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2018 Spring Flood Outlook Update

spring outlook map

On March 15, NOAA issued its three-month U.S. Spring Outlook, highlighting a moderate risk of flooding in the Ohio River Valley basin and lower Mississippi River where stream flows and soil moisture are well above normal after major flooding from recent heavy rainfall. Even ahead of the typical spring flood season, heavy rainfall has already caused damaging floods in the Ohio and Mississippi River basins and brought record flooding to the lower Great Lakes region. Flooding that began in mid-February is still ongoing for parts of the middle and lower Mississippi Valley and is forecast to continue for at least the next few weeks. Through May, moderate flooding is likely in the lower Mississippi Valley, parts of the Ohio River Basin, the Illinois River Basin, and in parts of the lower Missouri River Basin. Minor flooding is possible in parts of the Columbia River and upper Missouri River Basin as above-normal snowpack in the Northern Rockies melts.


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