Hi Andee! My brother says be sure & keep checking with your airline throughout Tuesday - perhaps every 6 hours or so. As CCG says, storm predicted to make landfall Tues morn or so - however, they are also predicting the storm cell itself is looking to park itself over PA (the rain & wind) for awhile...
If storm goes as currently predicted, brother doubts there will be much/any flights going/landing in Philly on Tuesday. That will create backlogs as they try rerouting flights. And then a lot from there will depend on how long it hangs about in PA.
It may be that your Wed flight could be delayed or maybe rerouted away from Philly to elsewhere. So definitely stay in touch with airline - could affect how soon you need to be at airport, as they will be sure to keep your flight safe. Hope it goes smoothly for you.