Alert archive / Illinois / Tornado Warnings in 2025

Tornado Warning 53, NWS St. Louis, MO

April 20, 20254 counties in Illinois

NWS St. Louis, MO issued this tornado warning at Apr 20, 2025, 8:38 PM CDT for 4 counties in Illinois. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 20, 2025, 8:38 PM CDT (01:38 UTC)
Expired: Apr 20, 2025, 9:16 PM CDT
In force: 38 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Bond County, IL, Clinton County, IL, Madison County, IL, Saint Clair County, IL

The radar

The St Louis radar (KLSX), 102 km from the middle of the area, began a volume at 01:39 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 20, 3:41 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.6 hours before the alert went out and 184 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 182 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 377 m²/s²
0-3 km storm-relative helicity: 580 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

951 
WFUS53 KLSX 210138
TORLSX
ILC005-027-119-163-210230-
/O.NEW.KLSX.TO.W.0053.250421T0138Z-250421T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
838 PM CDT Sun Apr 20 2025

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Bond County in south central Illinois...
  Clinton County in south central Illinois...
  Southeastern Madison County in southwestern Illinois...
  Northeastern Saint Clair County in southwestern Illinois...

* Until 930 PM CDT.

* At 838 PM CDT, severe thunderstorms capable of producing a tornado 
  were located along a line from near St. Jacob to 6 miles south of 
  New Memphis, or along a line from near Troy to 10 miles south of 
  New Baden, moving northeast at 60 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught
           without shelter. Mobile homes will be damaged or
           destroyed. Damage to roofs, windows and vehicles will
           occur. Tree damage is likely.

* Locations impacted include...
  Collinsville, Highland, Troy, Maryville, Greenville, Breese, 
  Lebanon, New Baden, Carlyle, Trenton, Aviston, St. Rose, 
  Germantown, Albers, St. Jacob, Beckemeyer, Marine, Pocahontas, 
  Mulberry Grove and Tamalco.

This includes the following State Parks...
	Carlyle Lake Recreational Area.

This includes the following highways...
	Interstate 64 in Illinois between exits 27 and 34.
	Interstate 70 in Illinois between exits 21 and 52.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built 
building away from windows. If you are outdoors, in a mobile home, 
or in a vehicle, move to the closest substantial shelter and protect 
yourself from flying debris.

Tornadoes are difficult to observe at night. Take cover now!

&&

LAT...LON 3871 8999 3903 8941 3903 8925 3874 8925
      3874 8914 3858 8914 3849 8941 3850 8943
      3847 8948 3847 8961 3840 8973 3860 8978
TIME...MOT...LOC 0138Z 238DEG 52KT 3873 8982 3861 8971 3839 8971

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Elmore

4 follow-up statements

915 
WWUS53 KLSX 210151
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
851 PM CDT Sun Apr 20 2025

ILC163-210201-
/O.CAN.KLSX.TO.W.0053.000000T0000Z-250421T0230Z/
Saint Clair IL-
851 PM CDT Sun Apr 20 2025

...TORNADO WARNING IS CANCELLED FOR NORTHEASTERN SAINT CLAIR 
COUNTY...

The storms which prompted the warning have moved out of the area. 
Therefore, the warning has been cancelled. However, gusty winds are 
still possible with these thunderstorms.

&&

LAT...LON 3875 8992 3903 8941 3903 8925 3899 8926
      3874 8925 3874 8914 3858 8914 3851 8935
      3852 8936 3851 8936 3849 8941 3850 8943
      3847 8948 3848 8957 3847 8961 3842 8970
      3866 8971 3866 8987
TIME...MOT...LOC 0138Z 238DEG 52KT 3874 8982 3861 8970 3839 8971

$$


ILC005-027-119-210230-
/O.CON.KLSX.TO.W.0053.000000T0000Z-250421T0230Z/
Bond IL-Clinton IL-Madison IL-
851 PM CDT Sun Apr 20 2025

...TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR BOND AND 
CLINTON COUNTIES IN SOUTH CENTRAL ILLINOIS AND SOUTHEASTERN MADISON 
COUNTY IN SOUTHWESTERN ILLINOIS...

At 851 PM CDT, severe thunderstorms capable of producing a tornado 
were located along a line from near Pocahontas to near Okawville, or 
along a line from 6 miles northeast of Highland to 9 miles south of 
Breese, moving northeast at 60 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed.
         Damage to roofs, windows and vehicles will occur. Tree
         damage is likely.

Locations impacted include...
  Highland, Troy, Greenville, Breese, New Baden, Carlyle, Trenton, 
  Aviston, St. Rose, Germantown, Albers, St. Jacob, Beckemeyer, 
  Marine, Pocahontas, Mulberry Grove, Tamalco, Beaver Creek, 
  Jamestown and Reno.

This includes the following State Parks...
	Carlyle Lake Recreational Area.

This includes the following highways...
	Interstate 64 in Illinois near exit 34.
	Interstate 70 in Illinois between exits 21 and 52.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built 
building away from windows. If you are outdoors, in a mobile home, 
or in a vehicle, move to the closest substantial shelter and protect 
yourself from flying debris.

Tornadoes are difficult to observe at night. Take cover now!

&&

LAT...LON 3875 8992 3903 8941 3903 8925 3899 8926
      3874 8925 3874 8914 3858 8914 3851 8935
      3852 8936 3851 8936 3849 8941 3850 8943
      3847 8948 3848 8957 3847 8961 3842 8970
      3866 8971 3866 8987
TIME...MOT...LOC 0138Z 238DEG 52KT 3874 8982 3861 8970 3839 8971

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Elmore

887 
WWUS53 KLSX 210201
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
901 PM CDT Sun Apr 20 2025

ILC005-027-119-210230-
/O.CON.KLSX.TO.W.0053.000000T0000Z-250421T0230Z/
Bond IL-Clinton IL-Madison IL-
901 PM CDT Sun Apr 20 2025

...TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR BOND AND 
CLINTON COUNTIES IN SOUTH CENTRAL ILLINOIS AND EAST CENTRAL MADISON 
COUNTY IN SOUTHWESTERN ILLINOIS...

At 901 PM CDT, severe thunderstorms capable of producing a tornado 
were located along a line from near Pocahontas to near Beckemeyer, 
or along a line from 7 miles west of Greenville to 6 miles south of 
Carlyle, moving northeast at 50 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed.
         Damage to roofs, windows and vehicles will occur. Tree
         damage is likely.

Locations impacted include...
  Highland, Greenville, Breese, Carlyle, Aviston, St. Rose, 
  Germantown, Albers, Beckemeyer, Pocahontas, Mulberry Grove, 
  Tamalco, Beaver Creek, Jamestown, Boulder, Woburn, Reno, Shattuc, 
  Pleasant Mound and Pierron.

This includes the following State Parks...
	Carlyle Lake Recreational Area.

This includes Interstate 70 in Illinois between exits 24 and 52.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built 
building away from windows. If you are outdoors, in a mobile home, 
or in a vehicle, move to the closest substantial shelter and protect 
yourself from flying debris.

Tornadoes are difficult to observe at night. Take cover now!

&&

LAT...LON 3903 8941 3903 8925 3899 8926 3874 8925
      3874 8914 3858 8914 3851 8935 3852 8936
      3851 8936 3849 8941 3850 8943 3847 8948
      3848 8949 3848 8957 3847 8961 3874 8960
      3875 8972 3882 8979
TIME...MOT...LOC 0151Z 237DEG 43KT 3882 8965 3870 8953 3848 8954

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Elmore

210 
WWUS53 KLSX 210208
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
908 PM CDT Sun Apr 20 2025

ILC119-210218-
/O.CAN.KLSX.TO.W.0053.000000T0000Z-250421T0230Z/
Madison IL-
908 PM CDT Sun Apr 20 2025

...TORNADO WARNING IS CANCELLED FOR EAST CENTRAL MADISON COUNTY IN 
SOUTHWESTERN ILLINOIS...

The storms which prompted the warning have moved out of the area. 
Therefore, the warning has been cancelled. However, gusty winds are 
still possible with these thunderstorms.

A Tornado Watch remains in effect until 1100 PM CDT for a portion of 
southwest Illinois.

&&

LAT...LON 3878 8945 3894 8947 3903 8925 3899 8926
      3874 8925 3874 8914 3858 8914 3851 8935
      3852 8936 3851 8936 3849 8941 3850 8943
TIME...MOT...LOC 0201Z 237DEG 43KT 3889 8952 3876 8940 3855 8941

$$


ILC005-027-210230-
/O.CON.KLSX.TO.W.0053.000000T0000Z-250421T0230Z/
Bond IL-Clinton IL-
908 PM CDT Sun Apr 20 2025

...TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR EASTERN 
BOND AND NORTHEASTERN CLINTON COUNTIES...

At 908 PM CDT, severe thunderstorms capable of producing a tornado 
were located along a line from over Woburn to near Carlyle, or along 
a line from near Greenville to near Carlyle, moving northeast at 50 
mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed.
         Damage to roofs, windows and vehicles will occur. Tree
         damage is likely.

Locations impacted include...
  Greenville, Carlyle, Beckemeyer, Mulberry Grove, Tamalco, Beaver 
  Creek, Boulder, Shattuc, Woburn, Pleasant Mound, Hoffman, 
  Keyesport, Smithboro, Huey, Dudleyville, Ferrin and Posey.

This includes the following State Parks...
	Carlyle Lake Recreational Area.

This includes Interstate 70 in Illinois between exits 41 and 52.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built 
building away from windows. If you are outdoors, in a mobile home, 
or in a vehicle, move to the closest substantial shelter and protect 
yourself from flying debris.

Tornadoes are difficult to observe at night. Take cover now!

&&

LAT...LON 3878 8945 3894 8947 3903 8925 3899 8926
      3874 8925 3874 8914 3858 8914 3851 8935
      3852 8936 3851 8936 3849 8941 3850 8943
TIME...MOT...LOC 0201Z 237DEG 43KT 3887 8946 3872 8943 3850 8946

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Elmore

284 
WWUS53 KLSX 210216
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
916 PM CDT Sun Apr 20 2025

ILC005-027-210226-
/O.CAN.KLSX.TO.W.0053.000000T0000Z-250421T0230Z/
Bond IL-Clinton IL-
916 PM CDT Sun Apr 20 2025

...TORNADO WARNING IS CANCELLED FOR EASTERN BOND AND NORTHEASTERN 
CLINTON COUNTIES...

The storms which prompted the warning have weakened below severe 
limits, and no longer appear capable of producing a tornado. 
Therefore, the warning has been cancelled. However, gusty winds are 
still possible with these thunderstorms.

A Tornado Watch remains in effect until 1100 PM CDT for a portion of 
south central Illinois.

&&

LAT...LON 3894 8947 3903 8925 3899 8926 3874 8925
      3874 8914 3858 8914 3851 8935 3852 8936
      3851 8936 3849 8941 3850 8943 3878 8945
TIME...MOT...LOC 0208Z 237DEG 43KT 3893 8936 3877 8933 3855 8936

$$

Elmore

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 7:14 PM CDT	Severe Thunderstorm Warning	LSX	Adams	16 min
Apr 20, 7:43 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	47 min
Apr 20, 7:53 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	52 min
Apr 20, 7:56 PM CDT	Tornado Warning	LSX	Randolph	49 min
Apr 20, 8:03 PM CDT	Tornado Warning	LSX	Monroe, Saint Clair	42 min
Apr 20, 8:32 PM CDT	Tornado Warning	LSX	Randolph, Saint Clair, Washington	43 min
Apr 20, 9:12 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Marion, Washington	35 min

Nearby

Tornado Warnings in Illinois, 2025 Every tornado warning in 2025 Tornadoes in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.