Alert archive / Missouri / Tornado Warnings in 2021

Tornado Warning 51, NWS St. Louis, MO

December 10, 2021Saint Charles County, Saint Louis County, City of Saint Louis, Missouri; Jersey County, Macoupin County, Madison County, Illinois

NWS St. Louis, MO issued this tornado warning at Dec 10, 2021, 8:06 PM CST for Saint Charles County, Saint Louis County, City of Saint Louis, Missouri; Jersey County, Macoupin County, Madison County, Illinois. It was in force for 39 min. 5 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
Dec 10, 2021, 8:06 PM CST (02:06 UTC)
Expired
Dec 10, 2021, 8:45 PM CST
In force
39 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Observed
Hail
1.0 in

Counties Jersey County, IL, Macoupin County, IL, Madison 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 02:09 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

TimeReportWhereRemark
Dec 10, 8:09 PM CSTTSTM WND DMGJerseyville, ILJERSEY COUNTY DISPATCH REPORTED A METAL SIGN AND TREE LIMB DOWN ACROSS THE ROAD AT STATE HWY 16 IN JERSEYVILLE. TIME ESTIMATED USING RADAR.
Dec 10, 8:27 PM CSTTORNADO2 S Poag, ILEMERGENCY MANAGEMENT REPORTED A PARTIAL ROOF COLLAPSE AT AN AMAZON WAREHOUSE SOUTHWEST OF EDWARDSVILLE. MULTIPLE PEOPLE ARE TRAPPED AT THIS TIME.
Dec 10, 8:29 PM CSTTSTM WND DMG2 Ese Mitchell, ILTRACTOR-TRAILER OVERTURNED ON I-270 WB NEAR MILEPOST 7 WITH CABLES ACROSS THE ROADWAY.
Dec 10, 8:33 PM CSTTSTM WND DMG1 S Bunker Hill, ILMACOUPIN COUNTY DISPATCH REPORTED TREE DOWN ON HWY 159. TIME ESTIMATED FROM RADAR.
Dec 10, 8:40 PM CSTTSTM WND DMG4 W Staunton, ILMACOUPIN COUNTY DISPATCH REPORTED POWER LINES DOWN ON SCHOOL HOUSE ROAD EAST OF DORCHESTER ROAD WEST OF STAUNTON. TIME ESTIMATED FROM RADAR.

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.

IssuedProductOfficeLasted
Dec 10, 5:17 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.1 hours before the alert went out and 202 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 119 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 341 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
119 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

514 
WFUS53 KLSX 110206
TORLSX
ILC083-117-119-MOC183-189-510-110245-
/O.NEW.KLSX.TO.W.0051.211211T0206Z-211211T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
806 PM CST Fri Dec 10 2021

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Madison County in southwestern Illinois...
  Southern Macoupin County in southwestern Illinois...
  Southeastern Jersey 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 845 PM CST.
    
* At 805 PM CST, a tornado producing storm was located over
  Bridgeton, moving northeast at 60 mph.

  HAZARD...Damaging tornado and quarter size hail.

  SOURCE...Radar confirmed tornado.

  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 tornadic storm will be near...
  Florissant, Ferguson, Jennings, Dellwood, Northwoods, Pine Lawn, 
  Calverton Park, Country Club Hills, Norwood Court and Pasadena 
  Hills around 810 PM CST.
  St. Louis, Bellefontaine Neighbors, Black Jack, Riverview, Spanish 
  Lake, Moline Acres, West Alton, Castle Point and Glasgow Village 
  around 815 PM CST.
  Alton, Madison and East Alton around 820 PM CST.
  Godfrey, Wood River, Bethalto, South Roxana, Roxana, Hartford and 
  Rosewood Heights around 825 PM CST.

Other locations in the path of this tornadic thunderstorm include
Edwardsville, Dorsey, Bunker Hill, Prairietown, Carpenter, Worden,
Wilsonville, Staunton, Benld, Livingston, Sawyerville, Mount Clare
and Eagarville.

This also includes Scott Joplin Historic Site, Confluence State Park,
First Missouri State Capitol Historic Site, Beaver Dam State Park,
and Horseshoe Lake State Park.
 
This includes the following highways...
 Interstate 70 in Illinois between exits 21 and 24.
 Interstate 55 in Illinois between exits 23 and 37.
 Interstate 70 in Missouri between exits 228 and 231.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 3866 9005 3866 9018 3863 9018 3853 9056
      3892 9050 3897 9045 3897 9049 3908 9047
      3930 8985 3875 8968
TIME...MOT...LOC 0205Z 242DEG 52KT 3877 9041 

TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN

$$

19
1 follow-up statement
806 
WWUS53 KLSX 110216
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
816 PM CST Fri Dec 10 2021

ILC083-117-119-MOC183-189-510-110245-
/O.CON.KLSX.TO.W.0051.000000T0000Z-211211T0245Z/
Madison IL-Macoupin IL-Jersey IL-St. Louis City MO-St. Charles MO-
St. Louis MO-
816 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM CST FOR
MADISON...SOUTHERN MACOUPIN AND SOUTHEASTERN JERSEY COUNTIES IN
SOUTHWESTERN ILLINOIS...NORTHEASTERN ST. CHARLES AND NORTHEASTERN ST.
LOUIS COUNTIES IN EAST CENTRAL MISSOURI AND ST. LOUIS CITY...
    
At 816 PM CST, a severe thunderstorm capable of producing a tornado
was located over West Alton, moving northeast at 60 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.

This dangerous storm will be near...
  Alton, Godfrey, East Alton and Hartford around 820 PM CST.
  Wood River, Bethalto, South Roxana, Roxana and Rosewood Heights 
  around 825 PM CST.

Other locations in the path of this tornadic thunderstorm include
Dorsey, Bunker Hill, Prairietown, Carpenter, Staunton, Worden,
Wilsonville, Gillespie, Benld, Livingston, Sawyerville, Mount Clare,
East Gillespie and Eagarville.

This also includes Scott Joplin Historic Site, Confluence State Park,
Beaver Dam State Park, and Horseshoe Lake State Park.
 
This includes the following highways...
 Interstate 70 in Illinois between exits 21 and 24.
 Interstate 55 in Illinois between exits 23 and 37.

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 3866 9005 3866 9018 3863 9018 3857 9040
      3891 9035 3899 9033 3909 9029 3917 9023
      3930 8985 3875 8968
TIME...MOT...LOC 0216Z 242DEG 52KT 3885 9023 

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

$$

19

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 6:13 PM CSTSevere Thunderstorm WarningLSXBoone, Callaway, Cole, Moniteau47 min
Dec 10, 6:18 PM CSTSevere Thunderstorm WarningLSXCole, Osage42 min
Dec 10, 6:27 PM CSTTornado WarningLSXAudrain, Callaway34 min
Dec 10, 6:30 PM CSTTornado WarningLSXCallaway, Cole, Gasconade, Montgomery, Osage45 min
Dec 10, 6:42 PM CSTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade, Osage48 min
Dec 10, 6:42 PM CSTTornado WarningLSXPike48 min
Dec 10, 6:49 PM CSTTornado WarningLSXFranklin, Gasconade, Osage, Warren41 min
Dec 10, 6:50 PM CSTTornado WarningLSXAudrain, Callaway, Montgomery, Pike, Ralls40 min
Dec 10, 7:00 PM CSTTornado WarningLSXGasconade, Lincoln, Montgomery, Pike, Warren45 min
Dec 10, 7:02 PM CSTTornado WarningLSXCrawford, Franklin, Gasconade43 min
Dec 10, 7:11 PM CSTTornado WarningLSXLincoln, Montgomery, Pike49 min
Dec 10, 7:16 PM CSTTornado WarningLSXFranklin, Lincoln, Saint Charles, Warren44 min
Dec 10, 7:30 PM CSTTornado WarningLSXLincoln45 min
Dec 10, 7:35 PM CSTTornado Warning Tornado observedLSXFranklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren40 min
Dec 10, 7:49 PM CSTSevere Thunderstorm WarningLSXCrawford, Washington26 min
Dec 10, 8:10 PM CSTSevere Thunderstorm WarningLSXFranklin35 min
Dec 10, 8:29 PM CSTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Louis, City of Saint Louis30 min
Dec 10, 8:34 PM CSTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade, Osage41 min
Dec 10, 8:47 PM CSTTornado WarningLSXFranklin, Gasconade, Warren43 min
Dec 10, 9:07 PM CSTSevere Thunderstorm WarningLSXFranklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more38 min
Dec 10, 9:39 PM CSTTornado WarningLSXSaint Charles, Saint Louis51 min
Dec 10, 10:00 PM CSTSevere Thunderstorm WarningLSXIron, Reynolds45 min
Dec 10, 10:05 PM CSTSevere Thunderstorm WarningLSXCity of Saint Louis25 min
Dec 10, 10:14 PM CSTTornado WarningLSXIron, Madison, Reynolds46 min
Dec 10, 10:19 PM CSTSevere Thunderstorm WarningLSXJefferson, Sainte Genevieve, Saint Francois41 min
Dec 10, 10:26 PM CSTSevere Thunderstorm WarningLSXReynolds20 min
Dec 10, 10:55 PM CSTSevere Thunderstorm WarningLSXMadison18 min
Dec 10, 7:16 PM CSTTornado WarningLSXPike14 min
Dec 10, 7:36 PM CSTTornado WarningLSXPike21 min
Dec 10, 8:33 PM CSTTornado Warning Tornado observedConsiderable damage threatLSXBond, Madison42 min
Dec 10, 8:37 PM CSTTornado WarningLSXMacoupin, Madison17 min
Dec 10, 8:44 PM CSTTornado Warning Tornado observedLSXFayette, Macoupin, Madison, Montgomery46 min
Dec 10, 8:56 PM CSTTornado WarningLSXBond, Fayette, Montgomery34 min
Dec 10, 10:18 PM CSTSevere Thunderstorm WarningLSXBond, Fayette, Macoupin, Madison, Montgomery57 min
Dec 10, 10:26 PM CSTTornado WarningLSXBond, Fayette, Montgomery49 min
Dec 10, 10:51 PM CSTSevere Thunderstorm WarningLSXClinton, Saint Clair, Washington39 min
Dec 10, 11:02 PM CSTTornado WarningLSXFayette29 min
Dec 10, 11:10 PM CSTTornado WarningLSXClinton, Marion, Washington50 min

Nearby

Tornado Warnings in Missouri, 2021Tornado Warnings in Illinois, 2021Every tornado warning in 2021Tornadoes in 2021

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.