PATCHY BLACK ICE OVERNIGHT ON UNTREATED SURFACES... A markedly colder Arctic airmass will overspread the region overnight, with low temperatures in the mid to upper teens. While the incoming colder, drier air will dry up much of the leftover standing water, some icy spots and black ice are likely late tonight into Wednesday morning. Proceed with extra caution while outside. Motorists should drive slowly and allow for extra spacing between vehicles.