Alert archive / Illinois / Tornado Warnings in 2024

Tornado Warning 63, NWS St. Louis, MO

May 26, 2024Saint Clair County, Illinois

NWS St. Louis, MO issued this tornado warning at May 26, 2024, 6:09 PM CDT for Saint Clair County, Illinois. It was in force for 51 min. 14 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: May 26, 2024, 6:09 PM CDT (23:09 UTC)
Expired: May 26, 2024, 7:00 PM CDT
In force: 51 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.5 in

County Saint Clair County, IL

The radar

The St Louis radar (KLSX), 72 km from the middle of the area, began a volume at 23:10 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
May 26, 6:18 PM CDT	TSTM WND DMG	2 Se Belleville, IL	Very large tree blown over, at least 3 ft in diameter. Time estimated by radar.
May 26, 6:19 PM CDT	TSTM WND DMG	2 Ese Belleville, IL	Large tree down. Time estimated from radar.
May 26, 6:20 PM CDT	TSTM WND DMG	3 Ssw Shiloh, IL	Large tree limb down.
May 26, 6:20 PM CDT	TSTM WND DMG	5 Se Belleville, IL	Corrects previous tstm wnd dmg report from 5 SE Belleville. Multiple trees down at the Green Mount Cemetery. Time estimated from radar.
May 26, 6:20 PM CDT	TSTM WND DMG	Belleville, IL	Widespread tree branches snapped around downtown Belleville, aluminum flashing peeled off building in the 500 block of East B Street.
May 26, 6:20 PM CDT	HAIL 1.75	1 Sw Belleville, IL
May 26, 6:22 PM CDT	HAIL 1.5	2 W Belleville, IL	Report from mPING: Ping Pong Ball (1.50 in.).
May 26, 6:23 PM CDT	HAIL 1.25	Belleville, IL	report from social media.
May 26, 6:27 PM CDT	TSTM WND DMG	3 Se Swansea, IL	Tree snapped near base and fell on house. Time estimated from radar and public report.
May 26, 6:27 PM CDT	HAIL 1	1 Wnw Swansea, IL
May 26, 6:27 PM CDT	HAIL 1.75	2 Ese Belleville, IL
May 26, 6:31 PM CDT	HAIL 1	2 E Fairview Heights, IL
May 26, 6:34 PM CDT	TORNADO	3 Wnw New Baden, IL	A weak EF1 tornado with maximum wind speeds of 90mph tracked immediately southwest of New Baden and through Damiansville occasionally snapping large tree branches, removing a large portion of a commercial garage roof, and causing minor roof damage before lifti
May 26, 6:37 PM CDT	TSTM WND GST 61	1 E Scott Afb, IL	KBLV measured 61 mph.

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
May 26, 4:01 PM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.2 hours before the alert went out and 216 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: 394 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 251 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

289 
WFUS53 KLSX 262309
TORLSX
ILC163-270000-
/O.NEW.KLSX.TO.W.0063.240526T2309Z-240527T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
609 PM CDT Sun May 26 2024

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northeastern St. Clair County in southwestern Illinois...

* Until 700 PM CDT.

* At 608 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Millstadt, moving east at 35 mph.

  HAZARD...Tornado and tennis 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 dangerous storm will be near...
  Belleville around 615 PM CDT.
  Swansea, Freeburg, and Smithton around 620 PM CDT.
  Shiloh around 625 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Mascoutah, Scott AFB and New Baden.

This includes Interstate 64 in Illinois between exits 9 and 27.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid 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 3838 9003 3866 9005 3865 8971 3838 8970
TIME...MOT...LOC 2308Z 268DEG 30KT 3847 9015 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...2.50 IN

$$

Jaja

2 follow-up statements

615 
WWUS53 KLSX 262328 RRA
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
628 PM CDT Sun May 26 2024

ILC163-270000-
/O.CON.KLSX.TO.W.0063.000000T0000Z-240527T0000Z/
St. Clair IL-
628 PM CDT Sun May 26 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
NORTHEASTERN ST. CLAIR COUNTY...

At 627 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Freeburg, moving east at 35 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.

Locations impacted include...
  Shiloh, Mascoutah, Scott AFB and New Baden.

This includes Interstate 64 in Illinois between exits 9 and 27.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid 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 3838 9003 3866 9005 3865 8971 3838 8970
TIME...MOT...LOC 2327Z 268DEG 30KT 3848 8994 

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

$$

Jaja

709 
WWUS53 KLSX 262343
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
643 PM CDT Sun May 26 2024

ILC163-270000-
/O.CON.KLSX.TO.W.0063.000000T0000Z-240527T0000Z/
St. Clair IL-
643 PM CDT Sun May 26 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
NORTHEASTERN ST. CLAIR COUNTY...

At 643 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Mascoutah, 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.

Locations impacted include...
  New Baden.

This includes Interstate 64 in Illinois near exit 27.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid 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 3838 8986 3865 8974 3865 8971 3838 8970
TIME...MOT...LOC 2343Z 270DEG 30KT 3848 8977 

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

$$

Jaja

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 11:50 AM CDT	River Flood Warning	LSX	Jackson, Randolph	4 days
May 26, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	45 min
May 26, 5:03 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	42 min
May 26, 5:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Madison, Saint Clair	38 min
May 26, 5:29 PM CDT	Severe Thunderstorm Warning	LSX	Madison	61 min
May 26, 5:43 PM CDT	Tornado Warning	LSX	Monroe, Saint Clair	47 min
May 26, 5:48 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	15 min
May 26, 6:14 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	46 min
May 26, 6:16 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Madison	59 min
May 26, 6:26 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	49 min
May 26, 6:34 PM CDT	Areal Flood Advisory	LSX	Madison	3 hr
May 26, 6:38 PM CDT	Tornado Warning	LSX	Clinton, Randolph, Saint Clair, Washington	67 min
May 26, 6:44 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Randolph	46 min

Nearby

Tornado Warnings in Illinois, 2024 Every tornado warning in 2024 Tornadoes in 2024

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.