The longest-standing daily precipitation record dates to 1872 in Philadelphia, when 2.11 of rain was measured.
It so happens that 1872 was the very first year that reliable precipitation records were kept as part of the new national observing network.
The rains were associated with a hurricane that had formed in the Gulf and moved through the Delmarva. Over a two-day period, 4.68 inches fell in Philadelphia.
There’s an outside chance that the Oct. 26 will be challenged today, but it is more likely that some of the rain will lap into tomorrow.
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