Scattered thunderstorms, a few severe with damaging winds and large hail, developed along a slow moving cold front during the late afternoon of May 23rd.  The storms tracked northeast and kept developing a bit farther southeast into the evening as the front slowly pushed southeast toward Omaha and Lincoln.  Later that evening and overnight, thunderstorms developed farther northwest of the front aided by an upper level disturbance and increasing low level jet.  Outflow from many of the storms in the late afternoon and evening produced swirling dust devils that prompted several reports of tornadoes.  However, most if not all of the tornado reports with this event were likely non-tornadic.  However, some of the storms did produce damaging winds through mid evening.  Later that evening and overnight the storms produced marginally severe hail and locally heavy rain.

Hail in SEWARD, NEBRASKA
From 23-MAY-12 17:36:00 to 23-MAY-12 17:36:00 (CST-6)
Location: UTICA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in BUTLER, NEBRASKA
From 23-MAY-12 18:06:00 to 23-MAY-12 18:06:00 (CST-6)
Location: DAVID CITY ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BUTLER, NEBRASKA
From 23-MAY-12 18:00:00 to 23-MAY-12 18:00:00 (CST-6)
Location: DWIGHT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BUTLER, NEBRASKA
From 23-MAY-12 18:10:00 to 23-MAY-12 18:16:00 (CST-6)
Location: DWIGHT
Magnitude: 1.50 
Reported by: Storm Chaser

Hail up to 1.5 inches in diameter fell for several minutes southeast through northeast of Dwight.

Thunderstorm Wind in BUTLER, NEBRASKA
From 23-MAY-12 18:10:00 to 23-MAY-12 18:10:00 (CST-6)
Location: DWIGHT
Magnitude: 55.00 EG
Reported by: Emergency Manager

Thunderstorm winds estimated at over 60 mph downed trees and power lines near county roads 21, P and U southeast of Dwight.   The winds were accompanied by hail that reached up to 1.5 inches in diameter.

Hail in SAUNDERS, NEBRASKA
From 23-MAY-12 18:50:00 to 23-MAY-12 18:50:00 (CST-6)
Location: ITHACA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SAUNDERS, NEBRASKA
From 23-MAY-12 18:52:00 to 23-MAY-12 18:52:00 (CST-6)
Location: MEAD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in DOUGLAS, NEBRASKA
From 23-MAY-12 19:13:00 to 23-MAY-12 19:13:00 (CST-6)
Location: VALLEY
Magnitude: 52.00 MG
Reported by: Official NWS Observations

Thunderstorm wind gusts were measured at 60 mph at the NWS office just northwest of Valley.  The winds were accompanied by hail that reached up to golf ball-size.

Hail in DOUGLAS, NEBRASKA
From 23-MAY-12 19:21:00 to 23-MAY-12 19:21:00 (CST-6)
Location: VALLEY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

From the same storm that hit the NWS office a few minutes earlier.

Hail in PIERCE, NEBRASKA
From 23-MAY-12 20:47:00 to 23-MAY-12 20:47:00 (CST-6)
Location: OSMOND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in DODGE, NEBRASKA
From 23-MAY-12 16:30:00 to 23-MAY-12 16:30:00 (CST-6)
Location: WEBSTER
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in SAUNDERS, NEBRASKA
From 23-MAY-12 18:48:00 to 23-MAY-12 18:48:00 (CST-6)
Location: WAHOO
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm wind gusts which peaked at a measured 68 mph at the Wahoo airport, were accompanied by nickel-size hail.

Hail in DOUGLAS, NEBRASKA
From 23-MAY-12 19:12:00 to 23-MAY-12 19:12:00 (CST-6)
Location: VALLEY
Magnitude: 1.75 
Reported by: Official NWS Observations

Hail up to golf ball-size fell at the NWS office just northwest of Valley.  The hail was accompanied by thunderstorm wind gusts that were measured at 60 mph.  Although most hailstones were an inch to an inch and half in diameter, the wind-driven hail caused vehicle damage at the office and likely at surrounding sites as well.

Hail in SAUNDERS, NEBRASKA
From 23-MAY-12 18:46:00 to 23-MAY-12 18:49:00 (CST-6)
Location: WAHOO
Magnitude: 0.88 
Reported by: Trained Spotter

The hail was accompanied by thunderstorm wind gusts which reached 68 mph at the Wahoo airport.