A stalled frontal boundary draped from the Iowa-Missouri border into Illinois resulted in the development of showers and thunderstorms on June 1. After some peeks of sunshine during the early afternoon, severe thunderstorms erupted mainly along and south of Highway 34, producing large hail and wind gusts over 58 mph.  One lone storm in northern Stephenson County produced some damaging winds and a tornado near Orangeville, IL.  Heavy rains also produced some flash flooding in Hancock County Illinois.

Hail in WARREN, ILLINOIS
From 01-JUN-09 16:30:00 to 01-JUN-09 16:30:00 (CST-6)
Location: MONMOUTH MUNI ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCDONOUGH, ILLINOIS
From 01-JUN-09 16:40:00 to 01-JUN-09 16:40:00 (CST-6)
Location: ADAIR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter-sized hail fell in Adair, IL around 540 pm June 1.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 01-JUN-09 16:40:00 to 01-JUN-09 16:40:00 (CST-6)
Location: ADAIR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to be 60 mph in Adair, IL around 540 pm June 1.

Flash Flood in HANCOCK, ILLINOIS
From 01-JUN-09 18:45:00 to 01-JUN-09 20:45:00 (CST-6)
Location: WARSAW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rains resulted in some flash flooding during the evening of June 1 across parts of Hancock County Illinois.  A bridge on Conable Road about 5 miles north of Hamilton, IL was under flood waters.  In addition, the Bentley Blacktop was flooded and impassible just east of Bentley, IL.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 01-JUN-09 15:30:00 to 01-JUN-09 15:30:00 (CST-6)
Location: BUENA VISTA
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Wind gusts estimated to be 70 mph blew some farm equipment over in a nearby farm field about 3.5 miles southwest of Orangeville, IL around 430 pm June 1.  The equipment was laying to the south.  It was determined that downburst winds caused this damage.  Time estimated.

Tornado in STEPHENSON, ILLINOIS
From 01-JUN-09 15:30:00 to 01-JUN-09 15:31:00 (CST-6)
Location: BUENA VISTA
Tornado F-scale: EF0
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado briefly touched down about 2 miles southwest of Orangeville, IL around 430 pm June 1.  Several trees were snapped at the trunk.  Tall grasses along W Brush Creek Rd were laying down to the east.  A tin roof was blown off of a shed to the east.  A witness inside a barn described windows blown in, paint sandblasted off walls, and hay blowing out the west door being carried north of barn.  An empty grain wagon was pushed 25 yards northeast of barn.  Four calf huts were picked up by the wind, moved, and one was apparently lofted a half mile down the road to the northeast.  Sheet metal was bent and twisted inside a grain bin.  A hay conveyor rolled twice.  A witness described heavy rain, then mud preceding wind.  Another witness described seeing a funnel cloud shape before experiencing strong winds.  They were unable to determine if there was rotation due to the wind speed and rain.  A pine tree was uprooted along with small branches down.  Time estimated.

Hail in HENDERSON, ILLINOIS
From 01-JUN-09 16:06:00 to 01-JUN-09 16:06:00 (CST-6)
Location: BIG RIVER ST FOREST
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HANCOCK, ILLINOIS
From 01-JUN-09 16:25:00 to 01-JUN-09 16:25:00 (CST-6)
Location: BASCO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter-sized hail fell about 1 mile west of Basco, IL around 525 pm June 1.

Hail in WARREN, ILLINOIS
From 01-JUN-09 16:26:00 to 01-JUN-09 16:26:00 (CST-6)
Location: ELEANOR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 01-JUN-09 15:30:00 to 01-JUN-09 15:30:00 (CST-6)
Location: BUENA VISTA
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A large tree branch fell down on car about 1 mile southwest of Orangeville, IL around 430 pm June 1.  A witness reported very heavy rain with about a 20 second long duration of high winds.  There was a lot of scattered small debris mixed in with the rain and wind that sounded like popcorn hitting the side of the house.  It was determined that this damage was caused by stright-line winds.  Time estimated.

Thunderstorm Wind in WARREN, ILLINOIS
From 01-JUN-09 17:04:00 to 01-JUN-09 17:04:00 (CST-6)
Location: MONMOUTH
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds estimated to be 60 mph blew some trees down in Monmouth, IL around 604 pm June 1.  One tree fell onto a car.