Event summary for 5/10/01:Scattered strong to severe thunderstorms developed over Central Iowa during the afternoon ahead of a slow moving cold front.  The thunderstorms continued to develop and increase in coverage as they moved into Eastern Iowa during the late afternoon and evening.  The storms were aided by strong surface based instability and a strong wind maxima in the mid levels of the atmosphere.  Numerous reports of funnel clouds were received.  The thunderstorms also produced penny to golfball sized hail and strong damaging winds.  There were 3 brief tornado touchdowns.  One occurred near Aurora in Buchanan County, with the others occurring near Backbone State Park in Delaware County, and in LeClaire in Scott County.  No damage was reported with either the Buchanan or Delaware County tornadoes, however the LeClaire tornado caused widespread tree damage.  Some of the storms produced torrential rain, leading to minor flooding.

Hail in LINN, IOWA
From 10-MAY-01 17:52:00 to 10-MAY-01 17:52:00 (CST)
Location: FAIRFAX
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Golfball sized hail reported by trained storm spotter.

Hail in LINN, IOWA
From 10-MAY-01 17:52:00 to 10-MAY-01 17:52:00 (CST)
Location: CEDAR RAPIDS
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail reported by trained storm spotter.

Hail in BENTON, IOWA
From 10-MAY-01 17:44:00 to 10-MAY-01 17:44:00 (CST)
Location: WALFORD
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail reported by trained storm spotter.

Thunderstorm Wind in BENTON, IOWA
From 10-MAY-01 17:51:00 to 10-MAY-01 17:51:00 (CST)
Location: VINTON
Magnitude: 52 E
Reported by: TRAINED SPOTTER

60 mph wind gust estimated by trained storm spotter.

Tornado in DELAWARE, IOWA
From 10-MAY-01 16:38:00 to 10-MAY-01 16:38:00 (CST)
Location: DUNDEE
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A tornado touched down briefly just west of Backbone State Park.  No damage was reported.

Hail in CLINTON, IOWA
From 10-MAY-01 19:25:00 to 10-MAY-01 19:25:00 (CST)
Location: LOST NATION
Magnitude: 1.75 
Reported by: LAW ENFORCEMENT

Golfball sized hail reported by law enforcement.

Funnel Cloud in SCOTT, IOWA
From 10-MAY-01 19:55:00 to 10-MAY-01 19:55:00 (CST)
Location: BLUE GRASS
Reported by: TRAINED SPOTTER

Two funnel clouds reported by trained storm spotter.

Funnel Cloud in LINN, IOWA
From 10-MAY-01 18:06:00 to 10-MAY-01 18:06:00 (CST)
Location: FAIRFAX
Reported by: TRAINED SPOTTER

Reported by trained storm spotter.

Hail in LINN, IOWA
From 10-MAY-01 18:10:00 to 10-MAY-01 18:10:00 (CST)
Location: CEDAR RAPIDS
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Quarter to golfball sized hail covering the ground.  Reported by trained storm spotter.

Hail in LINN, IOWA
From 10-MAY-01 18:20:00 to 10-MAY-01 18:20:00 (CST)
Location: ALBURNETT
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail reported by trained storm spotter.

Funnel Cloud in LINN, IOWA
From 10-MAY-01 18:06:00 to 10-MAY-01 18:06:00 (CST)
Location: (CID)CEDAR RAPIDS AR
Reported by: GENERAL PUBLIC

Reported by public.

Thunderstorm Wind in SCOTT, IOWA
From 10-MAY-01 19:55:00 to 10-MAY-01 19:55:00 (CST)
Location: DAVENPORT ARPT
Magnitude: 50 M
Reported by: AWOS,ASOS,MESONET,ETC

58 mph wind gust measured by ASOS equipment.

Funnel Cloud in LINN, IOWA
From 10-MAY-01 18:25:00 to 10-MAY-01 18:25:00 (CST)
Location: MT VERNON
Reported by: TRAINED SPOTTER

Two funnel clouds reported by trained storm spotters.

Funnel Cloud in LINN, IOWA
From 10-MAY-01 18:20:00 to 10-MAY-01 18:20:00 (CST)
Location: CEDAR RAPIDS
Reported by: GENERAL PUBLIC

Reported by public.

Funnel Cloud in LINN, IOWA
From 10-MAY-01 18:25:00 to 10-MAY-01 18:25:00 (CST)
Location: PRAIRIEBURG
Reported by: TRAINED SPOTTER

Reported by trained storm spotter.

Hail in KEOKUK, IOWA
From 10-MAY-01 19:48:00 to 10-MAY-01 19:48:00 (CST)
Location: WHAT CHEER
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail reported by trained storm spotter.

Thunderstorm Wind in LINN, IOWA
From 10-MAY-01 18:35:00 to 10-MAY-01 18:35:00 (CST)
Location: PALO
Magnitude: 52 EG
Property damage: 50K
Reported by: TRAINED SPOTTER

Grain silos and a cabin were damaged.  Reported by trained storm spotters.

Flood in BENTON, IOWA
From 10-MAY-01 18:33:00 to 10-MAY-01 18:33:00 (CST)
Location: VINTON
Reported by: EMERGENCY MANAGER

Water covered portions of U.S. Highway 218.  Reported by emergency management.

Hail in IOWA, IOWA
From 10-MAY-01 17:15:00 to 10-MAY-01 17:15:00 (CST)
Location: LADORA
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Quarter sized hail reported by law enforcement.

Funnel Cloud in CLINTON, IOWA
From 10-MAY-01 19:33:00 to 10-MAY-01 19:33:00 (CST)
Location: CALAMUS
Reported by: GENERAL PUBLIC

Reported by public.

Thunderstorm Wind in CEDAR, IOWA
From 10-MAY-01 19:33:00 to 10-MAY-01 19:33:00 (CST)
Location: SPRINGDALE
Magnitude: 57 M
Reported by: TRAINED SPOTTER

65 mph wind gust measured by trained storm spotter.

Funnel Cloud in JOHNSON, IOWA
From 10-MAY-01 19:37:00 to 10-MAY-01 19:37:00 (CST)
Location: AMISH
Reported by: GENERAL PUBLIC

Reported by public.

Hail in IOWA, IOWA
From 10-MAY-01 17:15:00 to 10-MAY-01 17:15:00 (CST)
Location: MARENGO
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Quarter sized hail reported by law enforcement.

Funnel Cloud in IOWA, IOWA
From 10-MAY-01 17:24:00 to 10-MAY-01 17:24:00 (CST)
Location: LADORA
Reported by: TRAINED SPOTTER

Reported by trained storm spotter.

Hail in BUCHANAN, IOWA
From 10-MAY-01 16:10:00 to 10-MAY-01 16:10:00 (CST)
Location: HAZLETON
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Quarter sized hail stripped trees of leaves and covered the ground to a depth of 1 to 2 inches.

Funnel Cloud in JOHNSON, IOWA
From 10-MAY-01 19:04:00 to 10-MAY-01 19:04:00 (CST)
Location: IOWA CITY
Reported by: GENERAL PUBLIC

Reported by public.

Lightning in BUCHANAN, IOWA
From 10-MAY-01 16:30:00 to 10-MAY-01 16:30:00 (CST)
Location: AURORA
Property damage: 20K
Reported by: NEWSPAPER

Lightning struck a barn and sparked a fire, which destroyed the building.  No injuries occurred.  Reported by newspaper.

Hail in JOHNSON, IOWA
From 10-MAY-01 19:15:00 to 10-MAY-01 19:15:00 (CST)
Location: IOWA CITY
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Penny sized hail reported by a trained storm spotter.

Funnel Cloud in BENTON, IOWA
From 10-MAY-01 17:44:00 to 10-MAY-01 17:44:00 (CST)
Location: WALFORD
Reported by: TRAINED SPOTTER

Reported by trained storm spotter.

Hail in IOWA, IOWA
From 10-MAY-01 16:55:00 to 10-MAY-01 16:55:00 (CST)
Location: VICTOR
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Quarter sized hail reported by law enforcement.

Hail in DELAWARE, IOWA
From 10-MAY-01 17:10:00 to 10-MAY-01 17:10:00 (CST)
Location: COLESBURG
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Quarter sized hail reported by emergency management.

Tornado in BUCHANAN, IOWA
From 10-MAY-01 16:14:00 to 10-MAY-01 16:14:00 (CST)
Location: AURORA
Tornado F-scale: F0
Reported by: EMERGENCY MANAGER

A tornado touched down briefly at the west edge of Aurora.  No damage was reported.

Flood in LINN, IOWA
From 10-MAY-01 18:15:00 to 10-MAY-01 18:15:00 (CST)
Location: CEDAR RAPIDS
Reported by: TRAINED SPOTTER

1.67 inches of rain fell in just over one hour causing minor street flooding.  Reported by trained storm spotter.

Thunderstorm Wind in LINN, IOWA
From 10-MAY-01 18:39:00 to 10-MAY-01 18:39:00 (CST)
Location: TODDVILLE
Magnitude: 52 EG
Property damage: 2K
Reported by: EMERGENCY MANAGER

Numerous trees and power lines downed.  Reported by emergency management.

Funnel Cloud in JOHNSON, IOWA
From 10-MAY-01 18:43:00 to 10-MAY-01 18:43:00 (CST)
Location: CORALVILLE
Reported by: GENERAL PUBLIC

Two funnel clouds reported by public.

Hail in IOWA, IOWA
From 10-MAY-01 18:45:00 to 10-MAY-01 18:45:00 (CST)
Location: LADORA
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Penny sized hail reported by trained storm spotter.

Thunderstorm Wind in MUSCATINE, IOWA
From 10-MAY-01 19:45:00 to 10-MAY-01 19:45:00 (CST)
Location: WILTON
Magnitude: 52 EG
Property damage: 1K
Reported by: NEWSPAPER

Several large tree limbs downed.  Reported by Newspaper.

Hail in BUCHANAN, IOWA
From 10-MAY-01 16:24:00 to 10-MAY-01 16:24:00 (CST)
Location: AURORA
Magnitude: 1.00 
Reported by: EMERGENCY MANAGER

Quarter sized hail reported by emergency management.

Funnel Cloud in JOHNSON, IOWA
From 10-MAY-01 17:55:00 to 10-MAY-01 17:55:00 (CST)
Location: OXFORD
Reported by: LAW ENFORCEMENT

Reported by law enforcement.

Hail in LINN, IOWA
From 10-MAY-01 18:06:00 to 10-MAY-01 18:06:00 (CST)
Location: CEDAR RAPIDS
Magnitude: 1.75 
Property damage: 50K
Reported by: TRAINED SPOTTER

Golfball sized hail reported by trained storm spotter.  Several vehicles had either minor dents or needed extensive body work.  Reported by newspaper.

Thunderstorm Wind in JONES, IOWA
From 10-MAY-01 18:50:00 to 10-MAY-01 18:50:00 (CST)
Location: MORLEY
Magnitude: 52 E
Reported by: TRAINED SPOTTER

60 mph wind gust estimated by trained storm spotter.

Funnel Cloud in JOHNSON, IOWA
From 10-MAY-01 17:58:00 to 10-MAY-01 17:58:00 (CST)
Location: SWISHER
Reported by: LAW ENFORCEMENT

Reported by law enforcement.

Funnel Cloud in JONES, IOWA
From 10-MAY-01 18:50:00 to 10-MAY-01 18:50:00 (CST)
Location: OLIN
Reported by: TRAINED SPOTTER

Reported by trained spotter.

Funnel Cloud in JOHNSON, IOWA
From 10-MAY-01 18:57:00 to 10-MAY-01 18:57:00 (CST)
Location: TIFFIN
Reported by: GENERAL PUBLIC

Reported by public.

Flood in BENTON, IOWA
From 10-MAY-01 18:17:00 to 10-MAY-01 18:17:00 (CST)
Location: VINTON
Reported by: EMERGENCY MANAGER

Minor street flooding reported by emergency management.

Tornado in SCOTT, IOWA
From 10-MAY-01 20:18:00 to 10-MAY-01 20:23:00 (CST)
Location: LE CLAIRE
Tornado F-scale: F0
Property damage: 75K
Reported by: TRAINED SPOTTER

A tornado touched down in northwest LeClaire, Iowa and was on the ground for 5 minutes carving a one half mile path to the Mississippi River.  The tornado was on the ground about the length of Walnut Street in northern LeClaire, east to the Mississippi River across Highway 67.  Numerous trees and power lines were downed.  No injuries or fatalities occurred.