Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 184, NWS St. Louis, MO

December 10, 2021Cole County, Osage County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Dec 10, 2021, 6:18 PM CST for Cole County, Osage County, Missouri. It was in force for 42 min. 11 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, 6:18 PM CST (00:18 UTC)
Expired
Dec 10, 2021, 7:00 PM CST
In force
42 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

Counties Cole County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 129 km from the middle of the area, began a volume at 00:20 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, 6:23 PM CSTTSTM WND DMGSaint Thomas, MOCORRECTS PREVIOUS TSTM WND DMG REPORT FROM SAINT THOMAS. DELAYED REPORT, TIME ESTIMATED FROM RADAR. METAL PANEL ROOF LIFTED OFF A MOSTLY METAL SIDED BUILDING.
Dec 10, 6:26 PM CSTTSTM WND DMG1 W Westphalia, MOOSAGE COUNTY SHERIFFS OFFICE REPORTED A ROOF OFF A BUILDING AT COUNTY ROAD 503 AND HIGHWAY 133. TIME ESTIMATED FROM RADAR.
Dec 10, 6:27 PM CSTTSTM WND DMG1 Se Osage Bend, MOCORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 SE OSAGE BEND. CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 SE OSAGE BEND. DELAYED REPORT, TIME ESTIMATED FROM RADAR. LIMBS GREATER THAN 6 INCHES SNAPPED OFF TREE.
Dec 10, 6:27 PM CSTTSTM WND DMG1 Se Osage Bend, MOCORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 SE OSAGE BEND. DELAYED REPORT, TIME ESTIMATED FROM RADAR. TREE WITH SHALLOW ROOT BALL TIPPED OVER, EXPOSING ROOTS.
Dec 10, 6:27 PM CSTTSTM WND DMG1 Se Osage Bend, MODELAYED REPORT, NUMEROUS TREE LIMBS SIX INCHES AND LARGER SNAPPED. TIMING BASED OFF RADAR.
Dec 10, 6:28 PM CSTTSTM WND DMG2 W Westphalia, MOOSAGE COUNTY SHERIFFS OFFICE REPORTED NUMEROUS TREES DOWN ALONG HIGHWAY 133 INTO WESTPHALIA. TIME ESTIMATED FROM RADAR.
Dec 10, 6:30 PM CSTTSTM WND DMG2 N Westphalia, MOOSAGE COUNTY SHERIFFS OFFICE REPORTED A ROOF OFF A BUSINESS AT 674 HWY 63. TIME ESTIMATED FROM RADAR.
Dec 10, 6:31 PM CSTTSTM WND DMG3 N Westphalia, MOTREE DOWN BLOCKING BOTH LANES OF HIGHWAY 63 APPROX 1 MILE SOUTH OF HIGHWAY 50.
Dec 10, 6:34 PM CSTTSTM WND DMG2 Sse Loose Creek, MOOSAGE COUNTY SHERIFFS OFFICE REPORTED A TRAMPOLINE WAS BLOWN INTO THE SIDE OF A HOUSE. TIME ESTIMATED FROM RADAR.
Dec 10, 6:35 PM CSTTSTM WND DMG1 Ese Loose Creek, MOOSAGE COUNTY SHERIFFS OFFICE REPORTED HOME DAMAGE ALONG LOOSE CREEK HIGHWAY. TIME ESTIMATED FROM RADAR.
Dec 10, 6:58 PM CSTTSTM WND DMG6 W Bland, MOSTRONG WINDS HAVE BROUGHT DOWN TREE BRANCHES.

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

Springfield, MO (KSGF), launched 00:00Z, 0.3 hours before the alert went out and 225 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°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.

656 
WUUS53 KLSX 110018
SVRLSX
MOC051-151-110100-
/O.NEW.KLSX.SV.W.0184.211211T0018Z-211211T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
618 PM CST Fri Dec 10 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Cole County in central Missouri...
  Osage County in central Missouri...

* Until 700 PM CST.

* At 618 PM CST, a severe thunderstorm was located over St. Thomas,
  moving northeast at 55 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Wardsville around 625 PM CST.
  Taos and Westphalia around 635 PM CST.

Other locations in the path of this severe thunderstorm include Rich
Fountain and Linn.

This also includes Clarks Hill/Norton Historic Site.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CST for central and
east central Missouri.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

A Tornado Watch remains in effect until 1100 PM CST for central and
east central Missouri.

&&

LAT...LON 3852 9234 3856 9212 3856 9205 3860 9194
      3866 9164 3829 9165 3829 9219 3834 9220
      3832 9226 3834 9229 3834 9234 3835 9236
TIME...MOT...LOC 0018Z 245DEG 48KT 3834 9223 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Britt

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, 6:27 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, 8:06 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

Severe Thunderstorm Warnings in Missouri, 2021Every severe thunderstorm warning 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.