Some Drizzle Possible Late Tonight

While the initial prospect for warmth on Sunday looked good at first glance, the reason the warm up gets delayed by a day is due to drizzle and light showers that could pop up later tonight. Higher resolution computer guidance is showing the potential for showers and drizzle across the area later tonight, lingering into the morning hours on Sunday. While not a significant "rain" event by any stretch, the presence of low clouds and moisture into Sunday morning may limit how much warming we see.

Temperatures aloft will warm a good deal but the surface wind trajectory (south) will pull in moisture off of the cool Atlantic.  That stable layer will reside underneath that warmth aloft and will lead to clouds for a good chunk of the day.   As winds nudge more southwesterly towards evening, dry and warm air to the southwest should begin to work in.  We could see some clearing in the clouds...at least some brightening...towards dinner.   70 may be a tough goal to realize but if we can coax a couple of hours of late afternoon sun temperatures could reach 65 in Philly.

At least Monday will be much, much warmer...even if it is just a single day event!