Hail at least the size of tennis balls fell over Thayer County on this Labor Day Monday. Scattered elevated showers, and a few embedded, weak thunderstorms, progressed through south central Nebraska during the morning and afternoon hours. Much of the area was cloudy through early afternoon, as low stratus lingered from the nighttime hours. Between noon and 1 p.m. CST, the southernmost thunderstorm emerged into Webster County. This storm rapidly intensified and became an isolated, classic supercell as it emerged from an area of cloudiness into sunshine and moved crossed Nuckolls and Thayer Counties. This area was the only portion of south central Nebraska that had seen prolonged sunshine. This storm produced very large hail over Thayer County, and those reports were on the fringe of the most intense core. Given the impressive radar signatures, hail larger than tennis balls may have fallen from west-to-east across central Thayer County. However, the core tracked just north of Highway 136, where population is extremely low. As the storm skirted to the north of Hebron, some wind damage occurred associated with the rear flank downdraft. This storm occurred early in the afternoon and exited Thayer county by 230 p.m. CST. Between 4 and 9 p.m. CST, other storms developed over south central Nebraska. While most were not severe, one storm that developed over Adams County produced hail up to the size of golf balls in Hastings.
South central Nebraska was behind a weak cold front that had moved through Sunday. As the day progressed, this front appeared to lift north back into Nebraska, as differential heating occurred between the cloudy and sunny areas. The equipment at the Hebron airport measured temperatures in the upper 80s and dewpoints in the lower 70s within the storm inflow. Combined with mid-level lapse rates between 7 and 7.5 deg C/km, the resulting MLCAPE was around 2000 J/kg. 0-3 km SRH was between 200 and 300 m2/s2, with deep layer shear 45 to 50 knots. Shear and instability were similar into the evening hours, even though temperatures had cooled into the middle 70s. In the upper-levels, a low was over the Canadian Prairies with a broad trough underneath over the Northern Rockies and Northern Plains. Nebraska was on the southern fringe of the Westerlies.

Thunderstorm Wind in THAYER, NEBRASKA
From 07-SEP-15 13:40:00 to 07-SEP-15 13:40:00 (CST-6)
Location: HEBRON
Magnitude: 56.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Social Media

Wind gusts estimated to be near 65 MPH resulted in tree damage in Hebron.

Thunderstorm Wind in THAYER, NEBRASKA
From 07-SEP-15 13:42:00 to 07-SEP-15 13:42:00 (CST-6)
Location: HEBRON
Magnitude: 56.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Wind gusts were estimated to be near 65 MPH.

Hail in THAYER, NEBRASKA
From 07-SEP-15 13:55:00 to 07-SEP-15 13:55:00 (CST-6)
Location: BELVIDERE
Magnitude: 2.00 
Property damage: 35.00K
Crop damage: 400.00K
Reported by: Social Media

Hail in THAYER, NEBRASKA
From 07-SEP-15 14:13:00 to 07-SEP-15 14:13:00 (CST-6)
Location: GILEAD
Magnitude: 2.50 
Property damage: 35.00K
Crop damage: 400.00K
Reported by: Social Media

This report was 2 miles east of Gilead. An error in the mapping program has plotted it almost 5 miles east-northeast.

Hail in ADAMS, NEBRASKA
From 07-SEP-15 20:05:00 to 07-SEP-15 20:05:00 (CST-6)
Location: HASTINGS
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 500.00K
Reported by: Public

Hail in NUCKOLLS, NEBRASKA
From 07-SEP-15 13:22:00 to 07-SEP-15 13:22:00 (CST-6)
Location: OAK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in THAYER, NEBRASKA
From 07-SEP-15 13:32:00 to 07-SEP-15 13:38:00 (CST-6)
Location: DAVENPORT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in THAYER, NEBRASKA
From 07-SEP-15 14:15:00 to 07-SEP-15 14:15:00 (CST-6)
Location: ALEXANDRIA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in FILLMORE, NEBRASKA
From 07-SEP-15 19:05:00 to 07-SEP-15 19:05:00 (CST-6)
Location: SHICKLEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ADAMS, NEBRASKA
From 07-SEP-15 20:08:00 to 07-SEP-15 20:08:00 (CST-6)
Location: HASTINGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee