A seasonally strong low pressure system lifted northeast from northern Kansas to extreme western Iowa, on March 31, 2007. A warm front moved northward into northeast Iowa followed by a cold front sweeping across eastern Iowa into Illinois. These frontal boundaries triggered thunderstorms, and with sufficient low level wind shear, allowed for many to rotate. Most of the thunderstorms produced large hail and damaging wind.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 31-MAR-07 17:10:00 to 31-MAR-07 17:10:00 (CST-6)
Location: WOODBINE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriffs department reported many trees down, some blocking roads in the Woodbine area.

Hail in ROCK ISLAND, ILLINOIS
From 31-MAR-07 16:53:00 to 31-MAR-07 16:53:00 (CST-6)
Location: ANDALUSIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported hail the size of quarters.

Thunderstorm Wind in MERCER, ILLINOIS
From 31-MAR-07 16:30:00 to 31-MAR-07 16:30:00 (CST-6)
Location: ALEDO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriffs department reported at least one power pole blown down just north of Aledo, and numerous small branches down around the Aledo area.

Thunderstorm Wind in CARROLL, ILLINOIS
From 31-MAR-07 17:05:00 to 31-MAR-07 17:05:00 (CST-6)
Location: SAVANNA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down across a road 1N Savanna.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 31-MAR-07 17:10:00 to 31-MAR-07 17:10:00 (CST-6)
Location: GALENA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriffs department reported many large trees down, some blocking roads in the Galena area.

Thunderstorm Wind in PUTNAM, ILLINOIS
From 31-MAR-07 19:25:00 to 31-MAR-07 19:25:00 (CST-6)
Location: HENNEPIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriffs department reported several power lines down along with some smaller branches in the Hennepin area.

Hail in HENRY, ILLINOIS
From 31-MAR-07 15:00:00 to 31-MAR-07 15:00:00 (CST-6)
Location: ATKINSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement estimated hail the size of pennies.

Thunderstorm Wind in BUREAU, ILLINOIS
From 31-MAR-07 19:30:00 to 31-MAR-07 19:30:00 (CST-6)
Location: TISKILWA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriffs department reported a tree down across the Tiskilwa Bottoms Road.

Thunderstorm Wind in HENDERSON, ILLINOIS
From 31-MAR-07 16:05:00 to 31-MAR-07 16:05:00 (CST-6)
Location: STRONGHURST
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated wind gusts to 60 mph blew the door off a machine shed.

Thunderstorm Wind in HENDERSON, ILLINOIS
From 31-MAR-07 16:30:00 to 31-MAR-07 16:30:00 (CST-6)
Location: CARMAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated wind gusts to 60 mph.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 31-MAR-07 17:59:00 to 31-MAR-07 17:59:00 (CST-6)
Location: PRAIRIE CITY
Magnitude: 58.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated wind gusts to 67 mph.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 31-MAR-07 17:10:00 to 31-MAR-07 17:10:00 (CST-6)
Location: ELIZABETH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sheriffs department reported many trees down, some blocking roads in the Elizabeth area.