It's a bit of a misnomer to say today's outcome is that of a warmer storm. It certainly isn't all that warm outside this morning and the atmosphere is cold enough to generally support snow for most locations in Philly and points northwest if there was sufficient moisture...although it would be a wet snow. However, the problem is that we're dealing with two separate pieces of energy that are remaining distinctly separate and look to provide a 7-10 split on precipitation over the Delaware Valley.
Northern energy continues to hold firm and isn't giving up quite as quickly as we thought...between this and the developing coastal off of the Carolina coastline, usually you see a precipitation or energy transfer take place as the coastal feature intensifies and becomes the dominant feature. The timing on this transfer is always the tricky part and for the most part modeling was suggesting that transfer would take place near the Delaware Valley. However, the northern feature is maintaining itself longer...and thus that separation between it and the coastal will hold firm into our region as well.
We're still of the mindset that an inch or so of wet snow falls in the city -- not all of it may stick -- but it's enough to get something out of today. North and west have a shot at getting a couple of inches of snow, perhaps 3" towards I-78, with 3-5 in the Poconos and across North Jersey. South and east of 295 does not look good for much...generally less than an inch with drizzle and light rain falling.
We'll keep an eye on things through the day and update off and on as appropriate. Unfortunately for snow lovers, it's not looking as good as it was 24 hours ago.