Great post! People tend to think of things in their immediate area and don't realize that weather problems in Denver can disrupt air travel in Bangor, Maine. Most of the weather delays I have endured have indeed been for weather in other parts of the country or weather that happened a day or two earlier. Most recently I spent 7 hours at ATL for a 30 minute flight to HSV all because of storms in upstate NY, which played havoc with the equipment needs for my particular flight.
Always schedule yourself to get to the port a day early!