This was the last of five significant severe hail events this month, in terms of size and the number of reports. Each of these events contained at least one report of 2 inch hail or greater. The uniqueness of this event was that it occurred during the morning hours on this Friday. Around 5 a.m. CST, scattered showers began to develop across much of south central Nebraska. Over the following couple hours, they increased in coverage and strengthened into thunderstorms. By 7:30 a.m. CST, several strong to severe storms were along and north of Interstate 80 from Lexington to Grand Island to Osceola. A couple of them became supercells. One supercell in particular produced most of the hail as it tracked from northern Adams County into southern Hamilton and York counties. Tennis ball to baseball size hail occurred near from near Hansen to Giltner to Trumbull. By 10 a.m. CST, it was all over. The storms hail had exited into eastern Nebraska.
South central Nebraska was in the cold sector. A cold front extended from the Great Lakes southwest across Kansas. High pressure was over the Northern Plains, while a low pressure center was making its way along the front over Kansas. In the upper-levels, a broad trough extended from the Northern Rockies into the Northern Plains. A fairly potent shortwave trough was embedded within this cyclonic flow, just west of the region, and extended from Montana into Wyoming. These storms formed in an area of mid-level warm air advection around 700 mb and frontogenesis between 850 mb and 700 mb. Meanwhile, under the frontal surface, cold air advection was occurring with surface temperatures in the 50s. MUCAPE was between 500 and 1000 J/kg, and deep layer shear was around 40 knots.

Hail in ADAMS, NEBRASKA
From 18-SEP-15 07:33:00 to 18-SEP-15 07:33:00 (CST-6)
Location: HASTINGS
Magnitude: 1.50 
Property damage: 25.00K
Crop damage: 250.00K
Reported by: Trained Spotter

Hail in ADAMS, NEBRASKA
From 18-SEP-15 07:35:00 to 18-SEP-15 07:35:00 (CST-6)
Location: HASTINGS
Magnitude: 1.25 
Property damage: 25.00K
Crop damage: 250.00K
Reported by: Broadcast Media

Hail in ADAMS, NEBRASKA
From 18-SEP-15 07:42:00 to 18-SEP-15 07:42:00 (CST-6)
Location: (HSI)HASTINGS ARPT
Magnitude: 2.00 
Property damage: 25.00K
Crop damage: 250.00K
Reported by: NWS Employee

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 07:45:00 to 18-SEP-15 07:45:00 (CST-6)
Location: GILTNER
Magnitude: 2.75 
Property damage: 100.00K
Crop damage: 500.00K
Reported by: Public

Hail in KEARNEY, NEBRASKA
From 18-SEP-15 07:46:00 to 18-SEP-15 07:46:00 (CST-6)
Location: HEARTWELL
Magnitude: 1.25 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in ADAMS, NEBRASKA
From 18-SEP-15 07:47:00 to 18-SEP-15 07:47:00 (CST-6)
Location: HASTINGS
Magnitude: 2.75 
Property damage: 100.00K
Crop damage: 1.00M
Reported by: Social Media

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 07:51:00 to 18-SEP-15 07:51:00 (CST-6)
Location: GILTNER
Magnitude: 1.75 
Property damage: 35.00K
Crop damage: 400.00K
Reported by: Emergency Manager

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 07:53:00 to 18-SEP-15 07:53:00 (CST-6)
Location: GILTNER
Magnitude: 2.00 
Property damage: 35.00K
Crop damage: 400.00K
Reported by: Emergency Manager

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 07:58:00 to 18-SEP-15 07:58:00 (CST-6)
Location: GILTNER
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 250.00K
Reported by: Trained Spotter

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 07:58:00 to 18-SEP-15 08:02:00 (CST-6)
Location: GILTNER
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 250.00K
Reported by: Trained Spotter

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 08:41:00 to 18-SEP-15 08:41:00 (CST-6)
Location: GILTNER
Magnitude: 1.50 
Property damage: 15.00K
Crop damage: 250.00K
Reported by: Trained Spotter

Hail in YORK, NEBRASKA
From 18-SEP-15 09:35:00 to 18-SEP-15 09:35:00 (CST-6)
Location: WACO
Magnitude: 1.50 
Property damage: 15.00K
Crop damage: 250.00K
Reported by: Social Media

Hail in YORK, NEBRASKA
From 18-SEP-15 09:34:00 to 18-SEP-15 09:34:00 (CST-6)
Location: WACO
Magnitude: 1.50 
Property damage: 15.00K
Crop damage: 250.00K
Reported by: Trained Spotter

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 08:52:00 to 18-SEP-15 08:52:00 (CST-6)
Location: AURORA
Magnitude: 1.25 
Property damage: 15.00K
Crop damage: 250.00K
Reported by: Public

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 07:26:00 to 18-SEP-15 07:26:00 (CST-6)
Location: MARQUETTE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 08:00:00 to 18-SEP-15 08:00:00 (CST-6)
Location: GILTNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 08:20:00 to 18-SEP-15 08:30:00 (CST-6)
Location: STOCKHAM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HALL, NEBRASKA
From 18-SEP-15 08:22:00 to 18-SEP-15 08:24:00 (CST-6)
Location: DONIPHAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in HAMILTON, NEBRASKA
From 18-SEP-15 08:33:00 to 18-SEP-15 08:33:00 (CST-6)
Location: GILTNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in YORK, NEBRASKA
From 18-SEP-15 08:45:00 to 18-SEP-15 08:45:00 (CST-6)
Location: YORK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ADAMS, NEBRASKA
From 18-SEP-15 07:54:00 to 18-SEP-15 07:54:00 (CST-6)
Location: KENESAW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media