WASHINGTON (AP)- After recent snowstorms, temperatures dropped into the single digits Tuesday, March 4 in the Northeast and parts of the mid-Atlantic.
Airports in Baltimore and near Washington, DC have seen record-low temperatures for the month of March. Tuesday morning, the temperatures plummeted to four degrees at Baltimore's airport, breaking a record set over one hundred years ago in 1873.
Dulles International Airport near Washington saw thermometers drop to one degree below zero, tying the month's record, which was set in 1993.
Government offices and schools along the East Coast were closed again Tuesday, or at least had a delayed opening. In some places, a half-foot of new snow has fallen, and given the temperatures it won't be melting soon.
Forecasters have said it's thanks to the return of the "polar vortex" -- in which the jet stream brings cold air down from extreme northern latitudes.