April 5th started off with sunny skies which helped to warm things up. The sun in addition to a developing low pressure system in Kansas pushed a warm front northward into Iowa. The front stalled out along and south of Highway 34, leaving areas north of the boundary in the 60s, while those to the south rose into the 70s.
The sunshine coupled with increasing moisture levels resulted in thunderstorm development during the afternoon and evening. Some of the thunderstorms were severe, producing large hail and damaging winds.

Hail in LINN, IOWA
From 05-APR-10 17:47:00 to 05-APR-10 17:47:00 (CST-6)
Location: COGGON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Half dollar sized hail fell in Coggon, IA at 647 pm April 5.  The hail covered the ground.

Hail in IOWA, IOWA
From 05-APR-10 16:25:00 to 05-APR-10 16:25:00 (CST-6)
Location: WILLIAMSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Quarter sized hail fell on Interstate 80 near mile marker 225 about 6 miles east northeast of Williamsburg, IA at 525 pm April 5.

Hail in JOHNSON, IOWA
From 05-APR-10 16:42:00 to 05-APR-10 16:42:00 (CST-6)
Location: NORTH LIBERTY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail fell in North Liberty, IA at 542 pm April 5.

Hail in JOHNSON, IOWA
From 05-APR-10 16:41:00 to 05-APR-10 16:41:00 (CST-6)
Location: TIFFIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell about 1 mile west of Tiffin, IA at 541 pm April 5.

Hail in JOHNSON, IOWA
From 05-APR-10 16:50:00 to 05-APR-10 16:50:00 (CST-6)
Location: NORTH LIBERTY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Non-severe hail (<1.0) fell in North Liberty, IA at 550 pm April 5.

Hail in BUCHANAN, IOWA
From 05-APR-10 17:43:00 to 05-APR-10 17:43:00 (CST-6)
Location: MONTI
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Non-severe hail (<1.0) fell near Monti, IA at 643 pm April 5.

Hail in DELAWARE, IOWA
From 05-APR-10 17:48:00 to 05-APR-10 17:48:00 (CST-6)
Location: ROBINSON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Non-severe hail (<1.0) fell about 4 miles west of Ryan, IA at 648 pm April 5.  The hail covered the ground.

Thunderstorm Wind in JONES, IOWA
From 05-APR-10 18:15:00 to 05-APR-10 18:15:00 (CST-6)
Location: MONTICELLO MUNI ARPT
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A 68 mph wind gust was recorded by the AWOS at the Monticello Municipal Airport just southeast of Monticello, IA at 715 pm April 5.

Thunderstorm Wind in LINN, IOWA
From 05-APR-10 20:50:00 to 05-APR-10 20:50:00 (CST-6)
Location: WALKER
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew a tin utility shed across a street in Walker, IA around 950 pm April 5.  In addition, a section of a privacy fence was blown down, a large softwood tree was blown down, and a 4x4 street sign post was snapped in half.

Hail in IOWA, IOWA
From 05-APR-10 16:10:00 to 05-APR-10 16:10:00 (CST-6)
Location: WILLIAMSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Non-severe hail (<1.0) fell near Williamsburg, IA at 510 pm April 5.

Hail in IOWA, IOWA
From 05-APR-10 16:10:00 to 05-APR-10 16:10:00 (CST-6)
Location: GENOA BLUFF
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell about 4 miles west of Williamsburg, IA at 510 pm April 5.

Hail in IOWA, IOWA
From 05-APR-10 16:20:00 to 05-APR-10 16:20:00 (CST-6)
Location: CONROY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Non-severe hail (<1.0) fell in Conroy, IA at 520 pm April 5.

Thunderstorm Wind in BENTON, IOWA
From 05-APR-10 21:10:00 to 05-APR-10 21:10:00 (CST-6)
Location: NEWHALL
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph damaged some signs at a Chevy Dealership in Newhall, IA around 1010 pm April 5.

Thunderstorm Wind in DUBUQUE, IOWA
From 05-APR-10 21:50:00 to 05-APR-10 21:50:00 (CST-6)
Location: (DBQ)DUBUQUE MUNI AR
Magnitude: 61.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 70 mph ripped the roof off of a house near the intersection of Buncombe Rd and Bennettville Rd or about 3 miles south southwest of the Dubuque, IA Regional Airport at 1050 pm April 5.

Thunderstorm Wind in DUBUQUE, IOWA
From 05-APR-10 21:52:00 to 05-APR-10 21:52:00 (CST-6)
Location: BERNARD
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 60 mph blew a semi truck off the road at the intersection of Highway 151 and Sundown Rd or about 9 miles west southwest of the Dubuque, IA Regional Airport at 1052 pm April 5.

Hail in JOHNSON, IOWA
From 05-APR-10 16:57:00 to 05-APR-10 16:57:00 (CST-6)
Location: SOLON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell in Solon, IA at 557 pm April 5.

Thunderstorm Wind in LINN, IOWA
From 05-APR-10 17:40:00 to 05-APR-10 17:40:00 (CST-6)
Location: ALBURNETT
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph blew some branches down and ripped some shingles and siding off a home in Alburnett, IA around 640 pm April 5.

Hail in LINN, IOWA
From 05-APR-10 17:41:00 to 05-APR-10 17:41:00 (CST-6)
Location: CENTRAL CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell in Central City, IA at 641 pm April 5.

Thunderstorm Wind in DUBUQUE, IOWA
From 05-APR-10 21:56:00 to 05-APR-10 21:56:00 (CST-6)
Location: (DBQ)DUBUQUE MUNI AR
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A 60 mph wind gust was recorded by the ASOS at the Dubuque, IA Regional Airport at 1056 pm April 5.

Thunderstorm Wind in JACKSON, IOWA
From 05-APR-10 22:07:00 to 05-APR-10 22:07:00 (CST-6)
Location: LA MOTTE
Magnitude: 56.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph ripped the roof off of a machine shed and blew a post through the side of a mobile home just east of the Dubuque-Jackson county line on 230th Avenue or about 3 miles north of La Motte, IA at 1107 pm April 5.

Thunderstorm Wind in DELAWARE, IOWA
From 05-APR-10 21:07:00 to 05-APR-10 21:07:00 (CST-6)
Location: ROBINSON
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph damaged or destroyed an unoccupied mobile home about 5 miles southwest of Ryan, IA around 1007 pm April 5.

Thunderstorm Wind in BENTON, IOWA
From 05-APR-10 21:12:00 to 05-APR-10 21:12:00 (CST-6)
Location: ATKINS
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 70 mph blew a steel roof off of a farm outbuilding, ripped the top of a silo off, and blew a barn down just north of Atkins, IA around 1012 pm April 5.

Thunderstorm Wind in BENTON, IOWA
From 05-APR-10 21:12:00 to 05-APR-10 21:12:00 (CST-6)
Location: ATKINS
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 74 mph wind gust was measured at the Atkins, IA Fire Department at 1012 pm April 5.

Thunderstorm Wind in DUBUQUE, IOWA
From 05-APR-10 21:38:00 to 05-APR-10 21:38:00 (CST-6)
Location: FILLMORE
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph destroyed a barn about 6 miles northeast of Cascade, IA around 1038 pm April 5.

Hail in DUBUQUE, IOWA
From 05-APR-10 21:50:00 to 05-APR-10 21:50:00 (CST-6)
Location: CENTER GROVE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Half dollar sized hail fell in Dubuque, IA at 1050 pm April 5.  This report was relayed by WREX TV.

Thunderstorm Wind in DUBUQUE, IOWA
From 05-APR-10 21:40:00 to 05-APR-10 21:40:00 (CST-6)
Location: CASCADE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A 58 mph wind gust was measured at the Cascade, IA Fire Department at 1040 pm April 5.

Thunderstorm Wind in DUBUQUE, IOWA
From 05-APR-10 21:50:00 to 05-APR-10 21:50:00 (CST-6)
Location: (DBQ)DUBUQUE MUNI AR
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 70 mph blew some farm machinery over and downed some power lines about 2 miles southeast of the Dubuque, IA Regional Airport at 1050 pm April 5.

Thunderstorm Wind in DELAWARE, IOWA
From 05-APR-10 21:22:00 to 05-APR-10 21:22:00 (CST-6)
Location: BUCK CREEK
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph damaged the roof of a barn about 3 miles southwest of Hopkinton, IA at 1022 pm April 5.

Thunderstorm Wind in LINN, IOWA
From 05-APR-10 21:27:00 to 05-APR-10 21:27:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 to 65 mph were observed about 1 mile south southeast of Cedar Rapids, IA at 1027 pm April 5.

Thunderstorm Wind in LINN, IOWA
From 05-APR-10 21:30:00 to 05-APR-10 21:30:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts measuring 60 mph were observed about 3 miles east of Cedar Rapids, IA at 1030 pm April 5.

Thunderstorm Wind in JONES, IOWA
From 05-APR-10 21:27:00 to 05-APR-10 21:27:00 (CST-6)
Location: MONTICELLO
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 60 mph caused a horse trailer to flip over on Highway 38 near Sam Springs or about 5 miles southeast of Hopkinton, IA around 1027 pm April 5.

Thunderstorm Wind in LINN, IOWA
From 05-APR-10 21:35:00 to 05-APR-10 21:35:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph lofted a sheet of plywood and damaged the Hy-Vee Garden Center on the east side of Cedar Rapids, IA at 1035 pm April 5.

Hail in JOHNSON, IOWA
From 05-APR-10 16:45:00 to 05-APR-10 16:45:00 (CST-6)
Location: NORTH LIBERTY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Non-severe hail (<1.0) fell at Exit 4 on Interstate 380 near North Liberty, IA at 545 pm April 5.

Hail in LINN, IOWA
From 05-APR-10 17:40:00 to 05-APR-10 17:40:00 (CST-6)
Location: LAFAYETTE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell about 4 miles east of Center Point, IA at 640 pm April 5.