A burst of precipitation overnight is forecast to coat the Baltimore region with a dusting of snow followed by more than a tenth of an inch of ice.
A warm front is expected to reach the area Saturday, but as it meets the frigid air ahead of it, wintry precipitation is forecast to fall before temperatures rise much.
Snow is forecast to start falling around midnight, before changing to freezing rain as temperatures start to warm in higher levels of the atmosphere. By midday, temperatures are forecast to rise into the upper 30s, turning any lingering precipitation into rain.
Forecasters expect less than an inch of snow and then a tenth of an inch to a quarter of an inch of ice.
Temperatures are forecast to rise throughout the day and night Saturday, from the upper 20s in the early morning to the mid-40s by sundown and the lower 50s by midnight.
How slowly or quickly they rise in the morning hours will help determine whether the amount of icy precipitation that falls meets or exceeds predictions.
The entire Baltimore region is under a winter weather advisory from midnight through 9 a.m. Saturday.
On Sunday, temperatures are forecast to rise to the mid-50s before falling back to more seasonable levels in the 20s and 30s for the work week.