A vigorous cold front produced an area of thunderstorms with numerous reports of hail up to the size of quarters, damaging winds of 60 to 70 mph, and two brief tornadoes.

Hail in JONES, IOWA
From 19-JUL-18 15:10:00 to 19-JUL-18 15:10:00 (CST-6)
Location: CENTER JCT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JONES, IOWA
From 19-JUL-18 15:45:00 to 19-JUL-18 15:45:00 (CST-6)
Location: WYOMING
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated hail stones up to the size of pennies and thunderstorm winds up to 40 MPH.

Hail in VAN BUREN, IOWA
From 19-JUL-18 17:38:00 to 19-JUL-18 17:38:00 (CST-6)
Location: LACEY KEOSAUQUA SP
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media relayed a report of hail up to the size of dimes.

Hail in LEE, IOWA
From 19-JUL-18 17:54:00 to 19-JUL-18 17:54:00 (CST-6)
Location: ARGYLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail up to the size of nickels.

Hail in LEE, IOWA
From 19-JUL-18 18:19:00 to 19-JUL-18 18:19:00 (CST-6)
Location: KEOKUK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in VAN BUREN, IOWA
From 19-JUL-18 17:34:00 to 19-JUL-18 17:34:00 (CST-6)
Location: FARMINGTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media relayed a report of numerous large oak trees down in town and the roof of a building peeled back. The time of the event was estimated using radar.

Thunderstorm Wind in LEE, IOWA
From 19-JUL-18 17:39:00 to 19-JUL-18 17:39:00 (CST-6)
Location: CROTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported numerous trees down. Time of the event was estimated using radar.

Thunderstorm Wind in LEE, IOWA
From 19-JUL-18 17:43:00 to 19-JUL-18 17:43:00 (CST-6)
Location: DONNELLSON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported numerous trees and powerlines down. Time of the event was estimated using radar.

Thunderstorm Wind in LEE, IOWA
From 19-JUL-18 18:15:00 to 19-JUL-18 18:15:00 (CST-6)
Location: MOOAR
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was a public report of several trees and large trees down at Keokuk High School. The time of the event was estimated by radar.

Thunderstorm Wind in KEOKUK, IOWA
From 19-JUL-18 16:10:00 to 19-JUL-18 16:10:00 (CST-6)
Location: HEDRICK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement estimated thunderstorm winds of at least 70 MPH.

Thunderstorm Wind in VAN BUREN, IOWA
From 19-JUL-18 17:00:00 to 19-JUL-18 17:00:00 (CST-6)
Location: KILBOURN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

NWS Storm Survey found 1 to 3 inch diameter tree branches broken and a grain bin destroyed.

Thunderstorm Wind in VAN BUREN, IOWA
From 19-JUL-18 17:00:00 to 19-JUL-18 17:00:00 (CST-6)
Location: AUSTIN PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS Storm Survey found 1 to 3 inch tree limbs down and damage to vehicles.

Tornado in VAN BUREN, IOWA
From 19-JUL-18 17:07:00 to 19-JUL-18 17:15:00 (CST-6)
Location: KILBOURN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS Storm Survey found an EF-1 tornado damaged a small farm outbuilding and tracked through a corn field and trees, finally ending and destroying a historic stone barn. The tornado was on the ground for 2.14 miles with a maximum path width of 50 yards. The peak estimated wind speed of 100 MPH.

Tornado in VAN BUREN, IOWA
From 19-JUL-18 17:09:00 to 19-JUL-18 17:11:00 (CST-6)
Location: PITTSBURG
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS Storm Survey found an EF-1 tornado touched down just north of Keosauqua destroying several large outbuildings and equipment in a lumberyard. Corn crop damage was also found along its 0.19 mile path with a maximum width of 75 yards. The estimated peak winds were 110 MPH.