A record rain event in May in eastern Montana combined with high water from storms in April and May (and early spring snow melt) and brought high water to the Missouri River chain of reservoirs.  The high water levels plus the threat of flood waters due an unusually high snow pack in the Rockies over the upper Missouri River Basin and additional heavy rain all contributed to record releases from the Missouri River Reservoirs. Releases from Gavins Point Dam, which is the last in the chain, increased to over 100 kcfs during the first week of June and then rose to around 160 kcfs by the middle of the month.  The previous record release was 70 kcfs.  The high releases produced flooding along the Missouri River which gradually worsened from May into June and then continued into July.

Flood in NEMAHA, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: PERU
Flood cause: Heavy Rain / Snow Melt
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened during June as record releases from Gavins Point Dam and periodic heavy rains brought widespread flooding along the river.  The Missouri River at Brownville started June around 39 feet, flood stage is 33 feet.  The river gradually climbed to a record crest around 45 feet by the end of the month before falling as downstream levees were breached and widened by flooding.  However, significant flooding persisted into July.  One man drowned early on June 26th when the boat he was fishing in capsized as it traveled from the Little Nemaha River, where it was launched, onto the flood waters of the Missouri River.  Roads, including Highway 136 in Missouri, and the access road to a nuclear power plant, flooded as did recreation areas and farmland along the river.  The flooding of Highway 136 prompted the closure of the Brownville, Nebraska bridge over the Missouri River.  Over 8,000 acres were covered in flood waters at one point early in June and that number likely grew as the month progressed.

Flood in WASHINGTON, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: BLAIR ARPT
Flood cause: Heavy Rain / Snow Melt
Property damage: 550.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened during June as record releases from Gavins Point Dam brought widespread flooding along the river.  The river near Blair climbed to around its 26.5 foot flood stage late in May, and then steadily rose into mid to late June climbing to a little over 32 feet during the last week or so of the month.  The flooding in Washington county was especially felt in the Fort Calhoun area where at least 60 homes or cabins were flooded or cutoff by flood waters.  At least 200 residences in the county were evacuated leaving at least 500 people displaced.  This prompted the city to open the high school up for flood victims.  Blair spent $500,000 to build up a levee surrounding its water treatment plant which held through June.  The Ft. Calhoun Nuclear power plant was in refueling shut-down when the flooding started in April and because of the high waters it remained shut down through the summer as flood waters surrounded the plant prompting emergency sand-bagging.  In addition, recreation areas and roads along the river were flooded.  A 58 year-old male drowned when working on a levee near Ft. Calhoun when his truck overturned into flood waters.  The flooding persisted into July.

Flood in CEDAR, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: ATEN
Flood cause: Heavy Rain / Snow Melt
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened over the area during June as record releases from Gavins Point Dam brought areas of lowland flooding along the river.  In Cedar county the flooding generally began during the first week of the month as flows out of Gavins Point Dam reached and exceeded 100,000 cfs on the way to 160,00 cfs.  A few seasonal or permanent homes were threatened by the flood waters, but in general the flooding was confined to low areas and farmland along the river.  The flooding continued into July.

Flood in THURSTON, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: WINNEBAGO
Flood cause: Heavy Rain / Snow Melt
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened over the area during June as record releases from Gavins Point Dam brought widespread flooding along the river.  Releases from Gavins Point Dam reached around 160,000 cfs after mid June and the high flows continued through July.  In Thurston county the flooding generally began during the first week of the month as the gauge at Sioux City, upstream, and Decatur, downstream, didn't surpass flood stage until around June 6th. River levels at both of those locations reached the moderate category.  Flooding in Thurston county was mostly confined to agricultural lowlands, recreation areas and roads near the river, but the flooding did force the evacuation of 12 people near Macy. The flooding persisted into July.

Flood in BURT, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: DECATUR
Flood cause: Heavy Rain / Snow Melt
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened over the area during June as record releases from Gavins Point Dam brought widespread flooding along the river.  In Burt county the flooding generally began during the first week of the month as the gauge at Decatur didn't surpass flood stage until around June 6th.  However, by the middle of the month the gauge had climbed above 38 feet and reached around 40 feet by the end of the month.  Flood stage at Decatur is 35 feet.  Flooding in Burt county especially affected agricultural lowlands, recreation areas and roads near the river but also forced evacuation of 150 to 200 homes.  Late in the month the Highway 175 bridge over the Missouri between Decatur and Onawa was closed due to erosion of the abutment on the Iowa side of the bridge.  The flooding persisted into July.

Flood in DOUGLAS, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: EAST OMAHA
Flood cause: Heavy Rain / Snow Melt
Property damage: 3.00M
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened during June as record releases from Gavins Point Dam brought widespread flooding along the river.  At Omaha the river climbed to around its 29 foot flood stage late in May and rose steadily through June reaching around 35 feet late in the month.  The flooding in Douglas county along the Missouri River closed several parks, boating accesses, and recreational areas.  Low areas around downtown on the river side of the Levee began flooding when a flood wall was installed.   The south Omaha waste water treatment plant was forced to send 6 million gallons of waste water daily into the river early in June due to flood waters affecting the facility.  The high water and persistent pressure on levees forced Eppley Airfield and other businesses to constantly monitor the situation and have pumps on standby as either rains, storm sewer backups or minor boils near the levee would force pumping of the water back over the levee.  By June 22nd Eppley had already spent 2.5 million dollars on flood prevention.  Burlington Northern had to shut down one of its tracks to allow it to be used as a levee, this forced Amtrak to close that link of service.  The flooding persisted into July.

Flood in SARPY, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: AVERY
Flood cause: Heavy Rain / Snow Melt
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened during June as record releases from Gavins Point Dam brought widespread flooding along the river.  The river near Omaha climbed to around its 29 foot flood stage late in May and steadily rose through June reaching around 36 feet toward the end of the month.  The flooding then persisted into July.  The flooding in Sarpy county spread into at least one park causing its closure. Boating and other recreational areas were also either flooded or closed.  A section of the rail track that Amtrak used had to be closed to allow for its use as a levee.

Flood in CASS, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: PLATTSMOUTH
Flood cause: Heavy Rain / Snow Melt
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened during June as record releases from Gavins Point Dam brought widespread flooding along the river.  The river at Plattsmouth started the month around 30 feet, flood stage is 26 feet.  The river then gradually rose through June reaching a little over 36 feet by the end of the month.  The river remained in major flood stage into July.  The high water initially flooded marshy areas and farmland along the river along with a few roads and recreation areas, including a road to the Plattsmouth water treatment plant.  By the middle of the month some businesses and homes began to flood and most of 210 dwellings around Lake Waconda in the area were evacuated.

Flood in OTOE, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: NEBRASKA CITY ARPT
Flood cause: Heavy Rain / Snow Melt
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened during June as record releases from Gavins Point Dam brought widespread flooding along the river.  The river at Nebraska City, which climbed above its 18 foot flood stage in mid April, started June around 23 feet and then began rising by the 10th eventually reaching a record crest of around 28 feet by the end of the month.  The river stayed well above flood stage through July. In Otoe county farmland, roads and recreation areas near the river flooded as did some cabins and a grain elevator near Nebraska City. Flood waters crossed Highway 2 in Fremont county Iowa prompting its closure on both sides of the river.

Flood in RICHARDSON, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: BARADA
Flood cause: Heavy Rain / Snow Melt
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened during June as record releases from Gavins Point Dam brought widespread flooding along the river.  The river at Rulo started June a little under 23 feet, flood stage is 17 feet.  The river rose to a record crest around 27 feet by the end of the month before falling slightly as levees were breached and widened by the flood waters.  However, flooding persisted into July.  The high water initially flooded marshy areas and farmland along the river, but then it began flooding roads, cabins and recreation areas by the river. Highway 159 in Holt county Missouri flooded by the middle of the month prompting the closure of the Rulo, Nebraska bridge over the Missouri River.

Flood in KNOX, NEBRASKA
From 01-JUN-11 00:00:00 to 30-JUN-11 23:59:00 (CST-6)
Location: VERDEL
Flood cause: Heavy Rain / Snow Melt
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flooding along the Missouri River gradually worsened over the area during June as record releases from Ft. Randal Dam brought widespread flooding along the river.  In Knox county the flooding closed Highway 12 between Verdel and Niobrara and east of Niobrara and also closed Highway 14/37 north of Niobrara.  The flooding also forced the evacuation of 50 to 60 residences including the Lazy River Acres area in between Niobrara and Verdel.  The flooding carried over into July.