A line of severe storms moved through the region.  There were numerous reports of large hail and damaging winds, as well as a couple of tornadoes and flash flooding.

Tornado in MACOUPIN, ILLINOIS
From 20-MAY-13 21:14:00 to 20-MAY-13 21:15:00 (CST-6)
Location: MT OLIVE
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down in the downtown portion of Mt. Olive and traveled to the east.  The damage path was 4 blocks long and ranged from 50 to 75 yards wide.  The second story of a brick building was blown off.  Large sections of several roofs were blown 2 blocks to the north.  A historic 2 story home had the roof blown off and windows were blown out of several homes and businesses.  Three people sustained minor injuries.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 20-MAY-13 21:12:00 to 20-MAY-13 21:13:00 (CST-6)
Location: MT OLIVE
Magnitude: 91.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm winds caused minor damage to the fire station roof.  A small shed behind the fire station was destroyed.  Also, several large trees were uprooted and a couple others were snapped off.  A small ham radio tower behind a house was bent.

Thunderstorm Wind in PIKE, ILLINOIS
From 20-MAY-13 18:30:00 to 20-MAY-13 18:32:00 (CST-6)
Location: EAST HANNIBAL
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: NWS Employee

A line of severe thunderstorms moved through northern portions of Pike County.  Considerable wind damage was noted along the I-72 corridor from the Mississippi River to the I-72/I-172 interchange.  There was a great deal of tree damage on both sides of the road where it extended from the eastern bank of the river to the levee.  Varying sizes of limbs and branches were broken, twisted and dangling.  The damage extended well beyond the levee.  Three residences on the north side of the interstate near the first Illinois exit had minor roof damage.  Further east, the winds destroyed a large machine shed at a farmstead.  The next farm along the north side of the road suffered the worst damage.  This property consisted of 7 small grain bins and 4 large ones.  The smaller bins are set to the west of the larger ones.  All 11 grain bins were dented on the southwest side to some degree.  By far the worst was the southwestern most large grain bin.  It was completely crushed to the point where it is a total loss.  The interstate bends to the northeast just past the farm with the grain bins.  There was some tree damage to the next two residences on the south side of the interstate prior to the interchange with I-172.

Thunderstorm Wind in PIKE, ILLINOIS
From 20-MAY-13 18:35:00 to 20-MAY-13 18:35:00 (CST-6)
Location: HULL
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ADAMS, ILLINOIS
From 20-MAY-13 18:32:00 to 20-MAY-13 18:35:00 (CST-6)
Location: FALL CREEK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds caused minor damage to a garage in Payson.  Also, several power poles were snapped and a couple of trees uprooted in Payson.

Hail in ADAMS, ILLINOIS
From 20-MAY-13 18:45:00 to 20-MAY-13 18:45:00 (CST-6)
Location: LIBERTY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MACOUPIN, ILLINOIS
From 20-MAY-13 21:08:00 to 20-MAY-13 21:08:00 (CST-6)
Location: BUNKER HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 20-MAY-13 21:10:00 to 20-MAY-13 21:10:00 (CST-6)
Location: STAUNTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew off the decorative steel portion of a grocery store roof in Staunton.  The main roof remained intact with just minor leaks into the store below.  Also, several trees and power lines were blown down around town.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 20-MAY-13 21:10:00 to 20-MAY-13 21:10:00 (CST-6)
Location: DORCHESTER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds snapped off a two foot diameter tree at its base.

Thunderstorm Wind in MADISON, ILLINOIS
From 20-MAY-13 21:20:00 to 20-MAY-13 21:20:00 (CST-6)
Location: EDWARDSVILLE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MADISON, ILLINOIS
From 20-MAY-13 21:35:00 to 20-MAY-13 21:35:00 (CST-6)
Location: MARYVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RANDOLPH, ILLINOIS
From 20-MAY-13 23:06:00 to 20-MAY-13 23:08:00 (CST-6)
Location: CHESTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in MACOUPIN, ILLINOIS
From 20-MAY-13 21:25:00 to 21-MAY-13 03:00:00 (CST-6)
Location: ATWATER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to 4 inches of rain fell in a short amount of time causing flash flooding.  Several roads were flooded, especially in Carlinville and Girard.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 20-MAY-13 20:32:00 to 20-MAY-13 20:35:00 (CST-6)
Location: PLAINVIEW
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several large tree limbs in Plainview.