Strong to severe thunderstorms produced numerous reports of hail with a few reports reaching severe criteria.

Hail in WINNEBAGO, ILLINOIS
From 17-MAR-12 05:35:00 to 17-MAR-12 05:40:00 (CST-6)
Location: ROCKFORD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny size hail lasted for about five minutes on the northeast side of Rockford.

Hail in WINNEBAGO, ILLINOIS
From 17-MAR-12 05:36:00 to 17-MAR-12 05:38:00 (CST-6)
Location: LOVES PARK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in WINNEBAGO, ILLINOIS
From 17-MAR-12 05:42:00 to 17-MAR-12 05:44:00 (CST-6)
Location: ROCKFORD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in BOONE, ILLINOIS
From 17-MAR-12 06:10:00 to 17-MAR-12 06:12:00 (CST-6)
Location: BELVIDERE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in MCHENRY, ILLINOIS
From 17-MAR-12 07:08:00 to 17-MAR-12 07:16:00 (CST-6)
Location: MARENGO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail ranging from pea to nickel size fell for several minutes over Marengo.

Hail in BOONE, ILLINOIS
From 17-MAR-12 06:35:00 to 17-MAR-12 06:37:00 (CST-6)
Location: BELVIDERE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DE KALB, ILLINOIS
From 17-MAR-12 07:53:00 to 17-MAR-12 07:54:00 (CST-6)
Location: SYCAMORE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCHENRY, ILLINOIS
From 17-MAR-12 08:45:00 to 17-MAR-12 08:48:00 (CST-6)
Location: WOODSTOCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCHENRY, ILLINOIS
From 17-MAR-12 08:49:00 to 17-MAR-12 08:50:00 (CST-6)
Location: WOODSTOCK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MCHENRY, ILLINOIS
From 17-MAR-12 09:06:00 to 17-MAR-12 09:08:00 (CST-6)
Location: WOODSTOCK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCHENRY, ILLINOIS
From 17-MAR-12 09:20:00 to 17-MAR-12 09:22:00 (CST-6)
Location: UNION
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported near Olson and Hemmingsen Roads.

Hail in WILL, ILLINOIS
From 17-MAR-12 17:07:00 to 17-MAR-12 17:08:00 (CST-6)
Location: BRAIDWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Lightning in MCHENRY, ILLINOIS
From 17-MAR-12 08:23:00 to 17-MAR-12 08:23:00 (CST-6)
Location: WOODSTOCK
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck a satellite dish on the roof of a building of condos, which started a fire in the attic.  Only minor damage was reported and the condo remained habitable.

Hail in WINNEBAGO, ILLINOIS
From 17-MAR-12 05:40:00 to 17-MAR-12 05:42:00 (CST-6)
Location: LOVES PARK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flood in MCHENRY, ILLINOIS
From 17-MAR-12 09:00:00 to 17-MAR-12 12:00:00 (CST-6)
Location: HARTLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain caused minor flooding in and around Woodstock.  Four to five inches of standing water was reported on roadways.  The parking lot at the Woodstock Library was about half covered with water.  Standing water was reported in fields in Bull Valley.  Storm total rainfall of 1.78 inches was reported in Woodstock.