Several episodes of heavy rain in eastern Nebraska and southwest Iowa combined with high flows upstream from snow melt and rain brought a prolonged period of flooding along the Missouri River, initially generally downstream of Plattsmouth, but by the end of the month it affected areas upstream as well.  The flooding mainly affected marshy areas and farmland along the river, but a few roads and recreation areas were also flooded and the flooding got progressively worse in June.

Flood in OTOE, NEBRASKA
From 01-MAY-11 00:00:00 to 31-MAY-11 23:59:00 (CST-6)
Location: NEBRASKA CITY ARPT
Flood cause: Heavy Rain / Snow Melt
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

This flooding carried over from April when several episodes of heavy rain combined with high releases from upstream reservoirs due to snow melt and rain caused a prolonged flood along the Missouri River.  The river at Nebraska City, which climbed above its 18 foot flood stage in mid April, dipped slightly toward flood stage by the 10th but then steadily rose in stages through the rest of May reaching around 23 feet by the end of the month.  The flooding carried into June.  In May the flooding affected farmland and marshy areas along the river, and also flooded a few roads and recreational areas by the river.

Flood in NEMAHA, NEBRASKA
From 01-MAY-11 00:00:00 to 31-MAY-11 23:59:00 (CST-6)
Location: PERU
Flood cause: Heavy Rain / Snow Melt
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

This flooding carried over from April when several episodes of heavy rain combined with high releases from upstream reservoirs and caused a prolonged flood event along the Missouri River.  The river at Brownville, which climbed above its 33 foot flood stage in mid April, dropped toward it's flood stage on May 10th but then rose in stages after that and ended the month around 39 feet.  The flooding carried over into June. Although the high water mainly flooded marshy areas and farmland along the river, it also started flooding a few roads and recreational areas by the river by the middle and end of May.

Flood in RICHARDSON, NEBRASKA
From 01-MAY-11 00:00:00 to 31-MAY-11 23:59:00 (CST-6)
Location: BARADA
Flood cause: Heavy Rain / Snow Melt
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

This flooding carried over from April when several episodes of heavy rain combined with high releases from upstream reservoirs and caused a prolonged flood event along the Missouri River.  The river at Rulo, which climbed above its 17 foot flood stage in mid April, briefly fell to around flood stage on the 10th then steadily rose ending the month a little under 23 feet.  The flooding carried over into June.  The high water initially flooded marshy areas and farmland along the river, but then it began flooding a few roads, cabins and recreation areas by the river.

Flood in CASS, NEBRASKA
From 01-MAY-11 00:00:00 to 31-MAY-11 23:59:00 (CST-6)
Location: PLATTSMOUTH
Flood cause: Heavy Rain / Snow Melt
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

High releases from upstream reservoirs and periods of rain brought a prolonged flooding episode along the Missouri River.  The river at Plattsmouth started the month a little above it's 26 foot flood stage, fell briefly below it from the 5th through the 11th, then steadily rose to a little over 30 feet by the end of the month.  The flooding carried over into June.  Although the high water mainly flooded marshy areas and farmland along the river, by the end of the month a few roads, recreational areas and cabins/houses were either flooded or threatened by flood waters.