Rainfall dominated the story on the 19th and into the 20th as western Iowa found itself in a favorable setup for sustained moderate to briefly heavy rainfall.  Initially, showers and storms along a weak frontal boundary as part of a larger upper level trough. Showers continued throughout the day, especially as a more organized surface low moved towards southern Iowa out of eastern Kansas. Given the area's location in relation to the surface low, severe weather was of little concern with nominal to moderate CAPE at best and little other support for organized storms of any kind. Precipitable water values were in excess of 1.5 inches through the 19th and well into the 20th, helping produce efficient and continuous rainfall as the upper level trough and surface low slowly moved through. While truly heavy instantaneous rainfall was relatively hard to come by, the sustained light to moderate rainfall produced heavy rainfall values in excess of 4 inches in a number of locations, including values as high was 5.8 inches reported.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 21:00:00 to 20-AUG-18 17:30:00 (CST-6)
Location: DUNCOMBE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 4.75 inches.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 21:00:00 to 20-AUG-18 18:05:00 (CST-6)
Location: DAYTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 4.50 inches.

Heavy Rain in CASS, IOWA
From 19-AUG-18 17:00:00 to 20-AUG-18 04:45:00 (CST-6)
Location: ATLANTIC
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

KSOM radio reported heavy rainfall of 4.04 inches.

Heavy Rain in GREENE, IOWA
From 19-AUG-18 05:00:00 to 20-AUG-18 05:00:00 (CST-6)
Location: CHURDAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 3.55 inches over the last 24 hours.

Heavy Rain in MADISON, IOWA
From 19-AUG-18 05:02:00 to 20-AUG-18 05:02:00 (CST-6)
Location: EARLHAM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.05 inches over the last 24 hours.

Heavy Rain in RINGGOLD, IOWA
From 20-AUG-18 07:08:00 to 20-AUG-18 18:08:00 (CST-6)
Location: KELLERTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 3.90 inches over the last 11 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 18:30:00 to 20-AUG-18 18:21:00 (CST-6)
Location: CLARE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated heavy rainfall of 5.80 inches.

Heavy Rain in GREENE, IOWA
From 19-AUG-18 16:45:00 to 20-AUG-18 17:45:00 (CST-6)
Location: PATON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 4.50 inches.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 04:00:00 to 21-AUG-18 04:00:00 (CST-6)
Location: TARA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 5.72 inches over the last 48 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 05:40:00 to 20-AUG-18 05:40:00 (CST-6)
Location: LORAH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 5.38 inches over the last 24 hours.

Heavy Rain in AUDUBON, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: AUDUBON ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Audubon County Airport AWOS recorded heavy rainfall of 2.81 inches over the last 24 hours.

Heavy Rain in GREENE, IOWA
From 19-AUG-18 05:00:00 to 21-AUG-18 05:00:00 (CST-6)
Location: CHURDAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 4.68 inches over the last 48 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 05:00:00 to 21-AUG-18 05:00:00 (CST-6)
Location: FT DODGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 5.72 inches over the last 48 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 05:05:00 to 21-AUG-18 05:05:00 (CST-6)
Location: LORAH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 5.83 inches over the last 48 hours.

Heavy Rain in CALHOUN, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: ROCKWELL CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.47 inches over the last 24 hours.

Heavy Rain in CARROLL, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: CARROLL NEU ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Arthur N. Neu Airport (Carroll) AWOS recorded heavy rainfall of 2.70 inches over the last 24 hours.

Heavy Rain in CARROLL, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.00 inches over the last 24 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: MASSENA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.88 inches over the last 24 hours.

Heavy Rain in AUDUBON, IOWA
From 19-AUG-18 05:55:00 to 21-AUG-18 05:55:00 (CST-6)
Location: AUDUBON ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

CoCoRaHS observer recorded heavy rainfall of 4.09 inches over the last 48 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 05:56:00 to 21-AUG-18 05:56:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

CoCoRaHS observer recorded heavy rainfall of 5.17 inches over the last 48 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: ATLANTIC
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.15 inches over the last 24 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: ANITA MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 3.85 inches over the last 24 hours.

Heavy Rain in CALHOUN, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: ROCKWELL CITY ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

CoCoRaHS observer recorded heavy rainfall of 4.61 inches over the last 48 hours.

Heavy Rain in CARROLL, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.85 inches over the last 48 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: MASSENA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.69 inches over the last 48 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: ATLANTIC
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.67 inches over the last 48 hours.

Heavy Rain in CRAWFORD, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.69 inches over the last 24 hours.

Heavy Rain in DECATUR, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: LAMONI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.50 inches over the last 24 hours.

Heavy Rain in DECATUR, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: (30I)LAMONI MUNI ARP
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Lamoni Municipal Airport ASOS recorded heavy rainfall of 2.79 inches over the last 24 hours.

Heavy Rain in GUTHRIE, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: JAMAICA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.01 inches over the last 24 hours.

Heavy Rain in CRAWFORD, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.34 inches over the last 48 hours.

Heavy Rain in HAMILTON, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: WEBSTER CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 4.23 inches over the last 48 hours.

Heavy Rain in GUTHRIE, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: JAMAICA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.01 inches over the last 24 hours.

Heavy Rain in RINGGOLD, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: BEACONSFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.16 inches over the last 24 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: ROBERTS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 5.93 inches over the last 48 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 06:00:00 to 21-AUG-18 06:00:00 (CST-6)
Location: CLARE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 6.60 inches over the last 48 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 06:40:00 to 21-AUG-18 06:40:00 (CST-6)
Location: FT DODGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.90 inches over the last 48 hours.

Heavy Rain in AUDUBON, IOWA
From 19-AUG-18 07:00:00 to 21-AUG-18 07:00:00 (CST-6)
Location: AUDUBON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.28 inches over the last 48 hours.

Heavy Rain in TAYLOR, IOWA
From 19-AUG-18 15:00:00 to 20-AUG-18 00:00:00 (CST-6)
Location: GUSS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 3.01 inches.

Heavy Rain in UNION, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: CRESTON
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 WEBSTER, IOWA
From 19-AUG-18 21:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: MOORLAND NESLER ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 2.97 inches.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: BADGER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 2.01 inches over the last 24 hours.

Heavy Rain in GUTHRIE, IOWA
From 19-AUG-18 07:00:00 to 21-AUG-18 07:00:00 (CST-6)
Location: GUTHRIE CENTER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.00 inches over the last 48 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 11:23:00 to 21-AUG-18 11:23:00 (CST-6)
Location: GOWRIE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 4.75 inches over the last 48 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 06:16:00 to 20-AUG-18 06:16:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Fort Dodge Regional Airport AWOS recorded heavy rainfall of 2.17 inches over the last 24 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 06:22:00 to 20-AUG-18 06:22:00 (CST-6)
Location: ATLANTIC ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS observer recorded heavy rainfall of 4.40 inches over the last 24 hours.

Heavy Rain in AUDUBON, IOWA
From 19-AUG-18 06:45:00 to 20-AUG-18 06:45:00 (CST-6)
Location: AUDUBON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.10 inches over the last 24 hours.

Heavy Rain in ADAMS, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: CORNING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 4.27 inches over the last 24 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
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 GUTHRIE, IOWA
From 19-AUG-18 07:00:00 to 20-AUG-18 07:00:00 (CST-6)
Location: GUTHRIE CENTER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.55 inches over the last 24 hours.

Heavy Rain in AUDUBON, IOWA
From 19-AUG-18 17:00:00 to 20-AUG-18 07:23:00 (CST-6)
Location: HAMLIN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 4.70 inches.

Heavy Rain in MADISON, IOWA
From 19-AUG-18 17:00:00 to 20-AUG-18 05:30:00 (CST-6)
Location: WINTERSET
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 2.25 inches.

Heavy Rain in TAYLOR, IOWA
From 19-AUG-18 06:00:00 to 20-AUG-18 06:00:00 (CST-6)
Location: BEDFORD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.70 inches over the last 24 hours.

Heavy Rain in RINGGOLD, IOWA
From 19-AUG-18 10:00:00 to 20-AUG-18 10:00:00 (CST-6)
Location: MT AYR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 2.55 inches over the last 24 hours.

Heavy Rain in GREENE, IOWA
From 19-AUG-18 10:44:00 to 20-AUG-18 10:44:00 (CST-6)
Location: SCRANTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported 24 hour heavy rainfall total of 3.15 inches.

Heavy Rain in GREENE, IOWA
From 19-AUG-18 16:45:00 to 20-AUG-18 10:55:00 (CST-6)
Location: PATON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 3.75 inches.

Heavy Rain in HAMILTON, IOWA
From 19-AUG-18 22:00:00 to 20-AUG-18 11:11:00 (CST-6)
Location: STANHOPE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 2.20 inches.

Heavy Rain in CARROLL, IOWA
From 19-AUG-18 12:00:00 to 20-AUG-18 12:00:00 (CST-6)
Location: COON RAPIDS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer recorded heavy rainfall of 3.20 inches over the last 24 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 12:00:00 to 20-AUG-18 12:00:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Fort Dodge Regional Airport AWOS recorded heavy rainfall of 4.67 inches over the last 24 hours.

Heavy Rain in CASS, IOWA
From 19-AUG-18 13:00:00 to 20-AUG-18 13:00:00 (CST-6)
Location: LEWIS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station recorded heavy rainfall of 4.09 inches over the last 24 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 13:00:00 to 20-AUG-18 13:00:00 (CST-6)
Location: FT DODGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station recorded heavy rainfall of 3.12 inches over the last 24 hours.

Heavy Rain in CARROLL, IOWA
From 19-AUG-18 13:15:00 to 20-AUG-18 13:15:00 (CST-6)
Location: LANESBORO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station recorded heavy rainfall of 4.33 inches over the last 24 hours.

Heavy Rain in GREENE, IOWA
From 19-AUG-18 13:15:00 to 20-AUG-18 13:15:00 (CST-6)
Location: JEFFERSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station recorded heavy rainfall of 3.03 inches over the last 24 hours.

Heavy Rain in WEBSTER, IOWA
From 19-AUG-18 22:00:00 to 20-AUG-18 13:21:00 (CST-6)
Location: LEHIGH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 4.25 inches.

Heavy Rain in CARROLL, IOWA
From 19-AUG-18 13:30:00 to 20-AUG-18 13:30:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station recorded heavy rainfall of 5.34 inches over the last 24 hours.

Heavy Rain in CALHOUN, IOWA
From 19-AUG-18 13:45:00 to 20-AUG-18 13:45:00 (CST-6)
Location: LAKE CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station recorded heavy rainfall of 4.22 inches over the last 24 hours.

Heavy Rain in CARROLL, IOWA
From 19-AUG-18 18:00:00 to 20-AUG-18 15:38:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 5.78 inches.

Heavy Rain in WRIGHT, IOWA
From 19-AUG-18 22:00:00 to 20-AUG-18 17:15:00 (CST-6)
Location: EAGLE GROVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 5.10 inches.