A large upper level trough of low pressure moved from the Rockies east toward the central U.S. on Saturday April 9th.  As it did, it caused a warm front to lift into eastern Nebraska and western Iowa.  Temperatures south of the front were in the 80s with dew point temperatures in the 60s.  Meanwhile, readings north of the boundary were in the 50s and 60s.  Moderate instability south of the front combined with high levels of wind shear allowed for supercell development over eastern Nebraska and southwest Iowa during the late afternoon and early evening of April 9th.  A few of the storms that were near the front turned tornadic while the other supercells were prolific hail producers, in some cases producing very large hail.

Hail in MADISON, NEBRASKA
From 09-APR-11 18:10:00 to 09-APR-11 18:10:00 (CST-6)
Location: NORFOLK SIMPSON ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BUTLER, NEBRASKA
From 09-APR-11 18:27:00 to 09-APR-11 18:27:00 (CST-6)
Location: BELLWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in COLFAX, NEBRASKA
From 09-APR-11 18:33:00 to 09-APR-11 18:33:00 (CST-6)
Location: CLARKSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in BUTLER, NEBRASKA
From 09-APR-11 18:35:00 to 09-APR-11 18:35:00 (CST-6)
Location: EDHOLM
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

South of Schuyler in far northern Butler county.

Hail in WAYNE, NEBRASKA
From 09-APR-11 18:38:00 to 09-APR-11 18:38:00 (CST-6)
Location: WINSIDE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOONE, NEBRASKA
From 09-APR-11 17:36:00 to 09-APR-11 17:36:00 (CST-6)
Location: ALBION
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail up to golf ball-size was reported about 4 miles west of Newman Grove.

Hail in MADISON, NEBRASKA
From 09-APR-11 17:38:00 to 09-APR-11 17:38:00 (CST-6)
Location: NEWMAN GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BUTLER, NEBRASKA
From 09-APR-11 18:12:00 to 09-APR-11 18:12:00 (CST-6)
Location: DAVID CITY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail up to dime-size was reported northwest of David City.

Hail in WAYNE, NEBRASKA
From 09-APR-11 18:16:00 to 09-APR-11 18:16:00 (CST-6)
Location: CARROLL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WAYNE, NEBRASKA
From 09-APR-11 19:03:00 to 09-APR-11 19:03:00 (CST-6)
Location: WAKEFIELD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MADISON, NEBRASKA
From 09-APR-11 18:16:00 to 09-APR-11 18:23:00 (CST-6)
Location: NORFOLK
Magnitude: 3.00 
Crop damage: 0.00K
Reported by: Trained Spotter

The second supercell thunderstorm that moved across Madison county during the evening produced hail up to baseball-size in the Norfolk area.  The hail caused considerable vehicle damage in town along with roof and siding damage.

Hail in MADISON, NEBRASKA
From 09-APR-11 18:13:00 to 09-APR-11 18:13:00 (CST-6)
Location: (OFK)STEFAN FLD NORF
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in CEDAR, NEBRASKA
From 09-APR-11 18:22:00 to 09-APR-11 18:28:00 (CST-6)
Location: HARTINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail up to golfball-size fell from the left mover of a supercell that split southwest of the county.  The hail was reported in and north of the Hartington area.

Hail in WAYNE, NEBRASKA
From 09-APR-11 18:21:00 to 09-APR-11 18:21:00 (CST-6)
Location: SHOLES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter