A cold front brought scattered thunderstorms, including a few severe thunderstorms with marginally severe wind gusts, to portions of south central Nebraska in the late evening hours of  July 13th. Thunderstorms initially developed along a cold front during the late afternoon hours from north central into southwest Nebraska. A segment of the broken line of thunderstorms strengthened over Lincoln County between 7pm and 9pm CDT, near North Platte, and accelerated eastward. This activity entered far western portions of the Hastings CWA around 9:30pm CDT, bringing marginally severe wind gusts to portions of Dawson and Gosper Counties. Additional severe thunderstorm warnings were issued further east to include all or portions of Phelps, Buffalo, and Kearney counties, but thunderstorms rapidly decreased in intensity between 10pm and 11pm CDT. In total, four severe wind reports were received with this initial activity. Several mesoscale convective vortices (MCVs) developed within the broader zone of convection as the cold front progressively shifted eastward across the Central Plains during the overnight hours. One such MCV strengthened over south central Nebraska such that a ���wake low��� developed on the backside of departing stratiform precipitation which produced strong to marginally severe wind gusts around the Hastings, NE vicinity between 1am and 2am CDT on July 14th. This prompted the issuance of a short fused High Wind Warning. However, the duration and coverage of severe winds caused by the wake low was relatively limited, as wind gusts east of Adams County remained just below severe levels in the 50-55 mph range.
Severe thunderstorm development on this day was supported by a cold front interacting with a warm, humid air mass and strong instability (MLCAPE of 3000-4000 J/kg). However, limited deep layer shear to around 30 knots or less along with warm mid level temperatures and increasing convective inhibition after sunset likely prevented thunderstorms from maintaining their intensity deep into the overnight hours.

Thunderstorm Wind in DAWSON, NEBRASKA
From 13-JUL-20 20:23:00 to 13-JUL-20 20:23:00 (CST-6)
Location: FARNAM
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 in Farnam.

Thunderstorm Wind in DAWSON, NEBRASKA
From 13-JUL-20 20:23:00 to 13-JUL-20 20:23:00 (CST-6)
Location: GOTHENBURG
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GOSPER, NEBRASKA
From 13-JUL-20 21:11:00 to 13-JUL-20 21:11:00 (CST-6)
Location: JOHNSON RES
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in DAWSON, NEBRASKA
From 13-JUL-20 21:15:00 to 13-JUL-20 21:15:00 (CST-6)
Location: LEXINGTON ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

High Wind in ADAMS, NEBRASKA
From 14-JUL-20 01:31:00 to 14-JUL-20 01:31:00 (CST-6)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 58 MPH was measured by a mesonet station located 1 mile southwest of Roseland. This wind gust was caused by a wake low which occurred well behind a line of thunderstorms.

High Wind in ADAMS, NEBRASKA
From 14-JUL-20 01:42:00 to 14-JUL-20 01:42:00 (CST-6)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 59 MPH was measured by a mesonet station located 3 miles east-southeast of Juniata. This wind gust was caused by a wake low which occurred well behind a line of thunderstorms.