A quasi-stationary boundary extended from the Texas Panhandle, across northern Missouri, into southeast Lower Michigan.  Warm air advection continued with an area of elevated thunderstorms developing during the morning hours.  The storms were pulse type severe with the severe threat being hail.  The most unstable CAPE was in the 2000 to 3000 J/kg range, with CAPE in the -10 to -30 C layer of the atmosphere around 700 J/kg.  The atmosphere was moderately sheared with 40 to 45 kts of effective shear available.  One of the storms became severe in the Corning area of Adams County.  The storm produced golf ball size hail.  The storms continued to move east and later produced hail about 1.25 inches in diameter in the Osceola area of Clarke County. As the storms continued to move east, hail around quarter size continues to fall.  The south side of Des Moines received enough hail to completely cover the ground.

Hail in POLK, IOWA
From 08-APR-15 11:30:00 to 08-APR-15 11:30:00 (CST-6)
Location: DES MOINES
Magnitude: 1.00 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in POLK, IOWA
From 08-APR-15 11:30:00 to 08-APR-15 11:30:00 (CST-6)
Location: CAPITOL HGTS
Magnitude: 1.25 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

The public reported half dollar size hail nea the Iowa State Fairgrounds.

Hail in POLK, IOWA
From 08-APR-15 11:34:00 to 08-APR-15 11:34:00 (CST-6)
Location: DES MOINES
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POLK, IOWA
From 08-APR-15 11:35:00 to 08-APR-15 11:35:00 (CST-6)
Location: DES MOINES
Magnitude: 1.00 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in POLK, IOWA
From 08-APR-15 11:35:00 to 08-APR-15 11:35:00 (CST-6)
Location: CAPITOL HGTS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in STORY, IOWA
From 08-APR-15 13:30:00 to 08-APR-15 13:30:00 (CST-6)
Location: AMES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POLK, IOWA
From 08-APR-15 11:45:00 to 08-APR-15 11:45:00 (CST-6)
Location: ALTOONA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ADAMS, IOWA
From 08-APR-15 08:17:00 to 08-APR-15 08:17:00 (CST-6)
Location: CORNING
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Quarter to golf ball size hail falling in Corning.

Hail in ADAMS, IOWA
From 08-APR-15 08:15:00 to 08-APR-15 08:15:00 (CST-6)
Location: CORNING
Magnitude: 1.00 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in CLARKE, IOWA
From 08-APR-15 09:19:00 to 08-APR-15 09:24:00 (CST-6)
Location: OSCEOLA
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large amount of hail was reported.  It was mostly small hail with a few of the larger stones up to half dollar in size.  The hail lasted 5 minutes.

Hail in POLK, IOWA
From 08-APR-15 11:23:00 to 08-APR-15 11:23:00 (CST-6)
Location: FT DES MOINES
Magnitude: 1.00 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Reported south of Fleur and Bell Ave in Des Moines.

Hail in POLK, IOWA
From 08-APR-15 11:25:00 to 08-APR-15 11:25:00 (CST-6)
Location: DES MOINES
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media