Alert archive / Illinois / Tornado Warnings in 2026

Tornado Warning 49, NWS St. Louis, MO

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

NWS St. Louis, MO issued this tornado warning at Apr 27, 2026, 6:41 PM CDT for Saint Charles County, Saint Louis County, Missouri; Calhoun County, Jersey County, Madison County, Illinois. It was in force for 32 min. 18 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 27, 2026, 6:41 PM CDT (23:41 UTC)
Expired
Apr 27, 2026, 7:13 PM CDT
In force
32 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 23:41 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.

What was reported inside it

TimeReportWhereRemark
Apr 27, 6:49 PM CDTTORNADO2 Ne West Alton, MOA video from Alton showed the vortex of a waterspout tornado dissipating as it approached the Lincoln Shields Recreation Area. A NWS damage survey was unable to find any damage across northeastern St. Charles County, northern St. Louis County, or western Madis
Apr 27, 6:50 PM CDTHAIL 1.75Alton, IL
Apr 27, 6:52 PM CDTHAIL 12 S Godfrey, ILHail from the sizes of dimes to quarters.
Apr 27, 6:54 PM CDTHAIL 11 S Godfrey, IL
Apr 27, 6:55 PM CDTHAIL 1.52 Nw Alton, ILReport from mPING: Ping Pong Ball (1.50 in.).
Apr 27, 6:56 PM CDTHAIL 22 Wnw Bethalto, IL
Apr 27, 6:59 PM CDTHAIL 11 Ne Alton, ILReport from mPING: Quarter (1.00 in.).
Apr 27, 7:00 PM CDTHAIL 1.252 N Wood River, IL
Apr 27, 7:03 PM CDTHAIL 1.25Bethalto, IL
Apr 27, 7:07 PM CDTHAIL 1.751 Nw Bethalto, ILReport from mPING: Golf Ball (1.75 in.).
Apr 27, 7:10 PM CDTTSTM WND DMGFlorissant, MO4 buildings collapsed in Florissant.
Apr 27, 7:10 PM CDTHAIL 1Dorsey, IL
Apr 27, 7:10 PM CDTHAIL 1.25Bethalto, IL
Apr 27, 7:11 PM CDTHAIL 13 W Carpenter, ILReport from mPING: Quarter (1.00 in.).
Apr 27, 7:12 PM CDTTSTM WND DMG1 W Spanish Lake, MOMultiple large tree limbs down.
Apr 27, 7:13 PM CDTTSTM WND DMG1 Sw Spanish Lake, MODelayed report. Video on Facebook shows several large trees snapped and uprooted along Bayonne Dr.
Apr 27, 7:13 PM CDTHAIL 1.753 Ssw Prairietown, IL
Apr 27, 7:15 PM CDTHAIL 1.253 W Carpenter, ILReport from mPING: Half Dollar (1.25 in.).

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 27, 12:50 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.7 hours before the alert went out and 202 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2026-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2026-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

855 
WFUS53 KLSX 272341
TORLSX
ILC013-083-119-MOC183-189-280030-
/O.NEW.KLSX.TO.W.0049.260427T2341Z-260428T0030Z/

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

The National Weather Service in St Louis has issued a

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

* Until 730 PM CDT.

* At 641 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Hazelwood, moving east at 35 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...
  Florissant, Hazelwood, Berkeley, Portage Des Sioux, Calverton Park,
  Ferguson, Lambert-St. Louis International Airport, Orchard Farms,
  Bridgeton and St. Charles around 645 PM CDT.
  Black Jack around 650 PM CDT.
  West Alton, Godfrey and Spanish Lake around 655 PM CDT.

Other locations impacted by the tornado include Fosterburg and Poag.

This includes the following State Parks...
Confluence State Park and First Missouri State Capitol Historic Site.

This includes Interstate 70 in Missouri between exits 222 and 229.

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 3891 9050 3900 9002 3900 8991 3881 8987
      3874 9062 3888 9066
TIME...MOT...LOC 2341Z 258DEG 31KT 3884 9038

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

$$

Elmore
4 follow-up statements
561 
WWUS53 KLSX 272349
SVSLSX

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

ILC013-083-119-MOC183-189-280030-
/O.CON.KLSX.TO.W.0049.000000T0000Z-260428T0030Z/
Calhoun IL-Jersey IL-Madison IL-Saint Charles MO-Saint Louis MO-
649 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR SOUTHERN
CALHOUN, SOUTH CENTRAL JERSEY AND NORTHWESTERN MADISON COUNTIES IN
SOUTHWESTERN ILLINOIS AND NORTHEASTERN SAINT CHARLES AND NORTHEASTERN
SAINT LOUIS COUNTIES IN EAST CENTRAL MISSOURI...

At 649 PM CDT, a cluster of severe thunderstorms capable of producing
a tornado was located near Black Jack, moving east at 35 mph.

HAZARD...Tornado and golf ball 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...
  Florissant, Black Jack, Portage Des Sioux, Hazelwood, Ferguson,
  Calverton Park and Berkeley around 650 PM CDT.
  West Alton, Godfrey and Spanish Lake around 655 PM CDT.
  East Alton, Alton, Wood River, Hartford and Granite City around 705
  PM CDT.

Other locations impacted by the tornado include Fosterburg and Poag.

This includes the following State Parks...
Confluence State Park and First Missouri State Capitol Historic Site.

This includes Interstate 70 in Missouri between exits 222 and 229.

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 3891 9050 3900 9002 3900 8991 3881 8987
      3874 9062 3888 9066
TIME...MOT...LOC 2341Z 258DEG 31KT 3884 9038

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN

$$

Elmore
786 
WWUS53 KLSX 272356
SVSLSX

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

ILC013-083-MOC183-189-280006-
/O.CAN.KLSX.TO.W.0049.000000T0000Z-260428T0030Z/
Calhoun IL-Jersey IL-Saint Charles MO-Saint Louis MO-
656 PM CDT Mon Apr 27 2026

...TORNADO WARNING IS CANCELLED FOR SOUTHERN CALHOUN, SOUTH CENTRAL
JERSEY, NORTHEASTERN SAINT CHARLES AND NORTHEASTERN SAINT LOUIS
COUNTIES...

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

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

&&

LAT...LON 3891 9023 3897 9018 3900 9003 3900 8991
      3885 8988 3885 9011 3889 9019 3889 9020
      3891 9022
TIME...MOT...LOC 2349Z 258DEG 31KT 3885 9029

$$


ILC119-280030-
/O.CON.KLSX.TO.W.0049.000000T0000Z-260428T0030Z/
Madison IL-
656 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHWESTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS...

At 656 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Alton, moving east at 45 mph.

HAZARD...Tornado and golf ball 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...
  Bethalto, Alton, East Alton, Rosewood Heights, Wood River, Roxana
  and Godfrey around 700 PM CDT.
  Dorsey around 705 PM CDT.
  Prairietown around 710 PM CDT.

Other locations impacted by the tornado include Fosterburg.

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 3891 9023 3897 9018 3900 9003 3900 8991
      3885 8988 3885 9011 3889 9019 3889 9020
      3891 9022
TIME...MOT...LOC 2349Z 255DEG 37KT 3889 9022

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN

$$

Elmore
969 
WWUS53 KLSX 280002
SVSLSX

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

ILC119-280030-
/O.CON.KLSX.TO.W.0049.000000T0000Z-260428T0030Z/
Madison IL-
702 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR NORTH
CENTRAL MADISON COUNTY IN SOUTHWESTERN ILLINOIS...

At 702 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Bethalto, moving east at 45 mph.

HAZARD...Tornado and two inch 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...
  Bethalto, Dorsey, Rosewood Heights, East Alton, Wood River, Alton
  and Roxana around 705 PM CDT.
  Prairietown around 710 PM CDT.
  Carpenter around 715 PM CDT.

Other locations impacted by the tornado include Fosterburg.

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 3885 9011 3898 9012 3900 9004 3900 8991
      3885 8988
TIME...MOT...LOC 2356Z 255DEG 37KT 3891 9013

TORNADO...RADAR INDICATED
MAX HAIL SIZE...2.00 IN

$$

Elmore
314 
WWUS53 KLSX 280013
SVSLSX

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

ILC119-280023-
/O.CAN.KLSX.TO.W.0049.000000T0000Z-260428T0030Z/
Madison IL-
713 PM CDT Mon Apr 27 2026

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

The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However, small hail, gusty
winds, and heavy rain are still possible with this thunderstorm.

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

&&

LAT...LON 3885 9011 3898 9012 3900 9004 3900 8991
      3885 8988
TIME...MOT...LOC 0002Z 255DEG 37KT 3892 9005

$$

Elmore

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 8:43 PM CDTTornado WarningLSXBoone, Callaway, Cole, Moniteau30 min
Apr 26, 10:08 PM CDTTornado WarningLSXOsage13 min
Apr 27, 1:06 AM CDTSevere Thunderstorm WarningLSXCrawford39 min
Apr 27, 2:10 AM CDTAreal Flood AdvisoryLSXCrawford3 hr
Apr 27, 2:44 AM CDTSevere Thunderstorm WarningLSXWashington31 min
Apr 27, 3:08 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXSainte Genevieve, Saint Francois, Washington52 min
Apr 27, 3:36 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois39 min
Apr 27, 3:41 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren49 min
Apr 27, 4:02 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve24 min
Apr 27, 6:52 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXKnox, Shelby38 min
Apr 27, 7:35 AM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Monroe, Shelby55 min
Apr 27, 7:54 AM CDTTornado WarningLSXMonroe, Ralls51 min
Apr 27, 8:10 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXAudrain, Lincoln, Marion, Pike, Ralls65 min
Apr 27, 8:24 AM CDTTornado WarningLSXPike, Ralls51 min
Apr 27, 10:09 AM CDTRiver Flood WarningLSXOsage24 hr
Apr 27, 10:41 AM CDTFlash Flood WarningLSXBoone, Cole, Moniteau3 hr
Apr 27, 11:18 AM CDTFlood WatchLSXAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 10 more10 hr
Apr 27, 11:48 AM CDTFlash Flood WarningLSXAudrain, Boone, Callaway, Cole, Moniteau, Montgomery and 1 more3 hr
Apr 27, 12:09 PM CDTAreal Flood AdvisoryLSXLincoln, Pike, Warren3 hr
Apr 27, 12:27 PM CDTTornado WarningLSXSaint Charles, Saint Louis, City of Saint Louis48 min
Apr 27, 1:25 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis37 min
Apr 27, 1:51 PM CDTAreal Flood AdvisoryLSXMontgomery, Warren3 hr
Apr 27, 1:55 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis45 min
Apr 27, 2:01 PM CDTTornado WarningLSXCity of Saint Louis27 min
Apr 27, 2:05 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike, Warren40 min
Apr 27, 2:13 PM CDTAreal Flood AdvisoryLSXSaint Louis, City of Saint Louis3 hr
Apr 27, 2:39 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles, Warren51 min
Apr 27, 2:42 PM CDTRiver Flood WarningLSXMonroe20 hr
Apr 27, 2:49 PM CDTTornado WarningLSXSaint Charles, Warren41 min
Apr 27, 2:54 PM CDTRiver Flood WarningLSXJefferson, Saint Louis6 days
Apr 27, 2:57 PM CDTSevere Thunderstorm WarningLSXBoone, Moniteau48 min
Apr 27, 3:05 PM CDTRiver Flood WarningLSXPerry, Sainte Genevieve8 days
Apr 27, 3:14 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis46 min
Apr 27, 3:19 PM CDTTornado WarningLSXSaint Charles, Saint Louis41 min
Apr 27, 3:25 PM CDTSevere Thunderstorm WarningLSXAudrain, Callaway42 min
Apr 27, 3:37 PM CDTFlash Flood WarningLSXBoone5 hr
Apr 27, 3:39 PM CDTRiver Flood WarningLSXLewis11 hr
Apr 27, 3:41 PM CDTRiver Flood WarningLSXLincoln24 hr
Apr 27, 3:41 PM CDTTornado WarningLSXAudrain, Callaway49 min
Apr 27, 3:43 PM CDTSevere Thunderstorm WarningLSXBoone62 min
Apr 27, 3:46 PM CDTSevere Thunderstorm WarningLSXMarion, Pike, Ralls44 min
Apr 27, 3:46 PM CDTTornado WarningLSXBoone14 min
Apr 27, 3:53 PM CDTRiver Flood WarningLSXLincoln4 days
Apr 27, 3:59 PM CDTRiver Flood WarningLSXCrawford, Washington18 hr
Apr 27, 4:00 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway, Moniteau60 min
Apr 27, 4:07 PM CDTSevere Thunderstorm WarningLSXAudrain, Pike, Ralls53 min
Apr 27, 4:09 PM CDTTornado WarningLSXAudrain, Montgomery, Pike, Ralls51 min
Apr 27, 4:13 PM CDTFlash Flood WarningLSXAudrain5 hr
Apr 27, 4:29 PM CDTTornado WarningLSXBoone, Callaway, Cole, Moniteau46 min
Apr 27, 4:34 PM CDTTornado WarningLSXMarion29 min
Apr 27, 4:35 PM CDTFlash Flood WarningLSXMonroe5 hr
Apr 27, 4:46 PM CDTTornado WarningLSXPike44 min
Apr 27, 4:52 PM CDTFlash Flood WarningLSXMarion, Ralls4 hr
Apr 27, 4:54 PM CDTTornado WarningLSXAudrain, Pike21 min
Apr 27, 4:57 PM CDTRiver Flood WarningLSXCallaway, Osage4 days
Apr 27, 4:57 PM CDTRiver Flood WarningLSXGasconade, Montgomery3 days
Apr 27, 4:57 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike63 min
Apr 27, 5:00 PM CDTTornado WarningLSXPike30 min
Apr 27, 5:04 PM CDTRiver Flood WarningLSXMarion22 hr
Apr 27, 5:09 PM CDTSevere Thunderstorm WarningLSXCallaway19 min
Apr 27, 5:14 PM CDTSevere Thunderstorm WarningLSXCallaway, Cole, Osage61 min
Apr 27, 5:20 PM CDTFlash Flood WarningLSXPike, Ralls3 hr
Apr 27, 5:21 PM CDTSevere Thunderstorm WarningLSXPike39 min
Apr 27, 5:32 PM CDTSevere Thunderstorm WarningLSXLincoln43 min
Apr 27, 5:47 PM CDTSevere Thunderstorm WarningLSXLincoln58 min
Apr 27, 5:55 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren50 min
Apr 27, 5:57 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Washington48 min
Apr 27, 5:59 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles46 min
Apr 27, 6:09 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Warren36 min
Apr 27, 6:26 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXFranklin, Jefferson64 min
Apr 27, 6:28 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis47 min
Apr 27, 6:31 PM CDTTornado WarningLSXFranklin, Jefferson, Washington59 min
Apr 27, 6:40 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis48 min
Apr 27, 6:45 PM CDTSevere Thunderstorm WarningLSXCrawford45 min
Apr 27, 6:32 AM CDTSevere Thunderstorm WarningLSXClinton, Washington43 min
Apr 27, 7:03 AM CDTSevere Thunderstorm WarningLSXClinton, Marion, Washington57 min
Apr 27, 7:59 AM CDTSevere Thunderstorm WarningLSXGreene, Macoupin, Montgomery33 min
Apr 27, 8:57 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXGreene, Pike48 min
Apr 27, 9:03 AM CDTTornado WarningLSXGreene, Pike42 min
Apr 27, 9:44 AM CDTSevere Thunderstorm WarningLSXGreene, Macoupin61 min

Nearby

Tornado Warnings in Illinois, 2026Tornado Warnings in Missouri, 2026Every tornado warning in 2026Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.