Friday, July 20, 2012

Damp, Occasionally Drenched Today

 Rain is moving in a slow clip through portions of the region this morning, bringing a needed downpour but also setting the theme for the day today.  Mid level energy in the atmosphere is moving over Pennsylvania today, interacting with higher levels of moisture in the atmosphere and an east wind off of the Atlantic since a frontal boundary is just south of Philadelphia.  The result will be occasional showers and thunderstorms through the course of the day.

Computer modeling suggests that the city and points north will get showery rains on a more consistent basis through today, while south of the city will see some shower and thunderstorm activity this morning followed by a break around midday, and more rain and thunder this afternoon and evening.  A slight risk of severe weather is out generally south of a Wilmington-Atlantic City line for the potential of gusty winds in the strongest of storms...the best threat for any severe will be farther south but a strong or severe storm can't be ruled out across most of Delaware.

Rainfall will be heavy at times for a number of locations.  That said, there will be dry pockets, generally south and west of the city, that won't see as much rainfall as others.  The highest rainfall totals could be on the order of a couple of inches.  Keep in mind that it's not going to be a widespread soaking for all -- these rainfall amounts will be scattered around so some places will see a lot less than others.

Highs today will range from the lower 70's north to the lower 80's over Southern Delaware.  Philadelphia looks to avoid 80 degrees today for a high -- it should only get to about 76 or 77 for a high today.