Two waves of showers and thunderstorms developed ahead of a cold front moving into the Upper Midwest on September 19, 2013. Some of these thunderstorms became severe during the afternoon and continued into the evening. Isolated reports of wind damage occurred in southeast Iowa while several reports of wind damage were received from Linn County northeastward to Dubuque County. Rainfall amounts ranged from a few hundredths along Interstate 80 to 0.75 to 1.50 inches from Linn County through Dubuque County.

Thunderstorm Wind in BENTON, IOWA
From 19-SEP-13 17:16:00 to 19-SEP-13 17:16:00 (CST-6)
Location: NEWHALL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

This reported was relayed by the Benton County Emergency Manager.

Thunderstorm Wind in LINN, IOWA
From 19-SEP-13 17:25:00 to 19-SEP-13 17:25:00 (CST-6)
Location: WESTERN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated wind speeds of 60 mph with heavy rain on the southwest side of town.  They also reported seeing possible rotation in the clouds.

Thunderstorm Wind in LINN, IOWA
From 19-SEP-13 17:30:00 to 19-SEP-13 17:30:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated 60 mph winds with heavy rain.

Thunderstorm Wind in BENTON, IOWA
From 19-SEP-13 17:34:00 to 19-SEP-13 17:34:00 (CST-6)
Location: SHELLSBURG
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that 4 to 6 inch tree limbs were down in town.

Thunderstorm Wind in BENTON, IOWA
From 19-SEP-13 17:30:00 to 19-SEP-13 17:30:00 (CST-6)
Location: VINTON MEML ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in CEDAR, IOWA
From 19-SEP-13 17:51:00 to 19-SEP-13 17:51:00 (CST-6)
Location: TIPTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that 8 to 12 inch diameter tree limbs were down.

Thunderstorm Wind in DUBUQUE, IOWA
From 19-SEP-13 18:43:00 to 19-SEP-13 18:43:00 (CST-6)
Location: GRAF
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A state official reported 3 to 4 inch tree limbs down between Graf and Twin Spring. The report was delayed.

Thunderstorm Wind in BENTON, IOWA
From 19-SEP-13 17:35:00 to 19-SEP-13 17:35:00 (CST-6)
Location: VINTON MEML ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS reported thunderstorm winds gusting to 63 mph starting at 630 PM and continuing through at least 635 PM.

Thunderstorm Wind in JOHNSON, IOWA
From 19-SEP-13 17:29:00 to 19-SEP-13 17:29:00 (CST-6)
Location: NORTH LIBERTY
Magnitude: 78.00 EG
Property damage: 140.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Three properties were damaged on the northwest side of New Liberty.  Two homes had their garage doors blown in and walls subsequently blown out of the houses.  There were also house windows broken and a flagpole was ripped out of the ground and thrown over a house.  A weather station operated by the City of North Liberty measured a peak gust of 73 mph.

Thunderstorm Wind in DELAWARE, IOWA
From 19-SEP-13 18:20:00 to 19-SEP-13 18:20:00 (CST-6)
Location: DELAWARE
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast Media reported a large sign was blown down damaging 3 cars.  Time of the event was estimated from radar.

Thunderstorm Wind in JONES, IOWA
From 19-SEP-13 14:40:00 to 19-SEP-13 14:40:00 (CST-6)
Location: ANAMOSA
Magnitude: 65.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Emergency Manager for Jones County reported that part of a tree snapped off and fell on a van outside of the Anamosa Courthouse. The report was delayed.

Thunderstorm Wind in JONES, IOWA
From 19-SEP-13 15:05:00 to 19-SEP-13 15:05:00 (CST-6)
Location: SCOTCH GROVE
Magnitude: 65.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Jones County Emergency Manager reported that part of a tree snapped off in Scotch Grove. The report was delayed and time of the event was estimated from radar.

Thunderstorm Wind in BENTON, IOWA
From 19-SEP-13 17:02:00 to 19-SEP-13 17:02:00 (CST-6)
Location: BELLE PLAINE
Magnitude: 65.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that a large tree was down and blocking a road in Belle Plaine.

Thunderstorm Wind in JOHNSON, IOWA
From 19-SEP-13 17:25:00 to 19-SEP-13 17:25:00 (CST-6)
Location: IOWA CITY
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement relayed that they received several reports of limbs down and isolated power poles down in western and southern portions of the county.

Hail in LINN, IOWA
From 19-SEP-13 14:29:00 to 19-SEP-13 14:29:00 (CST-6)
Location: WESTERN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that penny to nickel sized hail fell near the GE Building on Highway 30 and C St. SW.

Thunderstorm Wind in WASHINGTON, IOWA
From 19-SEP-13 17:20:00 to 19-SEP-13 17:20:00 (CST-6)
Location: WASHINGTON
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported that trees were down along with roof and vehicle damage at the Washington Golf and Country Club. The time of this event was estimated from radar.

Thunderstorm Wind in JOHNSON, IOWA
From 19-SEP-13 17:30:00 to 19-SEP-13 17:30:00 (CST-6)
Location: IOWA CITY
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 25 foot tall tree down on the west side of town along the Camp Cardinal Road. The report was delayed and the time of the event was estimated from radar.

Thunderstorm Wind in CEDAR, IOWA
From 19-SEP-13 17:50:00 to 19-SEP-13 17:50:00 (CST-6)
Location: TIPTON
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that several large trees were down on the west side of town. A cattle shed at the fairgrounds was also blown down. Time of the event was estimated from radar.

Thunderstorm Wind in DUBUQUE, IOWA
From 19-SEP-13 18:44:00 to 19-SEP-13 18:44:00 (CST-6)
Location: CENTRALIA
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: State Official

A state official reported that a highway sign was down at the Sundown Ski Resort. The report was delayed.

Hail in JONES, IOWA
From 19-SEP-13 18:00:00 to 19-SEP-13 18:00:00 (CST-6)
Location: OLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported nickel to quarter size hail.

Thunderstorm Wind in KEOKUK, IOWA
From 19-SEP-13 16:50:00 to 19-SEP-13 16:50:00 (CST-6)
Location: SOUTH ENGLISH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that 2 inch diameter tree limbs were down in town.

Thunderstorm Wind in KEOKUK, IOWA
From 19-SEP-13 16:55:00 to 19-SEP-13 16:55:00 (CST-6)
Location: KINROSS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 6 inch diameter limbs down.

Thunderstorm Wind in LINN, IOWA
From 19-SEP-13 17:34:00 to 19-SEP-13 17:34:00 (CST-6)
Location: HIAWATHA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter from Minnesota reported a 5 inch branch down. They estimated the winds to be 50 to 60 MPH. Time of the event was estimated using radar.