A cluster of strong to severe thunderstorms developed in advance of an area of low pressure across southeast Iowa during the afternoon of May 10th.  The storms then developed into a squall line and raced east-southeast along a warm front draped across central Illinois during the late afternoon and early evening.  One tornado touched down along the line just south of Argenta in Macon County, while widespread wind damage was reported primarily along and south of I-72.  Heavy rainfall of 1.5 to 2.5 inches aggravated ongoing flooding across southeast Illinois, where numerous roads were closed due to high water south of I-70.

Thunderstorm Wind in MASON, ILLINOIS
From 10-MAY-17 17:28:00 to 10-MAY-17 17:33:00 (CST-6)
Location: FOREST CITY
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down.

Thunderstorm Wind in MASON, ILLINOIS
From 10-MAY-17 17:30:00 to 10-MAY-17 17:35:00 (CST-6)
Location: MANITO
Magnitude: 61.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were blown down.

Thunderstorm Wind in MORGAN, ILLINOIS
From 10-MAY-17 17:33:00 to 10-MAY-17 17:38:00 (CST-6)
Location: ARCADIA
Magnitude: 61.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Public

Several trees, roofs, and power poles were damaged.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-MAY-17 17:55:00 to 10-MAY-17 18:00:00 (CST-6)
Location: BERLIN
Magnitude: 61.00 EG
Property damage: 70.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power poles were blown down.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-MAY-17 18:11:00 to 10-MAY-17 18:16:00 (CST-6)
Location: MILDRED
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 6-inch diameter tree limb was blown down near Panera Bread.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-MAY-17 18:07:00 to 10-MAY-17 18:12:00 (CST-6)
Location: SPAULDING
Magnitude: 61.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two trees were blown down.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-MAY-17 18:25:00 to 10-MAY-17 18:30:00 (CST-6)
Location: ILES
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 5-foot diameter tree was blown onto a fence.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-MAY-17 18:25:00 to 10-MAY-17 18:30:00 (CST-6)
Location: SPRINGFIELD
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Several trees were blown down in Washington Park.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-MAY-17 18:35:00 to 10-MAY-17 18:40:00 (CST-6)
Location: CIMIC
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was blown down at the corner of Lewis and Second streets.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-MAY-17 18:42:00 to 10-MAY-17 18:47:00 (CST-6)
Location: PAWNEE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several tree branches were blown down across Pawnee, including some that blocked IL Route 014.

Thunderstorm Wind in DOUGLAS, ILLINOIS
From 10-MAY-17 19:33:00 to 10-MAY-17 19:38:00 (CST-6)
Location: VILLA GROVE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A power line was blown down.

Thunderstorm Wind in COLES, ILLINOIS
From 10-MAY-17 19:36:00 to 10-MAY-17 19:41:00 (CST-6)
Location: HUMBOLDT
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A semi truck was blown over on I-57 at mile marker 195.

Thunderstorm Wind in EDGAR, ILLINOIS
From 10-MAY-17 20:05:00 to 10-MAY-17 20:15:00 (CST-6)
Location: PARIS
Magnitude: 61.00 EG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread wind damage occurred across Paris.  Numerous trees were blown down or uprooted, including one that crushed a truck.  Power lines were blown down and minor roof and siding damage took place as well.

Thunderstorm Wind in CLARK, ILLINOIS
From 10-MAY-17 20:15:00 to 10-MAY-17 20:20:00 (CST-6)
Location: MARSHALL
Magnitude: 52.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous tree limbs and power lines were blown down across Marshall.  An awning was damaged.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 10-MAY-17 17:51:00 to 10-MAY-17 17:56:00 (CST-6)
Location: WASHBURN
Magnitude: 70.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A gustnado with estimated winds of 80-90mph damaged several trees just east of Washburn.  Tree limbs were blown down on two farms, and a gas grill and house shingles were damaged as well.

Thunderstorm Wind in PIATT, ILLINOIS
From 10-MAY-17 19:10:00 to 10-MAY-17 19:15:00 (CST-6)
Location: BEMENT
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree branches were blown down in Bement.

Flash Flood in EFFINGHAM, ILLINOIS
From 10-MAY-17 22:30:00 to 11-MAY-17 01:30:00 (CST-6)
Location: ALTAMONT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in southern Effingham County. Rainfall amounts ranged from 2.00 to 2.50 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed near Mason and Edgewood, and water covered parts of U.S. Highway 45 south of Watson to the Clay County line.

Flood in EFFINGHAM, ILLINOIS
From 11-MAY-17 01:30:00 to 11-MAY-17 06:45:00 (CST-6)
Location: ALTAMONT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in southern Effingham County. Rainfall amounts ranged from 2.00 to 2.50 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed near Mason and Edgewood, and water covered parts of U.S. Highway 45 south of Watson to the Clay County line. An additional 0.50 to 0.75 inch of rain during the early morning hours of May 11th kept flood waters from receding until daybreak.

Flash Flood in JASPER, ILLINOIS
From 10-MAY-17 23:00:00 to 11-MAY-17 01:30:00 (CST-6)
Location: LATONA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in southern Jasper County. Rainfall amounts ranged from 1.75 to 2.50 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed near Bogota, Sainte Marie, and West Liberty, and water covered parts of Illinois Route 130 between Newton and West Liberty.

Flood in JASPER, ILLINOIS
From 11-MAY-17 01:30:00 to 11-MAY-17 13:15:00 (CST-6)
Location: LATONA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in southern Jasper County. Rainfall amounts ranged from 1.75 to 2.50 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed near Bogota, Sainte Marie, and West Liberty, and water covered parts of Illinois Route 130 between Newton and West Liberty. An additional 0.50 to 0.75 inch of rain during the early morning hours of May 11th kept flood waters from receding until early in the afternoon.

Flash Flood in CLAY, ILLINOIS
From 10-MAY-17 22:30:00 to 11-MAY-17 01:30:00 (CST-6)
Location: CRUSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in northern Clay County. Rainfall amounts ranged from 1.50 to 2.00 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed from Bible Grove through Ingraham to Sailor Springs and Louisville. Parts of U.S. Highway 45 were covered with water from Louisville to the Effingham County line.

Flash Flood in RICHLAND, ILLINOIS
From 10-MAY-17 23:00:00 to 11-MAY-17 01:30:00 (CST-6)
Location: WAKEFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in northern Richland County. Rainfall amounts ranged from 2.00 to 2.50 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed from Wakefield through Dundas to Olney. The heaviest rain occurred near Dundas, where IL Route 130 was closed.

Flood in CLAY, ILLINOIS
From 11-MAY-17 01:30:00 to 11-MAY-17 13:15:00 (CST-6)
Location: CRUSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in northern Clay County. Rainfall amounts ranged from 1.50 to 2.00 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed from Bible Grove through Ingraham to Sailor Springs and Louisville. Parts of U.S. Highway 45 were covered with water from Louisville to the Effingham County line. An additional 0.50 to 0.75 inch of rain during the early morning hours of May 11th kept flood waters from receding until the early afternoon.

Flood in RICHLAND, ILLINOIS
From 11-MAY-17 01:30:00 to 11-MAY-17 19:15:00 (CST-6)
Location: WAKEFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in northern Richland County. Rainfall amounts ranged from 2.00 to 2.50 inches during the late evening of May 10th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed from Wakefield through Dundas to Olney. The heaviest rain occurred near Dundas, where IL Route 130 was closed. An additional 0.50 to 0.75 inch of rain during the early morning hours of May 11th kept flood waters from receding until early evening.

Flash Flood in CRAWFORD, ILLINOIS
From 11-MAY-17 00:00:00 to 11-MAY-17 03:00:00 (CST-6)
Location: PIERCEBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in southern Crawford County. Rainfall amounts ranged from 1.50 to 2.00 inches during the late evening of May 10th into the early morning of May 11th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed, particularly from Green Brier to Landes, where the heaviest rainfall occurred.

Flood in CRAWFORD, ILLINOIS
From 11-MAY-17 03:00:00 to 11-MAY-17 06:45:00 (CST-6)
Location: PIERCEBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in southern Crawford County. Rainfall amounts ranged from 1.50 to 2.00 inches during the late evening of May 10th into the early morning of May 11th in areas where ditches were already full of water and soils were saturated. Numerous rural roads were closed, particularly from Green Brier to Landes, where the heaviest rainfall occurred. An additional 0.50 inch of rain during the early morning hours of May 11th kept flood waters from receding until daybreak.

Flash Flood in LAWRENCE, ILLINOIS
From 11-MAY-17 00:00:00 to 11-MAY-17 03:00:00 (CST-6)
Location: CHAUNCEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in northern Lawrence County. Rainfall amounts ranged from 2.00 to 2.50 inches during the late evening of May 10th and very early morning of May 11th in areas where ditches were already full of water and soils were saturated. Numerous rural roads from Chauncey toward Birds, through Lawrenceville to Sumner were closed due to flooding. Several streets in Lawrenceville were also flooded during the morning hours.

Flood in LAWRENCE, ILLINOIS
From 11-MAY-17 03:00:00 to 11-MAY-17 13:15:00 (CST-6)
Location: CHAUNCEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The third heavy rain event to occur in less than two weeks resulted in rapid flash flooding in northern Lawrence County. Rainfall amounts ranged from 2.00 to 2.50 inches during the late evening of May 10th and very early morning of May 11th in areas where ditches were already full of water and soils were saturated. Numerous rural roads from Chauncey toward Birds, through Lawrenceville to Sumner were closed due to flooding. Several streets in Lawrenceville were also flooded during the morning hours. An additional 0.50 to 0.75 inch of rain during the early morning hours of May 11th kept flood waters from receding until early afternoon.

Tornado in MACON, ILLINOIS
From 10-MAY-17 18:49:00 to 10-MAY-17 18:50:00 (CST-6)
Location: ARGENTA
Tornado F-scale: EF0
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tornado briefly touched down near the Argenta exit from I-72 at mile marker 150 at 7:49 PM CDT.  Several pine trees were snapped before the tornado dissipated at 7:50 PM CDT.

Hail in SCHUYLER, ILLINOIS
From 10-MAY-17 16:25:00 to 10-MAY-17 16:30:00 (CST-6)
Location: CAMDEN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in SCHUYLER, ILLINOIS
From 10-MAY-17 16:45:00 to 10-MAY-17 16:50:00 (CST-6)
Location: RUSHVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MORGAN, ILLINOIS
From 10-MAY-17 17:33:00 to 10-MAY-17 17:38:00 (CST-6)
Location: ARCADIA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MORGAN, ILLINOIS
From 10-MAY-17 17:35:00 to 10-MAY-17 17:40:00 (CST-6)
Location: JACKSONVILLE ARPT
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in MASON, ILLINOIS
From 10-MAY-17 17:15:00 to 10-MAY-17 17:20:00 (CST-6)
Location: HAVANA
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were blown down.

Thunderstorm Wind in MASON, ILLINOIS
From 10-MAY-17 17:20:00 to 10-MAY-17 17:25:00 (CST-6)
Location: KILBOURNE
Magnitude: 61.00 EG
Property damage: 65.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Irrigation pivots were flipped and twisted.  Numerous trees were blown down and a 50-60 foot tall pine tree was snapped.

Thunderstorm Wind in MORGAN, ILLINOIS
From 10-MAY-17 17:25:00 to 10-MAY-17 17:30:00 (CST-6)
Location: CONCORD
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees and power lines were blown down.