A cluster of storms developed during the mid-afternoon hours of July 16th  near Cedar Rapids.  It moved southward producing torrential rains, large hail, and damaging winds.  Just before 6 PM, a tornado touched down on the east side of Washington, IA.  Additional severe storms developed northwest of the Cedar Rapids area during the early evening hours, which were quickly followed by a thunderstorm complex which produced damaging winds and large hail.  The severe weather activity died down between 11 PM and 4 AM.  Between 4 and 8 AM, yet another thunderstorm complex dove southeast from northeast Iowa to central Illinois producing damaging winds and flooding rains.  Rainfall totals throughout the 18 hour period ranged between 1 and 4 inches.

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 16:56:00 to 16-JUL-07 16:56:00 (CST-6)
Location: RICHMOND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was damaged in town.

Hail in WASHINGTON, IOWA
From 16-JUL-07 16:50:00 to 16-JUL-07 16:50:00 (CST-6)
Location: WASHINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHINGTON, IOWA
From 16-JUL-07 16:49:00 to 16-JUL-07 16:49:00 (CST-6)
Location: WASHINGTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 16:53:00 to 16-JUL-07 16:53:00 (CST-6)
Location: WASHINGTON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Hail in WASHINGTON, IOWA
From 16-JUL-07 16:56:00 to 16-JUL-07 16:56:00 (CST-6)
Location: RICHMOND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Time estimated.

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 17:00:00 to 16-JUL-07 17:00:00 (CST-6)
Location: WASHINGTON ARPT
Magnitude: 61.00 EG
Property damage: 0.00K
Reported by: Trained Spotter

Some corn fields were flattened just east of Washington. Time estimated.

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 16:11:00 to 16-JUL-07 16:11:00 (CST-6)
Location: RIVERSIDE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several tree limbs, some 1 foot in diameter, were blown down in town.

Hail in WASHINGTON, IOWA
From 16-JUL-07 16:55:00 to 16-JUL-07 16:55:00 (CST-6)
Location: BRIGHTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail and larger fell in town.

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 16:39:00 to 16-JUL-07 16:39:00 (CST-6)
Location: KALONA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Some branches were blown down.  Water was also ponding on some city streets.

Tornado in WASHINGTON, IOWA
From 16-JUL-07 16:49:00 to 16-JUL-07 16:49:00 (CST-6)
Location: WASHINGTON
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down on the east side of town. It moved south and lifted approximately one half mile south of town.
A car dealership and nearby storage garage were damaged in Washington.  A car and small pickup truck were reported to be briefly lifted and dropped.  Numerous tree limbs and branches were down throughout town.

Hail in JOHNSON, IOWA
From 16-JUL-07 15:33:00 to 16-JUL-07 15:33:00 (CST-6)
Location: SWISHER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSON, IOWA
From 16-JUL-07 15:39:00 to 16-JUL-07 15:39:00 (CST-6)
Location: SWISHER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 17:06:00 to 16-JUL-07 17:06:00 (CST-6)
Location: RIVERSIDE
Magnitude: 61.00 EG
Property damage: 0.00K
Reported by: Trained Spotter

Several corn fields between Kalona and Riverside were damaged.

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 17:09:00 to 16-JUL-07 17:09:00 (CST-6)
Location: WASHINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The power was knocked out in town.  Ditches are full with runoff.

Hail in JEFFERSON, IOWA
From 16-JUL-07 17:44:00 to 16-JUL-07 17:44:00 (CST-6)
Location: PERLEE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to quarter size hail fell at the intersection of Pleasant Plain Rd and Olive Avenue near Perlee, IA, or about 6 miles ENE of Fairfield, IA.

Thunderstorm Wind in LINN, IOWA
From 16-JUL-07 19:19:00 to 16-JUL-07 19:19:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Some branches were blown down and the power was knocked out.

Flash Flood in JOHNSON, IOWA
From 16-JUL-07 21:41:00 to 16-JUL-07 22:30:00 (CST-6)
Location: OAKDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood waters cover streets from curb to curb.

Heavy Rain in SCOTT, IOWA
From 16-JUL-07 22:47:00 to 17-JUL-07 00:00:00 (CST-6)
Location: DAVENPORT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The intersection of E 37th Street and Bridge Avenue is flooded.

Thunderstorm Wind in LINN, IOWA
From 16-JUL-07 20:40:00 to 16-JUL-07 20:40:00 (CST-6)
Location: MARION
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs 8 to 9 inches in diameter were blown down.

Thunderstorm Wind in BENTON, IOWA
From 16-JUL-07 21:18:00 to 16-JUL-07 21:18:00 (CST-6)
Location: IRVING
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The RWIS site at Highways 30 and 21 measured a wind gust of 76 mph.

Thunderstorm Wind in DELAWARE, IOWA
From 17-JUL-07 04:15:00 to 17-JUL-07 04:15:00 (CST-6)
Location: MASONVILLE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind estimated to be 60 mph flattened some corn fields.  Time estimated.

Flash Flood in JOHNSON, IOWA
From 16-JUL-07 16:19:00 to 16-JUL-07 17:00:00 (CST-6)
Location: OAKDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood waters in the median of Highway 218 is encroaching onto the highway.

Thunderstorm Wind in BUCHANAN, IOWA
From 17-JUL-07 03:19:00 to 17-JUL-07 03:19:00 (CST-6)
Location: STANLEY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds estimated to be at least 70 mph blew several trees at least partially down.

Thunderstorm Wind in LINN, IOWA
From 17-JUL-07 04:00:00 to 17-JUL-07 04:00:00 (CST-6)
Location: FAIRFAX
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 5.00K
Reported by: COOP Observer

Wind estimated to be 65 mph flattened some corn fields.  Time estimated.

Flash Flood in WASHINGTON, IOWA
From 16-JUL-07 17:43:00 to 16-JUL-07 19:00:00 (CST-6)
Location: WASHINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Streets in Washington, IA are flooded.

Flash Flood in LINN, IOWA
From 16-JUL-07 20:45:00 to 16-JUL-07 22:00:00 (CST-6)
Location: CEDAR RAPIDS
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A torrential downpour caused Blairs Ferry Rd and Council Rd to flood.  A car stalled in the flood waters.

Hail in VAN BUREN, IOWA
From 16-JUL-07 18:52:00 to 16-JUL-07 18:52:00 (CST-6)
Location: STOCKPORT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in JEFFERSON, IOWA
From 16-JUL-07 18:55:00 to 16-JUL-07 18:55:00 (CST-6)
Location: FAIRFIELD
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Some trees were blown down along Highway 1 on the south side of town.

Thunderstorm Wind in BUCHANAN, IOWA
From 16-JUL-07 19:55:00 to 16-JUL-07 19:55:00 (CST-6)
Location: JESUP
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINN, IOWA
From 16-JUL-07 19:03:00 to 16-JUL-07 19:03:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to nickel size hail fell horizontally.

Hail in LINN, IOWA
From 16-JUL-07 19:15:00 to 16-JUL-07 19:20:00 (CST-6)
Location: MARION MC BRIDE ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Pea to quarter size hail fell for about 5 minutes.

Hail in LINN, IOWA
From 16-JUL-07 19:15:00 to 16-JUL-07 19:20:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Pea to quarter size hail fell for about 5 minutes.

Thunderstorm Wind in LINN, IOWA
From 16-JUL-07 19:20:00 to 16-JUL-07 19:20:00 (CST-6)
Location: COVINGTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several tree limbs 1 to 4 inches in diameter blown down.  The power was also out.

Thunderstorm Wind in LINN, IOWA
From 16-JUL-07 20:36:00 to 16-JUL-07 20:36:00 (CST-6)
Location: MARION
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The wind gradually increased knocking the power out on North 10th Street near Linn-Marr School.

Thunderstorm Wind in LINN, IOWA
From 16-JUL-07 20:38:00 to 16-JUL-07 20:38:00 (CST-6)
Location: MARION
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The power was knocked out along Blairs Ferry Road.

Hail in LINN, IOWA
From 16-JUL-07 16:11:00 to 16-JUL-07 16:11:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in VAN BUREN, IOWA
From 16-JUL-07 18:35:00 to 16-JUL-07 18:35:00 (CST-6)
Location: STOCKPORT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in JEFFERSON, IOWA
From 16-JUL-07 18:45:00 to 16-JUL-07 18:45:00 (CST-6)
Location: FAIRFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A power pole was blown down on the south side of town along Highway 1.

Thunderstorm Wind in LINN, IOWA
From 16-JUL-07 19:05:00 to 16-JUL-07 19:05:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LINN, IOWA
From 16-JUL-07 19:05:00 to 16-JUL-07 19:05:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust, estimated at 70 mph, downed some limbs 1 to 3 inches in diameter.

Hail in LINN, IOWA
From 16-JUL-07 19:23:00 to 16-JUL-07 19:23:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Pea to quarter size hail fell.

Hail in VAN BUREN, IOWA
From 16-JUL-07 19:35:00 to 16-JUL-07 19:35:00 (CST-6)
Location: MT ZION
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel to quarter size hail fell.

Hail in VAN BUREN, IOWA
From 16-JUL-07 19:35:00 to 16-JUL-07 19:35:00 (CST-6)
Location: KEOSAUQUA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSON, IOWA
From 16-JUL-07 15:30:00 to 16-JUL-07 15:30:00 (CST-6)
Location: OAKDALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail fell at Coral Ridge Mall.

Flash Flood in JOHNSON, IOWA
From 17-JUL-07 07:00:00 to 17-JUL-07 11:00:00 (CST-6)
Location: SOLON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water flowed over 140th Street near Hoosier Creek about one half mile west of Ely Rd.

Thunderstorm Wind in WASHINGTON, IOWA
From 16-JUL-07 16:57:00 to 16-JUL-07 16:57:00 (CST-6)
Location: KALONA
Magnitude: 65.00 EG
Property damage: 25.00K
Reported by: Broadcast Media

A corn field was flattened near town and some farm buildings were damaged near Highway 22 and Highway 1.

Thunderstorm Wind in BENTON, IOWA
From 17-JUL-07 04:00:00 to 17-JUL-07 04:00:00 (CST-6)
Location: SHELLSBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Law Enforcement

Winds estimated to be 60 mph blew down some corn fields.  Time estimated.