Alert archive / Illinois / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 193, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 21, 2026, 5:35 PM CDT for Clinton County, Marion County, Illinois. It was in force for 70 min. 3 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
- Jun 21, 2026, 5:35 PM CDT (22:35 UTC)
- Expired
- Jun 21, 2026, 6:45 PM CDT
- In force
- 70 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clinton County, IL, Marion County, IL
The radar
The Evansville,IN radar (KVWX), 122 km from the middle of the area, began a volume at 22:36 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 |
|---|---|---|---|
| Jun 21, 6:21 PM CDT | TSTM WND DMG | 2 N Sandoval, IL | An officer was blown off the road on Highway 51 north of Sandoval. |
| Jun 21, 6:21 PM CDT | TORNADO | 2 W Odin, IL | Report of tornado briefly on the ground. |
| Jun 21, 6:26 PM CDT | TSTM WND DMG | 2 Ese Sandoval, IL | Drone video showed scattered damage to tree limbs from RFD winds in the area. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 46 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
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, 10.6 hours before the alert went out and 184 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
- 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
The text
As transmitted.
182
WUUS53 KLSX 212235
SVRLSX
ILC027-121-212345-
/O.NEW.KLSX.SV.W.0193.260621T2235Z-260621T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
535 PM CDT Sun Jun 21 2026
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
East Central Clinton County in south central Illinois...
Southern Marion County in south central Illinois...
* Until 645 PM CDT.
* At 535 PM CDT, a severe thunderstorm was located near Shattuc, or
near Centralia, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
* Locations impacted include...
Ferrin, Shattuc, Wamac, Central City, Centralia, Junction City,
Sandoval, Odin, Walnut Hill, Selmaville, Tonti, Salem, Cartter,
Kell, Iuka and Helm.
This includes Interstate 57 in Illinois between exits 109 and 116.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
A Tornado Watch remains in effect until 900 PM CDT Sunday for a
portion of south central Illinois.
&&
LAT...LON 3851 8924 3862 8925 3867 8914 3868 8870
3848 8870 3848 8897 3847 8911 3848 8914
3850 8914 3851 8920
TIME...MOT...LOC 2235Z 267DEG 25KT 3856 8920
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BSH2 follow-up statements
013
WWUS53 KLSX 212257
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
557 PM CDT Sun Jun 21 2026
ILC027-212307-
/O.CAN.KLSX.SV.W.0193.000000T0000Z-260621T2345Z/
Clinton IL-
557 PM CDT Sun Jun 21 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EAST CENTRAL CLINTON
COUNTY...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. A Severe Thunderstorm
Warning still remains in effect for much of Clinton County.
&&
LAT...LON 3867 8914 3868 8870 3848 8870 3848 8897
3847 8905 3847 8912 3848 8914
TIME...MOT...LOC 2235Z 267DEG 25KT 3856 8919
$$
ILC121-212345-
/O.CON.KLSX.SV.W.0193.000000T0000Z-260621T2345Z/
Marion IL-
557 PM CDT Sun Jun 21 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS...
At 557 PM CDT, a severe thunderstorm was located near Odin, or 5
miles southwest of Salem, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Wamac, Central City, Centralia, Junction City, Sandoval, Odin,
Walnut Hill, Selmaville, Tonti, Salem, Cartter, Kell, Iuka and
Helm.
This includes Interstate 57 in Illinois between exits 109 and 116.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
&&
LAT...LON 3867 8914 3868 8870 3848 8870 3848 8897
3847 8905 3847 8912 3848 8914
TIME...MOT...LOC 2235Z 267DEG 25KT 3856 8919
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BSH979
WWUS53 KLSX 212310
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
610 PM CDT Sun Jun 21 2026
ILC121-212345-
/O.CON.KLSX.SV.W.0193.000000T0000Z-260621T2345Z/
Marion IL-
610 PM CDT Sun Jun 21 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHEASTERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS...
At 610 PM CDT, a severe thunderstorm was located 6 miles southeast of
Salem, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Cartter, Kell, Iuka and Helm.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
A Tornado Watch remains in effect until 900 PM CDT for a portion of
south central Illinois.
&&
LAT...LON 3855 8894 3868 8870 3848 8870 3848 8893
TIME...MOT...LOC 2257Z 268DEG 25KT 3856 8900
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BSHWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 3:24 PM CDT, 2 hours 11 minutes earlier. Its key messages:
- Damaging winds and tornadoes are possible through this evening across east central and southeast Missouri into southwest Illinois.
- Locally heavy rainfall is also possible through early tonight.
- Seasonably cool conditions are forecast this work week.
Area forecast discussion, Jun 21, 3:24 PM CDT, 2 hours 11 minutes before
Area Forecast Discussion
National Weather Service Saint Louis MO
324 PM CDT Sun Jun 21 2026
.KEY MESSAGES...
- Damaging winds and tornadoes are possible through this evening
across east central and southeast Missouri into southwest Illinois.
- Locally heavy rainfall is also possible through early tonight.
- Seasonably cool conditions are forecast this work week.
&&
.SHORT TERM... (Through Late Tonight)
Issued at 324 PM CDT Sun Jun 21 2026
A remnant MCV is currently in southwest Illinois and moving
east/northeast. There has been a very slow and gradual uptick in
convection out ahead of this feature across southwest and south-
central Illinois as diurnal instability continues to increase.
Low- level shear and helicity remain quite strong, so mini
supercells may be capable of producing tornadoes. This threat will
continue at least over the next few hours as the MCV progress
through south- central Illinois.
Farther southwest, additional showers and thunderstorms are expected
to develop farther southwest along the trailing cold front. Exactly
where and when is not certain, but my best guess would be near the
Missouri-Kansas border where surface convergence is located. At
least scattered storms should develop farther northeast eventually
along the boundary, with storms moving east/southeast in time. How
organized this convection will be is also uncertain as there are a
couple of limiting factors including: 1) weak surface convergence
along the boundary and 2) modest height rises behind the MCV. In
addition, the prior storms have at least helped limit instability
slightly, with MLCAPE values of 1000-1500 J/kg. Effective shear also
decreases behind the MCV, though is still near 30 knots. A mixed
mode of convection seems most likely, with multicellular clusters,
small bowing segments, and transient supercells all possible.
Damaging winds and a tornado or two are possible through late
evening before storms begin to move out to the southeast. Locally
heavy rainfall is also possible given high precipitable water values
(~1.9"). Afternoon/evening storms are however focused farther
southwest. Storms also should be progressive, so overall I think the
flash flood threat is low and likely would be isolated to any areas
that do experience some training.
Gosselin
&&
.LONG TERM... (Monday through Next Sunday)
Issued at 324 PM CDT Sun Jun 21 2026
(Monday - Monday Night)
Cooler weather along with northerly winds and clouds are
expected on Monday. High temperatures are only expected to reach
into the mid 70s, or about 10 degrees below normal for the date.
Lows Monday night are forecast to drop into the mid 50s to near the
60 degree mark.
(Tuesday - Next Sunday)
Not much has changed with respect to the work week forecast with
broad northwest flow aloft across the Mississippi Valley. There is
high confidence in seasonally cool temperatures with mostly dry
weather expected outside of a cold frontal passage
Wednesday/Wednesday night.
Moderating temperatures are forecast heading into next weekend with
flow aloft becoming more zonal. That means increasing
moisture/instability as well and increasing chances of showers and
thunderstorms.
Gosselin
&&
.AVIATION... (For the 18z TAFs through 18z Monday Afternoon)
Issued at 1227 PM CDT Sun Jun 21 2026
Showers and thunderstorms are expected to move out of the metro
St. Louis terminals over the next 2 hours. Additional development
is expected later this afternoon, but may be just south of both
central Missouri and St. Louis terminals. The actual cold front
should move through from northwest to southeast through tonight,
with winds veering from the southwest to the northwest and
eventually north/northeast through the period. Low stratus is also
forecast behind this front, with a period of IFR ceilings likely.
Gosselin
&&
.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch until 1 AM CDT Monday for Franklin MO-Saint Charles
MO-Saint Louis City MO-Saint Louis MO.
Flood Watch through Monday morning for Crawford MO-Iron MO-
Jefferson MO-Madison MO-Reynolds MO-Saint Francois MO-
Sainte Genevieve MO-Washington MO.
Flood Watch until 7 PM CDT this evening for Boone MO-Callaway MO-
Cole MO-Gasconade MO-Lincoln MO-Moniteau MO-Montgomery MO-
Osage MO-Warren MO.
IL...Flood Watch until 1 AM CDT Monday for Bond IL-Fayette IL-Greene
IL-Jersey IL-Macoupin IL-Madison IL-Montgomery IL.
Flood Watch through Monday morning for Clinton IL-Marion IL-
Monroe IL-Randolph IL-Saint Clair IL-Washington IL.
Flood Watch until 7 PM CDT this evening for Calhoun IL.
&&
WFO LSXIn the hours before
Local storm report, Jun 21, 4:15 PM CDT, 1 hour 20 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
415 PM CDT Sun Jun 21 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0401 PM Tstm Wnd Dmg 2 NW Saint Paul 38.87N 88.98W
06/21/2026 Fayette IL Trained Spotter
Multiple trees down, multiple branches
strewn about, and power lines down along CR
1900N near N 1300E.
&&
LSJLocal storm report, Jun 21, 4:40 PM CDT, 55 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
440 PM CDT Sun Jun 21 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0435 PM Flash Flood 4 W Saint Paul 38.85N 89.02W
06/21/2026 Fayette IL Trained Spotter
4+ inches of running water over farm roads,
ponding in fields.
&&
CarneyLocal storm report, Jun 21, 4:41 PM CDT, 54 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
441 PM CDT Sun Jun 21 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0438 PM Tornado 2 E Alma 38.73N 88.87W
06/21/2026 Marion IL Emergency Mngr
Emergency manager reported a funnel. Passed
along a report from firemen saying tornado
on the ground headed east toward Forbes
State Park.
&&
LSJLocal storm report, Jun 21, 5:14 PM CDT, 21 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
514 PM CDT Sun Jun 21 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0511 PM Funnel Cloud 3 W Saint Paul 38.85N 89.01W
06/21/2026 Fayette IL Broadcast Media
Report of funnel cloud from Fox 2 Storm
Runner broadcast.
&&
LSJLocal storm report, Jun 21, 5:19 PM CDT, 16 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
519 PM CDT Sun Jun 21 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0511 PM Tornado 3 W Saint Paul 38.85N 89.01W
06/21/2026 Fayette IL Broadcast Media
Corrects previous funnel cloud report from 3
W Saint Paul. Report of funnel cloud from
Fox 2 Storm Runner broadcast. Funnel
reportedly touched ground briefly.
&&
LSJLocal storm report, Jun 21, 5:35 PM CDT, 0 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
535 PM CDT Sun Jun 21 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0526 PM Tornado 2 NNE Vernon 38.82N 89.08W
06/21/2026 Marion IL Broadcast Media
Fox 2 Storm Runner caught brief touchdown
about 1 mile north of Vernon just east of
Hwy 51.
&&
LSJThe 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, 5:40 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, 6:08 PM CDT | Tornado Warning | LSX | Marion | 10 min |
| Jun 21, 6:15 PM CDT | Tornado Warning | LSX | Marion | 37 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2026Every severe thunderstorm warning 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.