Two rounds of severe weather affected portions of south central Nebraska and north central Kansas the evening of July 10th into the early morning hours of July 11th. For the first round, thunderstorms initially formed near the South Dakota and Nebraska border during the early afternoon hours, then shifted southeast into central Nebraska and eventually the northwest portions of the GID CWA during the late afternoon and early evening. Most of the severe reports were associated with an intense supercell on the southwestern flank of a line of thunderstorms. This supercell tracked from just south of Valentine to Broken Bow before it entered the local area in Buffalo and Sherman Counties around 5:30PM CDT. Multiple reports of 50-60mph wind gusts were received, along with 5 ft tall corn being blown over in northern Buffalo County. This thunderstorm continued southeast and impacted Kearney with 60-70mph winds, including a 61mph gust at the Kearney Airport. Additional severe wind reports, and even some quarter to half dollar size hail, occurred in Kearney County before the system weakened as it neared the state line during the late evening. These thunderstorms were supported by MLCAPE values of 2000-3000 J/kg, steep mid level lapse rates, and very strong effective shear of 50-60kt.
The next round of thunderstorms brought high winds to central and northern portions of the area between 11PM CDT on the 10th, and 1AM CDT on the 11th. This round of severe weather actually stemmed from thunderstorms that developed well northwest of the area, across southeast Montana and northeast Wyoming, during the afternoon hours of July 10th. Weakening had been noted around midnight as the leading edge shifted into the northwest CWA, likely impacted by the remnant cool, drier outflow from the first wave resulting in decreasing surface based instability and increasing inhibition. However, a mesohigh quickly developed over north central Nebraska, which resulted in a rapidly increasing low level pressure gradient force and strong pressure rises. In fact, pressure rises on the order of 8-9mb/2 hr were noted at both Ord and Grand Island ASOSs. The pressure rises allowed strong wind to develop, despite an overall weakening trend within the convection itself. Multiple reports of 55-65mph wind gusts occurred with this second round of activity, impacting areas from Ord to Hastings, including Grand Island, east to the York area. The strong winds resulted in numerous downed tree branches and power lines. The pressure gradient and wind gusts gradually relaxed after 1AM, and any additional gusts remained sub severe.
The next round of thunderstorms brought high winds to central and northern portions of the area between 11PM CDT on the 10th, and 1AM CDT on the 11th. This round of severe weather actually stemmed from thunderstorms that developed well northwest of the area, across southeast Montana and northeast Wyoming, during the afternoon hours of July 10th. Weakening had been noted around midnight as the leading edge shifted into the northwest CWA, likely impacted by the remnant cool, drier outflow from the first wave. However, a mesohigh quickly developed over north central Nebraska, which resulted in a rapidly increasing low level pressure gradient force and strong pressure rises. In fact, rises on the order of 8-9mb/2 hr were noted at both Ord and Grand Island ASOSs. The pressure rises allowed strong wind to develop, despite an overall weakening trend within the convection itself. Multiple reports of 55-65mph wind gusts occurred with this second round of activity, impacting areas from Ord to Hastings, including Grand Island, east to the York area. The strong winds resulted in numerous downed tree branches and power lines.

Thunderstorm Wind in BUFFALO, NEBRASKA
From 10-JUL-20 17:13:00 to 10-JUL-20 17:25:00 (CST-6)
Location: RIVERDALE
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wind gusts in and around Kearney were estimated to be in the 60 to 70 MPH range. Wind gusts of 61 MPH were recorded by the Kearney Regional Airport AWOS and a mesonet station located 2 miles north-northeast of Kearney. Small tree branches were downed around town, and a large tree limb knocked down power lines and snapped a power pole near the Buffalo County Fairgrounds. Some minor shingle damage was also reported on the northwest side of town.

Thunderstorm Wind in ADAMS, NEBRASKA
From 10-JUL-20 23:58:00 to 11-JUL-20 00:05:00 (CST-6)
Location: (HSI)HASTINGS ARPT
Magnitude: 54.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts between 60 and 65 MPH affected locations in and around Hastings, with a 62 MPH gusts recorded by the Hastings Airport ASOS at 12:58 AM CDT. Emergency management reported numerous large tree branches downed across town. One power pole was broken, causing a tree fire in the Hastings College area. A power line was knocked down over 3rd Street on the west side of town.

Thunderstorm Wind in BUFFALO, NEBRASKA
From 10-JUL-20 16:30:00 to 10-JUL-20 16:30:00 (CST-6)
Location: PLEASANTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be near 60 MPH.

Thunderstorm Wind in SHERMAN, NEBRASKA
From 10-JUL-20 16:35:00 to 10-JUL-20 16:35:00 (CST-6)
Location: LITCHFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be near 60 MPH.

Thunderstorm Wind in BUFFALO, NEBRASKA
From 10-JUL-20 16:52:00 to 10-JUL-20 16:52:00 (CST-6)
Location: RIVERDALE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be near 60 MPH.

Hail in BUFFALO, NEBRASKA
From 10-JUL-20 17:01:00 to 10-JUL-20 17:01:00 (CST-6)
Location: RIVERDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BUFFALO, NEBRASKA
From 10-JUL-20 17:01:00 to 10-JUL-20 17:01:00 (CST-6)
Location: RAVENNA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Wind gusts were estimated to be near 60 MPH.

Hail in BUFFALO, NEBRASKA
From 10-JUL-20 17:21:00 to 10-JUL-20 17:21:00 (CST-6)
Location: KEARNEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KEARNEY, NEBRASKA
From 10-JUL-20 17:28:00 to 10-JUL-20 17:28:00 (CST-6)
Location: NEWARK
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated to be near 65 MPH.

Thunderstorm Wind in KEARNEY, NEBRASKA
From 10-JUL-20 17:30:00 to 10-JUL-20 17:30:00 (CST-6)
Location: MINDEN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated to be near 60 MPH and were accompanied by pea to dime size hail.

Hail in KEARNEY, NEBRASKA
From 10-JUL-20 17:35:00 to 10-JUL-20 17:45:00 (CST-6)
Location: MINDEN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Quarter to ping pong ball size hail was reported.

Hail in KEARNEY, NEBRASKA
From 10-JUL-20 17:45:00 to 10-JUL-20 17:45:00 (CST-6)
Location: NORMAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Thunderstorm Wind in VALLEY, NEBRASKA
From 10-JUL-20 22:23:00 to 10-JUL-20 22:23:00 (CST-6)
Location: (ODX)SHARP FLD ORD
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in HALL, NEBRASKA
From 10-JUL-20 23:37:00 to 10-JUL-20 23:37:00 (CST-6)
Location: (GRI)GRAND IS RGNL A
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in HALL, NEBRASKA
From 10-JUL-20 23:42:00 to 10-JUL-20 23:42:00 (CST-6)
Location: WOOD RIVER
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in YORK, NEBRASKA
From 10-JUL-20 23:55:00 to 10-JUL-20 23:55:00 (CST-6)
Location: YORK ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in YORK, NEBRASKA
From 11-JUL-20 00:06:00 to 11-JUL-20 00:06:00 (CST-6)
Location: YORK
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public