If you have tickets for a Southwest flight out of Baltimore-Washington International Airport, probably not, reports Dr. Gridlock. Meanwhile, the Metropolitan Washington Airports Authority, who handles flights in and out of both National and Dulles, says that there have been several domestic cancellations already, with more likely as snow accumulates and visibility gets worse tonight. All airports are currently open, but people who have flights tonight should call their airlines to check on the status of their flight. Service on inter-city bus lines is also rather spotty, with many lines canceling trips tonight and tomorrow. Amtrak is running along the Northeast Corridor this evening, but has warned that tomorrow’s service may be interrupted due to the weather.