long after the snow stopped falling many commuters were embroiled in a traffic nightmare. dozens of cars were involved in a pileup 15 miles outside of the city. it started when two semi trucks jackknifed on a slick highway and shut down the road for two hours. but there were no serious injuries. a new system is bringing more snow to chicago and detroit today. a few additional inches on top of a foot and a half already on the ground. schools in detroit are closed for a second straight day as the city struggles to clear roads and driveways. for more on what is in store for today, we turn to accu-weather's stef davis. stef, good morning. >> reporter: thank you. the storm is finely over across much of the northeast. high pressure building in for our tuesday allowing conditions to improve. dry weather with plenty of sunshine but we will have a cold flow coming in from the north. that will send temperatures dropping. daytime high in buffalo 19. 24 the daytime high in the big apple. well below average for this time of the year and we are tracking the threat for more snowfall