A boundary lifting north through Iowa was the focus for convection and tornado development.  Sufficient instability and enhanced shear near the boundary helped produce seven tornadoes on this day.  One tornado occurred in Waukee, Iowa but produced only EF0 damage.  The strongest tornado was an EF1 located south of Eagle Grove reaching a width of almost 250 yards.

Tornado in DALLAS, IOWA
From 26-MAY-20 12:18:00 to 26-MAY-20 12:20:00 (CST-6)
Location: WAUKEE
Tornado F-scale: EF0
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado developed on the north edge of downtown Waukee and moved northwest, causing minor damage at a church and car dealership.  The tornado also removed some shingles and roofing to a new house that was still under construction.

Tornado in DALLAS, IOWA
From 26-MAY-20 12:28:00 to 26-MAY-20 12:31:00 (CST-6)
Location: SHULER MINE
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Numerous videos on social media captured the tornado in rural areas between Waukee and Dallas Center.  The tornado impacted no damage indicators, therefore the EFU rating.

Tornado in WRIGHT, IOWA
From 26-MAY-20 14:38:00 to 26-MAY-20 14:44:00 (CST-6)
Location: WOOLSTOCK
Tornado F-scale: EF1
Property damage: 70.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tornado developed just north of the Wright County/Hamilton County line and moved north. Significant tree damage occurred along the path and a large machine shed was destroyed.

Tornado in GUTHRIE, IOWA
From 26-MAY-20 14:53:00 to 26-MAY-20 14:58:00 (CST-6)
Location: ADAIR
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm Chaser observed a tornado north of Adair in rural Guthrie county.  The tornado had an intermittent path with no damage indicators impacted, therefore the EFU rating.

Tornado in GUTHRIE, IOWA
From 26-MAY-20 15:16:00 to 26-MAY-20 15:17:00 (CST-6)
Location: NORTH BRANCH
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm Chasers captured a brief tornado in western Guthrie county.  The tornado was in a rural location with no damage indicators impacted, therefore the EFU rating.

Funnel Cloud in DALLAS, IOWA
From 26-MAY-20 12:26:00 to 26-MAY-20 12:26:00 (CST-6)
Location: SHULER MINE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported apparent funnel cloud.

Thunderstorm Wind in CERRO GORDO, IOWA
From 26-MAY-20 17:10:00 to 26-MAY-20 17:10:00 (CST-6)
Location: BURCHINAL
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Public report of roof damage to a barn provided via social media.

Tornado in BOONE, IOWA
From 26-MAY-20 13:04:00 to 26-MAY-20 13:05:00 (CST-6)
Location: BERKLEY
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A storm chaser caught a brief tornado in rural Boone county.  The tornado did not impact any damage indicators, hence the EFU rating.

Tornado in BOONE, IOWA
From 26-MAY-20 13:22:00 to 26-MAY-20 13:23:00 (CST-6)
Location: OGDEN
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser observed a very brief tornado between Boone and Ogden south of Highway 30.  The tornado did not impact any damage indicators, hence the EFU rating.