Alert archive / Missouri / Tornado Warnings in 2021

Tornado Warning 58, NWS St. Louis, MO

December 10, 2021Iron County, Madison County, Reynolds County, Missouri

NWS St. Louis, MO issued this tornado warning at Dec 10, 2021, 10:14 PM CST for Iron County, Madison County, Reynolds County, Missouri. It was in force for 46 min. 1 report 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, 10:14 PM CST (04:14 UTC)
Expired: Dec 10, 2021, 11:00 PM CST
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Iron County, MO, Madison County, MO, Reynolds County, MO

The radar

The St Louis radar (KLSX), 152 km from the middle of the area, began a volume at 04:16 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
Dec 10, 10:38 PM CST	TSTM WND DMG	8 Ssw Fredericktown, MO	TREE DOWNED ON 6000 BLOCK OF HWY C.

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
Dec 10, 3:07 PM CST	Tornado Watch	SPC	11 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 4.2 hours before the alert went out and 285 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: 1725 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 398 m²/s²
0-3 km storm-relative helicity: 420 m²/s²
Significant tornado parameter: 4.8
Supercell composite: 16.2

Open this sounding in Storm Lab

The text

As transmitted.

681 
WFUS53 KLSX 110414
TORLSX
MOC093-123-179-110500-
/O.NEW.KLSX.TO.W.0058.211211T0414Z-211211T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
1014 PM CST Fri Dec 10 2021

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Southeastern Iron County in southeastern Missouri...
  East central Reynolds County in southeastern Missouri...
  Madison County in southeastern Missouri...

* Until 1100 PM CST.
    
* At 1014 PM CST, a severe thunderstorm capable of producing a
  tornado was located over Annapolis, 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...
  Saco, Buckhorn and Marquand.

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 3740 9086 3757 9014 3731 9015 3732 9055
      3727 9055 3727 9074 3724 9074 3724 9080
TIME...MOT...LOC 0414Z 257DEG 41KT 3733 9074 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Britt

3 follow-up statements

393 
WWUS53 KLSX 110428
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1028 PM CST Fri Dec 10 2021

MOC179-110438-
/O.CAN.KLSX.TO.W.0058.000000T0000Z-211211T0500Z/
Reynolds MO-
1028 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR EAST CENTRAL REYNOLDS COUNTY 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 southeastern
Missouri.

LAT...LON 3757 9014 3731 9015 3732 9055 3732 9060
      3734 9063 3737 9067 3744 9067
TIME...MOT...LOC 0428Z 254DEG 45KT 3739 9050 

$$

MOC093-123-110500-
/O.CON.KLSX.TO.W.0058.000000T0000Z-211211T0500Z/
Iron MO-Madison MO-
1028 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CST FOR
SOUTHEASTERN IRON AND MADISON COUNTIES IN SOUTHEASTERN MISSOURI...
    
At 1028 PM CST, a severe thunderstorm capable of producing a tornado
was located near Saco, moving east at 50 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...
Marquand, Buckhorn and Saco. 

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 3757 9014 3731 9015 3732 9055 3732 9060
      3734 9063 3737 9067 3744 9067
TIME...MOT...LOC 0428Z 254DEG 45KT 3739 9050 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Britt

227 
WWUS53 KLSX 110443
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1043 PM CST Fri Dec 10 2021

MOC093-110452-
/O.CAN.KLSX.TO.W.0058.000000T0000Z-211211T0500Z/
Iron MO-
1043 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR SOUTHEASTERN IRON COUNTY 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 southeastern
Missouri.

LAT...LON 3757 9014 3731 9015 3732 9055 3749 9046
TIME...MOT...LOC 0442Z 250DEG 49KT 3745 9029 

$$

MOC123-110500-
/O.CON.KLSX.TO.W.0058.000000T0000Z-211211T0500Z/
Madison MO-
1043 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CST FOR SOUTHERN
MADISON COUNTY IN SOUTHEASTERN MISSOURI...
    
At 1042 PM CST, a severe thunderstorm capable of producing a tornado
was located near Cobalt, moving east at 55 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...
Marquand, Buckhorn and Saco. 

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 3757 9014 3731 9015 3732 9055 3749 9046
TIME...MOT...LOC 0442Z 250DEG 49KT 3745 9029 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Britt

394 
WWUS53 KLSX 110457
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1057 PM CST Fri Dec 10 2021

MOC123-110506-
/O.EXP.KLSX.TO.W.0058.000000T0000Z-211211T0500Z/
Madison MO-
1057 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR SOUTHERN MADISON COUNTY IN SOUTHEASTERN
MISSOURI WILL EXPIRE AT 1100 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 200 AM CST for southeastern
Missouri.

Remember, a Severe Thunderstorm Warning still remains in effect for
southern Madison County until 1130 PM CST.

LAT...LON 3757 9014 3731 9015 3732 9055 3749 9046
TIME...MOT...LOC 0456Z 257DEG 41KT 3748 9010 

$$

Britt

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 10, 6:13 PM CST	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	47 min
Dec 10, 6:18 PM CST	Severe Thunderstorm Warning	LSX	Cole, Osage	42 min
Dec 10, 6:27 PM CST	Tornado Warning	LSX	Audrain, Callaway	34 min
Dec 10, 6:30 PM CST	Tornado Warning	LSX	Callaway, Cole, Gasconade, Montgomery, Osage	45 min
Dec 10, 6:42 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	48 min
Dec 10, 6:42 PM CST	Tornado Warning	LSX	Pike	48 min
Dec 10, 6:49 PM CST	Tornado Warning	LSX	Franklin, Gasconade, Osage, Warren	41 min
Dec 10, 6:50 PM CST	Tornado Warning	LSX	Audrain, Callaway, Montgomery, Pike, Ralls	40 min
Dec 10, 7:00 PM CST	Tornado Warning	LSX	Gasconade, Lincoln, Montgomery, Pike, Warren	45 min
Dec 10, 7:02 PM CST	Tornado Warning	LSX	Crawford, Franklin, Gasconade	43 min
Dec 10, 7:11 PM CST	Tornado Warning	LSX	Lincoln, Montgomery, Pike	49 min
Dec 10, 7:16 PM CST	Tornado Warning	LSX	Franklin, Lincoln, Saint Charles, Warren	44 min
Dec 10, 7:30 PM CST	Tornado Warning	LSX	Lincoln	45 min
Dec 10, 7:35 PM CST	Tornado Warning Tornado observed	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren	40 min
Dec 10, 7:49 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Washington	26 min
Dec 10, 8:06 PM CST	Tornado Warning Tornado observed	LSX	Saint Charles, Saint Louis, City of Saint Louis	39 min
Dec 10, 8:10 PM CST	Severe Thunderstorm Warning	LSX	Franklin	35 min
Dec 10, 8:29 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis, City of Saint Louis	30 min
Dec 10, 8:34 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Osage	41 min
Dec 10, 8:47 PM CST	Tornado Warning	LSX	Franklin, Gasconade, Warren	43 min
Dec 10, 9:07 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more	38 min
Dec 10, 9:39 PM CST	Tornado Warning	LSX	Saint Charles, Saint Louis	51 min
Dec 10, 10:00 PM CST	Severe Thunderstorm Warning	LSX	Iron, Reynolds	45 min
Dec 10, 10:05 PM CST	Severe Thunderstorm Warning	LSX	City of Saint Louis	25 min
Dec 10, 10:19 PM CST	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	41 min
Dec 10, 10:26 PM CST	Severe Thunderstorm Warning	LSX	Reynolds	20 min
Dec 10, 10:55 PM CST	Severe Thunderstorm Warning	LSX	Madison	18 min

Nearby

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