A cold front moved across Iowa during the day and evening of the 22nd, producing storms capable of damaging winds and severe hail.  The environment at the time was fairly unstable with 100 mb MLCAPE values in excess of 1000-1500 J/kg and decent effective bulk shear values around 40 kts along the cold front.  While a number of storms initiated along and ahead of the frontal boundary, two areas were able to produce severe storms.  The first of which traversed Butler County with damaging winds and quarter sized hail and the second through parts of Polk and Marion counties producing primarily damaging winds and heavy rainfall.

Hail in BUTLER, IOWA
From 22-JUN-17 20:10:00 to 22-JUN-17 20:10:00 (CST-6)
Location: BRISTOW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail.

Hail in BUTLER, IOWA
From 22-JUN-17 20:03:00 to 22-JUN-17 20:03:00 (CST-6)
Location: DUMONT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported dime to nickel sized hail just north of Dumont.  This is a delayed report and time estimated from radar.

Hail in BUTLER, IOWA
From 22-JUN-17 20:15:00 to 22-JUN-17 20:15:00 (CST-6)
Location: ALLISON MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail.

Heavy Rain in POLK, IOWA
From 22-JUN-17 21:30:00 to 22-JUN-17 23:30:00 (CST-6)
Location: FT DES MOINES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.10 inches.

Thunderstorm Wind in BUTLER, IOWA
From 22-JUN-17 20:07:00 to 22-JUN-17 20:07:00 (CST-6)
Location: BRISTOW
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported a large tree down across the road.  The is a delayed report from the Butler County EM and time estimated from radar.

Thunderstorm Wind in POLK, IOWA
From 22-JUN-17 21:07:00 to 22-JUN-17 21:07:00 (CST-6)
Location: POLK CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported an 18 diameter tree branch down near the sports complex.  This is a delayed report and time estimated from radar.

Thunderstorm Wind in BUTLER, IOWA
From 22-JUN-17 19:51:00 to 22-JUN-17 20:14:00 (CST-6)
Location: AREDALE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 100.00K
Reported by: Emergency Manager

Emergency manager reported a nearly 2 mile wide path of shredded corn and beans from wind-driven hail.  Path extended from near Aredale to Allison in Butler county.  This is a delayed report from the Butler County EM. Time estimated from radar.

Thunderstorm Wind in MARION, IOWA
From 22-JUN-17 22:56:00 to 22-JUN-17 22:56:00 (CST-6)
Location: KNOXVILLE
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported upwards of 25 or so trees and or limbs downed onto roadways, with one on top of a passenger car.  Power lines were also down around the area and a transformer was on fire from sustained damage.

Hail in BUTLER, IOWA
From 22-JUN-17 19:59:00 to 22-JUN-17 19:59:00 (CST-6)
Location: AREDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail.