Thunderstorms developed in two areas of eastern Nebraska on the afternoon of May 3rd. The first and most intense developed near Lincoln at the intersection of a surface trough and a thermal boundary, which was the result of earlier day weaker thunderstorms. Although moisture and thus instability were limited, favorable shear and boundary interaction allowed for a couple of supercells to track southeast across southeast Nebraska producing significant hail and one weak tornado. The other area of thunderstorm development was across northeast Nebraska associated with a cold front. This area had limited instability as well, but also weaker shear than farther south and resulted in less intense storms. The threat of severe weather generally ended shortly after midnight as the storms weakened.

Hail in LANCASTER, NEBRASKA
From 03-MAY-15 19:04:00 to 03-MAY-15 19:04:00 (CST-6)
Location: JAMAICA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in THURSTON, NEBRASKA
From 03-MAY-15 19:18:00 to 03-MAY-15 19:18:00 (CST-6)
Location: WALTHILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JOHNSON, NEBRASKA
From 03-MAY-15 19:20:00 to 03-MAY-15 19:32:00 (CST-6)
Location: COOK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in GAGE, NEBRASKA
From 03-MAY-15 19:45:00 to 03-MAY-15 19:45:00 (CST-6)
Location: ADAMS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in NEMAHA, NEBRASKA
From 03-MAY-15 20:00:00 to 03-MAY-15 20:16:00 (CST-6)
Location: JOHNSON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail lasted for several minutes in the city of Johnson and ranged from 1 inch to 1.50 inches in diameter.

Hail in THURSTON, NEBRASKA
From 03-MAY-15 20:03:00 to 03-MAY-15 20:08:00 (CST-6)
Location: WINNEBAGO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JOHNSON, NEBRASKA
From 03-MAY-15 20:05:00 to 03-MAY-15 20:09:00 (CST-6)
Location: STERLING
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado in LANCASTER, NEBRASKA
From 03-MAY-15 19:33:00 to 03-MAY-15 19:35:00 (CST-6)
Location: FIRTH
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reports, as well as video, indicated a brief tornado occurred from the supercell in southern Lancaster County. No damage was reported from the tornado, and video indicated that the tornado was brief.

Hail in NEMAHA, NEBRASKA
From 03-MAY-15 20:11:00 to 03-MAY-15 20:11:00 (CST-6)
Location: JOHNSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JOHNSON, NEBRASKA
From 03-MAY-15 20:40:00 to 03-MAY-15 20:45:00 (CST-6)
Location: TECUMSEH
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail from 1 inch to 1.25 inches in diameter was reported by both the public and an COOP Observer.

Hail in SAUNDERS, NEBRASKA
From 03-MAY-15 22:35:00 to 03-MAY-15 22:35:00 (CST-6)
Location: ASHLAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LANCASTER, NEBRASKA
From 03-MAY-15 17:10:00 to 03-MAY-15 17:10:00 (CST-6)
Location: ROCA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LANCASTER, NEBRASKA
From 03-MAY-15 16:57:00 to 03-MAY-15 16:57:00 (CST-6)
Location: HANLON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LANCASTER, NEBRASKA
From 03-MAY-15 17:35:00 to 03-MAY-15 17:35:00 (CST-6)
Location: PANAMA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GAGE, NEBRASKA
From 03-MAY-15 17:52:00 to 03-MAY-15 17:52:00 (CST-6)
Location: ADAMS
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in LANCASTER, NEBRASKA
From 03-MAY-15 17:52:00 to 03-MAY-15 17:52:00 (CST-6)
Location: WEST LINCOLN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was falling near Memorial Stadium.

Hail in JOHNSON, NEBRASKA
From 03-MAY-15 18:15:00 to 03-MAY-15 18:15:00 (CST-6)
Location: STERLING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LANCASTER, NEBRASKA
From 03-MAY-15 18:41:00 to 03-MAY-15 18:41:00 (CST-6)
Location: ROKEBY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JOHNSON, NEBRASKA
From 03-MAY-15 18:33:00 to 03-MAY-15 18:33:00 (CST-6)
Location: STERLING
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CUMING, NEBRASKA
From 03-MAY-15 18:45:00 to 03-MAY-15 18:45:00 (CST-6)
Location: BEEMER
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSON, NEBRASKA
From 03-MAY-15 18:26:00 to 03-MAY-15 18:37:00 (CST-6)
Location: STERLING
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail ranged in size at different times from penny size to as large as 2 inches in diameter.

Hail in OTOE, NEBRASKA
From 03-MAY-15 17:50:00 to 03-MAY-15 17:50:00 (CST-6)
Location: DOUGLAS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter