An initially unimpressive thunderstorm complex over northeast Nebraska rapidly intensified during the morning of August 10, 2020. After a few sporadic early morning damage reports, the intensifying storms began to more readily produce damaging winds in excess of 50 kts around 1340Z. Those damaging winds increased in coverage and intensity as the storms moved east into Iowa. The portion of the thunderstorm complex that moved through the NWS Omaha forecast area marked the approximate beginning of an intense derecho that tracked across portions of Iowa, Illinois, Wisconsin, Indiana, Michigan, and Ohio. Within the NWS Omaha forecast area, there were more than 20 local storm reports of wind damage and measured severe wind gusts, including more than 50,000 power outages.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 10-AUG-20 08:03:00 to 10-AUG-20 08:03:00 (CST-6)
Location: OMAHA MILLARD ARPT
Magnitude: 56.00 MG
Reported by: Public

Public personal weather station measured a wind of 54 knots.

Thunderstorm Wind in SARPY, NEBRASKA
From 10-AUG-20 08:05:00 to 10-AUG-20 08:05:00 (CST-6)
Location: GRETNA
Magnitude: 52.00 EG
Reported by: Trained Spotter

Former NWS Employee called in estimating winds at 60 mph.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 10-AUG-20 08:09:00 to 10-AUG-20 08:09:00 (CST-6)
Location: (3NO)NORTH OMAHA ARP
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public called in with reports of large tree branched, up to 10 inches in diameter, broken from winds.

Thunderstorm Wind in LANCASTER, NEBRASKA
From 10-AUG-20 08:11:00 to 10-AUG-20 08:11:00 (CST-6)
Location: (LNK)LINCOLN ARPT
Magnitude: 54.00 MG
Reported by: ASOS

Lincoln Airport ASOS measured a wind gust of 54 kts.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 10-AUG-20 07:57:00 to 10-AUG-20 07:57:00 (CST-6)
Location: (OVN)WSFO OMAHA
Magnitude: 67.00 MG
Reported by: Public

Public personal weather station measured a wind of 67 knots.

Thunderstorm Wind in SARPY, NEBRASKA
From 10-AUG-20 08:15:00 to 10-AUG-20 08:15:00 (CST-6)
Location: (OFF)OFFUTT AFB
Magnitude: 56.00 EG
Reported by: Emergency Manager

Emergency management reported tress and power lines down in Bellevue, La Vista, and Papillion. Some homes were damaged by trees.

Thunderstorm Wind in BURT, NEBRASKA
From 10-AUG-20 07:39:00 to 10-AUG-20 07:39:00 (CST-6)
Location: CRAIG
Magnitude: 54.00 MG
Reported by: Public

Personal weather station measured a wind of 54 kts.

Thunderstorm Wind in BURT, NEBRASKA
From 10-AUG-20 07:39:00 to 10-AUG-20 07:39:00 (CST-6)
Location: CRAIG
Magnitude: 54.00 MG
Reported by: Mesonet

Public personal weather station measured a wind gust of 54 kts.

Thunderstorm Wind in THURSTON, NEBRASKA
From 10-AUG-20 07:06:00 to 10-AUG-20 07:06:00 (CST-6)
Location: PENDER
Magnitude: 52.00 EG
Reported by: Emergency Manager

Emergency Manager reported a large old tree blown down.

Thunderstorm Wind in THURSTON, NEBRASKA
From 10-AUG-20 07:14:00 to 10-AUG-20 07:14:00 (CST-6)
Location: WALTHILL
Magnitude: 52.00 EG
Reported by: Emergency Manager

Emergency manager reported a large tree down from wind.

Thunderstorm Wind in BURT, NEBRASKA
From 10-AUG-20 07:52:00 to 10-AUG-20 07:52:00 (CST-6)
Location: TEKAMAH ARPT
Magnitude: 59.00 MG
Reported by: ASOS

Tekamah ASOS measured a wind of 59 kts.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 10-AUG-20 08:06:00 to 10-AUG-20 08:06:00 (CST-6)
Location: (OMA)EPPLEY FLD OMAH
Magnitude: 58.00 MG
Reported by: ASOS

Omaha Eppley Airfield ASOS measured a wind gust of 58 kts.

Thunderstorm Wind in KNOX, NEBRASKA
From 10-AUG-20 05:10:00 to 10-AUG-20 05:10:00 (CST-6)
Location: NIOBRARA
Magnitude: 52.00 EG
Reported by: Public

Public reported a large tree down by the Missouri River near Niobrara, NE.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 10-AUG-20 08:20:00 to 10-AUG-20 08:20:00 (CST-6)
Location: OMAHA
Magnitude: 56.00 EG
Reported by: Utility Company

Omaha Public Power District reported crews responding to widespread power outages in Omaha due to straight line wind damage.