A severe weather outbreak occurred on February 28th and lasted into the early morning hours of March 1st 2017.  Four tornadoes were documented to have occurred in the National Weather Service St. Louis County Warning Area, including a portion of the long track tornado that caused damage north of Perryville, MO.   Hail and wind reports were noted with many of the storms.

Hail in JERSEY, ILLINOIS
From 28-FEB-17 16:18:00 to 28-FEB-17 16:18:00 (CST-6)
Location: DOW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CLAIR, ILLINOIS
From 28-FEB-17 17:25:00 to 28-FEB-17 17:29:00 (CST-6)
Location: DUPO
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in MONROE, ILLINOIS
From 28-FEB-17 17:40:00 to 28-FEB-17 18:00:00 (CST-6)
Location: MAEYSTOWN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A swath of large hail, up to golfball size, fell across Monroe County between Maeystown and Hecker.

Thunderstorm Wind in MONROE, ILLINOIS
From 28-FEB-17 18:00:00 to 28-FEB-17 18:00:00 (CST-6)
Location: HECKER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorms winds blew down a large tree across a road in town.

Hail in MONROE, ILLINOIS
From 28-FEB-17 17:55:00 to 28-FEB-17 17:55:00 (CST-6)
Location: IVY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in MADISON, ILLINOIS
From 28-FEB-17 17:35:00 to 28-FEB-17 17:36:00 (CST-6)
Location: COLLINSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several trees and power lines in Collinsville and just south of Pontoon Beach. One house sustained siding damage from the winds.

Hail in MADISON, ILLINOIS
From 28-FEB-17 17:35:00 to 28-FEB-17 17:50:00 (CST-6)
Location: COLLINSVILLE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wide swath of large hail, up to two inches in diameter, fell across Madison County from the Collinsville/Pontoon Beach area northeastward through Maryville, Glen Carbon, Edwardsville, Troy and Marine.

Hail in ST. CLAIR, ILLINOIS
From 28-FEB-17 18:11:00 to 28-FEB-17 18:11:00 (CST-6)
Location: NEW ATHENS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONROE, ILLINOIS
From 28-FEB-17 18:25:00 to 28-FEB-17 18:25:00 (CST-6)
Location: WATERLOO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in RANDOLPH, ILLINOIS
From 28-FEB-17 18:13:00 to 28-FEB-17 18:14:00 (CST-6)
Location: RED BUD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 28-FEB-17 17:35:00 to 28-FEB-17 17:35:00 (CST-6)
Location: EAST SWANSEA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a utility pole on the northwest side of town.

Tornado in RANDOLPH, ILLINOIS
From 28-FEB-17 20:12:00 to 28-FEB-17 20:18:00 (CST-6)
Location: ROCKWOOD
Tornado F-scale: EF2
Reported by: NWS Storm Survey

The tornado moved out of Perry County (MO-WFO Paducah's forecast area) across the Mississippi River into far southern Randolph County (IL) south of Rockwood.  The tornado caused damage to trees and snapped 7 power poles on IL Route 3. It continued to move to the northeast, causing extensive tree damage along Gun Club Road.  The damage was rated EF2.  The tornado continued northeast into Jackson County (IL) which is serviced by National Weather Service Paducah. This segment of the tornado (Randolph County) was rated EF2 with a path length of 2.94 miles and a max path width of 700 yards. No injuries or deaths were reported in Randolph County. The entire tornado was rated EF4. It's path length was 50 miles with a max path width of 1056 yards (0.6 of a mile). One death and 12 injuries were reported with this tornado.

Hail in ADAMS, ILLINOIS
From 28-FEB-17 20:57:00 to 28-FEB-17 20:57:00 (CST-6)
Location: PAYSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BROWN, ILLINOIS
From 28-FEB-17 21:25:00 to 28-FEB-17 21:30:00 (CST-6)
Location: MT STERLING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in BROWN, ILLINOIS
From 28-FEB-17 21:33:00 to 28-FEB-17 21:34:00 (CST-6)
Location: VERSAILLES
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado first touched down on the far west side of Versailles where it caused minor tree damage.  The tornado traveled northeast and impacted a house which sustained roof damage. On the other side of the road, two single wide mobile home trailers were overturned.  Damage at this location was rated high end EF1.  Farther to the northeast, more substantial tree damage occurred.  Several mature trees were topped, split and snapped at various heights above the ground.  The surrounding structures sustained corresponding roof, siding and fascia damage.  Damage was also rated high end EF1 along this portion of the track.  The tornado continued northeast and crossed Illinois Route 99 and caused additional minor tree damage.  The tornado moved northeast through the far northeast portion of town causing additional EF0 tree, roof and fascia damage to structures.  The tornado dissipated as it moved out of the northeast corner of Versailles. Overall, the tornado was rated EF1 with a path length of 0.66 miles and a maximum path width of 50 yards.