A wave on a northward moving warm front produced scattered thunderstorms along the boundary.  Low level shear was favorable for severe weather and tornadoes.

Thunderstorm Wind in WARREN, ILLINOIS
From 16-JUL-15 18:42:00 to 16-JUL-15 18:42:00 (CST-6)
Location: ROSEVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong and gusty thunderstorm winds brought several tree limbs and roof shingles down.  The tree limbs were about 2 inches in diameter and approximately 15 feet in length.  This was a delayed report.  The time of the event was estimated by local radar data.

Flash Flood in WHITESIDE, ILLINOIS
From 16-JUL-15 19:40:00 to 16-JUL-15 20:40:00 (CST-6)
Location: DENROCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many streets were reported to be flooded with several inches of water in the town of  Prophetstown.

Flash Flood in WARREN, ILLINOIS
From 16-JUL-15 19:45:00 to 16-JUL-15 20:45:00 (CST-6)
Location: MONMOUTH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous photos of water flowing down streets, images were received via social media.

Tornado in WARREN, ILLINOIS
From 16-JUL-15 17:49:00 to 16-JUL-15 17:51:00 (CST-6)
Location: SMITHSHIRE
Tornado F-scale: EF1
Property damage: 2.00K
Reported by: NWS Storm Survey

Tornado strength rating of EF-1.  Maximum estimated wind of 90 MPH.  Tornado path length of 1.41 miles.  Tornado path maximum width of 50 yards.  Tornado start time roughly 649 PM CDT.  Tornado path start location roughly 2.4 MILES north of Smithshire IL. Tornado end time of roughly 651 PM CDT.  Tornado path end location of 1.9 miles South of Kirkwood IL.  Trees and outbuildings damaged and a semi blown over on Highway 34.

Tornado in ROCK ISLAND, ILLINOIS
From 16-JUL-15 18:00:00 to 16-JUL-15 18:03:00 (CST-6)
Location: PORT BYRON
Tornado F-scale: EF1
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF1 tornado with estimated peak wind of 105 mph damaged trees and some homes along 94th Ave.  Path length, 1.2 miles.Path width about 200 yards.  The tornado began at 7 pm 0.5 miles southeast of Port Byron and lifted around 703 pm 1.3 miles east northeast of Port Byron.

Tornado in HENDERSON, ILLINOIS
From 16-JUL-15 17:09:00 to 16-JUL-15 17:12:00 (CST-6)
Location: LONE TREE
Tornado F-scale: EF1
Property damage: 25.00K
Reported by: NWS Storm Survey

An EF1 tornado with maximum winds estimated at 95 mph touched down  1.1 miles east of Lone Tree, IL.  The tornado traveled 0.84 miles and lifted 1.8 miles east northeast of Lone Tree.  The maximum path width was about 100 yards.  Along the path, trees and outbuildings were destroyed.

Tornado in WARREN, ILLINOIS
From 16-JUL-15 18:09:00 to 16-JUL-15 18:13:00 (CST-6)
Location: KIRKWOOD
Tornado F-scale: EF2
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF2 tornado with maximum wind estimated at 120 MPH touched down 2.6 miles east of Kirkwood, IL.  The tornado traveled approximately 1.7 miles and lifted 3.2 miles southwest of Monmouth, IL. The maximum path width was about 300 yards. Along the path, the tornado destroyed a grain bin and a cattle barn at Shauman's Corner about 6.4 miles southwest of Monmouth on US 34.  Power poles were also snapped.

Tornado in WARREN, ILLINOIS
From 16-JUL-15 18:13:00 to 16-JUL-15 18:34:00 (CST-6)
Location: NEMO
Tornado F-scale: EF2
Property damage: 1500.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-2 tornado with winds estimated at 125 mph tracked about 6 miles from east of Monmouth through the town of Cameron before lifting. A maximum path width of 700 yards was estimated in Cameron.  The tornado began at 713 pm CDT 1 mile southeast of Monmouth and lifted at 734 pm 2.2 miles east of Cameron.  The most intense damage occurred in Cameron where at least 3 homes were unroofed, numerous garages and outbuildings were destroyed, and a large grain bin at the elevator was destroyed.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 16-JUL-15 19:03:00 to 16-JUL-15 19:03:00 (CST-6)
Location: MACOMB
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in WHITESIDE, ILLINOIS
From 16-JUL-15 19:48:00 to 16-JUL-15 19:49:00 (CST-6)
Location: STERLING ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An EF0 tornado with peak winds estimated at 80 mph touched down 4 miles south of Rock Falls. It traveled about 0.55 miles in open country.  According to spotter account and video, it was on the ground for about 1 minute 20 seconds.  No damage was reported.