Scattered thunderstorms, a few severe, developed and moved north of a warm front that extended near the Kansas and Nebraska border.  The storms development was aided by a large upper level low pressure system that was moving slowly east across the plains and the main severe weather produced was large hail.  Several of these thunderstorms tracked across the Omaha metro area producing numerous reports of nickel to quarter-size hail in the Millard area and surrounding areas of northern Sarpy county and southwest Omaha.

Hail in DOUGLAS, NEBRASKA
From 12-MAY-10 20:05:00 to 12-MAY-10 20:05:00 (CST-6)
Location: OMAHA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Near 35th and Farnam Streets.

Hail in SARPY, NEBRASKA
From 12-MAY-10 19:42:00 to 12-MAY-10 19:48:00 (CST-6)
Location: CHALCO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Nickel to quarter-size hail was reported from just northeast of Gretna through the 151st and Giles Street area.

Hail in SARPY, NEBRASKA
From 12-MAY-10 19:30:00 to 12-MAY-10 19:30:00 (CST-6)
Location: CHALCO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reported near 161st and Giles.

Hail in SALINE, NEBRASKA
From 12-MAY-10 18:38:00 to 12-MAY-10 18:38:00 (CST-6)
Location: WILBER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in SALINE, NEBRASKA
From 12-MAY-10 18:03:00 to 12-MAY-10 18:06:00 (CST-6)
Location: CRETE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel to quarter-size hail fell for several minutes in the Crete area.

Hail in SAUNDERS, NEBRASKA
From 12-MAY-10 18:50:00 to 12-MAY-10 18:52:00 (CST-6)
Location: VALPARAISO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Most of it was smaller but a few stones up to one inch in diameter fell east through northeast of Valparaiso.

Hail in JEFFERSON, NEBRASKA
From 12-MAY-10 18:00:00 to 12-MAY-10 18:00:00 (CST-6)
Location: FAIRBURY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

From the second supercell thunderstorm that dropped large hail within an hour southwest of Fairbury.

Hail in LANCASTER, NEBRASKA
From 12-MAY-10 18:12:00 to 12-MAY-10 18:12:00 (CST-6)
Location: BERKS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Most of the hail was less than 1 inch in diameter.

Hail in LANCASTER, NEBRASKA
From 12-MAY-10 19:15:00 to 12-MAY-10 19:15:00 (CST-6)
Location: WEST LINCOLN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Reported near 84th and Van Dorn Streets.

Hail in DOUGLAS, NEBRASKA
From 12-MAY-10 19:42:00 to 12-MAY-10 19:54:00 (CST-6)
Location: OMAHA MILLARD ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail was reported from near 177th and Harrison to 108th and L Streets in southwest Omaha.

Hail in JEFFERSON, NEBRASKA
From 12-MAY-10 17:48:00 to 12-MAY-10 17:48:00 (CST-6)
Location: FAIRBURY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The first of two supercell thunderstorms that dropped large hail southwest of Fairbury.

Hail in DOUGLAS, NEBRASKA
From 12-MAY-10 19:46:00 to 12-MAY-10 19:46:00 (CST-6)
Location: MILLARD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Most of the hail in southwest Omaha was nickel-size but some up to one inch in diameter was reported northwest of 159th and Giles.