Alert archive / Missouri / Tornado Warnings in 2021

Tornado Warning 49, NWS St. Louis, MO

December 10, 20216 counties in Missouri; Calhoun County, Jersey County, Illinois

NWS St. Louis, MO issued this tornado warning at Dec 10, 2021, 7:35 PM CST for 6 counties in Missouri; Calhoun County, Jersey County, Illinois. It was in force for 40 min. 20 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, 7:35 PM CST (01:35 UTC)
Expired
Dec 10, 2021, 8:15 PM CST
In force
40 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Observed
Hail
0.75 in

Counties Calhoun County, IL, Jersey County, IL, Franklin County, MO, Jefferson County, MO, Lincoln County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 5 km from the middle of the area, began a volume at 01:35 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, 7:35 PM CSTTSTM WND DMG3 Nnw Moselle, MONUMEROUS DAMAGED TREES, INCLUDING ONE LARGE TREE THAT WAS UPROOTED, DAMAGE TO A CARPORT, SOME ROOF DAMAGE. PHOTOS PROVIDED FOR CARPORT, TREE DAMAGE.
Dec 10, 7:36 PM CSTTSTM WND DMG4 Nne Stanton, MOFRANKLIN COUNTY DISPATCH REPORTED A LARGE TREE BLOCKING THE ROADWAY ALONG ST. LOUIS INN ROAD WSW OF ST. CLAIR. TIME ESTIMATED FROM RADAR.
Dec 10, 7:38 PM CSTTSTM WND DMG1 Sw Union, MOFRANKLIN COUNTY DISPATCH REPORTED POWER LINES DOWN AT KOELLING AVENUE AND WEST SPRINGFIELD AVENUE IN SW UNION. TIME ESTIMATED FROM RADAR.
Dec 10, 7:38 PM CSTTSTM WND DMG3 N Saint Clair, MOFRANKLIN COUNTY DISPATCH REPORTED A TREE DOWN ON HWY 47 AT EASTVIEW DRIVE SOUTH OF UNION. TIME ESTIMATED FROM RADAR.
Dec 10, 7:40 PM CSTTSTM WND DMG1 Nw Defiance, MOBUILDING COLLAPSE AS WELL AS REPORTS OF MULTIPLE HOMES DAMAGED AND DEBRIS IN THE AREA.
Dec 10, 7:40 PM CSTTORNADO1 Nw Defiance, MOCORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 NW DEFIANCE. BUILDING COLLAPSE AS WELL AS REPORTS OF MULTIPLE HOMES DAMAGED AND DEBRIS IN THE AREA.
Dec 10, 7:40 PM CSTTORNADO2 W Defiance, MOSIGNIFICANT DAMAGE TO HOME AT HIGHWAY F AND STUB ROAD.
Dec 10, 7:44 PM CSTTSTM WND DMG3 Nnw Moselle, MOFRANKLIN COUNTY DISPATCH REPORTED POWER LINES DOWN AT DENMARK ROAD AT FAIRWAY DRIVE. TIME ESTIMATED FROM RADAR.
Dec 10, 7:45 PM CSTTORNADO1 Nne Defiance, MO*** 1 FATAL, 2 INJ *** SIGNIFICANT STRUCTURE DAMAGE IN DEFIANCE. ONE CONFIRMED FATALITY AND 2 INJURIES.
Dec 10, 7:47 PM CSTTSTM WND DMG2 Nw Pacific, MOFRANKLIN COUNTY DISPATCH REPORTED A TREE DOWN ON THORNTON ROAD AT SKYLINE DRIVE. TIME ESTIMATED FROM RADAR.
Dec 10, 7:50 PM CSTTSTM WND DMG2 Ssw Weldon Spring, MOREPORT OF APPROXIMATELY 20 VEHICLES WITH DEBRIS DAMAGE ON EASTBOUND 64 EAST OF BOONE BRIDGE.
Dec 10, 7:50 PM CSTTORNADO2 Ssw Weldon Spring, MOCORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 SSW WELDON SPRING. REPORT OF APPROXIMATELY 20 VEHICLES WITH DEBRIS DAMAGE ON EASTBOUND 64 EAST OF BOONE BRIDGE.
Dec 10, 7:53 PM CSTTSTM WND DMG1 Ese Gray Summit, MOFRANKLIN COUNTY DISPATCH REPORTED A TREE OVER HOGAN ROAD IN PACIFIC. TIME ESTIMATED FROM RADAR.
Dec 10, 7:55 PM CSTNON-TSTM WND GST 452 E Chesterfield, MOWINDS REPORTED AT 45 MPH IN CHESTERFIELD.
Dec 10, 7:56 PM CSTTSTM WND GST 704 W Chesterfield, MOST. LOUIS/SPIRIT,MO (SUS) ASOS REPORTS GUST OF 61.0 KNOTS FROM SW @ 0156Z KSUS 110156Z 22028G61KT 1/2SM R08R/2800VP6000FT +RA FG SQ SCT026 BKN070 OVC100 17/16 A2947 RMK AO2 PK WND 22048/0155 LTG DSNT ALQDS PRESRR P0009 T01670156.
Dec 10, 8:00 PM CSTHAIL 11 E Ballwin, MOQUARTER SIZED HAIL REPORTED IN BALLWIN.
Dec 10, 8:02 PM CSTTSTM WND GST 683 E Kampville, MOST. CHARLES,MO (SET) ASOS REPORTS GUST OF 59.0 KNOTS FROM W @ 0202Z KSET 110205Z AUTO 28026G59KT 3/4SM +TSRA BR BKN029 BKN070 OVC090 17/15 A2945 RMK AO2 PK WND 28059/0202 WSHFT 0151 LTG DSNT ALQDS P0025 T01720150.
Dec 10, 8:04 PM CSTTSTM WND DMG1 Nw Creve Coeur, MOLARGE TREE UPROOTED, FELL ON TO APARTMENT BUILDING.
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, 8:20 PM CSTTSTM WND DMG3 Ssw Weldon Spring, MOFENCE BLOWN DOWN NEAR CHESTERFIELD MALL.

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, 3:07 PM CSTTornado WatchSPC11 hr
Dec 10, 5:17 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.6 hours before the alert went out and 236 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.

040 
WFUS53 KLSX 110135
TORLSX
ILC013-083-MOC071-099-113-183-189-219-110215-
/O.NEW.KLSX.TO.W.0049.211211T0135Z-211211T0215Z/

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

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Calhoun County in southwestern Illinois...
  Southwestern Jersey County in southwestern Illinois...
  St. Charles County in east central Missouri...
  Northwestern Jefferson County in east central Missouri...
  Southeastern Lincoln County in east central Missouri...
  Eastern Franklin County in east central Missouri...
  St. Louis County in east central Missouri...
  Southeastern Warren County in east central Missouri...

* Until 815 PM CST.
    
* At 734 PM CST, a tornado producing storm was located over Augusta,
  moving east at 50 mph.

  HAZARD...Damaging tornado.

  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...
  Defiance around 745 PM CST.
  Wildwood, Spirit of St. Louis Airport and Weldon Spring Heights 
  around 750 PM CST.

Other locations in the path of this tornadic thunderstorm include St.
Peters, Ballwin, Ellisville, Weldon Spring, Cottleville, Clarkson
Valley, Winchester, Chesterfield, Manchester, Town and Country,
Harvester, Kirkwood, Maryland Heights, Ladue, Des Peres, Frontenac,
Warson Woods, Crystal Lake Park, Huntleigh, Westwood, Country Life
Acres, University City, Creve Coeur, Overland, Clayton, St. Ann,
Bridgeton, Richmond Heights, Brentwood, Maplewood, Olivette,
Florissant, Hazelwood, Berkeley, Bel-Ridge, Kinloch, Pagedale and
Bel-Nor.

This also includes Babler Memorial State Park, Route 66 State Park,
Castlewood State Park, First Missouri State Capitol Historic Site,
Robertsville State Park, and Pere Marquette State Park.
 
This includes the following highways...
 Interstate 44 in Missouri between exits 239 and 277.
 Interstate 70 in Missouri between exits 200 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 3855 9033 3828 9115 3884 9102 3901 9069
      3913 9030
TIME...MOT...LOC 0134Z 252DEG 43KT 3860 9090 

TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN

$$

19
1 follow-up statement
449 
WWUS53 KLSX 110201
SVSLSX

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

MOC071-099-113-219-110210-
/O.CAN.KLSX.TO.W.0049.000000T0000Z-211211T0215Z/
Jefferson MO-Lincoln MO-Franklin MO-Warren MO-
801 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR NORTHWESTERN JEFFERSON...SOUTHEASTERN
LINCOLN...EASTERN FRANKLIN AND SOUTHEASTERN WARREN COUNTIES IS
CANCELLED...
    
The tornadic 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 CST for east central
Missouri. A Tornado Watch also remains in effect until 1100 PM CST
for southwestern Illinois...and east central Missouri.

LAT...LON 3855 9033 3848 9074 3892 9071 3892 9069
      3893 9070 3894 9066 3901 9069 3913 9030
TIME...MOT...LOC 0200Z 243DEG 53KT 3874 9050 

$$

ILC013-083-MOC183-189-110215-
/O.CON.KLSX.TO.W.0049.000000T0000Z-211211T0215Z/
Calhoun IL-Jersey IL-St. Charles MO-St. Louis MO-
801 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CST FOR
SOUTHEASTERN CALHOUN...SOUTHWESTERN JERSEY...NORTH CENTRAL ST.
CHARLES AND ST. LOUIS COUNTIES...
        
At 800 PM CST, a confirmed tornado was located over Maryland Heights,
moving northeast at 60 mph.

HAZARD...Damaging tornado.

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.

Locations impacted include...
  University City, Overland, St. Ann, Bridgeton, Olivette, St. John, 
  Lambert-St. Louis International Airport, Breckenridge Hills, 
  Hanley Hills, Vinita Park, Florissant, Hazelwood, Berkeley, 
  Woodson Terrace, Bel-Ridge, Kinloch and Bel-Nor.

This also includes Babler Memorial State Park, Route 66 State Park,
Castlewood State Park, First Missouri State Capitol Historic Site,
and Pere Marquette State Park.
 
This includes the following highways...
 Interstate 44 in Missouri between exits 261 and 265, and between
exits 269 and 277.
 Interstate 70 in Missouri between exits 217 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 3855 9033 3848 9074 3892 9071 3892 9069
      3893 9070 3894 9066 3901 9069 3913 9030
TIME...MOT...LOC 0200Z 243DEG 53KT 3874 9050 

TORNADO...OBSERVED
MAX HAIL SIZE...<.75 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, 7:49 PM CSTSevere Thunderstorm WarningLSXCrawford, Washington26 min
Dec 10, 8:06 PM CSTTornado Warning Tornado observedLSXSaint Charles, Saint Louis, City of Saint Louis39 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.