Synoptic quasi-stationary boundary was located across the forecast area, initially across northern parts during the morning and then sagging south as an upper level wave moved into the region during the late afternoon and evening hours. A morning complex of storms caused sporadic wind damage as well as some areal flooding. Subsidence behind the system kept any further development of storms limited until the approach of the wave. This wave, combined with the front and instability advected in from central Illinois all set the stage for increasing thunderstorm development. Several supercells developed, producing long lived wall clouds and two confirmed tornadoes. IN addition, training of convection caused flash flooding in some parts of Indiana and Ohio.

Flash Flood in CASS, INDIANA
From 11-JUL-17 00:00:00 to 11-JUL-17 03:00:00 (EST-5)
Location: YOUNG AMERICA
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 500.00K
Reported by: NWS Storm Survey

Three to five inches of rain fell onto already saturated ground in the span of a few hours, resulting in rapid rises on several creeks, streams and ditches in southern parts of the county, especially from County Road 300 S down to the Howard county line. Rock and Paint Creeks as well as Tolen ditch were impacted the most with numerous roads closed due to 1 to 3 feet of flowing water over bridges. In addition, the extensive amount of water was flowing over several roads where generally flat terrain existed. Water depth approached 6 inches in spots. Emergency management officials reported at least 2 roads washed out and 1 bridge collapse. State Road 29 between Highway 218 and 18, Highway 18 between State Route 29 and US 35, Highway 218 between Highway 29 and US 35, US 35 at Anoka all closed due to high flowing water on the roads. Flooding issues continued well into the 12th, despite no further rainfall occurring.   Damage amounts likely exceeded a million dollars, but no exact figures were available.

Flood in CASS, INDIANA
From 11-JUL-17 03:00:00 to 12-JUL-17 00:00:00 (EST-5)
Location: LOGANSPORT MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

High water levels continued well after rain had stopped on the 10th, with numerous roads remaining closed due to flowing water. The extensive flooding made it difficult to survey a tornado that occurred in the flooding area. More specific details can be found under the Flash Flood entry for this event. A 6 year old boy was killed after somehow ending up in a swollen Mason Kingery ditch west of Galveston Town Park. He was pulled to along Indiana 18 and trapped by the high water. He was eventually pronounced dead after rescue attempts.

Tornado in CASS, INDIANA
From 10-JUL-17 18:56:00 to 10-JUL-17 19:06:00 (EST-5)
Location: DEACON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS survey of the area confirmed the touchdown of a tornado in Carroll county, which tracked east into Cass county. Most of the damage was confined to crops along the path. However, several trees were blown down off of S County Road 125 E and 200 E. A poorly anchored smaller barn was destroyed with a nearby larger barn suffering metal roofing damage. A home in the area also suffered minor damage. Maximum winds were estimated at around 95 mph.

Tornado in MIAMI, INDIANA
From 10-JUL-17 18:58:00 to 10-JUL-17 19:06:00 (EST-5)
Location: CHILI
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS survey of damage indicated a tornado touched down northeast of Denver, near the intersection of N Warsaw Trail and E County Road 800 N. The tornado remained over open fields for part of its time, doing crop damage along its path. Some trees were either snapped or uprooted. A poorly anchored, older barn was destroyed near the intersection of N County Road 600 East and E County Road 900 N. The tornado lifted shortly after crossing 900 N. Maximum winds were estimated at around 90 mph.

Thunderstorm Wind in ADAMS, INDIANA
From 10-JUL-17 18:55:00 to 10-JUL-17 18:56:00 (EST-5)
Location: DECATUR
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down in the area.

Thunderstorm Wind in ADAMS, INDIANA
From 10-JUL-17 19:00:00 to 10-JUL-17 19:01:00 (EST-5)
Location: PETERSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported tree limbs down in the area.