Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 202, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Dec 15, 2021, 9:48 PM CST for 6 counties in Missouri; 4 counties in Illinois. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Dec 15, 2021, 9:48 PM CST (03:48 UTC)
- Expired
- Dec 15, 2021, 10:30 PM CST
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Adams County, IL, Brown County, IL, Calhoun County, IL, Pike County, IL, Audrain County, MO, Callaway County, MO, Lincoln County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO
The radar
The St Louis radar (KLSX), 107 km from the middle of the area, began a volume at 03:51 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.
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 15, 6:00 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.8 hours before the alert went out and 197 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 559 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 427 m²/s²
- 0-3 km storm-relative helicity
- 474 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
311
WUUS53 KLSX 160348
SVRLSX
ILC001-009-013-149-MOC007-027-113-139-163-173-160430-
/O.NEW.KLSX.SV.W.0202.211216T0348Z-211216T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
948 PM CST Wed Dec 15 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Northwestern Calhoun County in southwestern Illinois...
Pike County in west central Illinois...
Southeastern Adams County in west central Illinois...
Brown County in west central Illinois...
Eastern Ralls County in northeastern Missouri...
Northwestern Lincoln County in east central Missouri...
Southeastern Audrain County in central Missouri...
Montgomery County in east central Missouri...
Northeastern Callaway County in central Missouri...
Pike County in northeastern Missouri...
* Until 1030 PM CST.
* At 948 PM CST, severe thunderstorms were located along a line
extending from near Quincy Regional Airport to near Williamsburg,
moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Montgomery City, New Florence and Buckhorn around 1005 PM CST.
Other locations in the path of these severe thunderstorms include
Mount Sterling, Buell, Bellflower and Davis.
This includes the following highways...
Interstate 72 between exits 10 and 35.
Interstate 70 in Missouri between exits 161 and 170.
This also includes Graham Cave State Park and Siloam Springs State
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4002 9063 4003 9061 4001 9062 4000 9060
3998 9060 3999 9051 3997 9051 3992 9054
3988 9058 3983 9057 3971 9065 3965 9062
3901 9104 3897 9119 3899 9119 3899 9126
3895 9127 3881 9181 3994 9111 4005 9068
TIME...MOT...LOC 0348Z 248DEG 44KT 3993 9111 3887 9175
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Elmore3 follow-up statements
056
WWUS53 KLSX 160405
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1005 PM CST Wed Dec 15 2021
MOC007-027-173-160414-
/O.CAN.KLSX.SV.W.0202.000000T0000Z-211216T0430Z/
Ralls MO-Audrain MO-Callaway MO-
1005 PM CST Wed Dec 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN RALLS...SOUTHEASTERN
AUDRAIN AND NORTHEASTERN CALLAWAY COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight CST for
southwestern and west central Illinois...and central, northeastern
and east central Missouri.
LAT...LON 4003 9061 3998 9060 3999 9052 3971 9065
3965 9062 3901 9104 3897 9119 3899 9119
3899 9126 3895 9127 3886 9164 3914 9146
3914 9141 3921 9142 3999 9091 4005 9068
TIME...MOT...LOC 0404Z 248DEG 46KT 4000 9081 3894 9152
$$
ILC001-009-013-149-MOC113-139-163-160430-
/O.CON.KLSX.SV.W.0202.000000T0000Z-211216T0430Z/
Calhoun IL-Pike IL-Adams IL-Brown IL-Lincoln MO-Montgomery MO-
Pike MO-
1005 PM CST Wed Dec 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CST
FOR NORTHWESTERN CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS...PIKE...
SOUTHEASTERN ADAMS AND BROWN COUNTIES IN WEST CENTRAL ILLINOIS...
NORTHWESTERN LINCOLN...NORTHERN MONTGOMERY COUNTIES IN EAST CENTRAL
MISSOURI AND PIKE COUNTIES IN NORTHEASTERN MISSOURI...
At 1004 PM CST, severe thunderstorms were located along a line
extending from near Mount Sterling to near Montgomery City, moving
east at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Mount Sterling and Davis.
This also includes Graham Cave State Park and Siloam Springs State
Park.
This includes the following highways...
Interstate 72 between exits 20 and 35.
Interstate 70 in Missouri near exit 170.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4003 9061 3998 9060 3999 9052 3971 9065
3965 9062 3901 9104 3897 9119 3899 9119
3899 9126 3895 9127 3886 9164 3914 9146
3914 9141 3921 9142 3999 9091 4005 9068
TIME...MOT...LOC 0404Z 248DEG 46KT 4000 9081 3894 9152
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Elmore838
WWUS53 KLSX 160416
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1016 PM CST Wed Dec 15 2021
ILC001-160425-
/O.CAN.KLSX.SV.W.0202.000000T0000Z-211216T0430Z/
Adams IL-
1016 PM CST Wed Dec 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ADAMS COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight CST for
southwestern and west central Illinois...and northeastern and east
central Missouri.
LAT...LON 4003 9061 3998 9060 3999 9052 3971 9065
3965 9062 3901 9104 3897 9119 3899 9119
3899 9126 3895 9127 3888 9155 3976 9096
3976 9092 3983 9091 4002 9078 4005 9068
TIME...MOT...LOC 0415Z 248DEG 44KT 4005 9065 3899 9136
$$
ILC009-013-149-MOC113-139-163-160430-
/O.CON.KLSX.SV.W.0202.000000T0000Z-211216T0430Z/
Calhoun IL-Pike IL-Brown IL-Lincoln MO-Montgomery MO-Pike MO-
1016 PM CST Wed Dec 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CST
FOR NORTHWESTERN CALHOUN COUNTY IN SOUTHWESTERN ILLINOIS...PIKE AND
BROWN COUNTIES IN WEST CENTRAL ILLINOIS...NORTHWESTERN LINCOLN...
NORTHEASTERN MONTGOMERY COUNTIES IN EAST CENTRAL MISSOURI AND PIKE
COUNTIES IN NORTHEASTERN MISSOURI...
At 1015 PM CST, severe thunderstorms were located along a line
extending from 6 miles southwest of Rushville to Bellflower, moving
east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Bowling Green, Pittsfield, Louisiana, Montgomery City, Mount
Sterling, Griggsville, Davis, Pleasant Hill, New Florence, Atlas,
Eolia, Clarksville, Bellflower, Pike, Buckhorn, Buell, New Hartford,
Tarrants, Independence and Versailles.
This includes Interstate 72 between exits 31 and 35.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4003 9061 3998 9060 3999 9052 3971 9065
3965 9062 3901 9104 3897 9119 3899 9119
3899 9126 3895 9127 3888 9155 3976 9096
3976 9092 3983 9091 4002 9078 4005 9068
TIME...MOT...LOC 0415Z 248DEG 44KT 4005 9065 3899 9136
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Elmore483
WWUS53 KLSX 160424
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1024 PM CST Wed Dec 15 2021
ILC009-013-149-MOC113-139-163-160433-
/O.EXP.KLSX.SV.W.0202.000000T0000Z-211216T0430Z/
Calhoun IL-Pike IL-Brown IL-Lincoln MO-Montgomery MO-Pike MO-
1024 PM CST Wed Dec 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CALHOUN COUNTY IN
SOUTHWESTERN ILLINOIS...PIKE AND BROWN COUNTIES IN WEST CENTRAL
ILLINOIS...NORTHWESTERN LINCOLN...NORTHEASTERN MONTGOMERY COUNTIES IN
EAST CENTRAL MISSOURI AND PIKE COUNTIES IN NORTHEASTERN MISSOURI WILL
EXPIRE AT 1030 PM CST...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until midnight CST for
southwestern and west central Illinois...and northeastern and east
central Missouri.
LAT...LON 4003 9061 3998 9060 3999 9052 3971 9065
3965 9062 3901 9104 3897 9119 3899 9119
3899 9126 3895 9127 3888 9155 3976 9096
3976 9092 3983 9091 4002 9078 4005 9068
TIME...MOT...LOC 0423Z 248DEG 44KT 4009 9053 3903 9124
$$
ElmoreThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 15, 8:01 PM CST | Severe Thunderstorm Warning | LSX | Knox, Lewis, Marion, Monroe, Ralls, Shelby | 44 min |
| Dec 15, 8:34 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Moniteau, Monroe, Ralls | 41 min |
| Dec 15, 9:09 PM CST | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Cole, Marion, Monroe and 3 more | 51 min |
| Dec 15, 9:22 PM CST | Severe Thunderstorm Warning | LSX | Marion | 53 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2021Severe Thunderstorm Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.