The setup over Iowa was primed for a heavy rainfall event for a few reasons, including persistent SW 500 mb flow, a strong and SW oriented 850 mb jet, strong low level moisture transport, and elevated CAPE around 1000-2000 J/kg. Precipitable water values, given the strong moisture transport into the area, rose into the neighborhood of 1.7 inches throughout the event as well. While effective bulk shear values were supportive of organized convection, that generally did not come to fruition given the widespread lifting with persistent low level warm air/theta-e advection and 850 mb jet into the region. As a result, the vast majority of reports and general consequences revolved around heavy rainfall and flooding, including a number of road closures. A couple severe wind gusts and damage reports were received in addition to the water issues.

Heavy Rain in CASS, IOWA
From 23-MAY-19 05:57:00 to 24-MAY-19 05:57:00 (CST-6)
Location: MASSENA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.60 inches over the last 24 hours.

Heavy Rain in BOONE, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: LUTHER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.19 inches over the last 24 hours.

Heavy Rain in CRAWFORD, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: SCHLESWIG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.14 inches over the last 24 hours.

Heavy Rain in DALLAS, IOWA
From 23-MAY-19 07:00:00 to 24-MAY-19 07:00:00 (CST-6)
Location: ADEL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.52 inches.

Heavy Rain in DALLAS, IOWA
From 23-MAY-19 07:00:00 to 24-MAY-19 07:00:00 (CST-6)
Location: PERRY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.36 inches over the last 24 hours.

Heavy Rain in POLK, IOWA
From 23-MAY-19 07:00:00 to 24-MAY-19 07:00:00 (CST-6)
Location: DODGE FLD ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.82 inches over the last 24 hours.

Heavy Rain in ADAMS, IOWA
From 23-MAY-19 21:00:00 to 24-MAY-19 02:58:00 (CST-6)
Location: MT ETNA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Personal weather station measured heavy rainfall of 4.22 inches. Beginning time estimated from radar.

Heavy Rain in CASS, IOWA
From 23-MAY-19 21:00:00 to 24-MAY-19 02:59:00 (CST-6)
Location: CUMBERLAND
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Personal weather station measured heavy rainfall of 4.18 inches. Beginning time estimated from radar.

Heavy Rain in CRAWFORD, IOWA
From 23-MAY-19 20:00:00 to 24-MAY-19 05:36:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 2.20 inches since 9pm last night.

Flash Flood in CASS, IOWA
From 24-MAY-19 03:24:00 to 24-MAY-19 09:15:00 (CST-6)
Location: MASSENA
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: State Official

Cass County Dispatch reported flash flooding near 740th and Rockport, and 730th and Seattle, near the West Nodaway River.

Thunderstorm Wind in JASPER, IOWA
From 24-MAY-19 06:23:00 to 24-MAY-19 06:23:00 (CST-6)
Location: METZ
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Measured via personal anemometer.

Heavy Rain in CRAWFORD, IOWA
From 23-MAY-19 20:30:00 to 24-MAY-19 06:44:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 2.20 inches. Beginning time estimated from radar.

Flood in STORY, IOWA
From 24-MAY-19 06:48:00 to 24-MAY-19 12:45:00 (CST-6)
Location: NEVADA MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported water over 610th Ave and 620th Ave.

Heavy Rain in POLK, IOWA
From 23-MAY-19 07:00:00 to 24-MAY-19 07:00:00 (CST-6)
Location: ANKENY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.45 inches over the last 24 hours.

Heavy Rain in JASPER, IOWA
From 23-MAY-19 22:30:00 to 24-MAY-19 07:46:00 (CST-6)
Location: NEWTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 2.15 inches. Beginning time estimated from radar.

Heavy Rain in POLK, IOWA
From 23-MAY-19 22:00:00 to 24-MAY-19 08:09:00 (CST-6)
Location: CLOVER HILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 2.48 inches. Beginning time estimated from radar.

Heavy Rain in POLK, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: ANKENY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.54 inches over the last 24 hours.

Heavy Rain in POLK, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: ELKHART
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.23 inches over the last 24 hours.

Heavy Rain in STORY, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: AMES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.28 inches over the last 24 hours.

Flash Flood in ADAIR, IOWA
From 24-MAY-19 05:25:00 to 24-MAY-19 12:15:00 (CST-6)
Location: CANBY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported gravel roads in the area under water, and creeks and streams rising fast.

Heavy Rain in MADISON, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: EARLHAM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 3.11 inches over the last 24 hours.

Heavy Rain in POLK, IOWA
From 23-MAY-19 22:00:00 to 24-MAY-19 08:13:00 (CST-6)
Location: URBANDALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Who TV meteorologist reported heavy rainfall of 2.85 inches. Beginning time estimated from radar.

Heavy Rain in POLK, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: SAYLORVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 3.12 inches over the last 24 hours.

Heavy Rain in POLK, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: POLK CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

CoCoRaHS observer recorded heavy rainfall of 2.45 inches over the last 24 hours.

Heavy Rain in POLK, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: DES MOINES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.00 inches over the last 24 hours.

Heavy Rain in POLK, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: LOVINGTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.24 inches over the last 24 hours.

Heavy Rain in STORY, IOWA
From 23-MAY-19 22:00:00 to 24-MAY-19 08:29:00 (CST-6)
Location: AMES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 2.25 inches. Beginning time estimated from radar.

Flood in STORY, IOWA
From 23-MAY-19 07:19:00 to 24-MAY-19 12:45:00 (CST-6)
Location: COLO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported water over the road at Hwy 65 and 190th Street via a submitted video.

Heavy Rain in DALLAS, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: REDFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.43 inches over the last 24 hours.

Heavy Rain in DALLAS, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: SHULER MINE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 3.06 inches over the last 24 hours.

Heavy Rain in DALLAS, IOWA
From 23-MAY-19 06:00:00 to 24-MAY-19 06:00:00 (CST-6)
Location: DALLAS CENTER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.12 inches over the last 24 hours.

Flood in STORY, IOWA
From 23-MAY-19 07:19:00 to 24-MAY-19 12:45:00 (CST-6)
Location: ONTARIO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported water over 500th Ave, north of Ontario Street.

Flash Flood in CASS, IOWA
From 24-MAY-19 05:10:00 to 24-MAY-19 09:15:00 (CST-6)
Location: MASSENA
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quick rises have happened along the West Nodaway River in Cass County. Evacuations along the West Nodaway River are being recommended to nearby residents.

Flood in STORY, IOWA
From 24-MAY-19 06:46:00 to 24-MAY-19 12:45:00 (CST-6)
Location: AMES
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported several locations in Ames have water over the road, including East Lincoln Way, Grand Ave, and Airport Road.

Flood in STORY, IOWA
From 24-MAY-19 06:48:00 to 24-MAY-19 12:45:00 (CST-6)
Location: COLO
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Emergency manager relayed Iowa DOT report of water over the road at Highway 65 and 190th Street in Story County.