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Thursday, June 21, 2012

Jeff Masters: Record flooding in Duluth, Minnesota, at the St. Louis River, June 21, 2012

Record flooding in Duluth, Minnesota

by Dr. Jeff Masters, WunderBlog, June 21, 2012

Figure 3. The St. Louis river upstream from Duluth, Minnesota, reached its highest flood height on record this morning, 6.1 feet above flood stage. The river rose over 10 feet in 24 hours. Image credit: NOAA.

Flood waters have crested in Duluth, Minnesota, this Thursday morning (June 21, 2012), and are slowly falling, in the wake of the city's all-time record 24-hour rainstorm. A series of "training" thunderstorms that followed the same path passed over a wide swath of northern Minnesota between noon Tuesday and noon Wednesday, dropping 7.20" of rain on the city. According to wunderground's weather historian Christopher C. Burt, this far surpasses the previous 24-hour record rainfall for Duluth, the 5.79" that fell on August 22-23, 1978. Two rivers in the Duluth area, the Nemadji and St. Louis, hit their highest flood heights on record Thursday morning, causing destructive flooding. Sadly, major flooding occurred at the Duluth zoo, washing a seal into a neighboring street, and killing at least eleven zoo animals.

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