The severe weather that occurred across South Central Nebraska, this Wednesday evening, was produced by a lone supercell storm that tracked east-northeast across Dawson, Buffalo, Sherman, Howard, and Greeley counties. The core of the storm entered southwestern Dawson county just after 7 p.m. CDT. The storm produced hail up to the size of baseballs in Lexington, as well as a funnel cloud 4 miles south of the city. Wind damage was also reported nearby. As the storm tracked into less populated areas, it continue to produce hail up to the size of golf balls. Another funnel cloud occurred 6 miles north of Amherst in Buffalo county. Significant wind damage occurred near the town of Hazard, with a pole barn destroyed, several utility poles snapped off and debris transported from southwest to northeast. The storm gradually weakened as it moved into Howard and Greeley counties. However, it still downed several trees as far east as Elba before its rapid demise thereafter.
The synoptic situation was complex. A quasi-stationary front extended from the Ohio Valley westward to low pressure near Sioux Falls, Iowa, then southwestward across Nebraska, Kansas, and Colorado. A new cold front was moving in and attempting to merge with the stationary front near the time this storm developed. At the upper-levels, a deep trough was over the western U.S. with a ridge over the east. MLCAPE was around 1500 J/kg and deep layer shear was near 60 knots, creating a favorable environment for the supercell.

Thunderstorm Wind in DAWSON, NEBRASKA
From 07-MAY-14 19:00:00 to 07-MAY-14 19:05:00 (CST-6)
Location: LEXINGTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be near 70 MPH. Reports from the area included damage to an irrigation well engine shed and a power pole knocked down approximately 1 mile east of Lexington and one mile north of Interstate 80. A large cottonwood tree was also knocked down east of Lexington.

Hail in SHERMAN, NEBRASKA
From 07-MAY-14 20:05:00 to 07-MAY-14 20:05:00 (CST-6)
Location: ASHTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DAWSON, NEBRASKA
From 07-MAY-14 18:45:00 to 07-MAY-14 18:45:00 (CST-6)
Location: DARR
Magnitude: 1.50 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was reported at the intersection of Roads 755 and 422.

Hail in GOSPER, NEBRASKA
From 07-MAY-14 18:48:00 to 07-MAY-14 18:48:00 (CST-6)
Location: JOHNSON RES
Magnitude: 2.50 
Property damage: 250.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Ping pong to tennis ball size hail was reported at the northwest corner of Johnson Lake.

Hail in DAWSON, NEBRASKA
From 07-MAY-14 18:49:00 to 07-MAY-14 19:05:00 (CST-6)
Location: LEXINGTON
Magnitude: 2.75 
Property damage: 2.00M
Crop damage: 0.00K
Reported by: Trained Spotter

Hail ranging in size from quarters to baseballs was reported in town by trained spotters and law enforcement officials.

Hail in BUFFALO, NEBRASKA
From 07-MAY-14 19:25:00 to 07-MAY-14 19:30:00 (CST-6)
Location: MILLER
Magnitude: 1.75 
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter to golf ball size hail was reported in town.

Thunderstorm Wind in SHERMAN, NEBRASKA
From 07-MAY-14 19:53:00 to 07-MAY-14 19:53:00 (CST-6)
Location: HAZARD
Magnitude: 70.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Wind gusts estimated near 80 MPH resulted in a house suffering window damage from flying debris, with a children outdoor playhouse being flipped on its side. Several large trees were dragged across the owner's property. A pole barn was also destroyed, with 6x6 poles snapped and debris spread from southwest to northeast across the property.

Thunderstorm Wind in SHERMAN, NEBRASKA
From 07-MAY-14 20:02:00 to 07-MAY-14 20:02:00 (CST-6)
Location: ROCKVILLE
Magnitude: 70.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Wind gusts estimated near 80 MPH resulted in garage door and siding damage at a home.

Thunderstorm Wind in HOWARD, NEBRASKA
From 07-MAY-14 20:25:00 to 07-MAY-14 20:25:00 (CST-6)
Location: ELBA
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tree damage, with some power outages, was reported in Elba.