From 12 a.m. until 6 p.m. on Tuesday, NWS predicts temperatures to feel like 15-below-zero.
The actual temperature will drop into "single digits overnight," the NWS said.
Tuesday temperatures are predicted to rise to the teens, but with winds up to 25 mph and gusts up to 35 mph, it's going to feel a lot colder, the NWS said.
"Low temperatures and wind chill could cause frostbite and lead to hypothermia," said the D.C. Homeland Security and Emergency Management Agency.
"If you have to go outdoors in these conditions please dress warm with a coat, hat and gloves."
- Prepare for extreme cold with these tips from health officials and a special note from the MPD Chief of Police.
See our timeline of when the weather will change over the next few days.