Alert archive / Illinois / Tornado Warnings in 2026

Tornado Warning 74, NWS St. Louis, MO

June 21, 2026Marion County, Illinois

NWS St. Louis, MO issued this tornado warning at Jun 21, 2026, 6:08 PM CDT for Marion County, Illinois. It was in force for 10 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: Jun 21, 2026, 6:08 PM CDT (23:08 UTC)
Expired: Jun 21, 2026, 6:18 PM CDT
In force: 10 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Marion County, IL

The radar

The Evansville,IN radar (KVWX), 102 km from the middle of the area, began a volume at 23:09 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
Jun 21, 1:28 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.1 hours before the alert went out and 183 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: 1482 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

611 
WFUS53 KLSX 212308
TORLSX
ILC121-220000-
/O.NEW.KLSX.TO.W.0074.260621T2308Z-260622T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
608 PM CDT Sun Jun 21 2026

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Marion County in south central Illinois...

* Until 700 PM CDT.

* At 608 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles southeast of Salem, moving east at 35 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...
  Cartter, Kell and Helm.

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 3848 8894 3855 8894 3858 8870 3848 8870
TIME...MOT...LOC 2308Z 277DEG 32KT 3854 8889

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

$$

BSH

1 follow-up statement

949 
WWUS53 KLSX 212318
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
618 PM CDT Sun Jun 21 2026

ILC121-212328-
/O.CAN.KLSX.TO.W.0074.000000T0000Z-260622T0000Z/
Marion IL-
618 PM CDT Sun Jun 21 2026

...TORNADO WARNING IS CANCELLED FOR SOUTHEASTERN MARION COUNTY IN
SOUTH CENTRAL ILLINOIS...

The Tornado Warning that was previously in effect has been reissued
for Marion County and is in effect until 715 PM CDT. Please refer to
that bulletin for the latest severe weather information.

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

&&

LAT...LON 3848 8894 3855 8894 3858 8870 3848 8870
TIME...MOT...LOC 2308Z 277DEG 32KT 3853 8889

$$

BSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 2:47 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	43 min
Jun 21, 2:54 PM CDT	Tornado Warning	LSX	Bond, Madison	36 min
Jun 21, 3:03 PM CDT	Tornado Warning	LSX	Fayette	15 min
Jun 21, 3:23 PM CDT	Tornado Warning	LSX	Bond, Fayette	52 min
Jun 21, 3:26 PM CDT	Flash Flood Warning	LSX	Bond, Fayette, Montgomery	4 hr
Jun 21, 3:44 PM CDT	Flash Flood Warning	LSX	Fayette	6 hr
Jun 21, 3:45 PM CDT	Tornado Warning	LSX	Fayette, Marion	60 min
Jun 21, 4:27 PM CDT	Flash Flood Warning	LSX	Marion	6 hr
Jun 21, 5:02 PM CDT	Tornado Warning	LSX	Clinton, Madison, Saint Clair	43 min
Jun 21, 5:07 PM CDT	Tornado Warning	LSX	Bond, Fayette, Marion	38 min
Jun 21, 5:19 PM CDT	Tornado Warning	LSX	Fayette, Marion	41 min
Jun 21, 5:35 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Marion	70 min
Jun 21, 5:40 PM CDT	Tornado Warning	LSX	Marion	39 min
Jun 21, 5:43 PM CDT	Severe Thunderstorm Warning	LSX	Clinton	39 min
Jun 21, 5:50 PM CDT	Tornado Warning	LSX	Clinton	32 min
Jun 21, 6:15 PM CDT	Tornado Warning	LSX	Marion	37 min

Nearby

Tornado Warnings in Illinois, 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.