The National Weather Service has placed all of the viewing area under a Winter Weather Advisory which will go into effect from 7 PM this evening through 10 AM for areas west of the bay. The Winter Weather Advisory will go into effect until midday Thursday for the Eastern Shore. Exercise caution when hitting the roads tonight-Thursday midday as there could be some mixed precipitation to the south of the city as temperatures hover around freezing during the evening commute. This may create a light glaze of ice on the roads which could lead to hazardous travel conditions.
The first round of snow is expected to move in from west to east this evening and may possibly mix with some freezing rain/rain to the south of the city. This will help the snow stack up in areas north and west of the city as those locations will be on the colder side of the storm. Snow looks to turn more widespread overnight and will linger into Thursday BUT snow should lighten up by midday. The second round of snow arrives Thursday night-Friday morning and looks to bring the heaviest snowfall to areas south of the metro.
Snowfall totals from tonight-Friday morning look to be greatest across higher terrain, across our northwest suburbs. On average, 2-4" can't be ruled out around the metro, to the south of the city, and along the Eastern Shore when it's all said and done. Model guidance indicates that snow showers will come to an end by Friday afternoon.
We are not done with the wintry weather quite yet though... our next chance for wintry precipitation will be this weekend!