US Streamflow Conditions for Late April

April 26, 2001


Provided by: USGS
Summary authors & editor: Jim Foster

Looking at the above image, it's easy to understand why the upper reaches of the Mississippi River have been flooding. The black dots represent streams that recorded new record high streamflow values for the day, and the blue dots show streams that are at or above the 90th percentile - a river discharge at the 90th percentile is equal to or greater than 90 percent of the discharge values recorded on this day of the year during all years that measurements have been made. Note, streams in northern New England are also experiencing high volumes of water. In contrast, the brown and red dots are indicative of below-normal streamflow. The southern Midwest states, the Carolinas, and parts of the northwest US, Florida, Georgia, and Mississippi show below-normal streamflow conditions.

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