Severe thunderstorms developed ahead of a cold front moving slowly southeast across eastern Nebraska and western Iowa.  Supercell thunderstorms produced hail as large as 4 inches in diameter in Butler County, and thunderstorm winds as high 80 mph near Wymore,NE.  A tornado briefly touched down near Odell in Gage County.  Heavy rainfall in some of the storms caused water to go over roads in Butler County and Burt County.

Thunderstorm Wind in BURT, NEBRASKA
From 01-MAY-18 17:05:00 to 01-MAY-18 17:05:00 (CST-6)
Location: TEKAMAH ARPT
Magnitude: 59.00 MG
Reported by: ASOS

The ASOS weather station at Tekamah Airport measured a 68 mph wind gust.

Thunderstorm Wind in GAGE, NEBRASKA
From 01-MAY-18 18:29:00 to 01-MAY-18 18:29:00 (CST-6)
Location: BLUE SPGS
Magnitude: 70.00 MG
Reported by: Emergency Manager

A weather station measured an 81 mph wind gust southwest of Blue Springs.

Flash Flood in BURT, NEBRASKA
From 01-MAY-18 19:30:00 to 01-MAY-18 22:00:00 (CST-6)
Location: CRAIG
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 2.00K
Reported by: Law Enforcement

Water was reported over County Roads near Craig. Between 2 1/2 and 4 inches of rain fell from thunderstorms across Burt County.

Flood in BUTLER, NEBRASKA
From 01-MAY-18 17:30:00 to 01-MAY-18 22:00:00 (CST-6)
Location: BELLWOOD
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 3.00K
Reported by: Emergency Manager

Between 1 1/2 to 2 inches of heavy rain fell across northern Butler County.This caused water in a low lying area near the the Platte River to overflow across County Road 44 between County Roads E and F.

Thunderstorm Wind in JEFFERSON, NEBRASKA
From 01-MAY-18 17:30:00 to 01-MAY-18 17:30:00 (CST-6)
Location: THOMPSON
Magnitude: 61.00 EG
Reported by: Emergency Manager

A tree was reported down across a road 5 miles east of Reynolds.

Tornado in GAGE, NEBRASKA
From 01-MAY-18 18:23:00 to 01-MAY-18 18:25:00 (CST-6)
Location: KRIDER
Tornado F-scale: EF0
Reported by: Trained Spotter

A spotter reported a tornado briefly touched down and lifted.

Funnel Cloud in BUTLER, NEBRASKA
From 01-MAY-18 15:58:00 to 01-MAY-18 15:58:00 (CST-6)
Location: ABIE
Reported by: Emergency Manager

A funnel cloud was reported by the Butler County emergency manager.

Hail in COLFAX, NEBRASKA
From 01-MAY-18 15:00:00 to 01-MAY-18 15:00:00 (CST-6)
Location: CLARKSON
Magnitude: 1.00 
Reported by: Public

One inch hail was reported 6 miles south of Clarkson.

Hail in COLFAX, NEBRASKA
From 01-MAY-18 15:29:00 to 01-MAY-18 15:29:00 (CST-6)
Location: HOWELLS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Quarter size hail was reported about 4 1/2 miles southwest of Howells.

Hail in BUTLER, NEBRASKA
From 01-MAY-18 15:48:00 to 01-MAY-18 15:48:00 (CST-6)
Location: OCTAVIA
Magnitude: 4.00 
Reported by: Public

Grapefruit size hail was reported 1 mile west of Octavia.

Hail in BUTLER, NEBRASKA
From 01-MAY-18 15:48:00 to 01-MAY-18 15:48:00 (CST-6)
Location: OCTAVIA
Magnitude: 2.75 
Reported by: Emergency Manager

Baseball size hail was reported by the Butler County Emergency Manager 2 miles west of Octavia.

Hail in BUTLER, NEBRASKA
From 01-MAY-18 15:51:00 to 01-MAY-18 15:51:00 (CST-6)
Location: BELLWOOD
Magnitude: 2.00 
Reported by: Public

Hail in BUTLER, NEBRASKA
From 01-MAY-18 15:51:00 to 01-MAY-18 15:51:00 (CST-6)
Location: OCTAVIA
Magnitude: 1.75 
Reported by: Emergency Manager

There was a report of a large amount of golfball size hail.

Hail in BUTLER, NEBRASKA
From 01-MAY-18 15:59:00 to 01-MAY-18 15:59:00 (CST-6)
Location: ABIE
Magnitude: 2.00 
Reported by: Public

Hail in BUTLER, NEBRASKA
From 01-MAY-18 16:00:00 to 01-MAY-18 16:00:00 (CST-6)
Location: LINWOOD
Magnitude: 1.75 
Reported by: Emergency Manager

Hail in BUTLER, NEBRASKA
From 01-MAY-18 16:16:00 to 01-MAY-18 16:16:00 (CST-6)
Location: LINWOOD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DODGE, NEBRASKA
From 01-MAY-18 16:27:00 to 01-MAY-18 16:27:00 (CST-6)
Location: NORTH BEND
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in DODGE, NEBRASKA
From 01-MAY-18 16:39:00 to 01-MAY-18 16:39:00 (CST-6)
Location: BAY STATE
Magnitude: 1.00 
Reported by: Public

Hail in BURT, NEBRASKA
From 01-MAY-18 16:42:00 to 01-MAY-18 16:42:00 (CST-6)
Location: CRAIG
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DODGE, NEBRASKA
From 01-MAY-18 17:01:00 to 01-MAY-18 17:01:00 (CST-6)
Location: AMES
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in JEFFERSON, NEBRASKA
From 01-MAY-18 17:41:00 to 01-MAY-18 17:41:00 (CST-6)
Location: FAIRBURY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, NEBRASKA
From 01-MAY-18 17:48:00 to 01-MAY-18 17:48:00 (CST-6)
Location: THOMPSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, NEBRASKA
From 01-MAY-18 18:10:00 to 01-MAY-18 18:10:00 (CST-6)
Location: DILLER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CEDAR, NEBRASKA
From 01-MAY-18 18:29:00 to 01-MAY-18 18:29:00 (CST-6)
Location: FORDYCE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GAGE, NEBRASKA
From 01-MAY-18 18:29:00 to 01-MAY-18 18:29:00 (CST-6)
Location: BLUE SPGS
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in BURT, NEBRASKA
From 01-MAY-18 16:42:00 to 01-MAY-18 16:42:00 (CST-6)
Location: CRAIG
Magnitude: 52.00 EG
Reported by: Public

A 60 mph wind gust was estimated southwest of Craig.