A pair of convective complexes, rolled through the state within a roughly 24 to 36 hour period. The first of which was linear in nature and started its life back in central and western Kansas during the evening of the 26th and made its way towards Iowa with the help of SW 500mb flow and a potent 850 mb low level jet. The second system originated across south central and western Nebraska and propagated eastward as a mesoscale convective systems along a relatively sharp MUCAPE gradient.
Generally speaking in both cases MUCAPE values were around 500-1500 J/kg, effective bulk shear around 30 to 50 kts, and aided by the low level jet (especially on the morning of the 27th).  Given the progressive nature of the storms, heavy rainfall and flooding was generally not seen, but a few locations were able to see around 2 inches of rainfall over the roughly 24 hour period between the main rounds of storms. The main results of the storms were multiple severe wind gust and wind damage reports, though a couple severe hail reports were also received.

Thunderstorm Wind in POLK, IOWA
From 27-MAY-19 05:54:00 to 27-MAY-19 05:54:00 (CST-6)
Location: DODGE FLD ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS employee reported heavy patio furniture blown over/across yard. This is a delayed report.

Hail in TAYLOR, IOWA
From 28-MAY-19 05:29:00 to 28-MAY-19 05:34:00 (CST-6)
Location: GUSS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer reported quarter sized hail that fell between 629 and 634 am.

Hail in RINGGOLD, IOWA
From 28-MAY-19 06:20:00 to 28-MAY-19 06:20:00 (CST-6)
Location: TINGLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported quarter sized hail.

Thunderstorm Wind in GUTHRIE, IOWA
From 28-MAY-19 05:24:00 to 28-MAY-19 05:24:00 (CST-6)
Location: CASEY
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a large tree snapped off about a foot in diameter or more.

Thunderstorm Wind in LUCAS, IOWA
From 28-MAY-19 08:59:00 to 28-MAY-19 08:59:00 (CST-6)
Location: CHARITON MUNI ARPT
Magnitude: 62.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media reported damage to an ISU research farm, including a sheet metal roof section blown off, pole barn damaged, and large grain cart pulled from the building.

Thunderstorm Wind in TAYLOR, IOWA
From 28-MAY-19 05:33:00 to 28-MAY-19 05:33:00 (CST-6)
Location: GRAVITY
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a large tree down near the intersection of Franklin Ave and 175th St northwest of Bedford. This is a delayed report and time estimated from radar.

Thunderstorm Wind in GUTHRIE, IOWA
From 28-MAY-19 05:40:00 to 28-MAY-19 05:40:00 (CST-6)
Location: MENLO
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 6 to 8 inch diameter tree branches down, including estimated 70 mph winds.

Thunderstorm Wind in MADISON, IOWA
From 28-MAY-19 05:48:00 to 28-MAY-19 05:48:00 (CST-6)
Location: EARLHAM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Local fired department reported 60 mph wind gusts.

Heavy Rain in TAYLOR, IOWA
From 27-MAY-19 06:00:00 to 28-MAY-19 06:00:00 (CST-6)
Location: BEDFORD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.74 inches.

Thunderstorm Wind in POLK, IOWA
From 27-MAY-19 06:03:00 to 27-MAY-19 06:03:00 (CST-6)
Location: DES MOINES
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported several 3 plus inch tree branches broken across the Beaverdale neighborhood. Over 2000 residents without power. This is a delayed report.

Thunderstorm Wind in CASS, IOWA
From 28-MAY-19 05:19:00 to 28-MAY-19 05:19:00 (CST-6)
Location: ANITA
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported a 61 mph wind gust from their personal weather station.

Thunderstorm Wind in ADAIR, IOWA
From 28-MAY-19 05:44:00 to 28-MAY-19 05:44:00 (CST-6)
Location: HOWE
Magnitude: 59.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported 10 to 12 inch diameter tree branches blocking the road. A large trampoline was destroyed as well.

Thunderstorm Wind in GUTHRIE, IOWA
From 28-MAY-19 05:22:00 to 28-MAY-19 05:22:00 (CST-6)
Location: CASEY
Magnitude: 59.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported 10 to 12 inch diameter tree branches down.

Thunderstorm Wind in UNION, IOWA
From 27-MAY-19 04:50:00 to 27-MAY-19 04:50:00 (CST-6)
Location: SPAULDING
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported a 62 mph wind gust on the home weather station.