Another component to the awful spring weather was historic river flooding.
Heavy rain in April from the Ozarks to the Ohio Valley sent first the Ohio River, than the Mississippi River Basin from southeast Missouri to Louisiana (before/after images) into major flood.
Record flooding was measured in at least 23 locations from southern Illinois to Mississippi, including Cairo, Ill., New Madrid, Mo., and Vicksburg, Miss from late April through mid-May (see photos) The sheer volume of flood water in the Mississippi River forced the demolition of the Birds Point Levee in southeast Missouri and the opening of the Morganza Spillway in Louisiana for the first time since 1973.
While this was happening, heavy April rain coupled with melting snowpack lead torecord flooding along Lake Champlain. (Read article from May 6)
As the flood from one great river receded, levels just begun to rise on another. Melting of a heavy winter snowpack in the northern Rockies, coupled with an historically wet May there lead to massive flooding in the Missouri River Basin from Montana to Missouri lingering into the summer months. (Read: How it happened)
All bridges crossing the Missouri River for more than 100 miles were closed at one time. Sections of I-29 and I-680 in Iowa and Missouri were flooded and damaged. Some farmland was flooded for months.
Record flooding from the Souris ("Mouse") River inundated parts of Minot, N.D. in late June. An estimated 11,000 were evacuated from the city. FEMA estimated 800 homes may have to be razed after being inundated by at least 6 feet of water. (See photos)
How many hurricane seasons can you name that left their most indelible mark on the Northeast?
First, Hurricane Irene rode up the East Coast, dumping inundating rain on areas saturated from a snowy winter, wet spring, and soaked summer.
- Record flooding in at least 19 locations
- Historic flooding damaged numerous homes and roads, cutting off communities in Vermont (see photos).
- August 2011 was the record wettest month: Allentown, Pa. (13.47"), Philadelphia (19.31"), New York City (18.95").
Then, remnant moisture from what was
Tropical Storm Lee inundated parts of the South and interior Northeast, particularly from Virginia to Upstate New York (
see photos).
Record flooding hit the Susquehanna River Basin in New York and Pennsylvania, with some flooding exceeding levels from June 2006 and Agnes in 1972. This included both Binghamton, N.Y. and Wilkes-Barre, Pa.
All in all, January - August, 2011 was the record wettest such period on record (dating to 1895) in Connecticut, New Jersey, New York, Pennsylvania, and Ohio. It was the second wettest such period in Vermont and North Dakota. (see map of highlights)
NEXT > 2011's Extremes: Drought
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