Alert archive / Missouri / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 252, NWS St. Louis, MO

May 26, 2024Madison County, Saint Clair County, Illinois; Saint Charles County, Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 26, 2024, 5:11 PM CDT for Madison County, Saint Clair County, Illinois; Saint Charles County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 38 min. 11 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, 5:11 PM CDT (22:11 UTC)
Expired: May 26, 2024, 5:49 PM CDT
In force: 38 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Damage threat: Considerable
Hail: 2.0 in
Wind: 70.0 mph

Counties Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 42 km from the middle of the area, began a volume at 22:15 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, 5:12 PM CDT	HAIL 1.5	1 Ne Bridgeton, MO
May 26, 5:15 PM CDT	HAIL 1	Florissant, MO
May 26, 5:18 PM CDT	HAIL 1	2 Wnw Hazelwood, MO
May 26, 5:18 PM CDT	HAIL 1.5	1 Nw Hazelwood, MO	location approximate.
May 26, 5:20 PM CDT	HAIL 1	1 W Ferguson, MO	Time estimated from radar.
May 26, 5:34 PM CDT	HAIL 1	1 S Pontoon Beach, IL
May 26, 5:50 PM CDT	HAIL 1.75	1 S Maplewood, MO
May 26, 5:52 PM CDT	HAIL 1	1 Sw Frontenac, MO	Report from mPING: Quarter (1.00 in.).
May 26, 5:54 PM CDT	HAIL 1.5	1 N Webster Groves, MO	Report from mPING: Ping Pong Ball (1.50 in.).
May 26, 5:55 PM CDT	TSTM WND GST 60	Granite City, IL	Corrects previous hail report from Granite City.
May 26, 5:55 PM CDT	HAIL 2	Granite City, IL

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, 10.2 hours before the alert went out and 211 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.

350 
WUUS53 KLSX 262211
SVRLSX
ILC119-163-MOC183-189-510-262300-
/O.NEW.KLSX.SV.W.0252.240526T2211Z-240526T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
511 PM CDT Sun May 26 2024

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Western Madison County in southwestern Illinois...
  Northwestern St. Clair County in southwestern Illinois...
  St. Louis City in east central Missouri...
  Northeastern St. Charles County in east central Missouri...
  Northeastern St. Louis County in east central Missouri...

* Until 600 PM CDT.

* At 511 PM CDT, a severe thunderstorm was located over Lambert-St.
  Louis International Airport, moving east at 30 mph.

  HAZARD...Two inch hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* This severe thunderstorm will be near...
  Florissant, Hazelwood, Ferguson, Overland, Jennings, Berkeley, 
  Black Jack, St. John, Dellwood, and Normandy around 515 PM CDT.
  St. Louis, Bellefontaine Neighbors, Riverview, Spanish Lake, Pine 
  Lawn, Moline Acres, Flordell Hills, and Glasgow Village around 520 
  PM CDT.
  Madison around 525 PM CDT.
  Granite City and West Alton around 530 PM CDT.

Other locations in the path of this severe thunderstorm include
Pontoon Beach, Hartford, Edwardsville, South Roxana and Roxana.

This includes the following highways...
 Interstate 64 in Illinois near exit 9.
 Interstate 70 in Missouri near exit 231.

This also includes Scott Joplin Historic Site, Confluence State Park,
and Horseshoe Lake State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Illinois...and east central Missouri.

&&

LAT...LON 3856 8999 3859 9048 3886 9048 3900 9006
TIME...MOT...LOC 2211Z 267DEG 26KT 3876 9038 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Jaja

3 follow-up statements

562 
WWUS53 KLSX 262221
SVSLSX

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

ILC119-163-MOC183-189-510-262300-
/O.CON.KLSX.SV.W.0252.000000T0000Z-240526T2300Z/
Madison IL-St. Clair IL-St. Louis City MO-St. Charles MO-
St. Louis MO-
521 PM CDT Sun May 26 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR WESTERN MADISON AND NORTHWESTERN ST. CLAIR COUNTIES IN
SOUTHWESTERN ILLINOIS...NORTHEASTERN ST. CHARLES AND NORTHEASTERN ST.
LOUIS COUNTIES IN EAST CENTRAL MISSOURI AND ST. LOUIS CITY...

At 520 PM CDT, a severe thunderstorm was located over Dellwood,
moving east at 30 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

SOURCE...Trained weather spotters. At 520 PM ping pong ball sized 
         hail was reported in Hazelwood.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

This severe storm will be near...
  St. Louis, Ferguson, Jennings, Bellefontaine Neighbors, Black 
  Jack, Dellwood, Madison, Riverview, Spanish Lake, and Moline Acres 
  around 525 PM CDT.
  Granite City and West Alton around 530 PM CDT.

Other locations in the path of this severe thunderstorm include
Edwardsville, Pontoon Beach, South Roxana, Hartford and Roxana.

This also includes Scott Joplin Historic Site, Confluence State Park,
and Horseshoe Lake State Park.
 
This includes Interstate 64 in Illinois near exit 9.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Illinois...and east central Missouri.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3856 8999 3859 9042 3888 9043 3900 9006
TIME...MOT...LOC 2220Z 267DEG 26KT 3876 9029 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Jaja

019 
WWUS53 KLSX 262241
SVSLSX

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

ILC163-MOC183-189-510-262250-
/O.CAN.KLSX.SV.W.0252.000000T0000Z-240526T2300Z/
St. Clair IL-St. Louis City MO-St. Charles MO-St. Louis MO-
541 PM CDT Sun May 26 2024

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ST. CLAIR...
NORTHEASTERN ST. CHARLES AND NORTHEASTERN ST. LOUIS COUNTIES AND ST.
LOUIS CITY IS CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Illinois...and east central Missouri.

&&

LAT...LON 3866 9018 3869 9020 3872 9021 3875 9018
      3877 9017 3879 9012 3884 9011 3888 9016
      3889 9021 3890 9022 3896 9005 3866 9001
TIME...MOT...LOC 2240Z 267DEG 26KT 3877 9010 

$$

ILC119-262300-
/O.CON.KLSX.SV.W.0252.000000T0000Z-240526T2300Z/
Madison IL-
541 PM CDT Sun May 26 2024

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR WESTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS...

At 540 PM CDT, a severe thunderstorm was located near Granite City,
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...
  Edwardsville, Pontoon Beach, South Roxana, Roxana and Hartford.

This also includes Horseshoe Lake State Park.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Illinois...and east central Missouri.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3866 9018 3869 9020 3872 9021 3875 9018
      3877 9017 3879 9012 3884 9011 3888 9016
      3889 9021 3890 9022 3896 9005 3866 9001
TIME...MOT...LOC 2240Z 267DEG 26KT 3877 9010 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Jaja

423 
WWUS53 KLSX 262249 RRA
SVSLSX

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

ILC119-262259-
/O.CAN.KLSX.SV.W.0252.000000T0000Z-240526T2300Z/
Madison IL-
549 PM CDT Sun May 26 2024

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MADISON COUNTY IN
SOUTHWESTERN ILLINOIS IS CANCELLED...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CDT for southwestern
Illinois...and east central Missouri.

&&

LAT...LON 3866 9018 3869 9020 3872 9021 3875 9018
      3877 9017 3879 9012 3884 9011 3888 9016
      3889 9021 3890 9022 3896 9005 3866 9001
TIME...MOT...LOC 2246Z 267DEG 26KT 3877 9001 

$$

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, 5:29 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, 6:09 PM CDT	Tornado Warning	LSX	Saint Clair	51 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
May 26, 12:31 AM CDT	Severe Thunderstorm Warning	LSX	Moniteau	29 min
May 26, 12:57 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	33 min
May 26, 5:37 AM CDT	Severe Thunderstorm Warning	LSX	Reynolds	38 min
May 26, 5:59 AM CDT	Severe Thunderstorm Warning	LSX	Iron	46 min
May 26, 6:15 AM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Francois	45 min
May 26, 6:40 AM CDT	Areal Flood Advisory	LSX	Boone, Callaway	3 hr
May 26, 3:17 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	43 min
May 26, 3:30 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	45 min
May 26, 3:45 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	45 min
May 26, 3:46 PM CDT	River Flood Warning	LSX	Reynolds	65 hr
May 26, 4:06 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	39 min
May 26, 4:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Franklin, Gasconade, Warren	51 min
May 26, 4:14 PM CDT	Areal Flood Advisory	LSX	Cole, Osage	3 hr
May 26, 4:37 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	38 min
May 26, 4:39 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	51 min
May 26, 4:47 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Warren	43 min
May 26, 4:58 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	35 min
May 26, 5:01 PM CDT	Areal Flood Advisory	LSX	Saint Charles, Saint Louis	3 hr
May 26, 5:05 PM CDT	Areal Flood Advisory	LSX	Franklin, Gasconade, Montgomery, Saint Charles, Warren	3 hr
May 26, 5:09 PM CDT	Tornado Warning	LSX	Franklin, Jefferson, Saint Louis	51 min
May 26, 5:27 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Saint Charles, Saint Louis	35 min
May 26, 5:49 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	41 min
May 26, 6:06 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	39 min
May 26, 6:09 PM CDT	Tornado Warning	LSX	Reynolds	51 min
May 26, 6:16 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Washington	44 min
May 26, 6:30 PM CDT	Areal Flood Advisory	LSX	City of Saint Louis	3 hr
May 26, 6:46 PM CDT	Tornado Warning	LSX	Reynolds	27 min
May 26, 6:51 PM CDT	Tornado Warning	LSX	Iron, Madison, Reynolds	39 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2024 Severe Thunderstorm Warnings in Illinois, 2024 Every severe thunderstorm warning 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.