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Lee’s March Across the Appalachians

Sediment Plumes in the Hudson River
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Sediment Plumes in the Hudson River

These images from September 12, 2011, and September 2, 2010, compare conditions in the Hudson River near Ellis Island. In the wake of storms, sediment filled the river in 2011.

Land Water Severe Storms Human Presence World of Change

Muddy Susquehanna in Harrisburg, Pennsylvania
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Muddy Susquehanna in Harrisburg, Pennsylvania

Acquired September 10, 2011, this natural-color image shows the muddy Susquehanna River flowing through Harrisburg, Pennsylvania.

Severe Storms

Tropical Storm Lee
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Tropical Storm Lee

One week after Hurricane Irene battered the eastern U.S., a less-touted, more plodding storm soaked the eastern half of the country with more rain than its predecessor.

Image of the Day Atmosphere Severe Storms

Tropical Storm Lee
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Tropical Storm Lee

Acquired September 2, 2011, this natural-color image shows Tropical Storm Lee over the Gulf of Mexico.

Atmosphere Water Severe Storms