Powerful storms developed over southern Lake Michigan and moved south across northwest Indiana during the evening hours of August 15th.

Lightning in PORTER, INDIANA
From 15-AUG-07 20:21:00 to 15-AUG-07 20:21:00 (CST-6)
Location: CHESTERTON
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A house was struck by lightning, which ignited a fire in the attic.  The house suffered extensive damage, mainly from water.

Flash Flood in PORTER, INDIANA
From 15-AUG-07 20:25:00 to 15-AUG-07 23:00:00 (CST-6)
Location: VALPARAISO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Roadways covered by water.

Flood in LAKE, INDIANA
From 15-AUG-07 21:08:00 to 15-AUG-07 23:30:00 (CST-6)
Location: MERRILLVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Five inches of water at 161st and Route 65.

Hail in LAKE, INDIANA
From 15-AUG-07 19:49:00 to 15-AUG-07 19:51:00 (CST-6)
Location: GRIFFITH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail reported at the intersection of Main and Cline Avenues.

Hail in LAKE, INDIANA
From 15-AUG-07 19:59:00 to 15-AUG-07 20:01:00 (CST-6)
Location: HOBART
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in LAKE, INDIANA
From 15-AUG-07 19:59:00 to 15-AUG-07 20:01:00 (CST-6)
Location: CROWN PT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LAKE, INDIANA
From 15-AUG-07 20:02:00 to 15-AUG-07 20:04:00 (CST-6)
Location: MERRILLVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny size hail reported at US 30 and Broadway.

Hail in LAKE, INDIANA
From 15-AUG-07 20:04:00 to 15-AUG-07 20:06:00 (CST-6)
Location: MERRILLVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in LAKE, INDIANA
From 15-AUG-07 20:03:00 to 15-AUG-07 20:07:00 (CST-6)
Location: HOBART
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golfball size hail reported at 61 Street, 3 miles east of Interstate 65.

Hail in PORTER, INDIANA
From 15-AUG-07 20:12:00 to 15-AUG-07 20:14:00 (CST-6)
Location: HEBRON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PORTER, INDIANA
From 15-AUG-07 20:14:00 to 15-AUG-07 20:16:00 (CST-6)
Location: VALPARAISO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size hail reported on the west side of Valparaiso.

Hail in PORTER, INDIANA
From 15-AUG-07 20:24:00 to 15-AUG-07 20:26:00 (CST-6)
Location: VALPARAISO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail reported at Sweetbriar Road.

Thunderstorm Wind in LAKE, INDIANA
From 15-AUG-07 19:50:00 to 15-AUG-07 19:50:00 (CST-6)
Location: (GYY)GARY MUNI ARPT
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Wind equipment at Gary Airport measured a gust to 69 mph.

Thunderstorm Wind in PORTER, INDIANA
From 15-AUG-07 20:05:00 to 15-AUG-07 20:35:00 (CST-6)
Location: HURLBURT
Magnitude: 85.00 EG
Property damage: 2.50M
Crop damage: 0.00K
Reported by: NWS Storm Survey

Widespread wind damage from near Lakes of The Four Seasons along the Lake/Porter County line, through central Porter County, ending southeast of Kouts, near the Porter LaPorte County line.  Numerous trees were uprooted and blown over.  At least 50 houses across the county were damaged.  The most intense damage was near Kouts where large hardwood trees were uprooted or snapped.  Twenty three large metal truss towers for high tension power lines were blown down along a four mile path east of Kouts.  Winds with the most intense damage were estimated at 100 to 120 mph.

Thunderstorm Wind in LAKE, INDIANA
From 15-AUG-07 19:35:00 to 15-AUG-07 20:05:00 (CST-6)
Location: EAST CHICAGO
Magnitude: 85.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

Widespread wind damage occurred in a three to five mile wide path from East Chicago and Gary in northeast Lake County through much of central Lake County to near Winfield and the Lake Porter County line.  Numerous large trees uprooted and blown over, some falling onto buildings and cars, causing damage to roofs, siding and windows.  Numerous power lines blown down.  Trees were blown down on the Indiana Toll Road near milemarker 5 and on Interstate 94 near Broadway.  A semi-trailer was blown over at US 30 and Indiana 51.  Another semi-trailer was blown over at US 30 and Interstate 65.  A large indoor horse riding arena was completed destroyed, but no horses were injured.  A Merrillville police car was heavily damaged by hail.  A homeless shelter in Gary suffered significant roof damage.  The most intense damage was consistent with winds in excess of 100 mph.

Hail in PORTER, INDIANA
From 15-AUG-07 20:30:00 to 15-AUG-07 20:32:00 (CST-6)
Location: BOONE GROVE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Half dollar size hail in Lake of The Four Seasons.

Hail in LAKE, INDIANA
From 15-AUG-07 19:44:00 to 15-AUG-07 19:46:00 (CST-6)
Location: HIGHLAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter