A broad area of low pressure was situated across much of Nebraska and Kansas during the morning hours and slowly made its way east, northeast through the day.  Much of Iowa was in the warm sector throughout the day, resulting in modest temperatures into the mid and upper 70s and dew points to the low 60s.  Thermodynamic soundings were not substantial, confirming elevated threat with a sizable cap and MUCAPE values in the 1000-1500 range.  As a result, generally isolated to local convection was seen with nearly all severe reports of the hail variety.

Hail in CERRO GORDO, IOWA
From 09-APR-17 21:30:00 to 09-APR-17 21:30:00 (CST-6)
Location: HANFORD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported up to half dollar sized hail.  This is a delayed report.

Hail in CLARKE, IOWA
From 09-APR-17 22:59:00 to 09-APR-17 22:59:00 (CST-6)
Location: WOODBURN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported up to quarter sized hail. This is a delayed report.

Hail in CERRO GORDO, IOWA
From 09-APR-17 20:14:00 to 09-APR-17 20:14:00 (CST-6)
Location: CLEAR LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported hail ranging from dime to quarters in size.

Hail in WORTH, IOWA
From 09-APR-17 20:35:00 to 09-APR-17 20:35:00 (CST-6)
Location: MANLY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Local fire department employee reported up to quarter sized hail 2 N of Plymouth.

Hail in MARION, IOWA
From 09-APR-17 23:30:00 to 09-APR-17 23:30:00 (CST-6)
Location: ATTICA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported up to quarter sized hail.

Hail in MARION, IOWA
From 09-APR-17 23:31:00 to 09-APR-17 23:31:00 (CST-6)
Location: PERSHING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported up to quarter sized hail.

Hail in WORTH, IOWA
From 09-APR-17 20:27:00 to 09-APR-17 20:27:00 (CST-6)
Location: MANLY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager relayed reports of quarter sized hail just south of Manly on Highway 65.

Hail in MARION, IOWA
From 09-APR-17 23:31:00 to 09-APR-17 23:31:00 (CST-6)
Location: KNOXVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported quarter sized hail.

Hail in MARION, IOWA
From 09-APR-17 23:32:00 to 09-APR-17 23:32:00 (CST-6)
Location: FLAGLER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported half dollar sized hail.

Hail in MARION, IOWA
From 09-APR-17 23:35:00 to 09-APR-17 23:35:00 (CST-6)
Location: PELLA MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported quarter sized hail measured at Red Rock Dam at 535z.  This report is a delayed report and came from KCCI social media.

Hail in MAHASKA, IOWA
From 10-APR-17 00:02:00 to 10-APR-17 00:02:00 (CST-6)
Location: NEW SHARON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public report of half dollar sized hail via KCCI on social media.

Hail in WEBSTER, IOWA
From 09-APR-17 19:18:00 to 09-APR-17 19:18:00 (CST-6)
Location: BADGER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported up to nickel sized hail as the storm quickly developed. Hail was very brief.

Hail in WEBSTER, IOWA
From 09-APR-17 19:20:00 to 09-APR-17 19:20:00 (CST-6)
Location: (FOD)FT DODGE MUNI A
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported half dollar sized hail. This is a delayed report.

Hail in CERRO GORDO, IOWA
From 09-APR-17 20:04:00 to 09-APR-17 20:04:00 (CST-6)
Location: CLEAR LAKE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Emergency manager relayed a report of nickel sized hail in Clear Lake.

Hail in HANCOCK, IOWA
From 09-APR-17 20:05:00 to 09-APR-17 20:05:00 (CST-6)
Location: KLEMME
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported mostly quarter sized hail with a few stones slightly larger.

Hail in WORTH, IOWA
From 09-APR-17 20:25:00 to 09-APR-17 20:25:00 (CST-6)
Location: NORTHWOOD MUNI ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported dime to nickel sized hail.

Hail in WORTH, IOWA
From 09-APR-17 20:40:00 to 09-APR-17 20:40:00 (CST-6)
Location: GRAFTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained storm spotter reported mostly quarter sized hail with a couple of stones measuring up to an inch and a half.

Hail in CERRO GORDO, IOWA
From 09-APR-17 20:45:00 to 09-APR-17 20:45:00 (CST-6)
Location: MASON CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported nickel to quarter sized hail ongoing in the Mason City area.

Hail in TAYLOR, IOWA
From 09-APR-17 22:07:00 to 09-APR-17 22:07:00 (CST-6)
Location: BEDFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported quarter sized hail.  This is a delayed report.

Hail in CERRO GORDO, IOWA
From 09-APR-17 20:14:00 to 09-APR-17 20:16:00 (CST-6)
Location: VENTURA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported lots of hail over the last few minutes and ongoing up to quarters in size.

Hail in CERRO GORDO, IOWA
From 09-APR-17 20:52:00 to 09-APR-17 20:52:00 (CST-6)
Location: MASON CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter sized hail. Time estimated by radar and report from social media.

Thunderstorm Wind in RINGGOLD, IOWA
From 09-APR-17 22:50:00 to 09-APR-17 22:50:00 (CST-6)
Location: KELLERTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported trees down on a vehicle along with roof and building damage. This is a delayed report.

Hail in MARION, IOWA
From 09-APR-17 23:33:00 to 09-APR-17 23:33:00 (CST-6)
Location: FLAGLER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported up to half dollar sized hail.

Hail in MARION, IOWA
From 09-APR-17 23:20:00 to 09-APR-17 23:20:00 (CST-6)
Location: MELCHER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported quarter sized hail.