Summary of 4/11/01 event: (For additional details, see individual reports for the date.)Strong surface low pressure lifted from western Kansas into Minnesota during the event.  A trailing dryline also moved eastward across Iowa.  Additionally, dewpoints in the mid 60s, and extreme wind shear made the environment ripe for rotating supercells. Tornado watches issued by the Storm Prediction Center highlighted the "particularly dangerous" nature of the situation.  Numerous funnel clouds and tornados occurred during the event across eastern Iowa.  Most of the tornadic activity involved brief touchdowns of F0 tornados.  Houses, outbuildings, and trees sustained damage throughout the area, but there were no injuries reported during the event.  There were also isolated reported of small pea size hail, and 50 to 55 mph winds in extreme northwest Illinois.

Tornado in BENTON, IOWA
From 11-APR-01 16:20:00 to 11-APR-01 16:21:00 (CST)
Location: MT AUBURN
Tornado F-scale: F0
Property damage: 18K
Reported by: EMERGENCY MANAGER

Law enforcement reported a brief tornado touchdown at a farm south of Mt. Auburn.  The F0 tornado downed large pine and maple trees, and destroyed a barn.  There were no injuries.

Tornado in KEOKUK, IOWA
From 11-APR-01 15:25:00 to 11-APR-01 15:30:00 (CST)
Location: KINROSS
Tornado F-scale: F0
Property damage: 90K
Reported by: NWS STORM SURVEY

An F0 tornado tracked from southwest of Kinross into the community.  The public also reported several funnel clouds near the tornado.  The tornado damaged farm out buildings.  In Kinross, several house were damaged significantly, and many others had roof and siding damage. A shed housing two cars was also destroyed. There was substantial damage to trees and an orchard in the town.  There were no injuries.

Tornado in JOHNSON, IOWA
From 11-APR-01 16:00:00 to 11-APR-01 16:05:00 (CST)
Location: OXFORD
Tornado F-scale: F0
Property damage: 25K
Reported by: NEWSPAPER

An F0 tornado moved across rural areas south of Oxford, and destroyed a barn and a garage at two farms.  There were no injuries.

Tornado in JOHNSON, IOWA
From 11-APR-01 16:20:00 to 11-APR-01 16:21:00 (CST)
Location: SWISHER
Tornado F-scale: F0
Reported by: EMERGENCY MANAGER

An F0 tornado touched down briefly in Swisher.  Emergency management reported no major damage, and there were no injuries.

Tornado in JOHNSON, IOWA
From 11-APR-01 16:02:00 to 11-APR-01 16:03:00 (CST)
Location: TIFFIN
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

Law enforcement reported a brief tornado touchdown in Tiffin.  No damage resulted from the F0 tornado, and there were no injuries.

Tornado in LINN, IOWA
From 11-APR-01 16:20:00 to 11-APR-01 16:21:00 (CST)
Location: CEDAR RAPIDS
Tornado F-scale: F0
Reported by: EMERGENCY MANAGER

Emergency management reported a brief tornado touchdown in southeast Cedar Rapids near Kirkwood Community College.  There were no injuries and no damage reported.  The F0 tornado was observed sucking water from roof tops near the FAA control tower at the Cedar Rapids Airport.

Tornado in IOWA, IOWA
From 11-APR-01 15:40:00 to 11-APR-01 15:41:00 (CST)
Location: PARNELL
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A trained storm spotter reported a brief tornado touchdown along county road F52 between Parnell and Holbrook.  Only minor damage to vegetation was observed.  There were no injuries.

Tornado in WASHINGTON, IOWA
From 11-APR-01 15:50:00 to 11-APR-01 15:53:00 (CST)
Location: KALONA
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A trained storm spotter reported a brief tornado touchdown near Kalona.  There were no injuries or damage.