Alert archive / Missouri / Tornado Warnings in 2021
Tornado Warning 42, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Dec 10, 2021, 6:50 PM CST for 5 counties in Missouri. It was in force for 40 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, 6:50 PM CST (00:50 UTC)
- Expired
- Dec 10, 2021, 7:30 PM CST
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Audrain County, MO, Callaway County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO
The radar
The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 00:52 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, 6:59 PM CST | TORNADO | 2 Ne Wellsville, MO | NWS STORM SURVEY FOUND EF0 DAMAGE TO TREES AND CORN CROPS NORTHEAST OF WELLSVILLE, MO. |
| Dec 10, 7:02 PM CST | TORNADO | 5 Ne Wellsville, MO | CORRECTS PREVIOUS TORNADO REPORT FROM 5 NE WELLSVILLE. TDS EVIDENT FROM KLSX. |
| Dec 10, 7:06 PM CST | TSTM WND DMG | 1 Sw Middletown, MO | UNKNOWN STRUCTURAL DAMAGE NEAR MIDDLETOWN RELAYED TO OUR OFFICE WITH PUBLIC REPORTS OF A FUNNEL CLOUD NEAR HIGHWAY 161 AND ROUTE A. |
| Dec 10, 7:10 PM CST | HAIL 0.88 | Martinsburg, MO | PENNY TO NICKEL SIZED HAIL AND DOWNED POWER LINES REPORTED IN THE CITY OF MARTINSBURG. |
| Dec 10, 7:17 PM CST | HAIL 0.88 | Vandalia, MO | PENNY TO NICKEL SIZED HAIL AND DOWNED POWER LINES REPORTED IN THE CITY OF VANDALIA, MO. |
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, 5:17 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.8 hours before the alert went out and 282 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.
- 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
The text
As transmitted.
482
WFUS53 KLSX 110050
TORLSX
MOC007-027-139-163-173-110130-
/O.NEW.KLSX.TO.W.0042.211211T0050Z-211211T0130Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
650 PM CST Fri Dec 10 2021
The National Weather Service in St Louis has issued a
* Tornado Warning for...
South central Ralls County in northeastern Missouri...
Eastern Audrain County in central Missouri...
Northern Montgomery County in east central Missouri...
Northeastern Callaway County in central Missouri...
Western Pike County in northeastern Missouri...
* Until 730 PM CST.
* At 650 PM CST, a severe thunderstorm capable of producing a tornado
was located over Martinsburg, 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.
* This dangerous storm will be near...
Farber around 700 PM CST.
Vandalia around 705 PM CST.
New Hartford around 710 PM CST.
Other locations in the path of this tornadic thunderstorm include
Curryville.
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 3890 9180 3917 9181 3952 9131 3905 9126
TIME...MOT...LOC 0050Z 241DEG 48KT 3914 9167
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Britt2 follow-up statements
045
WWUS53 KLSX 110107
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
707 PM CST Fri Dec 10 2021
MOC027-110115-
/O.CAN.KLSX.TO.W.0042.000000T0000Z-211211T0130Z/
Callaway MO-
707 PM CST Fri Dec 10 2021
...THE TORNADO WARNING FOR NORTHEASTERN CALLAWAY COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM CST for central,
northeastern and east central Missouri.
LAT...LON 3896 9158 3934 9157 3952 9131 3905 9126
TIME...MOT...LOC 0105Z 240DEG 55KT 3923 9149 3914 9142 3906 9149
$$
MOC007-139-163-173-110130-
/O.CON.KLSX.TO.W.0042.000000T0000Z-211211T0130Z/
Ralls MO-Audrain MO-Montgomery MO-Pike MO-
707 PM CST Fri Dec 10 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CST FOR SOUTH
CENTRAL RALLS COUNTY IN NORTHEASTERN MISSOURI...NORTHEASTERN AUDRAIN
COUNTY IN CENTRAL MISSOURI...NORTHERN MONTGOMERY COUNTY IN EAST
CENTRAL MISSOURI AND WESTERN PIKE COUNTIES IN NORTHEASTERN
MISSOURI...
At 705 PM CST, severe thunderstorms capable of producing tornadoes
were located along a line extending from near Vandalia to 8 miles
southwest of New Hartford to near Buell, moving northeast at 65 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...
Curryville and New Hartford.
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 3896 9158 3934 9157 3952 9131 3905 9126
TIME...MOT...LOC 0105Z 240DEG 55KT 3923 9149 3914 9142 3906 9149
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Britt802 WWUS53 KLSX 110121 SVSLSX Severe Weather Statement National Weather Service St Louis MO 721 PM CST Fri Dec 10 2021 MOC007-139-163-173-110130- /O.EXP.KLSX.TO.W.0042.000000T0000Z-211211T0130Z/ Ralls MO-Audrain MO-Montgomery MO-Pike MO- 721 PM CST Fri Dec 10 2021 ...THE TORNADO WARNING FOR SOUTH CENTRAL RALLS COUNTY IN NORTHEASTERN MISSOURI...NORTHEASTERN AUDRAIN COUNTY IN CENTRAL MISSOURI...NORTHERN MONTGOMERY COUNTY IN EAST CENTRAL MISSOURI AND WESTERN PIKE COUNTIES IN NORTHEASTERN MISSOURI WILL EXPIRE AT 730 PM CST... The storms which prompted the warning have moved out of the warned area. Therefore, the warning will be allowed to expire. A Tornado Watch remains in effect until 1100 PM CST for central, northeastern and east central Missouri. LAT...LON 3896 9158 3934 9157 3952 9131 3905 9126 TIME...MOT...LOC 0120Z 241DEG 48KT 3932 9127 3923 9120 3916 9127 $$ 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, 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 | 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 | 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, 10:14 PM CST | Tornado Warning | LSX | Iron, Madison, Reynolds | 46 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, 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.