During the evening of the 25th, a number of storms were able to initiate along a relatively stationary boundary situated across southern Iowa. On the warm side of the boundary surface conditions were in the mid 80s for temperature and upper 60s to low 70s dewpoints.  Additionally, the conditions yielded an environment with 2000-3000+ J/kg SB/MUCAPE, 30-40 kts of effective bulk shear, 500-700 J/kg CAPE in the hail growth region, and precipitable water values around 1.2-1.5 inches.
Ultimately, storms developed along the boundary during the mid afternoon hours, initially producing sub-severe conditions. As the initial wave of storms moved eastward, a second wave of development occured during the evening, of which the storms were better able to organize and produce numerous reports of quarter to larger than golf ball sized hail. A few storms were also able to produce damaging winds as they too progressed eastward.  The second wave of storms were aided by the low level jet, initiating a series of training storms over portions of southwest and south central Iowa where copious rainfall produced a small handful of flash flood reports.

Hail in WAYNE, IOWA
From 25-JUN-19 18:06:00 to 25-JUN-19 18:06:00 (CST-6)
Location: LINEVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail.

Hail in CLARKE, IOWA
From 25-JUN-19 19:40:00 to 25-JUN-19 19:40:00 (CST-6)
Location: MURRAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported sporadic quarter sized hail mixed with heavy rain, and still ongoing at the time of the report.

Hail in ADAIR, IOWA
From 26-JUN-19 00:20:00 to 26-JUN-19 00:20:00 (CST-6)
Location: BRIDGEWATER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported heavy amounts of dime to nickel sized hail with occasional quarter to half dollar sized hail.

Hail in DECATUR, IOWA
From 25-JUN-19 16:30:00 to 25-JUN-19 16:30:00 (CST-6)
Location: VAN WERT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 200.00K
Reported by: Trained Spotter

Trained spotter reported lots of quarter sized hail with a few to half dollar in size. Significant crop damage was noted to the north of this location with corn and bean fields decimated. Hail size that did damage to the fields was unknown.

Hail in CLARKE, IOWA
From 25-JUN-19 16:15:00 to 25-JUN-19 16:15:00 (CST-6)
Location: LACELLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail. This is a delayed report.

Hail in DECATUR, IOWA
From 25-JUN-19 16:35:00 to 25-JUN-19 16:35:00 (CST-6)
Location: VAN WERT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 150.00K
Reported by: Emergency Manager

Emergency manager reported swaths of stripped crops at the Clarke/Decatur county line. This is a delayed report and time estimated from radar.

Hail in ADAMS, IOWA
From 25-JUN-19 16:40:00 to 25-JUN-19 16:40:00 (CST-6)
Location: NEVINVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail via social media.

Hail in UNION, IOWA
From 25-JUN-19 16:50:00 to 25-JUN-19 16:50:00 (CST-6)
Location: CRESTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Dispatch relayed report of nickel to quarter sized hail. This is a delayed report.

Hail in WAYNE, IOWA
From 25-JUN-19 16:55:00 to 25-JUN-19 16:55:00 (CST-6)
Location: HUMESTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter sized hail.

Hail in WAYNE, IOWA
From 25-JUN-19 17:00:00 to 25-JUN-19 17:00:00 (CST-6)
Location: HUMESTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail. This is a delayed report.

Hail in LUCAS, IOWA
From 25-JUN-19 17:15:00 to 25-JUN-19 17:15:00 (CST-6)
Location: RUSSELL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail.

Hail in CLARKE, IOWA
From 25-JUN-19 19:40:00 to 25-JUN-19 19:40:00 (CST-6)
Location: OSCEOLA MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter sized hail, relayed via local media.

Hail in CLARKE, IOWA
From 25-JUN-19 19:52:00 to 25-JUN-19 19:52:00 (CST-6)
Location: MURRAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail.

Thunderstorm Wind in DAVIS, IOWA
From 25-JUN-19 17:32:00 to 25-JUN-19 17:32:00 (CST-6)
Location: WEST GROVE
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported tree down on power line in West Grove. This is a delayed report and time estimated from radar.

Thunderstorm Wind in DECATUR, IOWA
From 25-JUN-19 17:32:00 to 25-JUN-19 17:32:00 (CST-6)
Location: LAMONI
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a tree down on a power line in Lamoni. Time estimated from radar.

Hail in CLARKE, IOWA
From 25-JUN-19 19:56:00 to 25-JUN-19 19:56:00 (CST-6)
Location: MURRAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported quarter sized hail in Murray.

Hail in ADAMS, IOWA
From 25-JUN-19 20:35:00 to 25-JUN-19 20:35:00 (CST-6)
Location: STRINGTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter sized hail.

Hail in TAYLOR, IOWA
From 25-JUN-19 21:07:00 to 25-JUN-19 21:07:00 (CST-6)
Location: LENOX
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter sized hail.

Hail in ADAIR, IOWA
From 26-JUN-19 00:11:00 to 26-JUN-19 00:11:00 (CST-6)
Location: BRIDGEWATER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported quarter sized hail.

Hail in DECATUR, IOWA
From 25-JUN-19 16:37:00 to 25-JUN-19 16:37:00 (CST-6)
Location: LE ROY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 20.00K
Reported by: Emergency Manager

Emergency manager reported quarter sized hail and small limb damage. This is a delayed report and time estimated from radar.

Hail in CLARKE, IOWA
From 25-JUN-19 16:45:00 to 25-JUN-19 16:45:00 (CST-6)
Location: WELDON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail and minor crop damage.

Hail in APPANOOSE, IOWA
From 25-JUN-19 17:02:00 to 25-JUN-19 17:02:00 (CST-6)
Location: GRIFFINSVILLE
Magnitude: 1.75 
Property damage: 2.00K
Crop damage: 10.00K
Reported by: Other Federal Agency

Corps of Engineers reported golf ball sized hail to dispatch.

Hail in APPANOOSE, IOWA
From 25-JUN-19 17:05:00 to 25-JUN-19 17:05:00 (CST-6)
Location: MAINE
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail and damage to their vehicle.

Thunderstorm Wind in APPANOOSE, IOWA
From 25-JUN-19 17:20:00 to 25-JUN-19 17:20:00 (CST-6)
Location: SHARON
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down blocking one lane of Highway 2.

Hail in APPANOOSE, IOWA
From 25-JUN-19 17:52:00 to 25-JUN-19 17:52:00 (CST-6)
Location: THIRTY
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Public reported half dollar sized hail.

Hail in APPANOOSE, IOWA
From 25-JUN-19 17:50:00 to 25-JUN-19 17:55:00 (CST-6)
Location: CENTERVILLE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported golf ball sized hail fell for several minutes before becoming smaller in size. A severe weather spotter reported small branches snapped at the same time as the hail.

Hail in ADAMS, IOWA
From 25-JUN-19 19:57:00 to 25-JUN-19 19:57:00 (CST-6)
Location: PRESCOTT
Magnitude: 1.75 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported golf ball sized hail.

Hail in CLARKE, IOWA
From 25-JUN-19 19:52:00 to 25-JUN-19 19:52:00 (CST-6)
Location: MURRAY
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported that hail had increased to golf ball in size. They also indicated that some even larger may have started to fall.

Hail in CLARKE, IOWA
From 25-JUN-19 19:55:00 to 25-JUN-19 19:55:00 (CST-6)
Location: MURRAY
Magnitude: 2.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported a mix of quarter to larger than golf ball sized hail.

Hail in UNION, IOWA
From 25-JUN-19 20:25:00 to 25-JUN-19 20:25:00 (CST-6)
Location: KENT
Magnitude: 2.00 
Property damage: 5.00K
Crop damage: 50.00K
Reported by: Trained Spotter

Trained spotter reported hail slightly larger than golf balls, as well as damage to flowers and crops.

Hail in ADAMS, IOWA
From 25-JUN-19 23:08:00 to 25-JUN-19 23:08:00 (CST-6)
Location: CARL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported hand full of hail of various sizes including several quarter sized pieces.

Flash Flood in UNION, IOWA
From 25-JUN-19 23:41:00 to 26-JUN-19 05:15:00 (CST-6)
Location: KENT
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported Highway 34 closed in both directions at Kent Corner due to water over the road.

Flash Flood in ADAMS, IOWA
From 25-JUN-19 23:34:00 to 26-JUN-19 04:00:00 (CST-6)
Location: PRESCOTT
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported water over several roads near Prescott.

Flash Flood in ADAMS, IOWA
From 26-JUN-19 00:32:00 to 26-JUN-19 05:15:00 (CST-6)
Location: STRINGTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported Highway 34 closed due to flooding over the road between County Road N64 and Iowa 25, 4 miles west of the Cromwell area.