Severe thunderstorms developed in north central Nebraska on the afternoon of August 11th in the vicinity of a warm front draped from southwest South Dakota into northeast Nebraska.  The storms quickly became tornadic with six tornados occurring by the end of the evening.  The largest tornado was classified as an EF3 and touched down over southeast Cherry county and traveled into Brown county before lifting.  The other tornadoes produced minimal damage and were rated EF0's and EF1's.  Large hail also impacted these areas, with the largest size being tennis ball size.

Hail in BROWN, NEBRASKA
From 11-AUG-11 19:03:00 to 11-AUG-11 19:03:00 (CST-6)
Location: (ANW)AINSWORTH MUNI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in CHASE, NEBRASKA
From 11-AUG-11 18:10:00 to 11-AUG-11 18:10:00 (MST-7)
Location: LAMAR
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BLAINE, NEBRASKA
From 11-AUG-11 23:00:00 to 11-AUG-11 23:00:00 (CST-6)
Location: BREWSTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BOYD, NEBRASKA
From 11-AUG-11 18:28:00 to 11-AUG-11 18:28:00 (CST-6)
Location: NAPER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated to have blown at 60 m.p.h.

Tornado in CHERRY, NEBRASKA
From 11-AUG-11 18:49:00 to 11-AUG-11 18:50:00 (CST-6)
Location: WOOD LAKE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The tornado briefly touched down with no damage being observed and was rated as an EF0. The spotter indicated the condensation funnel did not extend completely from the funnel to the ground, but debris was seen flying under the funnel.

Tornado in BROWN, NEBRASKA
From 11-AUG-11 19:54:00 to 11-AUG-11 20:02:00 (CST-6)
Location: JOHNSTOWN
Tornado F-scale: EF0
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado touched down and traveled southeast about one mile, crossed a road and moved another two miles before lifting.  Two trees were twisted off close to the point of touch down, with no additional damage noted.  The maximum wind speed was 75 m.p.h., and the tornado was rated a EF0.

Thunderstorm Wind in KEYA PAHA, NEBRASKA
From 11-AUG-11 19:00:00 to 11-AUG-11 19:00:00 (CST-6)
Location: BURTON
Magnitude: 52.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts blew down several tree limbs up to 10 inches in diameter.

Tornado in THOMAS, NEBRASKA
From 11-AUG-11 20:53:00 to 11-AUG-11 20:54:00 (CST-6)
Location: HALSEY
Tornado F-scale: EF0
Property damage: 11.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down one mile west northwest of Purdum and caused damage to trees and power lines.  Large limbs from elm trees were snapped off and displaced up to 300 feet to the south.  Also, four power poles on the south side of the road were snapped off and 250 feet of barbed wire fencing was damaged.

Hail in BROWN, NEBRASKA
From 11-AUG-11 19:15:00 to 11-AUG-11 19:15:00 (CST-6)
Location: JOHNSTOWN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROCK, NEBRASKA
From 11-AUG-11 19:25:00 to 11-AUG-11 19:25:00 (CST-6)
Location: BASSETT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHERRY, NEBRASKA
From 11-AUG-11 19:35:00 to 11-AUG-11 19:35:00 (CST-6)
Location: BROWNLEE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in CHERRY, NEBRASKA
From 11-AUG-11 19:00:00 to 11-AUG-11 19:02:00 (CST-6)
Location: WOOD LAKE
Tornado F-scale: EF1
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The tornado destroyed a 12 foot by 16 foot storage building and rolled a metal calving shed over 300 feet.  Three large hay bails were rolled up an incline and damaged fencing and a swing set.  A detached garage door was also damaged and the chimney was torn off of the house.

Tornado in BROWN, NEBRASKA
From 11-AUG-11 18:58:00 to 11-AUG-11 18:59:00 (CST-6)
Location: (ANW)AINSWORTH MUNI
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tornado briefly touched down in an open field eight miles north-northwest of Ainsworth.  No damage occurred from this tornado and it was rated an EF0.

Hail in CHASE, NEBRASKA
From 11-AUG-11 18:40:00 to 11-AUG-11 18:40:00 (MST-7)
Location: LAMAR
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BLAINE, NEBRASKA
From 11-AUG-11 21:02:00 to 11-AUG-11 21:02:00 (CST-6)
Location: PURDUM
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer noted that winds were from the south and rapidly switched to the north as the storm passed.

Hail in BLAINE, NEBRASKA
From 11-AUG-11 21:40:00 to 11-AUG-11 21:40:00 (CST-6)
Location: DUNNING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The hail fell along State Highway 91 at mile marker 3.

Hail in BLAINE, NEBRASKA
From 11-AUG-11 23:40:00 to 11-AUG-11 23:40:00 (CST-6)
Location: BREWSTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in SHERIDAN, NEBRASKA
From 11-AUG-11 23:27:00 to 11-AUG-11 23:27:00 (MST-7)
Location: GORDON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in BROWN, NEBRASKA
From 11-AUG-11 19:22:00 to 11-AUG-11 19:23:00 (CST-6)
Location: JOHNSTOWN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado briefly touched down five miles north of Johnstown.  No damage occurred from this tornado.

Funnel Cloud in BROWN, NEBRASKA
From 11-AUG-11 19:15:00 to 11-AUG-11 19:15:00 (CST-6)
Location: JOHNSTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in BLAINE, NEBRASKA
From 11-AUG-11 21:22:00 to 11-AUG-11 21:22:00 (CST-6)
Location: PURDUM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in THOMAS, NEBRASKA
From 11-AUG-11 22:30:00 to 11-AUG-11 22:30:00 (CST-6)
Location: HALSEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHERRY, NEBRASKA
From 11-AUG-11 20:10:00 to 11-AUG-11 20:10:00 (CST-6)
Location: BROWNLEE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter to golf ball size hail fell, while 2.45 inches of rain was also recorded as the thunderstorm passed.

Hail in KEYA PAHA, NEBRASKA
From 11-AUG-11 19:00:00 to 11-AUG-11 19:00:00 (CST-6)
Location: BURTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in KEYA PAHA, NEBRASKA
From 11-AUG-11 18:55:00 to 11-AUG-11 18:55:00 (CST-6)
Location: BURTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHERRY, NEBRASKA
From 11-AUG-11 22:00:00 to 11-AUG-11 22:00:00 (CST-6)
Location: BROWNLEE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in CHERRY, NEBRASKA
From 11-AUG-11 19:05:00 to 11-AUG-11 19:25:00 (CST-6)
Location: WOOD LAKE
Tornado F-scale: EF3
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado developed five miles south-southeast of Wood Lake and traveled to the south.  It was on the ground for approximately 20 minutes and was up to a maximum of a half mile wide with maximum winds of 140 m.p.h.  The tornado caused damage to two tree groves.  One tree was debarked, uprooted, and moved while several other trees were uprooted.  Additionally, a windmill was destroyed and another three were damaged; a steel culvert from Plum Creek washed out and was broken and displaced three-quarters a mile downstream.  Also, two miles of barb wire fencing was destroyed.