist Mike Hamernik says that while snowfall accumulation of 0 to 2 inches is likely by 6 a.m. Tuesday, the heaviest snowfall will be during the day Tuesday.

A total snowfall accumulation of 5 to 10 inches is likely by Wednesday morning, Hamernik said.

While a brief period of flurries or light snow are possible Monday afternoon, little or no accumulation is expected.

Meanwhile, a winter storm watch continues from late Monday night through Tuesday for portions of northern Indiana and southwest Michigan.  Counties under the Winter Storm Watch include La Porte, St. Joseph and Berrien.

The National Storm Prediction Center has issued man-computer model mix maps depicting the probability of 4 and 8 inches of snow from 6am Tuesday until 6am Wednesday. Much of northern Illinois and Indiana and all of the Chicago area falls in the red, well over a 70 percent probability of 4 inches and nearly 50 percent area of 8-inches.

For the latest weather updates, go to ChicagoWeatherCenter.com.

Probability of at least 8 inches of snow 6am Tuesday to 6am Wednesday. Map courtesy of ChicagoWeatherCenter.com

The Chicago Tribune and the Chicago Weather Center bloggers contributed to this report.