Sunday, June 03, 2012

Afternoon Thunder Possible

We're in the 60's at 8 AM under a brilliant and bright sky -- with temperatures poised to get into the middle and upper 70's this afternoon for highs.  While we're sunny now, skies will not stay that way through the day.  Upper level energy over the Great Lakes is beginning to ooze eastward and has a band of showers and thundershowers extending from Western New York State south into Pennsylvania, pushing southeast.  That band of showers/storms shows up pretty nicely on the NAM's higher resolution variant for this afternoon (below), showing a band of showers or storms from the Poconos back to Harrisburg by 4 PM, looking to move down towards Philadelphia.

Any shower or storm that does pop could bring locally gusty winds, perhaps some small hail with it, as it moves southeast, but widespread severe weather is not likely.   Shower chances will increase after 3 PM across the region and continue through sunset before tapering off.

The shower/storm threat today will be the tip of an unsettled regime that will rule the roost over the Delaware Valley this week as the aforementioned upper level energy slowly meanders through the Northeast, bringing chances for showers each afternoon and temperatures that will be several degrees cooler than average through Thursday.