When you scan the list of our rainiest days on record, many are in July. That's because July tends to have the most thunderstorms, which can produce incredible downpours.

That happened in Delaware on this date in 1975. On July 13, 8.5 inches of rain fell in Dover. Until Floyd rewrote the record book last year, that 8.5 inches was the Delaware state record for the most rain in one day.

Just to show how hit and miss summer thunderstorms can be, Lewes only got half an inch, while Wilmington got nearly 3 inches that day. You can really see how a distance of just a few tens of miles can mean the difference between dangerous flooding rains and a manageable summer downpour.

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