By mid-afternoon the primary snow shower activity has remained nearly stationary off-shore over the lake with clouds and flurries spreading inland with little or no snow accumulation. The Winter Weather Advisory has been cancelled and indications are that while the snow showers and cloudiness will spread slowly southeast toward NW Indiana, the light nature of the snow – more like flurries will continue close to the lakefront. Conditions will improve later this evening.
Accumulating lake-effect snow showers today may impact areas just along the Lake Michigan shoreline from Chicago and Cook County around the south end of the lake into the northernmost sections of Lake, Porter and LaPorte Counties in Indiana. The low-level wind pattern and temperature distribution seem conducive for the development of snow showers over southern Lake Michigan. Snow showers could set up in north-south bands and become almost stationary for extended periods. Under such conditions there could be snow accumulations of 1 to 3-inches in areas along and just inland of the lake where these “plumes” set up.
Hazardous driving conditions may well develop in stretches where the snow hits. Indications are the heaviest snowfall could occur along and just inland of the Cook County shoreline where a Winter Weather Advisory is in effect today. Then as winds slowly shift from north to northwest, the bands could shift around the south end of the lake into northwest Indiana this afternoon/evening.
For a more detailed look at projected conditions see the pictorial prepared by the Chicago National Weather Service below.