Sunday, July 28, 2013

Weather Rewind, July 21-27, 2013

Believe it or not, temperatures last week were below average in Philadelphia -- averaged 0.7 degrees below.  You can thank Thursday's cool 74 degree high for that. Besides the 8th 90 in a row and morning lows above 70 for the 28th, 29th, and 30th straight days, the latter half of the week was a good bit cooler than average and helped provide us our first cool week since May.

In addition to cool, it was rainy -- 3.05" of rain and thunder...much of it falling in Philadelphia on Tuesday morning but with other parts of the region picking up their fair share of rain on Monday night -- thanks to a disturbance tracking through the region.  Those rains in Philly were half of what other parts of Burlington, Lebanon, and Berks Counties picked up.  Heavy, slow moving thunderstorms Monday night coalesced around a line that marched through Philadelphia during the morning hours on Tuesday and dropped a lot of the rains that fell on Tuesday in the city. Not everyone picked up those prolific rains -- some spots got a lot less than others, but there were two or three belts of rather heavy rainfall that occurred between Monday night and Tuesday morning across the region.

Thursday featured a cool, showery theme at the Shore as low pressure organized along a cool front and pushed some precipitation along the coast. This brought our coolest July 25th to Philadelphia in fifty years (71 in 1964) and the resulting dry air mass in the wake of the front brought us our first respite from the 70 degree malaise since late June.