A very broad area of low pressure was situated along the Nebraska-Kansas border and made little progress throughout the day of the 10th.  As a result, a primarily east-west stationary boundary was present along the Kansas-Nebraska and on eastward just south of the Iowa-Missouri border.  While a single severe report was received, the main concern was periods of moderate to heavy rainfall ensued north of the boundary in areas of central and southern Iowa.  Most reported amounts were in the 1 to 2 inch range.

Heavy Rain in ADAIR, IOWA
From 10-MAY-17 11:45:00 to 10-MAY-17 12:45:00 (CST-6)
Location: ORIENT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported a 1 hour heavy rainfall total of 1.22 inches since 12:45pm CDT.

Heavy Rain in DALLAS, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: HADDEN HILL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS Employee reported 24 hour rainfall total of 1.00 inches.

Heavy Rain in POWESHIEK, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: MONTEZUMA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.42 inches.

Heavy Rain in LUCAS, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: CHARITON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.38 inches.

Heavy Rain in MARSHALL, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: GILMAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.60 inches.

Heavy Rain in STORY, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: MIDVALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.08 inches.

Heavy Rain in POWESHIEK, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: BROOKLYN ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.44 inches.

Heavy Rain in POWESHIEK, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: GRINNELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.62 inches.

Heavy Rain in CLARKE, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: OSCEOLA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.58 inches.

Heavy Rain in APPANOOSE, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: DARBYVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.13 inches.

Heavy Rain in JASPER, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: NEWTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported 24 hour rainfall total of 1.22 inches.

Heavy Rain in POLK, IOWA
From 10-MAY-17 06:00:00 to 11-MAY-17 06:00:00 (CST-6)
Location: (DSM)DES MOINES INTL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Official NWS observation of 1.54 inches over the last 24 hours.

Hail in ADAIR, IOWA
From 10-MAY-17 10:41:00 to 10-MAY-17 10:41:00 (CST-6)
Location: ORIENT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail via social media.

Heavy Rain in CRAWFORD, IOWA
From 10-MAY-17 01:00:00 to 10-MAY-17 10:00:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 1.03 inches.

Lightning in DALLAS, IOWA
From 10-MAY-17 07:50:00 to 10-MAY-17 07:50:00 (CST-6)
Location: HADDEN HILL
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS employee reported that a neighbors house was hit by lightning.  Also reported by local news stations.