Rising Rivers in the U.S. Midwest
acquired April 12, 2011 download large image (11 MB, JPEG, 5200x6000)
acquired April 12, 2011 download GeoTIFF file (58 MB, TIFF, 5200x6000)
Rising Rivers in the U.S. Midwest
acquired March 2, 2011 download large image (11 MB, JPEG, 5200x6000)
acquired March 2, 2011 download GeoTIFF file (60 MB, TIFF, 5200x6000)
acquired March 2 - April 12, 2011 download Google Earth file (KMZ)

Waters continued rising in April 2011 in the U.S. Midwest. On April 13, the Advanced Hydrological Prediction Service (AHPS) of the U.S. National Weather Service warned of flooding along the Mississippi and Wisconsin Rivers. The AHPS reported major flooding of the Wisconsin at Portage, and varying degrees of flooding at many locations along the Mississippi, including Muscatine and Gladstone.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired these images on April 12, 2011 (top), and March 2, 2011 (bottom). Both images use a combination of infrared and visible light to increase the contrast between water and land. Snow is turquoise; water is navy; and iced-over water bodies are bright blue. Clouds range in color from blue-green to nearly white. Vegetation is green and soil is earth-toned. The redder hues in the April image may result from the angle of the satellite sensor.

Snow blankets roughly the northern third of the area in early March, and ice appears along the Mississippi River. Several weeks later, the snow has disappeared, and the Mississippi has widened downstream. Nearly invisible in early March, the Wisconsin River is easily identified in April. The Illinois River, in contrast, appears to show little change.

  1. References

  2. U.S. National Oceanic and Atmospheric Administration. National Weather Service. Advanced Hydrologic Prediction Service. Accessed April 13, 2011.

NASA images courtesy MODIS Rapid Response Team, Goddard Space Flight Center. Caption by Michon Scott.

Instrument(s): 
Terra - MODIS

Rising Rivers in the U.S. Midwest

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