A low pressure system over Minnesota pushed a cold front through eastern Iowa and northwest Illinois during the afternoon and night of May 22, sparking some showers and thunderstorms across the region. Some of the storms were severe, producing large hail, damaging winds, and a few tornadoes.

Thunderstorm Wind in SCOTT, IOWA
From 22-MAY-11 19:45:00 to 22-MAY-11 19:45:00 (CST-6)
Location: BETTENDORF
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A 64 mph wind gust was measured 2 miles west of Riverdale, IA or in Bettendorf, IA around 845 pm CDT May 22.

Hail in SCOTT, IOWA
From 22-MAY-11 19:26:00 to 22-MAY-11 19:26:00 (CST-6)
Location: DAVENPORT ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Quarter sized hail fell at the Quad Cities National Weather Service Office at the Davenport Municipal Airport at 826 pm CDT May 22.

Thunderstorm Wind in SCOTT, IOWA
From 22-MAY-11 19:29:00 to 22-MAY-11 19:29:00 (CST-6)
Location: DAVENPORT ARPT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Wind gusts estimated to be 65 mph were observed at the Quad Cities National Weather Service Office at the Davenport Municipal Airport at 829 pm CDT May 22.

Thunderstorm Wind in SCOTT, IOWA
From 22-MAY-11 19:30:00 to 22-MAY-11 19:30:00 (CST-6)
Location: DAVENPORT ARPT
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts estimated to be 65 mph partially blew some power poles over just east of the Davenport Municipal Airport around 830 pm CDT May 22.

Thunderstorm Wind in SCOTT, IOWA
From 22-MAY-11 19:45:00 to 22-MAY-11 19:45:00 (CST-6)
Location: BETTENDORF
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winds estimated to be 60 mph blew some shopping carts around at the Target store near 53rd St and Elmore Ave in Davenport, IA around 845 pm CDT May 22.

Thunderstorm Wind in CEDAR, IOWA
From 22-MAY-11 15:20:00 to 22-MAY-11 15:20:00 (CST-6)
Location: STANWOOD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 40 to 60 mph were observed in Stanwood, IA around 420 pm CDT May 22.

Hail in BENTON, IOWA
From 22-MAY-11 13:31:00 to 22-MAY-11 13:31:00 (CST-6)
Location: BELLE PLAINE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell 1 mile south southwest of Belle Plaine, IA at 231 pm CDT May 22.

Thunderstorm Wind in MUSCATINE, IOWA
From 22-MAY-11 16:20:00 to 22-MAY-11 16:20:00 (CST-6)
Location: WEST LIBERTY
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Newspaper

Wind gusts estimated to be 70 mph destroyed a garage and caused extensive tree damage at a home near Highway 70 and 130th Street just southeast of West Liberty, IA around 520 pm CDT May 22.

Thunderstorm Wind in SCOTT, IOWA
From 22-MAY-11 16:30:00 to 22-MAY-11 16:45:00 (CST-6)
Location: DIXON
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Wind gusts estimated to be 70 mph blew down a power pole and some large trees from Dixon, IA area to just north of Long Grove, IA from about 530 pm CDT to about 545 pm CDT May 22.  A tree fell on a barn and fence destroying them.

Hail in IOWA, IOWA
From 22-MAY-11 13:58:00 to 22-MAY-11 13:58:00 (CST-6)
Location: WILLIAMSBURG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in IOWA, IOWA
From 22-MAY-11 14:00:00 to 22-MAY-11 14:00:00 (CST-6)
Location: HOLBROOK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in IOWA, IOWA
From 22-MAY-11 14:04:00 to 22-MAY-11 14:04:00 (CST-6)
Location: WILLIAMSBURG
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two inch diameter hail fell 1 mile south southwest of Williamsburg, IA at 304 pm CDT May 22.

Hail in IOWA, IOWA
From 22-MAY-11 14:00:00 to 22-MAY-11 14:15:00 (CST-6)
Location: HOMESTEAD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KEOKUK, IOWA
From 22-MAY-11 14:40:00 to 22-MAY-11 14:40:00 (CST-6)
Location: WEBSTER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar sized hail fell 1 mile south of Webster, IA at 340 pm CDT May 22.

Hail in JOHNSON, IOWA
From 22-MAY-11 14:42:00 to 22-MAY-11 14:42:00 (CST-6)
Location: NORTH LIBERTY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell 2 miles north northwest of North Liberty, IA at 342 pm CDT May 22.

Hail in LINN, IOWA
From 22-MAY-11 14:45:00 to 22-MAY-11 14:45:00 (CST-6)
Location: ELY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINN, IOWA
From 22-MAY-11 15:01:00 to 22-MAY-11 15:01:00 (CST-6)
Location: MT VERNON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in JOHNSON, IOWA
From 22-MAY-11 15:32:00 to 22-MAY-11 15:32:00 (CST-6)
Location: SOLON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Ping pong ball sized hail fell near Sutiff, IA at 423 pm CDT May 22.

Hail in JONES, IOWA
From 22-MAY-11 15:15:00 to 22-MAY-11 15:15:00 (CST-6)
Location: MORLEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in CEDAR, IOWA
From 22-MAY-11 15:17:00 to 22-MAY-11 15:17:00 (CST-6)
Location: MECHANICSVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Golf ball sized hail fell in Mechanicsville, IA at 417 pm CDT May 22.

Hail in CEDAR, IOWA
From 22-MAY-11 15:20:00 to 22-MAY-11 15:20:00 (CST-6)
Location: STANWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell in Stanwood, IA at 420 pm CDT May 22.

Hail in CEDAR, IOWA
From 22-MAY-11 15:21:00 to 22-MAY-11 15:21:00 (CST-6)
Location: STANWOOD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JONES, IOWA
From 22-MAY-11 15:24:00 to 22-MAY-11 15:24:00 (CST-6)
Location: OLIN
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Baseball sized hail fell 1 mile west southwest of Olin, IA at 424 pm CDT May 22.

Hail in JONES, IOWA
From 22-MAY-11 15:24:00 to 22-MAY-11 15:24:00 (CST-6)
Location: OLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter sized hail fell in Olin, IA at 424 pm CDT May 22.

Hail in KEOKUK, IOWA
From 22-MAY-11 16:16:00 to 22-MAY-11 16:16:00 (CST-6)
Location: SOUTH ENGLISH
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar sized hail fell in South English, IA around 516 pm CDT May 22.

Thunderstorm Wind in SCOTT, IOWA
From 22-MAY-11 19:35:00 to 22-MAY-11 19:35:00 (CST-6)
Location: DAVENPORT
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wind gusts estimated to be 65 mph blew down two light poles at a car dealership in Davenport, IA around 835 pm CDT May 22.  Secondary damage was done to some cars.

Tornado in IOWA, IOWA
From 22-MAY-11 13:54:00 to 22-MAY-11 14:00:00 (CST-6)
Location: MILLERSBURG
Tornado F-scale: EF0
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm damage survey team confirmed an EF0 tornado  track from 3 miles east of Millersburg, IA (tornado began at 254 pm) to 3 miles west of Parnell, IA (tornado ended at 3 pm). The path length was about 2 miles and the path width was about 25 yards. Power lines were blown down with tree damage noted and one shed flipped.  Based on the damage, wind speeds in the tornado were estimated at 80 mph.

Hail in JOHNSON, IOWA
From 22-MAY-11 15:25:00 to 22-MAY-11 15:25:00 (CST-6)
Location: UNIVERSITY HGTS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KEOKUK, IOWA
From 22-MAY-11 15:26:00 to 22-MAY-11 15:26:00 (CST-6)
Location: RICHLAND
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated to be 70 mph blew a large tree down in Richland, IA at 426 pm CDT May 22.  The tree blocked a road.

Hail in JONES, IOWA
From 22-MAY-11 15:30:00 to 22-MAY-11 15:30:00 (CST-6)
Location: OLIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball sized hail fell in Olin, IA at 430 pm CDT May 22.

Hail in JACKSON, IOWA
From 22-MAY-11 15:32:00 to 22-MAY-11 15:32:00 (CST-6)
Location: MONMOUTH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JONES, IOWA
From 22-MAY-11 15:35:00 to 22-MAY-11 15:35:00 (CST-6)
Location: WYOMING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar sized hail fell in Wyoming, IA at 435 pm CDT May 22.

Hail in JONES, IOWA
From 22-MAY-11 15:36:00 to 22-MAY-11 15:36:00 (CST-6)
Location: OXFORD JCT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter sized hail fell in Oxford Junction, IA at 436 pm CDT May 22.

Tornado in IOWA, IOWA
From 22-MAY-11 13:40:00 to 22-MAY-11 13:45:00 (CST-6)
Location: KOSZTA
Tornado F-scale: EF2
Property damage: 250.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm damage survey team determined that a track of EF2 damage extended from 3 miles northwest of Ladora, IA to 6 miles northwest of Marengo, IA. This path is roughly 4 miles long and 75 yards wide. This damage occurred approximately between 240 pm and 245 pm CDT May 22.
Along the path, trees were damages, portions of a house roof were blown off, and a string of 12 power poles were snapped.  Based on the damage, wind speeds were estimated at 120 mph.

Hail in KEOKUK, IOWA
From 22-MAY-11 15:37:00 to 22-MAY-11 15:37:00 (CST-6)
Location: OLLIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell in Ollie, IA at 437 pm CDT May 22.

Hail in JONES, IOWA
From 22-MAY-11 15:41:00 to 22-MAY-11 15:44:00 (CST-6)
Location: CENTER JCT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Slightly larger than quarter sized hail fell 3 miles south southwest of Center Junction, IA from 441 pm CDT to 444 pm CDT May 22.

Hail in JOHNSON, IOWA
From 22-MAY-11 15:45:00 to 22-MAY-11 15:45:00 (CST-6)
Location: IOWA CITY MUNI ARPT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Ping pong ball sized hail fell 1 mile east of the Iowa City Municipal Airport near Iowa City, IA at 445 pm CDT May 22.

Hail in JACKSON, IOWA
From 22-MAY-11 15:45:00 to 22-MAY-11 15:45:00 (CST-6)
Location: BUCKHORN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in JOHNSON, IOWA
From 22-MAY-11 15:47:00 to 22-MAY-11 15:47:00 (CST-6)
Location: IOWA CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter sized hail fell in Iowa City, IA at 447 pm CDT May 22.

Hail in JOHNSON, IOWA
From 22-MAY-11 15:48:00 to 22-MAY-11 15:48:00 (CST-6)
Location: IOWA CITY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball sized hail fell in Iowa City, IA at 448 pm CDT May 22.

Hail in WASHINGTON, IOWA
From 22-MAY-11 15:53:00 to 22-MAY-11 15:53:00 (CST-6)
Location: RIVERSIDE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLINTON, IOWA
From 22-MAY-11 15:55:00 to 22-MAY-11 15:55:00 (CST-6)
Location: TORONTO
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Golf ball sized hail fell in Toronto, IA at 455 pm CDT May 22.

Thunderstorm Wind in MUSCATINE, IOWA
From 22-MAY-11 16:20:00 to 22-MAY-11 16:20:00 (CST-6)
Location: ATALISSA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph blew some tree branches down in Atalissa, IA at 520 pm CDT May 22.

Thunderstorm Wind in CEDAR, IOWA
From 22-MAY-11 16:20:00 to 22-MAY-11 16:20:00 (CST-6)
Location: ROCHESTER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph were observed 2 miles south southwest of Rochester, IA at 520 pm CDT May 22.  Some debris was seen blowing across Interstate 80.

Thunderstorm Wind in CLINTON, IOWA
From 22-MAY-11 16:30:00 to 22-MAY-11 16:30:00 (CST-6)
Location: CALAMUS EASTVOLD ARP
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew some tree branches down 5 miles northwest of Grand Mound, IA at 530 pm CDT May 22.

Thunderstorm Wind in CLINTON, IOWA
From 22-MAY-11 16:45:00 to 22-MAY-11 16:45:00 (CST-6)
Location: CALAMUS EASTVOLD ARP
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph destroyed a machine shed, blew the roof off of a grain bin and blew some trees down about 2 miles northeast of Calamus, IA around 545 pm CDT May 22.

Thunderstorm Wind in CLINTON, IOWA
From 22-MAY-11 16:45:00 to 22-MAY-11 16:45:00 (CST-6)
Location: CALAMUS EASTVOLD ARP
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph were observed 2 miles northeast of Calamus, IA around 545 pm CDT May 22.

Thunderstorm Wind in CLINTON, IOWA
From 22-MAY-11 16:45:00 to 22-MAY-11 16:45:00 (CST-6)
Location: WELTON
Magnitude: 61.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

Wind gusts estimated to be 70 mph caused a garage door to cave in about 5 miles north northwest of De Witt, IA around 545 pm CDT May 22.

Thunderstorm Wind in CLINTON, IOWA
From 22-MAY-11 16:49:00 to 22-MAY-11 16:49:00 (CST-6)
Location: CHARLOTTE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew a tree down across Highway 136 about 23 miles northwest of Charlotte, IA around 549 pm CDT May 22.

Thunderstorm Wind in CLINTON, IOWA
From 22-MAY-11 16:30:00 to 22-MAY-11 16:30:00 (CST-6)
Location: CALAMUS EASTVOLD ARP
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph were observed 5 miles northwest of Grand Mound, IA at 530 pm CDT May 22.

Thunderstorm Wind in CEDAR, IOWA
From 22-MAY-11 15:42:00 to 22-MAY-11 15:42:00 (CST-6)
Location: LOWDEN
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: COOP Observer

Wind gusts estimated to be 70 mph blew down some trees onto some buildings and vehicles on the east side of Lowden, IA around 442 pm CDT May 22.  Power lines were also downed and some streets were blocked.

Hail in CLINTON, IOWA
From 22-MAY-11 16:44:00 to 22-MAY-11 16:44:00 (CST-6)
Location: DEWITT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in CLINTON, IOWA
From 22-MAY-11 16:44:00 to 22-MAY-11 16:44:00 (CST-6)
Location: DEWITT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts estimated to be 45 to 60 mph were observed in Dewitt, IA at 544 pm CDT May 22.

Thunderstorm Wind in SCOTT, IOWA
From 22-MAY-11 16:54:00 to 22-MAY-11 16:54:00 (CST-6)
Location: DAVENPORT ARPT
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew some large trees, power lines and power poles down in Eldridge, IA around 554 pm CDT May 22.

Thunderstorm Wind in JACKSON, IOWA
From 22-MAY-11 17:11:00 to 22-MAY-11 17:11:00 (CST-6)
Location: MILES
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph were observed about 5 miles west southwest of Sabula, IA around 611 pm CDT May 22. A power outage was also observed.