A winter weather advisory now in effect across the Chicago area has resulted in low visibility, slick and slippery roads and widespread snow, with “peak snowfall rates” occurring during the Wednesday morning drive, according to the National Weather Service.
Although the advisory extends until 6 p.m. Wednesday evening, the strongest and most stable impact of the snow is expected to occur until lunchtime, according to the NBC 5 Storm team.
But Wednesday isn’t the only day expected to bring snow showers and accumulation to the region.
According to the NBC 5 Storm team, the flakes are expected to subside by Wednesday afternoon, but some showers are expected to persist through Thursday. And, two additional storm systems crossing the region on Friday and Saturday could bring more accumulation.
Here is the latest weather timeline for snowfall in the Chicago area and the expected amount of accumulation.
Wednesday and Thursday
“Maximum snowfall rates” are expected during the Wednesday morning drive, with the heaviest accumulation expected to last until 10 a.m., according to the National Weather Service.
While snow showers in Lake, DuPage and Cook counties are expected to diminish by Wednesday between 12 p.m. and 1 p.m., light, scattered lake-effect showers are expected to continue through the evening and Thursday, particularly in Lake, Porter and LaPorte counties in Indiana. .
Forecast models predict that by Thursday evening, intermittent additional snow showers could push accumulation numbers up.
Temperatures Wednesday and Thursday, according to the NBC 5 Storm team, are expected to hover in the high 30s but drop as the week goes on.
Friday, Saturday and Sunday
A second rapid system is expected to blow through Illinois and Indiana on Friday, with mixed precipitation and possible additional snow, forecast models show.
While the buildups probably won’t amount to much, more will come in behind as the weekend continues.
On Saturday, an afternoon system is expected to push snow into northern Illinois, according to the NBC 5 Storm team, hitting areas west and north of Chicago harder than Wednesday’s system does. probably will.
This snow will likely persist into Sunday afternoon, bringing additional accumulations and causing more travel issues on area roads.
Temperatures on Friday are expected to be in the low to mid-30s, according to the NBC 5 Storm team. On Saturday however, temperatures will drop, with highs between 20 and 30 degrees.
Sunday is expected to be cloudy and cold, with highs in the upper 20s.
Total forecast snowfall
According to the NBC 5 Storm team, Wednesday through Thursday the heaviest snowfall accumulations are likely to occur around Lake Michigan and northern Indiana, with two to four inches of snowfall possible in Cook, DuPage counties. , Kendall, Will, Kankakee and Grundy in Illinois.
In northern Lake County, Illinois, those totals can be a little lower, with forecast models showing up to two inches.
In Indiana’s Lake, Porter, Newtown and Jasper counties, however, those totals are likely to be higher, with four to five inches of accumulation possible.
Additionally, persistent showers, particularly in northwest Indiana, could increase accumulations.
On Saturday and Sunday, the snow is expected to have a greater impact on the northern and western suburbs of Chicago, but the storm’s track could potentially change in the coming days as more data enters the NBC 5 team forecast. Storm.
As it stands, forecast models show an additional two to four inches of snow could be added by Sunday evening, with the heaviest accumulations likely north of Interstate 80.