Friday, August 03, 2012

Perhaps A Storm Later, Otherwise Hot

We're starting off in the 70's in much of the region this morning under mostly clear skies.  There's some patchy pockets of fog but those will burn off quickly as the sun works its magic on the ground after sunset.  Today is shaping up as a hot, humid, summery day as temperatures bump into the middle 90's away from the ocean (mid and upper 80's at the Shore and Delaware Beaches).  Combining the effects of heat and dew points around 70, heat index values will flirt with 100 degrees this afternoon.  Heat advisories are out for the counties shaded in orange up above.

There is a chance of a few pop up thunderstorms this afternoon -- a weak frontal boundary is trying to slide down from the north and it will act as a trigger for isolated to perhaps a smattering of thunderstorm activity.  The best chances will be north of Philadelphia (30%) compared to city and south (20%), a reversal of yesterday which saw thunderstorm activity in Lancaster County and also in the state of Delaware.  Like yesterday, not everyone gets a storm.  However, if you do it may be slow moving, produce heavy rainfall and gusty winds, and perhaps lead to localized ponding of water on roads and usual suspect low lying areas.