(WXYZ) - On August 11, 2014, parts of metro Detroit were hit with some of the heaviest rainfall in recorded weather history.
It happened after tropical moisture quietly crept into metro Detroit overnight Sunday into Monday morning the 11th.
The humidity was high at dawn, but the initial rainfall was light to moderate at most.
The air filled with copious potential rainfall began to interact with a slow moving low pressure area crawling up from the southwest later in the day.
Occasional thunder and lightning were mixed in with the heaviest downpours, but most of the insidious flood-producing rains came from storms that moved very slowly, often less than 10 miles per hour, and re-formed over some of the same areas between about 5 pm and 9 pm.
The storms squeezed nearly all available moisture out of the atmosphere over a region not prepared for tropical storm-like rates of rainfall.
The information below was put together by the National Weather Service office in White Lake Michigan.
It contains measured rainfall amounts for many location around southeast Michigan and could be helpful for anyone submitting a claim to an insurance agency or government agency.