Full Notification

* WHAT...For the Winter Weather Advisory, periods of snow expected through the day. A quick 1 to 3 inches of accumulation is expected within a few hour period this morning. For the Winter Storm Watch, heavy lake effect snow possible, first over a short period this evening, then again late tonight through Saturday morning. Snow accumulations of 6 or more inches are possible, mainly east of the Dan Ryan and I-57.

* WHERE...Central Cook and Southern Cook Counties.

* WHEN...For the Winter Weather Advisory, from 9 AM this morning to 6 PM CST this evening. For the Winter Storm Watch, from this evening through Saturday morning.

* IMPACTS...Travel will likely become hazardous as roads become snow covered during the mid to late morning and again this evening, possibly affecting the evening commute.

* ADDITIONAL DETAILS...A burst of accumulating snow is expected mid to late morning and may briefly fall at a rate of up to an inch per hour, making for hazardous travel conditions. A second round of lake effect snow will bring a brief period of snowfall rates up to 2 inches per hour early to mid-evening. Finally, a lake effect snow band may shift westward along the state line and bring a period of heavy lake effect snow for several hours Saturday morning.

* AFFECTED AREAS: CENTRAL COOK ... SOUTHERN COOK

Instructions:

Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. During lake effect snow, the weather can vary from bands of locally heavy snow to dry weather just a few miles away. Visibilities can also vary greatly. Be prepared for rapid changes in weather, visibility, and road conditions. Monitor the latest forecasts for updates on this situation.