Record Flooding in Nebraska, Iowa, Captured in Satellite Imagery | Weather.com
The Weather Channel

See the before and after satellite images of the historic flood in Nebraska and Iowa.

By

Jonathan Erdman

March 16, 2019

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Record-setting flooding in Nebraska, western Iowa and South Dakota is so widespread it has been detected by satellite.

Triggered by a rare combination of rapid snowmelt, ice-covered rivers, saturated frozen soil, and heavy rain from the so-called "Bomb Cyclone", Winter Storm Ulmer, this massive flooding triggered evacuations, washed out bridges and swamped towns.

(MORE: Latest Flood News | Record Flood Recap)

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The first animation below is a wide view of the central Plains and Midwest, using imagery from NASA's Terra satellite.

On March 4, snow cover was widespread as the Plains were shivering in one of the coldest March outbreaks in years.

By the time skies cleared on March 15 after the Bomb Cyclone was long gone, most snow in Iowa and eastern Nebraska had melted due to warmer temperatures and rain from the storm.

High-resolution visible imagery from NASA's Terra satellite showing a wide view of the Plains on March 4, when snow blanketed virtually the entire region, then on March 15, 2019, after the Bomb Cyclone departed and skies cleared. The circle denotes the general area of flooded rivers shown by the satellite. (Note: Cloud cover did not allow a view of flooded rivers in Wisconsin on March 15.)

(NASA Worldview)

A tighter zoom into the area shows the contrast between the snow-covered Plains and the snowless terrain dominated by a number of swollen rivers in eastern Nebraska and western Iowa 11 days later.

Zoomed-in, high-resolution visible imagery from NASA's Terra satellite showing eastern Nebraska and western Iowa on March 4, when snow blanketed virtually the entire region, then on March 15, 2019, after the Bomb Cyclone departed and skies cleared, revealing flooded rivers and a lack of snow cover over much of the region.

(NASA Worldview)

To better illustrate the extent of flooding compared to normal river levels, we also examined satellite imagery on February 4, a relatively infrequent day in mid-winter with both mostly clear skies, but little snow cover.

We highlighted some of the most prominent flooded rivers with green arrows below, including the Elkhorn, Loup, Niobrara and Platte Rivers.

Northern Nebraska's Niobrara River, along which the Spencer Dam was heavily damaged, is highlighted by the green arrow near the top of the images below.

High-resolution visible imagery from NASA's Terra satellite showing eastern Nebraska and western Iowa on Feb. 4, when clear skies and little snow cover offered a view of rivers at normal levels, then on March 15, 2019, revealing flooded rivers, some of which are highlighted by green arrows.

(NASA Worldview)

Using a special GOES-East satellite product typically used to differentiate snow cover from low clouds and fog, the river flooding stands out even better, particularly the widespread flooding of the Missouri River north of Omaha.