Some snowflakes fell across the Baltimore region during the first morning rush hour of the new year, and more flurries are possible later Monday.
Temperatures are dipping below normal for only the second time since November — Monday's high as of 1 p.m. was 37 degrees and Tuesday's is forecast at just 33.
Lows are forecast in the upper teens. It has not been colder in Baltimore since temperatures dropped to the single digits March 7.
Baltimore Health Commissioner Leana Wen declared a "Code Blue" advisory overnight, urging vulnerable and homeless residents to seek shelter.
A cold front moving into the region Monday brought some light snow. As much as a few inches were predicted in Western Maryland, but a winter weather advisory in Garrett County was canceled as precipitation did not materialize as heavily as predicted.
State Highway Administration spokesman David Buck said moderate snowfall Monday morning was not sticking to Interstate 68 in western Maryland. He said no problems were reported on side roads in the region.
Given that December was the mildest on record for the region, it is a first taste of snow and cold for many. The Western Maryland area — generally colder and snowier than the rest of the state — has seen about an inch or two already from a handful of coatings this winter.
The Wisp ski resort in McHenry, in Garrett County, reports that 2 inches of snow have fallen so far there this season. The area typically gets 100 inches of snow from late fall to early spring.
At Liberty Mountain Resort in Carroll Valley, Pennsylvania, snow-making machines were blasting flakes onto the slopes Monday, but officials said they still did not know when they will open for the season.
The Associated Press contributed to this report.