A disturbance interacting with a frontal system produced an area of severe thunderstorms with numerous damaging winds, some flash flooding and a few isolated, brief tornadoes.

Thunderstorm Wind in BUCHANAN, IOWA
From 23-JUL-16 14:49:00 to 23-JUL-16 14:49:00 (CST-6)
Location: FONTANA COUNTY PARK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager estimated winds of up to 70 to 80 MPH with downed trees at the local campground.

Tornado in DUBUQUE, IOWA
From 23-JUL-16 15:46:00 to 23-JUL-16 15:48:00 (CST-6)
Location: WORTHINGTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported a brief tornado between Farley, Worthington, and Dyersville.

Thunderstorm Wind in BUCHANAN, IOWA
From 23-JUL-16 14:35:00 to 23-JUL-16 14:35:00 (CST-6)
Location: INDEPENDENCE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated wind speeds of 60 to 65 MPH.

Thunderstorm Wind in BUCHANAN, IOWA
From 23-JUL-16 14:30:00 to 23-JUL-16 14:30:00 (CST-6)
Location: INDEPENDENCE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated winds up to 65 MPH along with very heavy rain.

Tornado in BUCHANAN, IOWA
From 23-JUL-16 15:05:00 to 23-JUL-16 15:06:00 (CST-6)
Location: MONTI
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down near the county line and moved east into Delaware County.

Tornado in DELAWARE, IOWA
From 23-JUL-16 15:06:00 to 23-JUL-16 15:07:00 (CST-6)
Location: MASONVILLE
Tornado F-scale: EF1
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado moved east from Buchanan County and a roof of a barn was removed before lifting.

Thunderstorm Wind in DELAWARE, IOWA
From 23-JUL-16 15:25:00 to 23-JUL-16 15:25:00 (CST-6)
Location: HOPKINTON
Magnitude: 52.00 EG
Reported by: Trained Spotter

A trained spotter reported via facebook several large trees and some branches were down.  The time was estimated using radar.

Tornado in DELAWARE, IOWA
From 23-JUL-16 15:18:00 to 23-JUL-16 15:19:00 (CST-6)
Location: TURTLE CREEK PARK
Tornado F-scale: EF1
Reported by: Public

A public video of a waterspout crossing a portion of Lake Delhi and coming ashore and damaging some trees.

Thunderstorm Wind in BUCHANAN, IOWA
From 23-JUL-16 14:49:00 to 23-JUL-16 14:49:00 (CST-6)
Location: FONTANA COUNTY PARK
Magnitude: 65.00 EG
Reported by: Emergency Manager

The emergency manager reported several trees were down at the local campground.

Flash Flood in BUCHANAN, IOWA
From 23-JUL-16 15:36:00 to 23-JUL-16 17:36:00 (CST-6)
Location: INDEPENDENCE
Flood cause: Heavy Rain
Property damage: 2000.00K
Crop damage: 500.00K
Reported by: Trained Spotter

A trained spotter reported flash flooding in Independence.  The gravel road at the high school complex was washed out and the parking lot was under several inches of water.

Thunderstorm Wind in JONES, IOWA
From 23-JUL-16 16:30:00 to 23-JUL-16 16:30:00 (CST-6)
Location: WYOMING
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported partial trees were down.  The time was estimated based on radar.

Flash Flood in JONES, IOWA
From 23-JUL-16 17:30:00 to 23-JUL-16 19:30:00 (CST-6)
Location: MONTICELLO
Flood cause: Heavy Rain
Property damage: 1000.00K
Crop damage: 1000.00K
Reported by: Emergency Manager

The emergency manager reported water up to 1.5 feet in depth on the outdoor track at the fairgrounds.

Thunderstorm Wind in JACKSON, IOWA
From 23-JUL-16 17:18:00 to 23-JUL-16 17:18:00 (CST-6)
Location: MONMOUTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A NWS employee reported large branches were downed by the high wind.

Flash Flood in DUBUQUE, IOWA
From 23-JUL-16 16:50:00 to 23-JUL-16 18:50:00 (CST-6)
Location: SAGEVILLE
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 500.00K
Reported by: Amateur Radio

Amateur radio report received of water over several roads in downtown Dubuque   including Central Avenue and Jackson Streets which were closed.

Flash Flood in BUCHANAN, IOWA
From 23-JUL-16 16:15:00 to 23-JUL-16 18:15:00 (CST-6)
Location: INDEPENDENCE
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 500.00K
Reported by: Trained Spotter

A trained spotter reported small streams are out of their banks with localized flash flooding in some parts of the town.  Received over 2.5 inches of rain in 40 minutes.

Thunderstorm Wind in DELAWARE, IOWA
From 23-JUL-16 15:21:00 to 23-JUL-16 15:21:00 (CST-6)
Location: DELHI
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 3 tree limbs approximately 6 to 12 inches in diameter were down.

Thunderstorm Wind in DELAWARE, IOWA
From 23-JUL-16 15:10:00 to 23-JUL-16 15:10:00 (CST-6)
Location: MANCHESTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A public report of 2 estimated 8 inch in diameter trees were down. This report was received by Twitter and the time was estimated by radar.

Thunderstorm Wind in BUCHANAN, IOWA
From 23-JUL-16 15:03:00 to 23-JUL-16 15:03:00 (CST-6)
Location: INDEPENDENCE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported numerous tree branches were down across town.

Thunderstorm Wind in BUCHANAN, IOWA
From 23-JUL-16 14:35:00 to 23-JUL-16 14:35:00 (CST-6)
Location: INDEPENDENCE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 4 inch diameter tree branch was snapped off a tree.