Three distinct rounds of severe thunderstorms pounded parts of South Central Nebraska between the very early morning hours on the 21st, and sunrise on the 22nd, continuing a very active few days of severe weather. By and large, most of these storms affected areas near and south of Interstate 80. The first round flared up very early on the 21st, around midnight, reached peak intensity during the pre-dawn hours, and was largely out of the area by sunrise. This cluster of storms formed to the north of a nearly stationary east-west surface front stretched across Northern Kansas, within the nose of a 40-50 knot low level jet. The synoptic environment also featured at least 40 knots of deep layer shear, and MUCAPE values of 2000-3000 J/kg. For being so early in the morning, these storms were efficient damaging wind-producers near the Highway 6 corridor, with gusts to at least 70 MPH reported in parts of Phelps, Kearney and Adams Counties. In addition to damaging winds, there were also a few reports of hail, with hail up to golf ball size reported in Kearney County.
Following a break in the action that lasted most of the day and into the evening hours, another complex of severe thunderstorms started pushing into western sections of South Central Nebraska shortly after sunset, rolling through areas near and south of Interstate 80 during the next several hours, and lasting into the early morning hours on the 22nd. The synoptic situation was very similar to the first round of storms, with the same, quasi-stationary surface front hanging across Northern Kansas, 2000-3000 J/kg MUCAPE, and the nose of a 30-40 knot low level jet focused into the area. In similar fashion, these storms were primarily damaging wind-producers, with a corridor of reports of 60-75 MPH wind and associated damage centered from Harlan and Franklin Counties, east-northeast into Hamilton and Fillmore Counties. This round of storms largely exited South Central Nebraska by 2 am on the 22nd.
Finally, yet another complex of strong to severe storms flared up during the pre-dawn hours on the 22nd within the persistent warm-air advection regime, with a report of 60 MPH winds near Doniphan in Hall County shortly after sunrise.

Thunderstorm Wind in PHELPS, NEBRASKA
From 21-JUN-10 02:58:00 to 21-JUN-10 02:58:00 (CST-6)
Location: SACRAMENTO
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PHELPS, NEBRASKA
From 21-JUN-10 02:59:00 to 21-JUN-10 02:59:00 (CST-6)
Location: SACRAMENTO
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KEARNEY, NEBRASKA
From 21-JUN-10 03:01:00 to 21-JUN-10 03:01:00 (CST-6)
Location: AXTELL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KEARNEY, NEBRASKA
From 21-JUN-10 03:22:00 to 21-JUN-10 03:22:00 (CST-6)
Location: MINDEN
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated at 75 mph.

Hail in KEARNEY, NEBRASKA
From 21-JUN-10 03:24:00 to 21-JUN-10 03:24:00 (CST-6)
Location: MINDEN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KEARNEY, NEBRASKA
From 21-JUN-10 03:29:00 to 21-JUN-10 03:29:00 (CST-6)
Location: HEARTWELL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated at 60 mph.

Thunderstorm Wind in CLAY, NEBRASKA
From 21-JUN-10 04:09:00 to 21-JUN-10 04:09:00 (CST-6)
Location: GLENVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated at 60 mph.

Thunderstorm Wind in NUCKOLLS, NEBRASKA
From 21-JUN-10 04:25:00 to 21-JUN-10 04:25:00 (CST-6)
Location: NELSON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated at 60 mph.

Thunderstorm Wind in THAYER, NEBRASKA
From 21-JUN-10 04:45:00 to 21-JUN-10 04:45:00 (CST-6)
Location: DESHLER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated at 60 mph.

Thunderstorm Wind in HARLAN, NEBRASKA
From 21-JUN-10 22:15:00 to 21-JUN-10 22:15:00 (CST-6)
Location: ORLEANS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated at 60 mph.

Thunderstorm Wind in HARLAN, NEBRASKA
From 21-JUN-10 22:25:00 to 21-JUN-10 22:25:00 (CST-6)
Location: ORLEANS
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in FRANKLIN, NEBRASKA
From 21-JUN-10 23:19:00 to 21-JUN-10 23:19:00 (CST-6)
Location: CAMPBELL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated at 60 mph.

Thunderstorm Wind in ADAMS, NEBRASKA
From 22-JUN-10 00:00:00 to 22-JUN-10 00:00:00 (CST-6)
Location: HASTINGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts estimated at 60 mph.

Hail in CLAY, NEBRASKA
From 22-JUN-10 00:15:00 to 22-JUN-10 00:15:00 (CST-6)
Location: CLAY CENTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in HAMILTON, NEBRASKA
From 22-JUN-10 00:15:00 to 22-JUN-10 00:20:00 (CST-6)
Location: HAMPTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs ranging from 8 to 12 inches in diameter were blown down.

Thunderstorm Wind in ADAMS, NEBRASKA
From 21-JUN-10 03:34:00 to 21-JUN-10 03:34:00 (CST-6)
Location: HOLSTEIN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

One pivot was overturned.

Thunderstorm Wind in HAMILTON, NEBRASKA
From 22-JUN-10 00:15:00 to 22-JUN-10 00:15:00 (CST-6)
Location: GILTNER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated at 60 mph.  Large tree was blown down in city park.

Thunderstorm Wind in HAMILTON, NEBRASKA
From 22-JUN-10 00:17:00 to 22-JUN-10 00:17:00 (CST-6)
Location: GILTNER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated at 70 mph.

Thunderstorm Wind in HAMILTON, NEBRASKA
From 22-JUN-10 00:30:00 to 22-JUN-10 00:30:00 (CST-6)
Location: AURORA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Reports from the area included tree and barn damage as well as one overturned pivot.

Thunderstorm Wind in FILLMORE, NEBRASKA
From 22-JUN-10 00:32:00 to 22-JUN-10 00:32:00 (CST-6)
Location: GENEVA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tree damage was reported and a few power lines were blown down.

Thunderstorm Wind in HAMILTON, NEBRASKA
From 22-JUN-10 00:50:00 to 22-JUN-10 00:50:00 (CST-6)
Location: AURORA MUNI ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in HALL, NEBRASKA
From 22-JUN-10 05:35:00 to 22-JUN-10 05:35:00 (CST-6)
Location: DONIPHAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts estimated at 60 mph.

Thunderstorm Wind in FILLMORE, NEBRASKA
From 22-JUN-10 00:28:00 to 22-JUN-10 00:28:00 (CST-6)
Location: SHICKLEY
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in ADAMS, NEBRASKA
From 21-JUN-10 03:55:00 to 21-JUN-10 03:55:00 (CST-6)
Location: (HSI)HASTINGS ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter