Weak, but persistent warm air advection moved into the region extending from eastern Iowa into northern Indiana. Extreme instability developed to the west across Illinois where CAPEs exceeded 5000 j/kg and LI's reached -10 C. As the instability advected east along this area of isentropic lift, thunderstorms rapidly developed. Due to the slow movement of these storms as well as precipitable water values at or above 2 inches, widepsread heavy rain was observed in many locations. With northwest flow aloft, the line drifted south and accelerated as a wave approached the area. While flooding ended up the main threat, embedded wind damage was observed in a few of the stronger storms.

Thunderstorm Wind in MARSHALL, INDIANA
From 18-JUL-07 22:24:00 to 18-JUL-07 22:25:00 (EST-5)
Location: ARGOS
Magnitude: 55.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A 150 year old barn was destroyed, as well as a 200 foot section of roof of adjacent work shop being ripped off. Trees were also reported down around Argos. Damage is estimated around $50,000.

Flash Flood in MARSHALL, INDIANA
From 18-JUL-07 23:38:00 to 19-JUL-07 04:00:00 (EST-5)
Location: PLYMOUTH
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: County Official

Several roads were closed in the southern part of the county by flowing water around 1 foot deep.

Flash Flood in ST. JOSEPH, INDIANA
From 18-JUL-07 23:44:00 to 19-JUL-07 04:00:00 (EST-5)
Location: MISHAWAKA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: County Official

Several roads in the city of Mishawaka were flooded and temporarily closed by flowing water, including Hickory road.

Thunderstorm Wind in NOBLE, INDIANA
From 18-JUL-07 20:40:00 to 18-JUL-07 20:41:00 (EST-5)
Location: WOLCOTTVILLE
Magnitude: 55.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

On the south side of Dallas Lake, the siding was blown off a cottage and a boat was blown against a tree and damaged. In addition, several trees were blown down.

Flash Flood in ALLEN, INDIANA
From 18-JUL-07 23:30:00 to 19-JUL-07 03:15:00 (EST-5)
Location: FT WAYNE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous streets in the city of Fort Wayne were flooded with up to 2.5 feet of flowing water in areas. No evacuations were needed, but roads were temporarily blocked until the waters subsided.

Thunderstorm Wind in NOBLE, INDIANA
From 18-JUL-07 21:02:00 to 18-JUL-07 21:03:00 (EST-5)
Location: LAOTTO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A large tree was blown down onto county road 68.

Flash Flood in KOSCIUSKO, INDIANA
From 18-JUL-07 23:31:00 to 19-JUL-07 04:00:00 (EST-5)
Location: WARSAW
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: County Official

Several roads in the northern part of the county, including the city of Warsaw, had up to a foot of flowing water on them. 5 roads in Warsaw were closed for a period of time.

Thunderstorm Wind in GRANT, INDIANA
From 19-JUL-07 00:40:00 to 19-JUL-07 00:41:00 (EST-5)
Location: SHADY HILLS
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: County Official

A semi was blown over at State Route 18 and Interstate 69. A steel shed was also blown over in the Marion area.

Thunderstorm Wind in NOBLE, INDIANA
From 18-JUL-07 20:53:00 to 18-JUL-07 20:54:00 (EST-5)
Location: WOLCOTTVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Large limbs were blown down on the northwest side of Wolcottville.

Thunderstorm Wind in LAGRANGE, INDIANA
From 18-JUL-07 22:00:00 to 18-JUL-07 22:01:00 (EST-5)
Location: VALENTINE
Magnitude: 60.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A three foot diameter oak tree was blown down onto a house and attached deck, causing estimated damage of around $25,000.

Thunderstorm Wind in MARSHALL, INDIANA
From 18-JUL-07 22:00:00 to 18-JUL-07 22:01:00 (EST-5)
Location: TYNER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported blown down northwest of Plymouth.

Thunderstorm Wind in LA PORTE, INDIANA
From 18-JUL-07 21:33:00 to 18-JUL-07 21:34:00 (CST-6)
Location: LA PORTE
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees up to 6 inches in diameter were blown down on the south side of Laporte.