Alert archive / Illinois / Tornado Warnings in 2026

Tornado Warning 38, NWS St. Louis, MO

April 27, 2026Calhoun County, Jersey County, Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 27, 2026, 3:19 PM CDT for Calhoun County, Jersey County, Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri. It was in force for 41 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 27, 2026, 3:19 PM CDT (20:19 UTC)
Expired: Apr 27, 2026, 4:00 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Calhoun County, IL, Jersey County, IL, Madison County, IL, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 40 km from the middle of the area, began a volume at 20:18 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 27, 12:50 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.3 hours before the alert went out and 201 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1053 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 306 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

016 
WFUS53 KLSX 272019
TORLSX
ILC013-083-119-MOC183-189-272100-
/O.NEW.KLSX.TO.W.0038.260427T2019Z-260427T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
319 PM CDT Mon Apr 27 2026

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Calhoun County in southwestern Illinois...
  Southeastern Jersey County in southwestern Illinois...
  Northwestern Madison County in southwestern Illinois...
  Northeastern Saint Charles County in east central Missouri...
  North Central Saint Louis County in east central Missouri...

* Until 400 PM CDT.

* At 319 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near St. Peters, moving east at 45 mph.

  HAZARD...Tornado and quarter size hail.

  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.

* This tornado will be near...
  St. Peters, O'Fallon and Cottleville around 320 PM CDT.
  St. Charles around 325 PM CDT.
  Orchard Farms, Hazelwood and Bridgeton around 330 PM CDT.

Other locations impacted by the tornado include Kampville, Golden
Eagle, Deer Plain and Delhi.

This includes Interstate 70 in Missouri between exits 220 and 227.

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.

&&

LAT...LON 3876 9065 3889 9070 3910 9017 3905 9015
      3900 9014 3900 9013 3885 9006
TIME...MOT...LOC 2019Z 251DEG 39KT 3883 9061

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore

4 follow-up statements

829 
WWUS53 KLSX 272029
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
329 PM CDT Mon Apr 27 2026

ILC013-083-119-MOC183-189-272100-
/O.CON.KLSX.TO.W.0038.000000T0000Z-260427T2100Z/
Calhoun IL-Jersey IL-Madison IL-Saint Charles MO-Saint Louis MO-
329 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 4 PM CDT FOR SOUTHEASTERN
CALHOUN, SOUTHEASTERN JERSEY AND NORTHWESTERN MADISON COUNTIES IN
SOUTHWESTERN ILLINOIS AND NORTHEASTERN SAINT CHARLES AND NORTH
CENTRAL SAINT LOUIS COUNTIES IN EAST CENTRAL MISSOURI...

At 329 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Orchard Farms, or 6 miles northeast of St. Charles,
moving east at 45 mph.

HAZARD...Tornado and quarter size hail.

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.

This tornado will be near...
  Orchard Farms, St. Charles, Hazelwood, Bridgeton and St. Peters
  around 330 PM CDT.
  Florissant and Grafton around 335 PM CDT.
  Portage Des Sioux and Elsah around 340 PM CDT.

Other locations impacted by the tornado include Kampville, Deer
Plain, Golden Eagle and Delhi.

This includes Interstate 70 in Missouri between exits 225 and 227.

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.

&&

LAT...LON 3888 9061 3892 9062 3910 9017 3905 9015
      3903 9015 3900 9014 3900 9013 3885 9006
      3877 9058
TIME...MOT...LOC 2019Z 251DEG 39KT 3883 9060

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore

721 
WWUS53 KLSX 272035
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
335 PM CDT Mon Apr 27 2026

ILC013-272045-
/O.CAN.KLSX.TO.W.0038.000000T0000Z-260427T2100Z/
Calhoun IL-
335 PM CDT Mon Apr 27 2026

...TORNADO WARNING IS CANCELLED FOR SOUTHEASTERN CALHOUN COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. However, small hail and
gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 900 PM CDT for a portion of
southwest Illinois.

&&

LAT...LON 3879 9047 3879 9049 3890 9052 3890 9051
      3892 9049 3896 9047 3910 9017 3905 9015
      3902 9015 3900 9014 3900 9013 3885 9006
TIME...MOT...LOC 2029Z 251DEG 39KT 3887 9047

$$


ILC083-119-MOC183-189-272100-
/O.CON.KLSX.TO.W.0038.000000T0000Z-260427T2100Z/
Jersey IL-Madison IL-Saint Charles MO-Saint Louis MO-
335 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 4 PM CDT FOR SOUTHEASTERN
JERSEY AND NORTHWESTERN MADISON COUNTIES IN SOUTHWESTERN ILLINOIS AND
NORTHEASTERN SAINT CHARLES AND NORTH CENTRAL SAINT LOUIS COUNTIES IN
EAST CENTRAL MISSOURI...

At 335 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Orchard Farms, or 6 miles north of Hazelwood, moving
east at 45 mph.

HAZARD...Tornado and quarter size hail.

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.

This tornado will be near...
  Orchard Farms, Florissant, Grafton, Hazelwood, Bridgeton and St.
  Charles around 340 PM CDT.
  West Alton, Portage Des Sioux and Elsah around 345 PM CDT.
  Godfrey around 350 PM CDT.

Other locations impacted by the tornado include Delhi.

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.

&&

LAT...LON 3879 9047 3879 9049 3890 9052 3890 9051
      3892 9049 3896 9047 3910 9017 3905 9015
      3902 9015 3900 9014 3900 9013 3885 9006
TIME...MOT...LOC 2029Z 250DEG 37KT 3886 9049

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore

072 
WWUS53 KLSX 272047
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
347 PM CDT Mon Apr 27 2026

ILC083-119-MOC183-189-272100-
/O.CON.KLSX.TO.W.0038.000000T0000Z-260427T2100Z/
Jersey IL-Madison IL-Saint Charles MO-Saint Louis MO-
347 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 4 PM CDT FOR SOUTHEASTERN
JERSEY AND NORTHWESTERN MADISON COUNTIES IN SOUTHWESTERN ILLINOIS AND
NORTHEASTERN SAINT CHARLES AND NORTH CENTRAL SAINT LOUIS COUNTIES IN
EAST CENTRAL MISSOURI...

At 347 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Portage Des Sioux, or near Godfrey, moving east at
40 mph.

HAZARD...Tornado and quarter size hail.

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.

This tornado will be near...
  Godfrey, West Alton, Portage Des Sioux, Elsah and Grafton around
  350 PM CDT.
  Alton, East Alton, Brighton, Rosewood Heights and Wood River around
  355 PM CDT.

Other locations impacted by the tornado include Delhi.

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.

&&

LAT...LON 3896 9040 3898 9041 3910 9017 3905 9015
      3901 9015 3900 9014 3900 9013 3885 9006
      3884 9037
TIME...MOT...LOC 2035Z 250DEG 35KT 3888 9043

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore

441 
WWUS53 KLSX 272057
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
357 PM CDT Mon Apr 27 2026

ILC083-119-MOC183-189-272107-
/O.EXP.KLSX.TO.W.0038.000000T0000Z-260427T2100Z/
Jersey IL-Madison IL-Saint Charles MO-Saint Louis MO-
357 PM CDT Mon Apr 27 2026

...TORNADO WARNING WILL EXPIRE AT 4 PM CDT FOR SOUTHEASTERN JERSEY
AND NORTHWESTERN MADISON COUNTIES IN SOUTHWESTERN ILLINOIS AND
NORTHEASTERN SAINT CHARLES AND NORTH CENTRAL SAINT LOUIS COUNTIES IN
EAST CENTRAL MISSOURI...

The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However, small hail and gusty winds are still
possible with this thunderstorm.

A Severe Thunderstorm Warning still remains in effect for Madison and
Jersey counties.

A Tornado Watch remains in effect until 900 PM CDT for portions of
southwest Illinois and east central Missouri.

&&

LAT...LON 3896 9040 3898 9041 3910 9017 3905 9015
      3901 9015 3900 9014 3900 9013 3885 9006
      3884 9037
TIME...MOT...LOC 2047Z 250DEG 35KT 3892 9028

$$

Elmore

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 6:32 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Washington	43 min
Apr 27, 7:03 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Marion, Washington	57 min
Apr 27, 7:59 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin, Montgomery	33 min
Apr 27, 8:10 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Adams, Calhoun, Pike	65 min
Apr 27, 8:24 AM CDT	Tornado Warning	LSX	Calhoun, Pike	51 min
Apr 27, 8:57 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Greene, Pike	48 min
Apr 27, 9:03 AM CDT	Tornado Warning	LSX	Greene, Pike	42 min
Apr 27, 9:44 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	61 min
Apr 27, 10:29 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	61 min
Apr 27, 10:52 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	42 min
Apr 27, 11:18 AM CDT	Flood Watch	LSX	Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 7 more	10 hr
Apr 27, 12:09 PM CDT	Areal Flood Advisory	LSX	Calhoun	3 hr
Apr 27, 12:27 PM CDT	Tornado Warning	LSX	Madison, Saint Clair	48 min
Apr 27, 1:07 PM CDT	Flash Flood Warning	LSX	Fayette, Montgomery	7 hr
Apr 27, 1:13 PM CDT	Tornado Warning	LSX	Madison	47 min
Apr 27, 1:49 PM CDT	Tornado Warning	LSX	Bond, Madison	14 min
Apr 27, 1:55 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	45 min
Apr 27, 2:01 PM CDT	Tornado Warning	LSX	Madison, Saint Clair	27 min
Apr 27, 2:30 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison	27 min
Apr 27, 3:05 PM CDT	River Flood Warning	LSX	Jackson, Randolph	8 days
Apr 27, 3:13 PM CDT	River Flood Warning	LSX	Pike, Scott	9 days
Apr 27, 3:14 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Madison	46 min
Apr 27, 3:16 PM CDT	River Flood Warning	LSX	Fayette	4 days
Apr 27, 3:46 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	44 min
Apr 27, 3:52 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	38 min
Apr 27, 4:20 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	55 min
Apr 27, 4:34 PM CDT	Tornado Warning	LSX	Adams, Brown	29 min
Apr 27, 4:46 PM CDT	Tornado Warning	LSX	Calhoun, Pike	44 min
Apr 27, 4:52 PM CDT	Flash Flood Warning	LSX	Adams, Pike	4 hr
Apr 27, 5:20 PM CDT	Flash Flood Warning	LSX	Brown, Pike	3 hr
Apr 27, 5:21 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	39 min
Apr 27, 5:27 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene	33 min
Apr 27, 5:32 PM CDT	Flash Flood Warning	LSX	Jersey	5 hr
Apr 27, 5:32 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin	43 min
Apr 27, 5:47 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	58 min
Apr 27, 5:50 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin	40 min
Apr 27, 5:59 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	46 min
Apr 27, 6:01 PM CDT	Tornado Warning	LSX	Jersey, Macoupin	44 min
Apr 27, 6:09 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	21 min
Apr 27, 6:28 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Calhoun, Fayette, Jersey, Macoupin, Madison and 1 more	47 min
Apr 27, 6:41 PM CDT	Tornado Warning	LSX	Calhoun, Jersey, Madison	32 min
Apr 27, 6:47 PM CDT	Flash Flood Warning	LSX	Macoupin	5 hr
Apr 26, 8:43 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole, Moniteau	30 min
Apr 26, 10:08 PM CDT	Tornado Warning	LSX	Osage	13 min
Apr 27, 1:06 AM CDT	Severe Thunderstorm Warning	LSX	Crawford	39 min
Apr 27, 2:10 AM CDT	Areal Flood Advisory	LSX	Crawford	3 hr
Apr 27, 2:44 AM CDT	Severe Thunderstorm Warning	LSX	Washington	31 min
Apr 27, 3:08 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Sainte Genevieve, Saint Francois, Washington	52 min
Apr 27, 3:36 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	39 min
Apr 27, 3:41 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	49 min
Apr 27, 4:02 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	24 min
Apr 27, 6:52 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Knox, Shelby	38 min
Apr 27, 7:35 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Monroe, Shelby	55 min
Apr 27, 7:54 AM CDT	Tornado Warning	LSX	Monroe, Ralls	51 min
Apr 27, 10:09 AM CDT	River Flood Warning	LSX	Osage	24 hr
Apr 27, 10:41 AM CDT	Flash Flood Warning	LSX	Boone, Cole, Moniteau	3 hr
Apr 27, 11:48 AM CDT	Flash Flood Warning	LSX	Audrain, Boone, Callaway, Cole, Moniteau, Montgomery and 1 more	3 hr
Apr 27, 1:25 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis	37 min
Apr 27, 1:51 PM CDT	Areal Flood Advisory	LSX	Montgomery, Warren	3 hr
Apr 27, 2:05 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike, Warren	40 min
Apr 27, 2:13 PM CDT	Areal Flood Advisory	LSX	Saint Louis, City of Saint Louis	3 hr
Apr 27, 2:39 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	51 min
Apr 27, 2:42 PM CDT	River Flood Warning	LSX	Monroe	20 hr
Apr 27, 2:49 PM CDT	Tornado Warning	LSX	Saint Charles, Warren	41 min
Apr 27, 2:54 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	6 days
Apr 27, 2:57 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Moniteau	48 min
Apr 27, 3:25 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway	42 min
Apr 27, 3:37 PM CDT	Flash Flood Warning	LSX	Boone	5 hr
Apr 27, 3:39 PM CDT	River Flood Warning	LSX	Lewis	11 hr
Apr 27, 3:41 PM CDT	River Flood Warning	LSX	Lincoln	24 hr
Apr 27, 3:41 PM CDT	Tornado Warning	LSX	Audrain, Callaway	49 min
Apr 27, 3:43 PM CDT	Severe Thunderstorm Warning	LSX	Boone	62 min
Apr 27, 3:46 PM CDT	Tornado Warning	LSX	Boone	14 min
Apr 27, 3:53 PM CDT	River Flood Warning	LSX	Lincoln	4 days
Apr 27, 3:59 PM CDT	River Flood Warning	LSX	Crawford, Washington	18 hr
Apr 27, 4:00 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Moniteau	60 min
Apr 27, 4:07 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Pike, Ralls	53 min
Apr 27, 4:09 PM CDT	Tornado Warning	LSX	Audrain, Montgomery, Pike, Ralls	51 min
Apr 27, 4:13 PM CDT	Flash Flood Warning	LSX	Audrain	5 hr
Apr 27, 4:29 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole, Moniteau	46 min

Nearby

Tornado Warnings in Illinois, 2026 Tornado Warnings in Missouri, 2026 Every tornado warning in 2026 Tornadoes in 2026

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.