Alert archive / Illinois / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 375, NWS St. Louis, MO

November 4, 2024Calhoun County, Jersey County, Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Nov 4, 2024, 10:03 PM CST for Calhoun County, Jersey County, Madison County, Illinois; Saint Charles County, Saint Louis County, Missouri. It was in force for 42 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: Nov 4, 2024, 10:03 PM CST (04:03 UTC)
Expired: Nov 4, 2024, 10:45 PM CST
In force: 42 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Calhoun County, IL, Jersey County, IL, Madison County, IL, Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 26 km from the middle of the area, began a volume at 04:02 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.1 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 612 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 249 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

311 
WUUS53 KLSX 050403
SVRLSX
ILC013-083-119-MOC183-189-050445-
/O.NEW.KLSX.SV.W.0375.241105T0403Z-241105T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1003 PM CST Mon Nov 4 2024

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Calhoun County in southwestern Illinois...
  Southeastern Jersey County in southwestern Illinois...
  Northwestern Madison County in southwestern Illinois...
  Northeastern Saint Charles County in east central Missouri...
  Northeastern Saint Louis County in east central Missouri...

* Until 1045 PM CST.

* At 1003 PM CST, severe thunderstorms were located along a line 
  from 7 miles north of St. Peters to over Cottleville, or along a 
  line from 6 miles east of St. Paul to over Cottleville, moving 
  northeast at 40 mph.

  HAZARD...60 mph wind gusts and small hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  St. Peters, Cottleville, Weldon Spring, O'Fallon, Dardenne Prairie 
  and St. Paul around 1005 PM CST.
  St. Charles and Harvester around 1010 PM CST.

Other locations impacted by the severe thunderstorm include 
Kampville, Golden Eagle, Brussels, Deer Plain, Otterville, McClusky 
and Delhi.

This includes the following State Parks...
Confluence State Park, First Missouri State Capitol Historic Site 
and Pere Marquette State Park.

This includes Interstate 70 in Missouri between exits 217 and 231.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from 
windows. These storms are capable of producing damaging winds.

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 3889 9073 3892 9069 3891 9068 3919 9028
      3904 9018 3881 9010 3871 9073 3881 9072
TIME...MOT...LOC 0403Z 238DEG 34KT 3888 9064 3883 9063 3874 9066

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

$$

MRB

2 follow-up statements

450 
WWUS53 KLSX 050420
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1020 PM CST Mon Nov 4 2024

ILC013-050430-
/O.CAN.KLSX.SV.W.0375.000000T0000Z-241105T0445Z/
Calhoun IL-
1020 PM CST Mon Nov 4 2024

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTHEASTERN CALHOUN 
COUNTY...

The storms which prompted the warning have moved out of the area. 
Therefore, the warning has been cancelled. However, gusty winds and 
heavy rain are still possible with these thunderstorms.

&&

LAT...LON 3892 9049 3893 9048 3895 9048 3896 9047
      3897 9045 3915 9025 3904 9018 3881 9010
      3881 9012 3877 9048 3877 9060 3884 9054
TIME...MOT...LOC 0403Z 238DEG 34KT 3888 9063 3883 9062 3875 9065

$$


ILC083-119-MOC183-189-050445-
/O.CON.KLSX.SV.W.0375.000000T0000Z-241105T0445Z/
Jersey IL-Madison IL-Saint Charles MO-Saint Louis MO-
1020 PM CST Mon Nov 4 2024

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CST 
FOR SOUTHEASTERN JERSEY AND NORTHWESTERN MADISON COUNTIES IN 
SOUTHWESTERN ILLINOIS AND NORTHEASTERN SAINT CHARLES AND 
NORTHEASTERN SAINT LOUIS COUNTIES IN EAST CENTRAL MISSOURI...

At 1020 PM CST, severe thunderstorms were located along a line from 
over Grafton to over St. Charles, or along a line from 11 miles 
north of Hazelwood to over St. Charles, moving northeast at 40 mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

This severe thunderstorm will be near...
  St. Peters around 1005 PM CST.
  St. Charles around 1010 PM CST.

Other locations impacted by the severe thunderstorm include McClusky 
and Delhi.

This includes the following State Parks...
Confluence State Park and First Missouri State Capitol Historic Site.

This includes Interstate 70 in Missouri between exits 225 and 228.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from 
windows. These storms are capable of producing damaging winds.

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 3892 9049 3893 9048 3895 9048 3896 9047
      3897 9045 3915 9025 3904 9018 3881 9010
      3881 9012 3877 9048 3877 9060 3884 9054
TIME...MOT...LOC 0403Z 243DEG 35KT 3887 9062 3877 9064 3872 9068

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

$$

MRB

599 
WWUS53 KLSX 050442
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1042 PM CST Mon Nov 4 2024

ILC083-119-MOC183-189-050452-
/O.EXP.KLSX.SV.W.0375.000000T0000Z-241105T0445Z/
Jersey IL-Madison IL-Saint Charles MO-Saint Louis MO-
1042 PM CST Mon Nov 4 2024

...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 1045 PM CST FOR 
SOUTHEASTERN JERSEY AND NORTHWESTERN MADISON COUNTIES IN 
SOUTHWESTERN ILLINOIS AND NORTHEASTERN SAINT CHARLES AND 
NORTHEASTERN SAINT LOUIS COUNTIES IN EAST CENTRAL MISSOURI...

The storms which prompted the warning have weakened below severe 
limits, and no longer pose an immediate threat to life or property. 
Therefore, the warning will be allowed to expire. However, gusty 
winds and heavy rain are still possible with these thunderstorms.

&&

LAT...LON 3892 9049 3893 9048 3895 9048 3896 9047
      3897 9045 3915 9025 3904 9018 3881 9010
      3881 9012 3877 9048 3877 9060 3884 9054
TIME...MOT...LOC 0420Z 243DEG 35KT 3895 9043 3884 9045 3879 9050

$$

MRB

What 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 Nov 4, 5:42 PM CST, 4 hours 21 minutes earlier. Its key messages:

Showers and thunderstorms will continue through tonight. A few severe thunderstorms will be possible this evening, particularly over central and east central Missouri. The primary threats will be large hail and damaging winds.
Rain will move out of the area by late Tuesday leaving Wednesday and Thursday. There will be additional chances of rain over the weekend.

Area forecast discussion, Nov 4, 5:42 PM CST, 4 hours 21 minutes before

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
542 PM CST Mon Nov 4 2024

.KEY MESSAGES...

- Showers and thunderstorms will continue through tonight. A few
severe thunderstorms will be possible this evening, particularly
over central and east central Missouri.  The primary threats will be
large hail and damaging winds.

- Rain will move out of the area by late Tuesday leaving Wednesday
and Thursday.  There will be additional chances of rain over the
weekend.

&&

.SHORT TERM...  (Through Late Tuesday Night)
Issued at 330 PM CST Mon Nov 4 2024

A band of showers and scattered thunderstorms that has produced
flooding over southeast Missouri into southwest Illinois today has
begun to lift northward this afternoon along weak boundary.  It will
continue to lift northward into the northern CWA through early
evening.  Strong to severe thunderstorms are currently moving into
western Missouri ahead of a cold front.  Latest mesoanalysis is
showing 500-1000+ J/kg of MLCAPE along along the MO/AR state line
that the RAP has moving north into central MO by 00Z.  CAMS have the
current line of storms moving east into the CWA by early this
evening and then slowly progressing east ahead of the front through
the across eastern MO/SW IL during the late evening and overnight
hours.  The combination of instability and deep/low layer shear
still favors a few severe storms capable of producing damaging
winds and isolated tornadoes over central and east central MO this
evening. The chance for severe weather will decrease overnight as
the line moves into less instability. In addition, another 1-2"+
of rainfall will be possible through tomorrow, but the axis of
heaviest rainfall will now be over the northwest third of the CWA
which will limit additional flooding.

The chance for showers and scattered thunderstorms will continue
into Tuesday as the front slowly moves east across the area. The
front will not clear the area until late in the day, so the chances
will remain high (70-90%) over thee Illinois counties into the
afternoon.

Britt

&&

.LONG TERM...  (Wednesday through Next Monday)
Issued at 330 PM CST Mon Nov 4 2024

Mainly dry weather is still expected Wednesday into Thursday night
as an upper ridge moves across the area.  The LREF is showing the
next upper trough moving the Midwest on Saturday night which will
bring rain chances to the area from Friday to Sunday with the best
chances (70-90%) on Saturday and Saturday night.  Temperatures will
remain seasonable through the weekend.

Britt

&&

.AVIATION...  (For the 00z TAFs through 00z Tuesday Evening)
Issued at 533 PM CST Mon Nov 4 2024

Occasional showers and scattered thunderstorms are expected to
affect the terminals through the evening into the overnight hours
and then move out on Tuesday morning. A few of these storms could
produce wind gusts over 35 knots and small hail. MVFR and IFR
ceilings and visibilities can be expected with this activity
before improving to VFR by late morning and early afternoon.

Britt

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

WFO LSX

Hazardous weather outlook, Nov 4, 1:54 PM CST, 8 hours 9 minutes before

Hazardous Weather Outlook
National Weather Service St Louis MO
154 PM CST Mon Nov 4 2024

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-052000-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
154 PM CST Mon Nov 4 2024

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...This afternoon and tonight.

Thunderstorms are expected through tonight. Some could be severe,
mainly in central Missouri this evening. The primary threats are
damaging winds and a few tornadoes, along with locally heavy
rainfall.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms will end on Tuesday morning. Otherwise no hazardous
weather is expected.

.SPOTTER INFORMATION STATEMENT...

Spotters activation will be likely tonight.

Britt

In the hours before

Local storm report, Nov 4, 5:05 PM CST, 4 hours 58 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
505 PM CST Mon Nov 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     Rain             Staunton                39.01N 89.79W
11/04/2024  E1.60 Inch       Macoupin           IL   Trained Spotter

            Storm total so far.

&&

Pfahler

Local storm report, Nov 4, 5:38 PM CST, 4 hours 25 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
538 PM CST Mon Nov 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0535 PM     Rain             Saint Peters            38.77N 90.60W
11/04/2024  M2.79 Inch       St. Charles        MO   NWS Employee

            Storm total. 1.22 inches since 7 am.

&&

Britt

Local storm report, Nov 4, 5:41 PM CST, 4 hours 22 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
541 PM CST Mon Nov 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0539 PM     Rain             1 S Mine La Motte       37.61N 90.29W
11/04/2024  M6.00 Inch       Madison            MO   Public

            Storm total as of 5:30 PM.

&&

BRC

Local storm report, Nov 4, 5:54 PM CST, 4 hours 9 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
554 PM CST Mon Nov 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     Rain             1 SSE Ste. Genevieve    37.96N 90.04W
11/04/2024  M6.84 Inch       Ste. Genevieve     MO   Trained Spotter

            Storm total so far.

&&

Pfahler

Local storm report, Nov 4, 7:02 PM CST, 3 hours 1 minute before

Preliminary Local Storm Report
National Weather Service St Louis MO
702 PM CST Mon Nov 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0701 PM     Rain             Ferguson                38.74N 90.30W
11/04/2024  M4.18 Inch       St. Louis          MO   Public

            Storm total so far.

&&

Pfahler

Local storm report, Nov 4, 9:00 PM CST, 1 hour 3 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
900 PM CST Mon Nov 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0859 PM     Rain             Staunton                39.01N 89.79W
11/04/2024  M3.00 Inch       Macoupin           IL   Trained Spotter

            Storm total so far.

&&

Pfahler

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 4, 7:43 PM CST	Flood Watch	LSX	Bond, Clinton, Fayette, Madison, Marion, Monroe and 3 more	16 hr
Nov 5, 2:39 AM CST	Flash Flood Warning	LSX	Madison, Monroe, Saint Clair	5 hr
Nov 4, 8:18 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Gasconade, Osage	42 min
Nov 4, 9:11 PM CST	Areal Flood Advisory	LSX	Franklin, Gasconade, Warren	3 hr
Nov 4, 9:38 PM CST	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles	37 min
Nov 4, 9:44 PM CST	Tornado Warning Tornado observed	LSX	Lincoln, Saint Charles	16 min
Nov 4, 9:49 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	41 min
Nov 4, 9:51 PM CST	River Flood Warning	LSX	Boone	10 hr
Nov 4, 10:17 PM CST	Areal Flood Advisory	LSX	Crawford	4 hr
Nov 5, 12:13 AM CST	Areal Flood Advisory	LSX	Franklin, Saint Charles	3 hr
Nov 5, 12:16 AM CST	Areal Flood Advisory	LSX	Franklin, Gasconade, Warren	119 min
Nov 5, 12:55 AM CST	Areal Flood Advisory	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	3 hr
Nov 5, 1:20 AM CST	Areal Flood Advisory	LSX	Crawford, Franklin, Jefferson, Washington	3 hr
Nov 5, 1:26 AM CST	Flash Flood Warning	LSX	Franklin, Jefferson, Washington	5 hr
Nov 5, 3:13 AM CST	Flash Flood Warning	LSX	Crawford, Franklin, Washington	3 hr
Nov 5, 3:23 AM CST	River Flood Warning	LSX	Saint Charles	28 hr
Nov 5, 4:36 AM CST	River Flood Warning	LSX	Crawford, Washington	3 days
Nov 5, 4:42 AM CST	River Flood Warning	LSX	Crawford	55 hr
Nov 5, 6:25 AM CST	Areal Flood Warning	LSX	Crawford, Franklin, Jefferson, Washington	8 hr
Nov 5, 6:57 AM CST	Areal Flood Warning	LSX	Saint Louis, City of Saint Louis	5 hr
Nov 5, 7:44 AM CST	River Flood Warning	LSX	Jefferson, Saint Louis	5 days
Nov 5, 7:44 AM CST	River Flood Warning	LSX	Jefferson, Saint Louis	7 days
Nov 5, 7:44 AM CST	River Flood Warning	LSX	Jefferson, Saint Louis	21 days
Nov 5, 7:44 AM CST	River Flood Warning	LSX	Franklin, Jefferson	4 days
Nov 5, 7:44 AM CST	River Flood Warning	LSX	Jefferson, Saint Louis	5 days
Nov 5, 7:49 AM CST	River Flood Warning	LSX	Franklin	3 days
Nov 5, 10:35 AM CST	River Flood Warning	LSX	Lincoln	13 hr
Nov 5, 11:38 AM CST	River Flood Warning	LSX	Osage	4 days
Nov 5, 1:57 PM CST	Areal Flood Warning	LSX	Franklin, Jefferson	6 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2024 Severe Thunderstorm Warnings in Missouri, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.