I just learned about this site flightaware.com. You can watch in real-time or look back on flights and see the routes flown. Today this was my flight from msp to phl. We took a little turn to the left over michagan because some clown was diverting around some cells and figured we should do the same... Up in Northern MI, I figured the cells were below us and decided to turn back towards philly. You can see the hold we entered east of philly on the arrival. We were about 15 mins from diverting to Baltimore for more gas. Glad that didn't happen. Last day and I was ready to head home.