Supercell thunderstorms developed from west of Columbus toward and east of Norfolk as a warm front pressed north toward that region as a cold front was dropping south through northern Nebraska.  South of the warm front temperatures climbed to around 90 degrees with dewpoint temperatures around 70.  Meanwhile north of the cold front temperatures were in the 60s and 70s.  As the two boundaries merged in the late afternoon the storms merged into a line which pushed southeast across the Omaha and Lincoln areas.   The northern end of the storms caused wind damage across the northern sections of Omaha and was the beginning of a derecho which caused wind damage to parts of 3 other states as it swept eastward.   The storms also produced numerous reports of large hail and at least 2 weak tornadoes.

Hail in DOUGLAS, NEBRASKA
From 01-JUN-10 16:38:00 to 01-JUN-10 16:55:00 (CST-6)
Location: LANE
Magnitude: 1.25 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail of 1 inch to half dollar-size in diameter was reported from west Omaha into the western sections of midtown near 108th and Grover and 108th and I Streets.  The half dollar-size hail was reported near 180th and Q Streets and north of 144th and Center.  The hail caused some car and plant damage.

Hail in SARPY, NEBRASKA
From 01-JUN-10 16:50:00 to 01-JUN-10 16:50:00 (CST-6)
Location: J AND J ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in SARPY, NEBRASKA
From 01-JUN-10 16:54:00 to 01-JUN-10 17:02:00 (CST-6)
Location: PAPILLION
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail around 1 inch in diameter fell for just under 10 minutes around the 84th and Cornhusker area.

Hail in SARPY, NEBRASKA
From 01-JUN-10 16:52:00 to 01-JUN-10 16:55:00 (CST-6)
Location: GRETNA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail up to 1.5 inches in diameter fell near Gretna.

Hail in STANTON, NEBRASKA
From 01-JUN-10 13:55:00 to 01-JUN-10 14:00:00 (CST-6)
Location: STANTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Golf ball-size hail fell south through southeast of Stanton.

Thunderstorm Wind in CUMING, NEBRASKA
From 01-JUN-10 14:30:00 to 01-JUN-10 14:45:00 (CST-6)
Location: WEST PT
Magnitude: 55.00 EG
Property damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm wind gusts estimated at over 60 mph caused areas of crop damage across the southern part of Cuming county.

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 01-JUN-10 16:25:00 to 01-JUN-10 16:30:00 (CST-6)
Location: WESTON
Magnitude: 55.00 EG
Reported by: Amateur Radio

Thunderstorm wind gusts estimated at over 60 mph uprooted a tree and blew over a carport near Weston and caused scattered tree damage from there into the Wahoo area.  Some of the trees or large limbs that fell in Wahoo caused some generally minor vehicle, home and other structural damage.

Hail in CUMING, NEBRASKA
From 01-JUN-10 15:00:00 to 01-JUN-10 15:12:00 (CST-6)
Location: WISNER
Magnitude: 2.50 
Reported by: Fire Department/Rescue

Hail up to 2.5 inches in diameter fell southwest through south of Wisner.   The hail fell for nearly 15 minutes and accumulated up to 2 to 3 feet in some ditches aided by 2 to 3 inches of rain that fell during and after the hail.

Thunderstorm Wind in LANCASTER, NEBRASKA
From 01-JUN-10 18:46:00 to 01-JUN-10 18:46:00 (CST-6)
Location: HOLLAM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts estimated at 60 mph were accompanied by dime-size hail.

Thunderstorm Wind in JEFFERSON, NEBRASKA
From 01-JUN-10 19:02:00 to 01-JUN-10 19:02:00 (CST-6)
Location: PLYMOUTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts estimated at 60 mph were accompanied by hail that reached 1 inch in diameter.

Hail in LANCASTER, NEBRASKA
From 01-JUN-10 17:40:00 to 01-JUN-10 17:40:00 (CST-6)
Location: UNIVERSITY PLACE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Reported on the east side of town along 84th Street.

Tornado in CASS, NEBRASKA
From 01-JUN-10 17:05:00 to 01-JUN-10 17:06:00 (CST-6)
Location: CEDAR CREEK
Tornado F-scale: EF1
Property damage: 4.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado touchdown caused damage to a pole barn before lifting near Highway 66.

Hail in SALINE, NEBRASKA
From 01-JUN-10 17:39:00 to 01-JUN-10 17:39:00 (CST-6)
Location: FRIEND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SEWARD, NEBRASKA
From 01-JUN-10 17:32:00 to 01-JUN-10 17:32:00 (CST-6)
Location: GOEHNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Hail in LANCASTER, NEBRASKA
From 01-JUN-10 18:46:00 to 01-JUN-10 18:46:00 (CST-6)
Location: HOLLAM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, NEBRASKA
From 01-JUN-10 19:00:00 to 01-JUN-10 19:00:00 (CST-6)
Location: FAIRBURY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SALINE, NEBRASKA
From 01-JUN-10 18:36:00 to 01-JUN-10 18:36:00 (CST-6)
Location: WESTERN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The hail reached quarter-size a few minutes later.

Hail in SALINE, NEBRASKA
From 01-JUN-10 18:40:00 to 01-JUN-10 18:43:00 (CST-6)
Location: WILBER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail up to nickel-size fell for several minutes around the Wilber area.

Hail in SALINE, NEBRASKA
From 01-JUN-10 18:44:00 to 01-JUN-10 18:44:00 (CST-6)
Location: WESTERN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy Rain in SALINE, NEBRASKA
From 01-JUN-10 18:45:00 to 01-JUN-10 18:45:00 (CST-6)
Location: WILBER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall of 1.5 to 2 inches fell in an hour or less and caused some minor street flooding in town.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 01-JUN-10 16:35:00 to 01-JUN-10 16:57:00 (CST-6)
Location: ELK CITY
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts estimated at over 65 mph downed trees from near Bennington toward 72nd Street and Highway 36.  Three vehicles were hit by falling trees resulting in one minor injury in the 72nd Street area where in one-quarter mile stretch numerous trees were downed across the road.  Some sheds were blown away or destroyed in the Bennington area.  Other trees were downed in the Highway 36 and 132nd Street area.  Tree damage was observed a mile or two either side of Highway 36 from the storm.

Hail in DODGE, NEBRASKA
From 01-JUN-10 16:08:00 to 01-JUN-10 16:11:00 (CST-6)
Location: FREMONT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail up to golf ball-size fell in the Fremont area for several minutes.

Hail in BURT, NEBRASKA
From 01-JUN-10 15:13:00 to 01-JUN-10 15:13:00 (CST-6)
Location: OAKLAND
Magnitude: 2.80 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in DOUGLAS, NEBRASKA
From 01-JUN-10 16:20:00 to 01-JUN-10 16:20:00 (CST-6)
Location: BENNINGTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The hail was accompanied by winds at least 40 to 50 mph.

Hail in WASHINGTON, NEBRASKA
From 01-JUN-10 16:20:00 to 01-JUN-10 16:20:00 (CST-6)
Location: BLAIR
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail of nickel to golf ball-size preceded or fell just as thunderstorm wind gusts measured around 70 mph by the Awos in Blair, which is several miles south of town.

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 01-JUN-10 16:44:00 to 01-JUN-10 16:46:00 (CST-6)
Location: ELKHORN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm spotters estimated thunderstorm winds around 60 mph from the Elkhorn area to just north of 144th and Center.

Hail in WASHINGTON, NEBRASKA
From 01-JUN-10 16:18:00 to 01-JUN-10 16:19:00 (CST-6)
Location: BLAIR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail around nickel size fell from just south of Blair into Blair just before becoming Golf ball-size.

Hail in DOUGLAS, NEBRASKA
From 01-JUN-10 16:50:00 to 01-JUN-10 16:50:00 (CST-6)
Location: ELKHORN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Near Dodge and Skyline.

Thunderstorm Wind in SARPY, NEBRASKA
From 01-JUN-10 16:55:00 to 01-JUN-10 16:55:00 (CST-6)
Location: BELLEVUE
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds estimated at close to 60 mph downed trees and power lines forcing several streets to be barricaded by police.

Hail in DOUGLAS, NEBRASKA
From 01-JUN-10 16:25:00 to 01-JUN-10 16:25:00 (CST-6)
Location: BENNINGTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Reported near the Washington county line in the northwest part of Douglas county.

Hail in DODGE, NEBRASKA
From 01-JUN-10 15:36:00 to 01-JUN-10 15:36:00 (CST-6)
Location: UEHLING
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail up to golf ball-size covered the ground.

Thunderstorm Wind in WASHINGTON, NEBRASKA
From 01-JUN-10 16:20:00 to 01-JUN-10 16:20:00 (CST-6)
Location: ARLINGTON
Magnitude: 50.00 EG
Reported by: Newspaper

Thunderstorm wind gusts estimated at close to 60 mph knocked down a few large tree limbs causing minor structural damage in Arlington.

Hail in DODGE, NEBRASKA
From 01-JUN-10 15:45:00 to 01-JUN-10 15:45:00 (CST-6)
Location: WINSLOW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WASHINGTON, NEBRASKA
From 01-JUN-10 16:00:00 to 01-JUN-10 16:00:00 (CST-6)
Location: SPIKER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in WAYNE, NEBRASKA
From 01-JUN-10 13:58:00 to 01-JUN-10 14:00:00 (CST-6)
Location: ALTONA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado briefly touched down about 9 miles north of Wisner and was on the ground for around a mile and a quarter.  Soybean crops were damaged by the tornado with little other damage noted.  There were some local reports that the tornado moved south and then southwest while the parent thunderstorm was moving northeast.

Hail in DOUGLAS, NEBRASKA
From 01-JUN-10 17:10:00 to 01-JUN-10 17:10:00 (CST-6)
Location: OMAHA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Reported on the east side of Omaha.

Hail in SEWARD, NEBRASKA
From 01-JUN-10 16:59:00 to 01-JUN-10 16:59:00 (CST-6)
Location: UTICA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LANCASTER, NEBRASKA
From 01-JUN-10 17:30:00 to 01-JUN-10 17:30:00 (CST-6)
Location: MALCOLM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WASHINGTON, NEBRASKA
From 01-JUN-10 16:30:00 to 01-JUN-10 16:30:00 (CST-6)
Location: FT CALHOUN
Magnitude: 62.00 MG
Reported by: AWOS

A thunderstorm wind gust of 71 mph was measured by the Awos at the Blair Airport, about 7 miles south of town.  The winds knocked down trees and large limbs from around Blair into the southeast part of Washington county.   Some vehicle and other damage was noted around Blair.  Hail up to golf ball-size fell around this same time in Blair.