A relatively routine setup for thunderstorms was seen across Iowa with much of the state in the warm sector ahead of an impending frontal passage. Supporting factors were relatively lacking though including effective bulk shear under 30 kts, fairly high lifted condensation levels, and a lack of instability within hail growth areas, to name a few. As a result, primarily unorganized thunderstorms developed during the late afternoon and early evening hours. A handful of storms were able to provide strong updrafts in the roughly 2000 to 3000 J/kg MUCAPE environment with brief periods of sub-severe to severe hail.

Hail in BOONE, IOWA
From 01-AUG-18 19:35:00 to 01-AUG-18 19:35:00 (CST-6)
Location: BOONE MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A retired NWS employee reported quarter sized hail. This is a delayed report.

Hail in WEBSTER, IOWA
From 01-AUG-18 17:10:00 to 01-AUG-18 17:10:00 (CST-6)
Location: KALO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported nickel sized hail. This is a delayed report.

Hail in WEBSTER, IOWA
From 01-AUG-18 17:15:00 to 01-AUG-18 17:15:00 (CST-6)
Location: KALO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail. This is a delayed report.

Hail in WEBSTER, IOWA
From 01-AUG-18 17:20:00 to 01-AUG-18 17:20:00 (CST-6)
Location: BRUSHY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported penny sized hail.

Hail in CARROLL, IOWA
From 01-AUG-18 17:46:00 to 01-AUG-18 17:46:00 (CST-6)
Location: CARROLLTON
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported up to golf ball sized hail, including damage to the top of his truck.

Hail in WEBSTER, IOWA
From 01-AUG-18 17:21:00 to 01-AUG-18 17:21:00 (CST-6)
Location: DUNCOMBE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail. This is a delayed report.

Hail in CARROLL, IOWA
From 01-AUG-18 17:41:00 to 01-AUG-18 17:41:00 (CST-6)
Location: CARROLLTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail. This is a delayed report.

Hail in HAMILTON, IOWA
From 01-AUG-18 17:41:00 to 01-AUG-18 17:41:00 (CST-6)
Location: WILLIAMS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported penny sized hail. This is a delayed report.

Hail in HAMILTON, IOWA
From 01-AUG-18 17:45:00 to 01-AUG-18 17:45:00 (CST-6)
Location: HOMER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail. This is a delayed report.

Hail in GREENE, IOWA
From 01-AUG-18 17:51:00 to 01-AUG-18 17:51:00 (CST-6)
Location: SCRANTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Media reported quarter sized hail, via social media.

Hail in HARDIN, IOWA
From 01-AUG-18 17:54:00 to 01-AUG-18 17:54:00 (CST-6)
Location: IOWA FALLS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported nickel sized hail.

Hail in BOONE, IOWA
From 01-AUG-18 18:39:00 to 01-AUG-18 18:39:00 (CST-6)
Location: MOINGONA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail.

Hail in STORY, IOWA
From 01-AUG-18 19:05:00 to 01-AUG-18 19:05:00 (CST-6)
Location: AMES
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported nickel sized hail.

Hail in BOONE, IOWA
From 01-AUG-18 19:10:00 to 01-AUG-18 19:10:00 (CST-6)
Location: NAPIER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported nickel sized hail.