The National Weather Service has issued a freezing rain advisory for much of the greater Washington area, from Fredericksburg to northern Baltimore for the early- and mid-morning hours Friday that could affect morning commutes.
The advisory is in effect from 3 a.m. to 9 a.m. Friday.
Accumulation of less than a tenth of an inch is forecast. The temperature should be around 30 degrees.
Untreated surfaces will be icy and slippery, particularly during the morning commute, the advisory states.
A freezing rain advisory means that periods of freezing rain or freezing drizzle will cause travel difficulties, according to the National Weather Service.
Drivers are asked to slow down and use caution.
The weather service forecasts precipitation becoming all rain after 9 a.m. Friday in McLean.
Friday's high should be near 42.