A broad, fairly unorganized surface low pressure system slid across the state on the 18th through the 19th, becoming more organized over time. In the meantime, it produced multiple rounds of showers and storms over large areas of southern and eastern Iowa, primarily resulting in heavy rainfall and sub-severe thunderstorms.  Periods of 1000-2000 J/kg MUCAPE and negligible bulk effective shear suggested a limited at best severe threat, while strong 850 mb moisture transport and precipitable water values between 1.4 and 1.6 inches pointed towards an increased heavy rainfall threat. Ultimately, heavy rainfall values prevailed and were in the 2 to 3 inch range across southern Iowa.

Heavy Rain in APPANOOSE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: NUMA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.39 inches over the last 24 hours.

Heavy Rain in WAPELLO, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: DAHLONEGA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.06 inches over the last 24 hours.

Heavy Rain in WAYNE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: GENOA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.57 inches over the last 24 hours.

Heavy Rain in APPANOOSE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: CENTERVILLE
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.

Heavy Rain in APPANOOSE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: CENTERVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.10 inches over the last 24 hours.

Heavy Rain in WAYNE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: PROMISE CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.04 inches over the last 24 hours.

Heavy Rain in APPANOOSE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: CENTERVILLE
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 APPANOOSE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: UNIONVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.61 inches over the last 24 hours.

Heavy Rain in APPANOOSE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: DARBYVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.17 inches over the last 24 hours.

Heavy Rain in APPANOOSE, IOWA
From 18-MAY-19 06:00:00 to 19-MAY-19 06:00:00 (CST-6)
Location: ICONIUM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.30 inches over the last 24 hours.

Heavy Rain in MONROE, IOWA
From 18-MAY-19 07:00:00 to 19-MAY-19 07:00:00 (CST-6)
Location: MAXON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.17 inches over the last 24 hours.