A large upper-level storm system slow moved across eastern Nebraska and western Iowa during the afternoon on April 27th. As this occurred a occluded cold front slowly moved through the region, as a warm front lifted into southeast Nebraska and southwest Iowa. Although surface temperatures only warmed into the upper 50s to mid 60s, very cold temperatures above the surface created instability across the region. Thunderstorms developed by mid afternoon along the two fronts and isolated to scattered reports of severe weather were received, mainly in the form of large hail and damaging winds. Two thunderstorms became tornadic though during the late afternoon as they interacted with the warm front, with one of these producing a small tornado in west Omaha. In addition, the slow moving nature of the storms also led to areas of heavy rainfall and flash flooding.

Hail in SAUNDERS, NEBRASKA
From 27-APR-16 12:50:00 to 27-APR-16 12:50:00 (CST-6)
Location: CEDAR BLUFFS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CASS, NEBRASKA
From 27-APR-16 13:18:00 to 27-APR-16 13:18:00 (CST-6)
Location: CEDAR CREEK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, NEBRASKA
From 27-APR-16 13:47:00 to 27-APR-16 13:47:00 (CST-6)
Location: VALLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SARPY, NEBRASKA
From 27-APR-16 14:06:00 to 27-APR-16 14:06:00 (CST-6)
Location: RICHFIELD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CASS, NEBRASKA
From 27-APR-16 14:11:00 to 27-APR-16 14:11:00 (CST-6)
Location: PLATTSMOUTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, NEBRASKA
From 27-APR-16 14:15:00 to 27-APR-16 14:15:00 (CST-6)
Location: VALLEY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in DOUGLAS, NEBRASKA
From 27-APR-16 13:39:00 to 27-APR-16 13:44:00 (CST-6)
Location: VALLEY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Hail fell at the National Weather Service office.

Hail in DOUGLAS, NEBRASKA
From 27-APR-16 14:08:00 to 27-APR-16 14:08:00 (CST-6)
Location: MILLARD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, NEBRASKA
From 27-APR-16 13:48:00 to 27-APR-16 13:48:00 (CST-6)
Location: VALLEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in WASHINGTON, NEBRASKA
From 27-APR-16 14:31:00 to 27-APR-16 14:31:00 (CST-6)
Location: ARLINGTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in CASS, NEBRASKA
From 27-APR-16 14:06:00 to 27-APR-16 14:06:00 (CST-6)
Location: PLATTSMOUTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The broadcast media reported winds to near 60 mph.

Thunderstorm Wind in SARPY, NEBRASKA
From 27-APR-16 14:45:00 to 27-APR-16 14:45:00 (CST-6)
Location: AVERY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The gusts were estimated up to 60 mph.

Tornado in DOUGLAS, NEBRASKA
From 27-APR-16 14:43:00 to 27-APR-16 14:47:00 (CST-6)
Location: BOYS TOWN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado started on 132nd Street and traveled north northeast crossing Blondo Street just east of 132nd Street where EF1 damage occurred due to a tree being uprooted. Other tree and fence damage was noted along this section of path. After crossing Blondo Street the tornado turned more north northwest crossing 132nd Street a Ekskine Street. The tornado continued north into the South Ridge subdivision producing mainly try damage before dissipating just before the Eagle Run subdivision.

Tornado in DOUGLAS, NEBRASKA
From 27-APR-16 14:52:00 to 27-APR-16 14:53:00 (CST-6)
Location: BOYS TOWN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado touchdown was observed by storm chasers near the Alice Buffett Magnet Middle School. The storm survey team found little damage in the area.

Tornado in DOUGLAS, NEBRASKA
From 27-APR-16 14:53:00 to 27-APR-16 14:55:00 (CST-6)
Location: BENNINGTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down in a retention pond in the Waterford Subdivision. The tornado was observed by several storm chasers in the area. The damage survey team found little damage in the area.

Tornado in SAUNDERS, NEBRASKA
From 27-APR-16 13:10:00 to 27-APR-16 13:11:00 (CST-6)
Location: CEDAR BLUFFS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management provided pictures of a very brief tornado touchdown in an open field. No damage was observed.

Flood in RICHARDSON, NEBRASKA
From 27-APR-16 13:37:00 to 29-APR-16 10:15:00 (CST-6)
Location: RULO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rain events on the 20th into the 21st created minor flooding on the Missouri River. The river crested 0.54 feet above flood stage at Rulo in southeast Nebraska.