A nearly stationary frontal boundary spawned a line of thunderstorms that produced numerous reports of damaging winds and isolated tornadoes.

Thunderstorm Wind in SCOTT, IOWA
From 17-JUL-16 05:35:00 to 17-JUL-16 05:35:00 (CST-6)
Location: BETTENDORF
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A NWS employee reported a tree was uprooted and the crown of a tree was snapped along with several 6 inch diameter branches down.  Time was estimated by the radar.

Thunderstorm Wind in CLINTON, IOWA
From 17-JUL-16 05:23:00 to 17-JUL-16 05:23:00 (CST-6)
Location: DEWITT
Magnitude: 52.00 EG
Reported by: Law Enforcement

The De Witt law enforcement reported trees were down in the town.

Thunderstorm Wind in CLINTON, IOWA
From 17-JUL-16 05:25:00 to 17-JUL-16 05:25:00 (CST-6)
Location: DEWITT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported numerous trees were down on the southeast side of the town of De Witt.  A few trees fell on the roofs of houses.

Thunderstorm Wind in SCOTT, IOWA
From 17-JUL-16 05:30:00 to 17-JUL-16 05:30:00 (CST-6)
Location: DAVENPORT ARPT
Magnitude: 52.00 EG
Reported by: NWS Employee

A NWS employee reported 4 to 6 inch diameter branches were broken off and blown 100 to  200 yards. The tree was along U.S. 61 north of Le Claire road east of Eldridge.

Tornado in SCOTT, IOWA
From 17-JUL-16 05:27:00 to 17-JUL-16 05:30:00 (CST-6)
Location: PARKVIEW
Tornado F-scale: EF0
Reported by: NWS Storm Survey

A NWS storm survey team reported a brief EF-0 tornado did damage to trees and downed corn stalks.

Tornado in SCOTT, IOWA
From 17-JUL-16 05:36:00 to 17-JUL-16 05:39:00 (CST-6)
Location: PRINCETON
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A NWS storm survey team reported a brief EF-1 tornado did some damage to corn crops and some hardwood trees were snapped off.

Tornado in BENTON, IOWA
From 17-JUL-16 03:58:00 to 17-JUL-16 04:00:00 (CST-6)
Location: VINTON
Tornado F-scale: EF2
Reported by: NWS Storm Survey

A tornado tracked across the southern parts of Vinton, with damage to over a dozen homes, an apartment complex and other buildings including some roofs removed.  Numerous power poles and trees were down with damage to other structures like a cell phone tower and some corn fields.

Tornado in LINN, IOWA
From 17-JUL-16 04:19:00 to 17-JUL-16 04:21:00 (CST-6)
Location: FAIRFAX
Tornado F-scale: EF2
Property damage: 250.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado from Benton County continued southeast through southeastern portions of Walford.   The tornado damaged the roofs of numerous homes.  One home was completely destroyed when it collapsed on itself, apparently aided by wind blown debris.

Tornado in BENTON, IOWA
From 17-JUL-16 04:15:00 to 17-JUL-16 04:19:00 (CST-6)
Location: NORWAY
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 15.00K
Reported by: NWS Storm Survey

A tornado touched down southeast of Norway and tracked southeast to Walford and then into Linn County.  It damaged 2 farmsteads before reaching Walford.  In Walford, it damaged the roofs of numerous homes.

Thunderstorm Wind in LINN, IOWA
From 17-JUL-16 04:15:00 to 17-JUL-16 04:15:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The KCRG weather equipment measured 61 MPH at the Xavier High School on the west side of Cedar Rapids.

Thunderstorm Wind in BUCHANAN, IOWA
From 17-JUL-16 03:49:00 to 17-JUL-16 03:49:00 (CST-6)
Location: JESUP
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local media report of an empty grain bin that was destroyed and blown into another structure.

Thunderstorm Wind in SCOTT, IOWA
From 17-JUL-16 05:25:00 to 17-JUL-16 05:25:00 (CST-6)
Location: PARKVIEW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A NWS employee reported a 3 inch tree limb was down in a driveway.

Thunderstorm Wind in SCOTT, IOWA
From 17-JUL-16 05:22:00 to 17-JUL-16 05:22:00 (CST-6)
Location: SCOTT COUNTY PARK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Estmated winds of 60 MPH by a NWS Employee.

Thunderstorm Wind in BUCHANAN, IOWA
From 17-JUL-16 03:55:00 to 17-JUL-16 03:55:00 (CST-6)
Location: INDEPENDENCE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated winds of 70 to 75 mph based on the movement of the trees.   No damage was visible at the time of the report.

Thunderstorm Wind in JACKSON, IOWA
From 17-JUL-16 05:02:00 to 17-JUL-16 05:02:00 (CST-6)
Location: MAQUOKETA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported a couple of trees were uprooted in the town of Maquoketa.

Thunderstorm Wind in SCOTT, IOWA
From 17-JUL-16 05:25:00 to 17-JUL-16 05:25:00 (CST-6)
Location: DAVENPORT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported tree branches were down along the 2200 block of North Washington Street in Davenport.  The time was estimated using radar.

Thunderstorm Wind in BUCHANAN, IOWA
From 17-JUL-16 03:54:00 to 17-JUL-16 03:54:00 (CST-6)
Location: JESUP
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The fire department reported a grain bin was destroyed with another having its side pushed in by the wind.

Thunderstorm Wind in CLINTON, IOWA
From 17-JUL-16 05:13:00 to 17-JUL-16 05:13:00 (CST-6)
Location: CALAMUS
Magnitude: 52.00 EG
Reported by: Public

A public drone video showed that two apparent severe thunderstorm down-bursts had damaged corn in a field south of Calamus.

Thunderstorm Wind in DELAWARE, IOWA
From 17-JUL-16 04:25:00 to 17-JUL-16 04:25:00 (CST-6)
Location: MANCHESTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A storm survey team observed numerous tree branches down that were greater than 6 inches in diameter. The time is estimated based on radar.

Thunderstorm Wind in LINN, IOWA
From 17-JUL-16 04:10:00 to 17-JUL-16 04:10:00 (CST-6)
Location: PALO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter observed power flashes around 5:10 AM CDT this morning and later in the morning there were power lines observed down in the area with the power out.

Tornado in JACKSON, IOWA
From 17-JUL-16 05:03:00 to 17-JUL-16 05:04:00 (CST-6)
Location: ANDREW
Tornado F-scale: EF1
Property damage: 5000.00K
Reported by: NWS Storm Survey

A NWS storm survey team reported an EF-1 tornado crossed the southern parts of the town of Andrew. A building at the local coop was destroyed and numerous trees were snapped.

Thunderstorm Wind in SCOTT, IOWA
From 17-JUL-16 05:22:00 to 17-JUL-16 05:22:00 (CST-6)
Location: GAMBRILL
Magnitude: 52.00 EG
Reported by: COOP Observer

A COOP Observer reported a Mulberry tree was blown over, numerous other tree limbs were down.

Thunderstorm Wind in JACKSON, IOWA
From 17-JUL-16 05:23:00 to 17-JUL-16 05:23:00 (CST-6)
Location: ANDREW
Magnitude: 61.00 EG
Property damage: 5000.00K
Reported by: Law Enforcement

Local law enforcement reported significant damage to a building with nearby trees twisted and some farm equipment knocked over.