Alert archive / Illinois / Tornado Warnings in 2026

Tornado Warning 35, NWS St. Louis, MO

April 27, 2026Bond County, Madison County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 27, 2026, 1:49 PM CDT for Bond County, Madison County, Illinois. It was in force for 14 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, 1:49 PM CDT (18:49 UTC)
Expired
Apr 27, 2026, 2:03 PM CDT
In force
14 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Bond County, IL, Madison County, IL

The radar

The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 18:48 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.

IssuedProductOfficeLasted
Apr 27, 8:31 AM CDTSevere Thunderstorm WatchSPC5 hr
Apr 27, 12:50 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.8 hours before the alert went out and 169 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.

254 
WFUS53 KLSX 271849
TORLSX
ILC005-119-271945-
/O.NEW.KLSX.TO.W.0035.260427T1849Z-260427T1945Z/

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

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Bond County in south central Illinois...
  East Central Madison County in southwestern Illinois...

* Until 245 PM CDT.

* At 149 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.

* Locations impacted include...
  Alhambra, Highland, Grantfork, Pierron, Old Ripley, Pocahontas,
  Dudleyville, Greenville, Beaver Creek and Smithboro.

This includes Interstate 70 in Illinois between exits 30 and 45.

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 3874 8972 3890 8976 3900 8936 3874 8930
TIME...MOT...LOC 1849Z 261DEG 22KT 3880 8974

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

$$

Elmore
2 follow-up statements
872 
WWUS53 KLSX 271859
SVSLSX

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

ILC005-119-271945-
/O.CON.KLSX.TO.W.0035.000000T0000Z-260427T1945Z/
Bond IL-Madison IL-
159 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR BOND COUNTY
IN SOUTH CENTRAL ILLINOIS AND EAST CENTRAL MADISON COUNTY IN
SOUTHWESTERN ILLINOIS...

At 159 PM CDT, a severe thunderstorm capable of producing a tornado
was located 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.

Locations impacted include...
  Highland, Grantfork, Pierron, Old Ripley, Pocahontas, Dudleyville,
  Greenville, Beaver Creek and Smithboro.

This includes Interstate 70 in Illinois between exits 30 and 45.

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 3874 8970 3891 8972 3900 8936 3874 8930
TIME...MOT...LOC 1849Z 261DEG 22KT 3880 8974

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

$$

Elmore
811 
WWUS53 KLSX 271903
SVSLSX

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

ILC005-119-271913-
/O.CAN.KLSX.TO.W.0035.000000T0000Z-260427T1945Z/
Bond IL-Madison IL-
203 PM CDT Mon Apr 27 2026

...TORNADO WARNING IS CANCELLED FOR BOND COUNTY IN SOUTH CENTRAL
ILLINOIS AND EAST 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. A Tornado Warning still
remains in effect for southwestern Madison County.

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

&&

LAT...LON 3874 8970 3891 8972 3900 8936 3874 8930
TIME...MOT...LOC 1859Z 261DEG 22KT 3881 8966

$$

Elmore

The office that day

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

IssuedProductOfficeCountiesLasted
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, 8:10 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXAdams, Calhoun, Pike65 min
Apr 27, 8:24 AM CDTTornado WarningLSXCalhoun, Pike51 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
Apr 27, 10:29 AM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery61 min
Apr 27, 10:52 AM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery42 min
Apr 27, 11:18 AM CDTFlood WatchLSXBond, Calhoun, Clinton, Fayette, Greene, Jersey and 7 more10 hr
Apr 27, 12:09 PM CDTAreal Flood AdvisoryLSXCalhoun3 hr
Apr 27, 12:27 PM CDTTornado WarningLSXMadison, Saint Clair48 min
Apr 27, 1:07 PM CDTFlash Flood WarningLSXFayette, Montgomery7 hr
Apr 27, 1:13 PM CDTTornado WarningLSXMadison47 min
Apr 27, 1:55 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair45 min
Apr 27, 2:01 PM CDTTornado WarningLSXMadison, Saint Clair27 min
Apr 27, 2:30 PM CDTSevere Thunderstorm WarningLSXBond, Clinton, Madison27 min
Apr 27, 3:05 PM CDTRiver Flood WarningLSXJackson, Randolph8 days
Apr 27, 3:13 PM CDTRiver Flood WarningLSXPike, Scott9 days
Apr 27, 3:14 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Jersey, Madison46 min
Apr 27, 3:16 PM CDTRiver Flood WarningLSXFayette4 days
Apr 27, 3:19 PM CDTTornado WarningLSXCalhoun, Jersey, Madison41 min
Apr 27, 3:46 PM CDTSevere Thunderstorm WarningLSXAdams, Pike44 min
Apr 27, 3:52 PM CDTSevere Thunderstorm WarningLSXJersey, Macoupin, Madison38 min
Apr 27, 4:20 PM CDTSevere Thunderstorm WarningLSXAdams, Brown, Pike55 min
Apr 27, 4:34 PM CDTTornado WarningLSXAdams, Brown29 min
Apr 27, 4:46 PM CDTTornado WarningLSXCalhoun, Pike44 min
Apr 27, 4:52 PM CDTFlash Flood WarningLSXAdams, Pike4 hr
Apr 27, 5:20 PM CDTFlash Flood WarningLSXBrown, Pike3 hr
Apr 27, 5:21 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Pike39 min
Apr 27, 5:27 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene33 min
Apr 27, 5:32 PM CDTFlash Flood WarningLSXJersey5 hr
Apr 27, 5:32 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Jersey, Macoupin43 min
Apr 27, 5:47 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene, Jersey58 min
Apr 27, 5:50 PM CDTSevere Thunderstorm WarningLSXGreene, Jersey, Macoupin40 min
Apr 27, 5:59 PM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey46 min
Apr 27, 6:01 PM CDTTornado WarningLSXJersey, Macoupin44 min
Apr 27, 6:09 PM CDTSevere Thunderstorm WarningLSXGreene, Macoupin21 min
Apr 27, 6:28 PM CDTSevere Thunderstorm WarningLSXBond, Calhoun, Fayette, Jersey, Macoupin, Madison and 1 more47 min
Apr 27, 6:41 PM CDTTornado WarningLSXCalhoun, Jersey, Madison32 min
Apr 27, 6:47 PM CDTFlash Flood WarningLSXMacoupin5 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.