Alert archive / Illinois / Tornado Warnings in 2026
Tornado Warning 34, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 27, 2026, 1:13 PM CDT for Madison County, Illinois. It was in force for 47 min. 2 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, 1:13 PM CDT (18:13 UTC)
- Expired
- Apr 27, 2026, 2:00 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Madison County, IL
The radar
The St Louis radar (KLSX), 66 km from the middle of the area, began a volume at 18:18 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 27, 1:41 PM CDT | TORNADO | 2 Ssw Marine, IL | NWS Damage Survey found that a brief EF0 tornado impacted a farm near IL Highway 4 and Interstate 70. |
| Apr 27, 1:52 PM CDT | TSTM WND DMG | 2 Sw Marine, IL | Shed damaged. |
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.
| 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, 6.2 hours before the alert went out and 192 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.
- 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
The text
As transmitted.
922
WFUS53 KLSX 271813
TORLSX
ILC119-271900-
/O.NEW.KLSX.TO.W.0034.260427T1813Z-260427T1900Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
113 PM CDT Mon Apr 27 2026
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Southeastern Madison County in southwestern Illinois...
* Until 200 PM CDT.
* At 113 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Pontoon Beach, moving east at 20 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.
* This tornado will be near...
Pontoon Beach, South Roxana, Roxana and Hartford around 115 PM CDT.
Edwardsville and Collinsville around 120 PM CDT.
Glen Carbon and Maryville around 125 PM CDT.
Other locations impacted by the tornado include Poag, Kuhn, Fruit and
Kaufman.
This includes the following highways...
Interstate 55 in Illinois near exit 23. Interstate 70 in Illinois
between exits 21 and 24.
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 3870 9005 3881 9008 3890 8976 3872 8971
TIME...MOT...LOC 1813Z 258DEG 19KT 3876 9005
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
$$
Elmore5 follow-up statements
006
WWUS53 KLSX 271825
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
125 PM CDT Mon Apr 27 2026
ILC119-271900-
/O.CON.KLSX.TO.W.0034.000000T0000Z-260427T1900Z/
Madison IL-
125 PM CDT Mon Apr 27 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 2 PM CDT FOR CENTRAL
MADISON COUNTY IN SOUTHWESTERN ILLINOIS...
At 125 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Glen Carbon, moving east at 30 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Glen Carbon, Edwardsville, Troy, Maryville, Roxana and Collinsville
around 130 PM CDT.
Marine and St. Jacob around 145 PM CDT.
Other locations impacted by the tornado include Kuhn, Fruit and
Kaufman.
This includes the following highways...
Interstate 55 in Illinois near exit 23. Interstate 70 in Illinois
between exits 21 and 24.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 3870 8999 3882 9003 3890 8976 3872 8971
TIME...MOT...LOC 1813Z 257DEG 24KT 3876 9004
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
$$
Elmore639
WWUS53 KLSX 271833
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
133 PM CDT Mon Apr 27 2026
ILC119-271900-
/O.CON.KLSX.TO.W.0034.000000T0000Z-260427T1900Z/
Madison IL-
133 PM CDT Mon Apr 27 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 2 PM CDT FOR CENTRAL
MADISON COUNTY IN SOUTHWESTERN ILLINOIS...
At 133 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Troy, or near Glen Carbon, moving east at 25 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.
This tornado will be near...
Glen Carbon, Edwardsville, Troy and Maryville around 135 PM CDT.
St. Jacob around 145 PM CDT.
Marine around 150 PM CDT.
Other locations impacted by the tornado include Kuhn, Fruit and
Kaufman.
This includes the following highways...
Interstate 55 in Illinois near exit 23. Interstate 70 in Illinois
between exits 21 and 24.
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 3872 8993 3884 8997 3890 8976 3872 8971
TIME...MOT...LOC 1825Z 255DEG 22KT 3878 8997
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
$$
Elmore621
WWUS53 KLSX 271841
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
141 PM CDT Mon Apr 27 2026
ILC119-271900-
/O.CON.KLSX.TO.W.0034.000000T0000Z-260427T1900Z/
Madison IL-
141 PM CDT Mon Apr 27 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 2 PM CDT FOR SOUTHEASTERN
MADISON COUNTY IN SOUTHWESTERN ILLINOIS...
At 141 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Marine, or near Troy, moving east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows and vehicles will occur. Tree damage is
likely.
This tornado will be near...
St. Jacob, Glen Carbon and Troy around 145 PM CDT.
Marine around 150 PM CDT.
Other locations impacted by the tornado include Kuhn, Fruit and
Kaufman.
This includes the following highways...
Interstate 55 in Illinois near exit 23. Interstate 70 in Illinois
between exits 21 and 24.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.
&&
LAT...LON 3872 8989 3885 8992 3890 8976 3872 8971
TIME...MOT...LOC 1833Z 261DEG 22KT 3877 8989
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
$$
Elmore827
WWUS53 KLSX 271850
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
150 PM CDT Mon Apr 27 2026
ILC119-271900-
/O.CON.KLSX.TO.W.0034.000000T0000Z-260427T1900Z/
Madison IL-
150 PM CDT Mon Apr 27 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 2 PM CDT FOR SOUTHEASTERN
MADISON COUNTY IN SOUTHWESTERN ILLINOIS...
At 150 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Marine, or near Highland, moving east at 25 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.
This tornado will be near...
Marine around 155 PM CDT.
Other locations impacted by the tornado include Kaufman.
This includes Interstate 70 in Illinois between exits 21 and 24.
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 3873 8982 3887 8987 3890 8976 3874 8972
TIME...MOT...LOC 1841Z 261DEG 22KT 3878 8983
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
$$
Elmore680 WWUS53 KLSX 271857 SVSLSX Severe Weather Statement National Weather Service St Louis MO 157 PM CDT Mon Apr 27 2026 ILC119-271907- /O.EXP.KLSX.TO.W.0034.000000T0000Z-260427T1900Z/ Madison IL- 157 PM CDT Mon Apr 27 2026 ...TORNADO WARNING WILL EXPIRE AT 2 PM CDT FOR SOUTHEASTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS... The Tornado Warning that was previously in effect has been reissued for Madison County and is in effect until 245 PM CDT. Please refer to that bulletin for the latest severe weather information. However, small hail, gusty winds, and heavy rain are still possible with this thunderstorm. To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office. A Tornado Watch remains in effect until 900 PM CDT Monday for a portion of southwest Illinois. && LAT...LON 3873 8982 3887 8987 3890 8976 3874 8972 TIME...MOT...LOC 1850Z 261DEG 22KT 3878 8976 $$ 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 | 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 | 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, 1:49 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, 3:19 PM CDT | Tornado Warning | LSX | Calhoun, Jersey, Madison | 41 min |
| 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 |
Nearby
Tornado Warnings in Illinois, 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.