Alert archive / Missouri / Tornado Warnings in 2024

Tornado Warning 77, NWS St. Louis, MO

October 31, 2024Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this tornado warning at Oct 31, 2024, 2:26 AM CDT for Saint Charles County, Saint Louis County, Missouri. It was in force for 28 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: Oct 31, 2024, 2:26 AM CDT (07:26 UTC)
Expired: Oct 31, 2024, 2:54 AM CDT
In force: 28 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Saint Charles County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 20 km from the middle of the area, began a volume at 07:28 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.4 hours before the alert went out and 228 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: 17 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1444 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

971 
WFUS53 KLSX 310726
TORLSX
MOC183-189-310800-
/O.NEW.KLSX.TO.W.0077.241031T0726Z-241031T0800Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
226 AM CDT Thu Oct 31 2024

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Central Saint Charles County in east central Missouri...
  Central Saint Louis County in east central Missouri...

* Until 300 AM CDT.

* At 226 AM CDT, a severe thunderstorm capable of producing a 
  tornado was located over Cottleville, moving east at 45 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...
  St. Louis, O'Fallon, St. Charles, St. Peters, Florissant, 
  Chesterfield, Wildwood, University City, Ballwin, Kirkwood, 
  Maryland Heights, Hazelwood, Webster Groves, Ferguson, Creve 
  Coeur, Overland, Clayton, Jennings, St. Ann and Bridgeton.

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

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

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 3881 9072 3882 9027 3868 9028 3866 9030
      3863 9031 3861 9031 3860 9032 3858 9032
      3865 9071 3867 9075
TIME...MOT...LOC 0726Z 280DEG 38KT 3873 9067

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

$$

Gosselin

2 follow-up statements

997 
WWUS53 KLSX 310744
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
244 AM CDT Thu Oct 31 2024

MOC183-310754-
/O.CAN.KLSX.TO.W.0077.000000T0000Z-241031T0800Z/
Saint Charles MO-
244 AM CDT Thu Oct 31 2024

...TORNADO WARNING IS CANCELLED FOR CENTRAL SAINT CHARLES COUNTY...

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

&&

LAT...LON 3866 9030 3863 9031 3862 9031 3860 9032
      3866 9054 3868 9057 3868 9055 3870 9053
      3873 9053 3875 9050 3876 9049 3882 9045
      3882 9027 3868 9028
TIME...MOT...LOC 0726Z 280DEG 38KT 3873 9067

$$


MOC189-310800-
/O.CON.KLSX.TO.W.0077.000000T0000Z-241031T0800Z/
Saint Louis MO-
244 AM CDT Thu Oct 31 2024

...TORNADO WARNING REMAINS IN EFFECT UNTIL 3 AM CDT FOR NORTH 
CENTRAL SAINT LOUIS COUNTY...

At 244 AM CDT, a severe thunderstorm capable of producing a tornado 
was located over Creve Coeur, moving east at 45 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...
  St. Louis, St. Charles, Florissant, Chesterfield, University City, 
  Maryland Heights, Hazelwood, Webster Groves, Ferguson, Creve 
  Coeur, Overland, Clayton, Jennings, St. Ann, Bridgeton, Town and 
  Country, Berkeley, Richmond Heights, Ladue and Brentwood.

This includes Interstate 70 in Missouri near exit 231.

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 3866 9030 3863 9031 3862 9031 3860 9032
      3866 9054 3868 9057 3868 9055 3870 9053
      3873 9053 3875 9050 3876 9049 3882 9045
      3882 9027 3868 9028
TIME...MOT...LOC 0726Z 280DEG 38KT 3873 9067

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

$$

Gosselin

198 
WWUS53 KLSX 310754
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
254 AM CDT Thu Oct 31 2024

MOC189-310804-
/O.CAN.KLSX.TO.W.0077.000000T0000Z-241031T0800Z/
Saint Louis MO-
254 AM CDT Thu Oct 31 2024

...TORNADO WARNING IS CANCELLED FOR NORTH CENTRAL SAINT LOUIS 
COUNTY...

The storm which prompted the warning has weakened below severe 
limits, and no longer appears capable of producing a tornado. 
Therefore, the warning has been cancelled.

&&

LAT...LON 3866 9030 3863 9031 3862 9031 3860 9032
      3866 9054 3868 9057 3868 9055 3870 9053
      3873 9053 3875 9050 3876 9049 3882 9045
      3882 9027 3868 9028
TIME...MOT...LOC 0744Z 280DEG 38KT 3870 9043

$$

Gosselin

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 30, 10:32 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Shelby	43 min
Oct 30, 11:07 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion, Ralls	53 min
Oct 31, 1:34 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	43 min
Oct 31, 1:45 AM CDT	Tornado Warning	LSX	Franklin, Warren	30 min
Oct 31, 2:15 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, City of Saint Louis	39 min

Nearby

Tornado Warnings in Missouri, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.