Alert archive / Missouri / Tornado Warnings in 2021

Tornado Warning 44, NWS St. Louis, MO

December 10, 2021Crawford County, Franklin County, Gasconade County, Missouri

NWS St. Louis, MO issued this tornado warning at Dec 10, 2021, 7:02 PM CST for Crawford County, Franklin County, Gasconade County, Missouri. It was in force for 43 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, 7:02 PM CST (01:02 UTC)
Expired
Dec 10, 2021, 7:45 PM CST
In force
43 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Crawford County, MO, Franklin County, MO, Gasconade County, MO

The radar

The St Louis radar (KLSX), 85 km from the middle of the area, began a volume at 01:03 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, 7:22 PM CSTTSTM WND DMG4 Sw Noser Mill, MOLARGE TREE DOWN AT EVERGREEN LOOP AND 3 OAKS ROAD, SOUTH OF LESLIE. TIME ESTIMATED FROM RADAR.
Dec 10, 7:29 PM CSTHAIL 0.253 W Union, MOREPORT OF PEA SIZED HAIL JUST WEST OF UNION.
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.

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

Springfield, MO (KSGF), launched 00:00Z, 1.0 hours before the alert went out and 254 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, Springfield, MO at 00:00Z on 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 637 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 344 square meters per square second.1939587897117136Sfc1 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
637 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
1113 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
344 m²/s²
0-3 km storm-relative helicity
300 m²/s²
Significant tornado parameter
1.2
Supercell composite
8.4

Open this sounding in Storm Lab

The text

As transmitted.

020 
WFUS53 KLSX 110102
TORLSX
MOC055-071-073-110145-
/O.NEW.KLSX.TO.W.0044.211211T0102Z-211211T0145Z/

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

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northwestern Crawford County in east central Missouri...
  Southwestern Franklin County in east central Missouri...
  Southern Gasconade County in east central Missouri...

* Until 745 PM CST.
    
* At 702 PM CST, a severe thunderstorm capable of producing a tornado
  was located 8 miles south of Bland, moving northeast 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...
  Oak Grove, Sullivan, Union, St. Clair and Parkway.

This includes Interstate 44 in Missouri between exits 225 and 242.
 
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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3825 9164 3849 9097 3830 9087 3808 9152
      3815 9153 3815 9164 3821 9165 3824 9165
TIME...MOT...LOC 0102Z 246DEG 50KT 3818 9161 

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

$$

19
1 follow-up statement
735 
WWUS53 KLSX 110122
SVSLSX

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

MOC055-073-110132-
/O.CAN.KLSX.TO.W.0044.000000T0000Z-211211T0145Z/
Crawford MO-Gasconade MO-
722 PM CST Fri Dec 10 2021

...THE TORNADO WARNING FOR NORTHWESTERN CRAWFORD AND SOUTHERN
GASCONADE 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 east central Missouri.

LAT...LON 3835 9136 3849 9097 3830 9087 3830 9088
      3820 9115 3820 9137
TIME...MOT...LOC 0122Z 246DEG 52KT 3829 9127 

$$

MOC071-110145-
/O.CON.KLSX.TO.W.0044.000000T0000Z-211211T0145Z/
Franklin MO-
722 PM CST Fri Dec 10 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CST FOR
SOUTHWESTERN FRANKLIN COUNTY...
    
At 722 PM CST, a severe thunderstorm capable of producing a tornado
was located 7 miles northwest of Sullivan, moving northeast at 60
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...
Union, Sullivan, St. Clair, Parkway, Miramiguoa Park, Noser Mill,
Japan, Stanton and Piney Park.

This includes Interstate 44 in Missouri between exits 225 and 242.
 
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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3835 9136 3849 9097 3830 9087 3830 9088
      3820 9115 3820 9137
TIME...MOT...LOC 0122Z 246DEG 52KT 3829 9127 

TORNADO...RADAR INDICATED
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, 7:11 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, 8:06 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

Nearby

Tornado Warnings in Missouri, 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.