Thunderstorms developed over eastern Nebraska during the evening of 5/19 ahead of a large upper level low pressure system over the Rocky Mountains and north of a warm front in Kansas.  The storms mainly produced areas of heavy rain...with 2 to 3+ inches common from David City and Wahoo south through Lincoln, Crete and Fairbury.  This produced some flooding around Wahoo and along the Big Blue River near Crete and the Little Blue River near Fairbury.

Flood in SALINE, NEBRASKA
From 20-MAY-11 16:00:00 to 23-MAY-11 10:30:00 (CST-6)
Location: WILBER
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Rainfall of 3 to 4 inches during the evening and overnight hours of 5/19 and 5/20 over Saline county and upstream.  This caused the Big Blue River to flood farmland and county roads around the Crete area.  The river at Crete crested just under 20.5 feet in the morning of 5/22, flood stage is 18 feet.

Flood in JEFFERSON, NEBRASKA
From 20-MAY-11 14:30:00 to 20-MAY-11 19:15:00 (CST-6)
Location: ENDICOTT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Rainfall of 2 to 3 inches fell across part of the lower Little Blue River basin causing it to briefly go above it's 17.5 foot flood stage near Fairbury.  The flooding mainly affected a county road or two and flooded some lowlands along the river but damage was minimal.

Flood in SALINE, NEBRASKA
From 21-MAY-11 02:30:00 to 22-MAY-11 05:30:00 (CST-6)
Location: DE WITT
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Rainfall of around 2 to 3 inches fell across a large part of the Turkey Creek basin in the evening and overnight hours of 5/19 and 5/20.  This water eventually caused Turkey Creek to flood in the Wilber area.  The creek crested a little over 12 feet in the morning of 5/21, flood stage near Wilber is 11 feet.  The flooding affected mainly agricultural lowlands along the river but a few county roads were also flooded.

Hail in SEWARD, NEBRASKA
From 19-MAY-11 18:50:00 to 19-MAY-11 18:50:00 (CST-6)
Location: MILFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SEWARD, NEBRASKA
From 19-MAY-11 19:08:00 to 19-MAY-11 19:08:00 (CST-6)
Location: GARLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, NEBRASKA
From 19-MAY-11 21:26:00 to 19-MAY-11 21:26:00 (CST-6)
Location: FAIRBURY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in SALINE, NEBRASKA
From 19-MAY-11 22:05:00 to 19-MAY-11 22:05:00 (CST-6)
Location: WILBER MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flood in SAUNDERS, NEBRASKA
From 20-MAY-11 13:00:00 to 20-MAY-11 22:30:00 (CST-6)
Location: MEMPHIS
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Rainfall of 2 to 3 inches fell over a large part of the Wahoo Creek basin causing it to flood around the Ithaca area.  The Creek's stage at Ithaca crested just under 20 feet in the early evening hours of 5/20, flood stage is 19 feet.  The flooding closed a few county roads and flooded farmland along the river.  The fairgrounds on the southeast side of Wahoo also flooded.

Flood in SAUNDERS, NEBRASKA
From 20-MAY-11 08:30:00 to 20-MAY-11 16:50:00 (CST-6)
Location: WAHOO
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rainfall of 2 inches or more fell near and west of Wahoo with a little less than that reported east of town.  Prague reported 2.84 inches of rain over the 24 hour period ending 7am CDT 5/20.  The heavy rain produced flooding along Sand Creek or Cottonwood Creek which flooded across Highway 77/92 east of Wahoo prompting its closure for several hours.