In the afternoon, a massive storm broke over the city of Philadelphia, Pennsylvania. The remarkable element of the storm was the massive downpour of hailstones, some reportedly measuring three inches in diameter. The so-called "Great Hail-Storm" was said to have broken up to half a million panes of glass in the city. (By John Osborne)
Source Citation
J.Thomas Scharf and Thompson Wescott, History of Philadelphia 1609-1884, in three volumes (Philadelphia, PA: L.H. Everts & Co., 1884), II: 834.