A large upper level low pressure system moved from northwest Kansas into south central Nebraska during the late afternoon and evening of June 20.  Temperatures and dew point temperatures ahead of the low climbed to around 90 and lower 70s respectively near and south of a warm front that extended east northeast from low pressure in southwest Nebraska.  Strong levels of wind shear combined with the high instability to produce several spiral bands of embedded supercell thunderstorms that produced fairly widespread wind damage and at least 2 tornadoes across the region.

Thunderstorm Wind in PLATTE, NEBRASKA
From 20-JUN-11 17:49:00 to 20-JUN-11 17:49:00 (CST-6)
Location: MONROE
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds were estimated at around 60 mph in the Monroe area.  The supercell that caused the strong winds earlier produced a tornado south of the region.

Thunderstorm Wind in DODGE, NEBRASKA
From 20-JUN-11 19:20:00 to 20-JUN-11 19:20:00 (CST-6)
Location: FREMONT
Magnitude: 60.00 EG
Reported by: Public

Thunderstorm winds estimated at over 60 mph, perhaps caused by a tornado which was determined to cross the area, downed full size trees near Bell Street.

Hail in PLATTE, NEBRASKA
From 20-JUN-11 17:57:00 to 20-JUN-11 17:57:00 (CST-6)
Location: MONROE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

From the same storm that earlier produced a tornado south of the region and also caused a wind gust estimated at 60 mph in the area.

Hail in MADISON, NEBRASKA
From 20-JUN-11 18:38:00 to 20-JUN-11 18:38:00 (CST-6)
Location: MADISON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball-size hail fell from a thunderstorm that trailed the supercell that brought wind gusts of over 60 mph to the region.

Thunderstorm Wind in BURT, NEBRASKA
From 20-JUN-11 19:36:00 to 20-JUN-11 19:36:00 (CST-6)
Location: TEKAMAH
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Asos at Tekamah measured a thunderstorm wind gust of 60 mph.

Thunderstorm Wind in KNOX, NEBRASKA
From 20-JUN-11 19:03:00 to 20-JUN-11 19:03:00 (CST-6)
Location: CROFTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts estimated at close to 70 mph downed a large tree onto Highway 12 near Crofton.

Thunderstorm Wind in GAGE, NEBRASKA
From 20-JUN-11 18:40:00 to 20-JUN-11 18:43:00 (CST-6)
Location: ADAMS
Magnitude: 55.00 EG
Reported by: Fire Department/Rescue

Thunderstorm wind gusts estimated at over 60 mph downed several trees and power lines near Adams.

Hail in PLATTE, NEBRASKA
From 20-JUN-11 18:10:00 to 20-JUN-11 18:10:00 (CST-6)
Location: PLATTE CENTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

From the same supercell thunderstorm that produced a tornado south of the area.

Hail in JEFFERSON, NEBRASKA
From 20-JUN-11 16:53:00 to 20-JUN-11 16:54:00 (CST-6)
Location: ENDICOTT
Magnitude: 1.25 
Reported by: Emergency Manager

Hail up to half dollar-size covered the ground southeast of Fairbury.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 20-JUN-11 18:55:00 to 20-JUN-11 18:55:00 (CST-6)
Location: YUTAN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A thunderstorm wind gust estimated at close to 70 mph downed 15 inch in diameter trees near Yutan.

Funnel Cloud in PLATTE, NEBRASKA
From 20-JUN-11 18:00:00 to 20-JUN-11 18:00:00 (CST-6)
Location: SHELDONVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An off duty law enforcement officer observed a rotating wall cloud and funnel northwest of Columbus.  The storm that produced this dropped a tornado south of the county a little earlier and did damage north of here in Madison and Pierce counties several minutes later.

Thunderstorm Wind in THURSTON, NEBRASKA
From 20-JUN-11 20:00:00 to 20-JUN-11 20:00:00 (CST-6)
Location: WINNEBAGO
Magnitude: 60.00 EG
Reported by: Law Enforcement

Thunderstorm wind gusts estimated at around 70 mph downed or broke numerous trees in the Winnebago area.

Thunderstorm Wind in CASS, NEBRASKA
From 20-JUN-11 19:50:00 to 20-JUN-11 19:50:00 (CST-6)
Location: MURRAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A thunderstorm wind gust estimated at around 60 mph was observed in the Murray area.

Thunderstorm Wind in THURSTON, NEBRASKA
From 20-JUN-11 19:35:00 to 20-JUN-11 19:35:00 (CST-6)
Location: ROSALIE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts estimated at close to 70 mph downed many trees in the Rosalie area.

Thunderstorm Wind in ANTELOPE, NEBRASKA
From 20-JUN-11 18:30:00 to 20-JUN-11 18:30:00 (CST-6)
Location: ROYAL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts estimated at over 60 mph blew tree debris onto Highway 20 near Royal.

Thunderstorm Wind in WASHINGTON, NEBRASKA
From 20-JUN-11 19:30:00 to 20-JUN-11 19:30:00 (CST-6)
Location: ARLINGTON
Magnitude: 60.00 EG
Reported by: Newspaper

Thunderstorm winds estimated at over 60 mph caused scattered tree and farm outbuilding damage from around Arlington through the Herman area.

Hail in JEFFERSON, NEBRASKA
From 20-JUN-11 17:45:00 to 20-JUN-11 17:45:00 (CST-6)
Location: FAIRBURY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in KNOX, NEBRASKA
From 20-JUN-11 18:50:00 to 20-JUN-11 18:55:00 (CST-6)
Location: BLOOMFIELD
Magnitude: 60.00 EG
Reported by: Law Enforcement

Thunderstorm wind gusts estimated at around 70 mph downed trees and did farm outbuilding damage from around Wausa to near Bloomfield.  Downed trees also caused some home damage in the area.

Thunderstorm Wind in CEDAR, NEBRASKA
From 20-JUN-11 18:50:00 to 20-JUN-11 18:50:00 (CST-6)
Location: MAGNET
Magnitude: 60.00 EG
Reported by: Fire Department/Rescue

Thunderstorm wind gusts estimated at close to 70 mph downed several trees in Magnet and moved a building off of its foundation northwest of town.  The downed trees also downed power lines causing a power outage in the area.

Tornado in DODGE, NEBRASKA
From 20-JUN-11 19:00:00 to 20-JUN-11 19:08:00 (CST-6)
Location: FREMONT
Tornado F-scale: EF1
Property damage: 280.00K
Reported by: NWS Storm Survey

A NWS survey team determined a tornado tracked through the eastern and northern sections of Fremont before lifting a little north northeast of town.  The tornado touched down near the intersection of old Highway 275 and Morningside Road and progressed north generally east of Lincoln Street.  The tornado uprooted or snapped numerous trees, damaged a few homes and severely damaged a garage along its path.  One vehicle was flipped over while other vehicles and homes sustained damage from fallen trees.  The YMCA sustained major roof damage.  A few power poles were snapped near and north of 23rd Street and center pivot was damaged on the north side of town before the tornado lifted.  The path length was determined to be a little over 6 miles while the average width of the damage path was around 700 yards.  As of late June the damage in town was estimated at a little over a quarter of million dollars.

Thunderstorm Wind in ANTELOPE, NEBRASKA
From 20-JUN-11 18:10:00 to 20-JUN-11 18:20:00 (CST-6)
Location: ELGIN
Magnitude: 61.00 EG
Reported by: Law Enforcement

Law enforcement estimated thunderstorm wind gusts hit 70 mph near Oakdale.  The strong winds extended from northwest of Elgin into the Oakdale area and flipped numerous center pivots in Antelope county, with at least 40 to 45 systems destroyed and 12 to 14 grain bins severely damaged as well.  Tree damage was also noted in the area.

Hail in PLATTE, NEBRASKA
From 20-JUN-11 18:30:00 to 20-JUN-11 18:30:00 (CST-6)
Location: HUMPHREY
Magnitude: 2.00 
Reported by: Public

Hail, a few stones a little bigger than golfball-size, fell in the Humphrey area.  There were some reports of baseball-size and larger stones in the area as well, although the larger stones were apparently few and far between and not confirmed.  Some vehicle and crop damage was noted in the region.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 20-JUN-11 18:59:00 to 20-JUN-11 18:59:00 (CST-6)
Location: VALLEY
Magnitude: 63.00 MG
Reported by: Official NWS Observations

A thunderstorm wind gust was measured at 72 mph at the NWS office near Valley.  The winds knocked down power poles along Meigs Street west of Highway 275 in Valley.

Thunderstorm Wind in MADISON, NEBRASKA
From 20-JUN-11 18:06:00 to 20-JUN-11 18:30:00 (CST-6)
Location: (OFK)STEFAN FLD NORF
Magnitude: 55.00 MG
Reported by: ASOS

A thunderstorm gust of 63 mph was measured by Asos at the Norfolk Stefan Airport.  The strong winds downed trees which in turn downed power lines and caused vehicle and house damage in town.  Small hail also covered the ground in parts of town.

Thunderstorm Wind in CEDAR, NEBRASKA
From 20-JUN-11 19:00:00 to 20-JUN-11 19:05:00 (CST-6)
Location: MAGNET
Magnitude: 61.00 EG
Reported by: Emergency Manager

Thunderstorm winds estimated at around 70 mph downed trees and power lines in the Hartington area causing power outages.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 20-JUN-11 19:07:00 to 20-JUN-11 19:30:00 (CST-6)
Location: BOYS TOWN
Magnitude: 60.00 MG
Reported by: ASOS

A thunderstorm wind gust of 69 mph was measured by Asos at Omaha Eppley Airfield at 820 pm Cdt.  The winds caused substantial tree damage in parts of town, notably near  and east northeast of 156th and Blondo Streets, near Bennington and also in parts of midtown. Fences and outbuildings also sustained damage in those areas.  Some other scattered tree damage was noted in town and power was knocked out to parts of town as well.

Thunderstorm Wind in ANTELOPE, NEBRASKA
From 20-JUN-11 18:30:00 to 20-JUN-11 18:30:00 (CST-6)
Location: CLEARWATER
Magnitude: 60.00 EG
Reported by: Trained Spotter

Thunderstorm winds estimated at close to 70 mph tore apart a farm outbuilding south of Clearwater.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 20-JUN-11 18:55:00 to 20-JUN-11 18:58:00 (CST-6)
Location: MEAD
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated a thunderstorm wind gust reached close to 70 mph in the Mead area.

Tornado in WASHINGTON, NEBRASKA
From 20-JUN-11 19:09:00 to 20-JUN-11 19:15:00 (CST-6)
Location: KENNARD
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A tornado started 2 1/2 miles west-southwest of Kennard and moved north-northeast.  The tornado dented in silos, snapped trees, and removed roofing off sheds.  The tornado briefly reached EF1 strength west of Blair where a shed was severely damaged and trees were uprooted. The tornado ended about 2 1/2 miles west of Blair on Highway 91.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 20-JUN-11 18:40:00 to 20-JUN-11 18:44:00 (CST-6)
Location: ASHLAND
Magnitude: 60.00 EG
Reported by: Emergency Manager

Thunderstorm winds estimated at around 70 mph downed dozens of trees or large limbs in the Ashland area including some 2 feet in diameter.  Around 40 headstones at the Ashland Cemetery were knocked over by fallen trees or limbs.  Some building damage was noted in town as well.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 20-JUN-11 18:58:00 to 20-JUN-11 18:58:00 (CST-6)
Location: LANE
Magnitude: 60.00 EG
Reported by: Trained Spotter

Thunderstorm winds estimated at around 70 mph blew the siding off of a house near Elkhorn and also caused barn and other building damage in the area.  A pickup truck was crushed by a metal building that flew into it.  This was from a storm that brought a measured wind gust of 72 mph at the NWS in Valley and also caused wind damage in parts of Omaha.

Tornado in PIERCE, NEBRASKA
From 20-JUN-11 18:27:00 to 20-JUN-11 18:40:00 (CST-6)
Location: PIERCE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

An EF1 tornado was determined to cause damage from southeast of Pierce to east of Osmond.  The initial damage from the tornado was noted near 522nd Avenue and 852nd Street where trees were uprooted.  The tornado tracked north northwest striking a farm after it crossed Highway 98 destroying farm outbuildings and uprooting trees in the area.  The tornado uprooted or caused other tree damage along its path and destroyed other farm outbuildings and flipped center pivots.  In one area along its path the track became visible in a corn field.  Some power poles were downed and in one case farm equipment was tossed over 300 yards while another farmstead had its debris carried nearly a quarter of a mile to the northwest.  In addition, a steel bin was blown about 300 feet onto Highway 81 near the Jct. with Old Highway 98 where a car hit it injuring a man and totaling his car.  A small part of a roof of a home of another farmstead was removed.  A large chicken barn near Old Highway 98 had its roof blown off.  The tornado appeared to weaken as it moved north toward 864th Road overturning more pivots and producing tree damage before ending near that area.

Thunderstorm Wind in PIERCE, NEBRASKA
From 20-JUN-11 18:35:00 to 20-JUN-11 18:41:00 (CST-6)
Location: PIERCE
Magnitude: 65.00 EG
Reported by: Emergency Manager

Thunderstorm wind gusts estimated at over 70 mph caused significant tree and outbuilding damage from around 2 miles southwest of Willow Lake through Pierce and a little northwest of town.  A house also lost part of its roof south of Willow Lake.   Downed power lines also caused loss of power in the area.  The damage could have been from a possible tornado that a NWS storm assessment team determined to track near this area.