A number of flights to and from the US through Dublin have been cancelled because of heavy snowfall there.
The second major snowstorm in less than a week on the east coast has affected two Aer Lingus flights and a number of Continental flights to New York.
Intending passengers are advised to check with their airline.
The US National Weather Service is predicting up to 36cm of snow in New York and Washington, with Baltimore forecast to get up to 51cm and Philadelphia up to 48cm.
Forecasters say the storm, which US media have dubbed 'Snoverkill' and 'Snomageddon 2.0', will be packing strong winds that could cause additional power outages in a region already reeling from a major weekend snowstorm.
A blizzard warning has been issued for the Washington-Baltimore area, with nine hours of heavy snowfall and 50km/ph winds predicted.
Residents are still trying to dig out from record snowfalls of 46cm to 81cm from Washington to southern New Jersey.
Many are still trying to restock refrigerators and clear fallen trees before the new storm arrives.
The US Office of Personnel Management announced yesterday evening that federal agencies in the US capital region would remain closed today.
Most of the 230,000 federal employees in the Washington DC area are off work, costing an estimated $100m a day in lost productivity.
The UN is also closing its New York headquarters, while US Congress is curtailing legislative action and the cities of Boston, Baltimore, Philadelphia and Washington have announced that government offices will be closed.
Schools are closed across much of the region.
