Thunderstorms that developed over central Nebraska earlier that day pushed southeast across eastern Nebraska and southwest Iowa during the late afternoon and early evening hours of August 12th.  Despite a large scale upper ridge in place across the region, the storms became severe as they tapped a large pocket of instability over eastern Nebraska.  The storms developed a large cold pool and produced scattered areas of strong and damaging winds as several bow echoes moved across the area.
In addition, torrential rain occurred within the strongest part of the complex with near zero visibilities causing conditions to become like nightfall prompting street lights to come on.

Thunderstorm Wind in SARPY, NEBRASKA
From 12-AUG-07 16:15:00 to 12-AUG-07 16:15:00 (CST-6)
Location: PAPILLION
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts estimated at 60 mph blew down a tree blocking a local road near 121st and Fairview Road.

Thunderstorm Wind in PLATTE, NEBRASKA
From 12-AUG-07 14:35:00 to 12-AUG-07 14:35:00 (CST-6)
Location: HUMPHREY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds estimated at over 60 mph uprooted a few trees and caused other tree damage in the Humphrey area.

Thunderstorm Wind in DODGE, NEBRASKA
From 12-AUG-07 15:30:00 to 12-AUG-07 15:30:00 (CST-6)
Location: SNYDER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds estimated at 60 to 70 mph flattened corn near Snyder.

Flash Flood in CUMING, NEBRASKA
From 12-AUG-07 15:50:00 to 12-AUG-07 16:50:00 (CST-6)
Location: WEST PT
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Employee

Rainfall of 1 to 2 inches in less than 1 hour caused water 2 to 3 feet deep to run across highway 275 toward the south end of West Point. The water ran down hill from the east toward the west across the road.  Traffic flow was temporarily stopped and the flooding lasted between 30 minutes and 1 hour.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 12-AUG-07 16:22:00 to 12-AUG-07 16:22:00 (CST-6)
Location: YUTAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in DODGE, NEBRASKA
From 12-AUG-07 15:25:00 to 12-AUG-07 15:25:00 (CST-6)
Location: DODGE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Several large branches and trees were downed by thunderstorm winds in town.

Thunderstorm Wind in PLATTE, NEBRASKA
From 12-AUG-07 14:37:00 to 12-AUG-07 14:37:00 (CST-6)
Location: COLUMBUS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds were estimated at 60 to 70 mph by the public.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 12-AUG-07 16:46:00 to 12-AUG-07 16:46:00 (CST-6)
Location: OMAHA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm wind gust estimated at around 60 mph was reported near 21st and Polk Streets in south Omaha.

Thunderstorm Wind in CASS, NEBRASKA
From 12-AUG-07 16:50:00 to 12-AUG-07 16:50:00 (CST-6)
Location: PLATTSMOUTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm wind gusts estimated at 60 mph downed large tree branches and power lines in town.

Thunderstorm Wind in PLATTE, NEBRASKA
From 12-AUG-07 14:40:00 to 12-AUG-07 14:40:00 (CST-6)
Location: COLUMBUS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported 60 to 70 mph winds southwest of Columbus knocking down a few tree limbs.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 12-AUG-07 15:50:00 to 12-AUG-07 15:50:00 (CST-6)
Location: WESTON
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The cooperative observer near Weston measured a thunderstorm wind gust of 73 mph.

Thunderstorm Wind in CUMING, NEBRASKA
From 12-AUG-07 15:51:00 to 12-AUG-07 15:56:00 (CST-6)
Location: WEST PT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm winds estimated at 60 mph downed several 3 to 5 inch in diameter tree limbs.  There were 2 periods of the strongest winds within about 5 minutes of each other.

Thunderstorm Wind in COLFAX, NEBRASKA
From 12-AUG-07 15:00:00 to 12-AUG-07 15:00:00 (CST-6)
Location: RICHLAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds estimated at 60 mph downed several tree limbs 3 inches and larger in diameter.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 12-AUG-07 15:53:00 to 12-AUG-07 15:53:00 (CST-6)
Location: WAHOO
Magnitude: 59.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A thunderstorm wind gust was measured at 68 mph by an area media meteorologist.

Thunderstorm Wind in BUTLER, NEBRASKA
From 12-AUG-07 14:59:00 to 12-AUG-07 14:59:00 (CST-6)
Location: BELLWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds did damage to the roof and south wall of a trailer house.

Thunderstorm Wind in COLFAX, NEBRASKA
From 12-AUG-07 15:10:00 to 12-AUG-07 15:10:00 (CST-6)
Location: SCHUYLER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree was blown down across the highway just north of town by thunderstorm winds estimated at 60 mph.

Thunderstorm Wind in SEWARD, NEBRASKA
From 12-AUG-07 15:15:00 to 12-AUG-07 15:15:00 (CST-6)
Location: SEWARD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree limbs up to 3 inches in diameter were downed by thunderstorm winds estimated at 60 mph.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 12-AUG-07 16:02:00 to 12-AUG-07 16:02:00 (CST-6)
Location: WESTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds were estimated at 70 mph by a amateur radio operator.

Thunderstorm Wind in CUMING, NEBRASKA
From 12-AUG-07 16:05:00 to 12-AUG-07 16:05:00 (CST-6)
Location: WEST PT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds estimated at 70 mph flattened and stripped corn west of West Point.

Thunderstorm Wind in WASHINGTON, NEBRASKA
From 12-AUG-07 16:13:00 to 12-AUG-07 16:13:00 (CST-6)
Location: BLAIR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A thunderstorm wind gust was estimated at 60 mph by an area media meteorologist.

Flash Flood in SAUNDERS, NEBRASKA
From 12-AUG-07 17:30:00 to 12-AUG-07 20:30:00 (CST-6)
Location: WAHOO
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Rainfall of an inch or two in less than 1 hour caused areas of flash flooding along Wahoo Creek and a few of it's tributaries.  About a dozen roads in the area were barricaded for a while, and state Highway 92 was closed near Wahoo for a while because of flood waters.

Thunderstorm Wind in LANCASTER, NEBRASKA
From 12-AUG-07 15:40:00 to 12-AUG-07 15:40:00 (CST-6)
Location: MALCOLM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree limbs up to 3 inches in diameter were broke off by thunderstorm winds estimated at 60 mph.

Thunderstorm Wind in BURT, NEBRASKA
From 12-AUG-07 15:50:00 to 12-AUG-07 15:50:00 (CST-6)
Location: OAKLAND
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were reported downed southwest of Oakland near the Dodge county line.

Thunderstorm Wind in SARPY, NEBRASKA
From 12-AUG-07 16:15:00 to 12-AUG-07 16:15:00 (CST-6)
Location: GRETNA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large wooden play set was flipped over by thunderstorm winds estimated at 60 mph.

Thunderstorm Wind in SARPY, NEBRASKA
From 12-AUG-07 16:40:00 to 12-AUG-07 16:40:00 (CST-6)
Location: BELLEVUE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds estimated at 60 mph downed a few trees in town causing power outages.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 12-AUG-07 16:10:00 to 12-AUG-07 16:20:00 (CST-6)
Location: WAHOO
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm wind gusts estimated at 70 to 75 mph did significant damage to corn and trees in an area 6 miles wide by 10 miles long from east of Wahoo to northeast of Ashland according a local crop consultant.  A grove of elm trees was uprooted and corn flattened in the area.
In the Camp Ashland area, approximately 50 trees were destroyed and several roofs sustained damage.

Thunderstorm Wind in DODGE, NEBRASKA
From 12-AUG-07 15:45:00 to 12-AUG-07 15:45:00 (CST-6)
Location: UEHLING
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and power lines were downed in town due to thunderstorm winds estimated at around 70 mph.  Several windows in town were blown out by the winds along with some door, roof and vehicle damage.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 12-AUG-07 16:05:00 to 12-AUG-07 16:05:00 (CST-6)
Location: OMAHA
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A gust of 58 mph was measured by wind equipment near 150th and Fort Streets.  The strong winds spread across the Omaha area causing scattered tree damage including on large tree that fell on 2 cars near the 4600 block on South 34th Street.  Also a tree fell across South 15th Street near the 1900 block blocking traffic.