From the FAA's site:
Philadelphia International Airport (PHL) Real-time Status
The status information provided on this site indicates general airport conditions; it is not flight-specific. Check with your airline to determine if your flight is affected.
Due to WEATHER, LOW CIGS, there is a Traffic Management Program in effect for traffic arriving Philadelphia International Airport, Philadelphia, PA (PHL). This is causing some arriving flights to be delayed an average of 56 minutes. To see if you may be affected, select your departure airport and check "Delays by Destination".
Delays by Destination:
* Due to LOW CIGS/VSBY,SNOW, departure traffic destined to Chicago OHare International Airport, Chicago, IL (ORD) is currently experiencing delays averaging 2 hours and 40 minutes.
General Departure Delays: Due to WX:LOW CIGS, traffic is experiencing Gate Hold and Taxi delays between 31 minutes and 45 minutes in length and increasing.
General Arrival Delays: Arrival traffic is experiencing airborne delays of 15 minutes or less.
This information was last updated: Jan 5, 2005 9:35:16 AM EST