This pair of images shows the shoreline of Lake Superior before (14 June 2018) and after (18 June 2018) the torrential rain that hit Michigan on 17 June 2018. Splotches of tan, red, and orange along the lakeshore indicate where rivers and streams carried muddy floodwater out of neighborhoods. The sediment is dominated by iron–rich soil called spodosols. These images were acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite. Photo: Joshua Stevens / NASA

By Kasha Patel
19 June 2018

(NASA) – In a matter of hours on 17 June 2018, torrential rains transformed parts of Michigan into a “state of disaster.” Early morning storms swept through the Upper Midwest, creating flash floods, a few fatalities, and historic property damage.

The potent storms developed when moisture in the mid and upper levels of the atmosphere from Hurricane Bud merged with a lower-level air mass rich in moisture. The torrential rains also affected parts of Wisconsin and Minnesota.

This pair of images shows the shoreline of Lake Superior before (14 June 2018) and after (18 June 2018) the downpour. Splotches of tan, red, and orange along the lakeshore indicate where rivers and streams carried muddy floodwater out of neighborhoods. The sediment is dominated by iron–rich soil called spodosols. These images were acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite.

Houghton County was hit the worst in Michigan. The town of Lake Linden received between four to seven inches of rain in seven hours. Nearby, the Trap Rock River received three inches, and its discharge was 331 percent above normal for 17 June 2018. The graph shows a connection between the amount of rainfall and river discharge, which is highlighted in the satellite image above. The graph shows how the increased rainfall over the area correlated with the high amount of river discharge for Trap Rock River. The data in this chart was provided by U.S. Geological Survey Water Resources.

Cumulative precipitation and river discharge on the Trap River, in Houghton County Michigan, during the torrential rainfall on 17 June 2018. Houghton County was hit the worst in Michigan. The town of Lake Linden received between four to seven inches of rain in seven hours. Nearby, the Trap Rock River received three inches, and its discharge was 331 percent above normal for 17 June 2018. This graph shows how the increased rainfall over the area correlated with the high amount of river discharge for Trap Rock River. The data in this chart was provided by U.S. Geological Survey Water Resources. Graphic: Joshua Stevens / USGS

Massive Amounts of Rain in Michigan

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