Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 54, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Dec 10, 2021, 8:44 PM CST for 4 counties in Illinois. It was in force for 46 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 10, 2021, 8:44 PM CST (02:44 UTC)
- Expired
- Dec 10, 2021, 9:30 PM CST
- In force
- 46 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 1.0 in
Counties Fayette County, IL, Macoupin County, IL, Madison County, IL, Montgomery County, IL
The radar
The St Louis radar (KLSX), 112 km from the middle of the area, began a volume at 02:44 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 10, 5:17 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.7 hours before the alert went out and 139 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.
104
WFUS53 KLSX 110244
TORLSX
ILC051-117-119-135-110330-
/O.NEW.KLSX.TO.W.0054.211211T0244Z-211211T0330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
844 PM CST Fri Dec 10 2021
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Northern Madison County in southwestern Illinois...
Northwestern Fayette County in south central Illinois...
Southeastern Macoupin County in southwestern Illinois...
Montgomery County in south central Illinois...
* Until 930 PM CST.
* At 844 PM CST, a tornado producing storm was located over Benld,
moving northeast at 55 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Radar confirmed tornado.
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 tornadic storm will be near...
Litchfield around 855 PM CST.
Hillsboro and Taylor Springs around 900 PM CST.
Other locations in the path of this tornadic thunderstorm include
Schram City, Witt and Nokomis.
This also includes Lake Lou Yaeger.
This includes Interstate 55 in Illinois between exits 37 and 52.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. 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 3903 8956 3903 8959 3900 8959 3900 8964
3899 8964 3894 8977 3913 8987 3935 8942
3935 8914 3922 8914 3921 8911
TIME...MOT...LOC 0244Z 238DEG 49KT 3909 8978
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
192 follow-up statements
090
WWUS53 KLSX 110304
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
904 PM CST Fri Dec 10 2021
ILC117-119-110313-
/O.CAN.KLSX.TO.W.0054.000000T0000Z-211211T0330Z/
Madison IL-Macoupin IL-
904 PM CST Fri Dec 10 2021
...THE TORNADO WARNING FOR NORTHERN MADISON AND SOUTHEASTERN MACOUPIN
COUNTIES IN SOUTHWESTERN ILLINOIS IS CANCELLED...
The tornadic thunderstorm which prompted the warning has weakened
moved out of the warned area. Therefore, the warning has been
cancelled.
A Tornado Watch remains in effect until 1100 PM CST for south central
Illinois.
LAT...LON 3903 8956 3903 8959 3900 8959 3900 8966
3901 8969 3904 8969 3933 8914 3922 8914
3921 8911
TIME...MOT...LOC 0303Z 249DEG 49KT 3905 8943
$$
ILC051-135-110330-
/O.CON.KLSX.TO.W.0054.000000T0000Z-211211T0330Z/
Fayette IL-Montgomery IL-
904 PM CST Fri Dec 10 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CST FOR
NORTHWESTERN FAYETTE AND SOUTHERN MONTGOMERY COUNTIES...
At 903 PM CST, a severe thunderstorm capable of producing a tornado
was located near Coffeen, moving east at 55 mph.
HAZARD...Tornado and quarter size hail.
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 tornadic thunderstorm will remain over mainly rural areas of
northwestern Fayette and southern Montgomery Counties, including the
following locations... Walshville.
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 3903 8956 3903 8959 3900 8959 3900 8966
3901 8969 3904 8969 3933 8914 3922 8914
3921 8911
TIME...MOT...LOC 0303Z 249DEG 49KT 3905 8943
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
19043
WWUS53 KLSX 110328
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
928 PM CST Fri Dec 10 2021
ILC051-135-110338-
/O.EXP.KLSX.TO.W.0054.000000T0000Z-211211T0330Z/
Fayette IL-Montgomery IL-
928 PM CST Fri Dec 10 2021
...THE TORNADO WARNING FOR NORTHWESTERN FAYETTE AND SOUTHERN
MONTGOMERY COUNTIES WILL EXPIRE AT 930 PM CST...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 1100 PM CST for south central
Illinois.
LAT...LON 3903 8956 3903 8959 3900 8959 3900 8966
3901 8969 3904 8969 3933 8914 3922 8914
3921 8911
TIME...MOT...LOC 0328Z 238DEG 49KT 3922 8908
$$
19The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 10, 6:42 PM CST | Tornado Warning | LSX | Pike | 48 min |
| Dec 10, 7:11 PM CST | Tornado Warning | LSX | Pike | 49 min |
| Dec 10, 7:16 PM CST | Tornado Warning | LSX | Pike | 14 min |
| Dec 10, 7:30 PM CST | Tornado Warning | LSX | Calhoun, Greene, Jersey | 45 min |
| Dec 10, 7:35 PM CST | Tornado Warning | LSX | Calhoun, Jersey | 40 min |
| Dec 10, 7:36 PM CST | Tornado Warning | LSX | Pike | 21 min |
| Dec 10, 8:06 PM CST | Tornado Warning | LSX | Jersey, Macoupin, Madison | 39 min |
| Dec 10, 8:33 PM CST | Tornado Warning | LSX | Bond, Madison | 42 min |
| Dec 10, 8:37 PM CST | Tornado Warning | LSX | Macoupin, Madison | 17 min |
| Dec 10, 8:56 PM CST | Tornado Warning | LSX | Bond, Fayette, Montgomery | 34 min |
| Dec 10, 9:07 PM CST | Severe Thunderstorm Warning | LSX | Calhoun | 38 min |
| Dec 10, 9:39 PM CST | Tornado Warning | LSX | Macoupin, Madison | 51 min |
| Dec 10, 10:05 PM CST | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 25 min |
| Dec 10, 10:18 PM CST | Severe Thunderstorm Warning | LSX | Bond, Fayette, Macoupin, Madison, Montgomery | 57 min |
| Dec 10, 10:19 PM CST | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 41 min |
| Dec 10, 10:26 PM CST | Tornado Warning | LSX | Bond, Fayette, Montgomery | 49 min |
| Dec 10, 10:51 PM CST | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 39 min |
| Dec 10, 11:02 PM CST | Tornado Warning | LSX | Fayette | 29 min |
| Dec 10, 11:10 PM CST | Tornado Warning | LSX | Clinton, Marion, Washington | 50 min |
Nearby
Tornado Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.