If you were planning to fly out of Lambert your connecting flight could be affected.
More than 2,100 flights nationwide already have been canceled for today because of the big snowstorm that's threatening the Northeast. Additional flights have been canceled through tomorrow.
The website FlightAware says United Airlines has scrapped some 900 flights for today, Delta has canceled 740 and American Airlines, about 200. The airports with the most cancellations are in the New York area and in Boston. Airlines have issued waivers that allow affected passengers to change their travel date without paying a change fee.