Crews are hard at working trying to keep the runways at area airports in the clear.
If you are leaving work for home this afternoon, highway agencies say you should use extreme caution.
The departments of transportation in D.C., Virginia, and Maryland say if you don't have to be on the road, stay home. For those who did drive into work this morning, Joan Morris at VDOT says the earlier you leave for home the better.
"With these cold temperatures and the blowing and drifting we are going to get, we are going to have a nasty time out on the roads," Morris says.
Thousands of plow trucks and salters are working around the clock to clear snow in our region -- an effort that will continue after the snow stops, says Valerie Burnett Edgar at the Maryland State Highway Administration.
"Generally it takes us four to six hours after the snow stops to get down to bare pavement," Edgar says. "Combined with icy conditions it could be very treacherous overnight."
At Reagan and Dulles Airports, spokesman Robert Yingling says the runway clearing teams are dealing with a typical winter storm.
"We have numerous flight cancellations going through the afternoon and evening," Yingling says. "There are some flights that are planning to operate especially international flights."
More than a third of flights leaving out of National Airport Tuesday have been cancelled, as of 5 p.m. So check with your airline before heading to the airport.