Alert archive / Illinois / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 192, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Dec 10, 2021, 10:05 PM CST for Madison County, Saint Clair County, Illinois; City of Saint Louis, Missouri. It was in force for 25 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, 10:05 PM CST (04:05 UTC)
- Expired
- Dec 10, 2021, 10:30 PM CST
- In force
- 25 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO
The radar
The St Louis radar (KLSX), 59 km from the middle of the area, began a volume at 04:06 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, 3:07 PM CST | Tornado Watch | SPC | 11 hr |
| Dec 10, 5:17 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 4.1 hours before the alert went out and 209 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.
608
WUUS53 KLSX 110405
SVRLSX
ILC119-163-MOC510-110430-
/O.NEW.KLSX.SV.W.0192.211211T0405Z-211211T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
1005 PM CST Fri Dec 10 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southern Madison County in southwestern Illinois...
Northern St. Clair County in southwestern Illinois...
Southeastern St. Louis City in east central Missouri...
* Until 1030 PM CST.
* At 1004 PM CST, severe thunderstorms were located along a line
extending from near Glen Carbon to East Carondelet, moving east at
50 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Edwardsville, Troy, Maryville and Pontoon Beach around 1010 PM
CST.
Glen Carbon around 1015 PM CST.
Fairview Heights, St. Jacob and Marine around 1020 PM CST.
Other locations in the path of these severe thunderstorms include
Belleville, Collinsville, Swansea, Shiloh, Caseyville, O'Fallon,
Highland and Lebanon.
This includes the following highways...
Interstate 70 in Illinois between exits 21 and 24.
Interstate 55 in Illinois near exit 23.
Interstate 64 in Illinois between exits 9 and 19.
This also includes Horseshoe Lake State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM CST for southwestern
Illinois. A Tornado Watch also remains in effect until 1100 PM CST
for southwestern Illinois...and east central Missouri.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1100 PM CST for southwestern
Illinois. A Tornado Watch also remains in effect until 1100 PM CST
for southwestern Illinois...and east central Missouri.
&&
LAT...LON 3857 8976 3852 9026 3853 9026 3853 9027
3875 9012 3886 8963
TIME...MOT...LOC 0404Z 253DEG 41KT 3878 9001 3854 9024
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
191 follow-up statement
791 WWUS53 KLSX 110422 SVSLSX Severe Weather Statement National Weather Service St Louis MO 1022 PM CST Fri Dec 10 2021 ILC163-MOC510-110431- /O.CAN.KLSX.SV.W.0192.000000T0000Z-211211T0430Z/ St. Clair IL-St. Louis City MO- 1022 PM CST Fri Dec 10 2021 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ST. CLAIR AND SOUTHEASTERN ST. LOUIS CITY IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. A Tornado Watch remains in effect until 1100 PM CST for southwestern Illinois. A Tornado Watch also remains in effect until 1100 PM CST for southwestern Illinois. LAT...LON 3865 8972 3866 9005 3878 8997 3886 8963 TIME...MOT...LOC 0421Z 253DEG 41KT 3883 8980 3859 9003 $$ ILC119-110430- /O.CON.KLSX.SV.W.0192.000000T0000Z-211211T0430Z/ Madison IL- 1022 PM CST Fri Dec 10 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CST FOR SOUTHEASTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS... At 1021 PM CST, severe thunderstorms were located along a line extending from near Marine to Fairview Heights, moving east at 45 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. These severe storms will be near... Marine around 1025 PM CST. Other locations in the path of these severe thunderstorms include Highland, Troy and St. Jacob. This includes the following highways... Interstate 70 in Illinois between exits 21 and 24. Interstate 55 in Illinois near exit 23. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 1100 PM CST for southwestern Illinois. A Tornado Watch also remains in effect until 1100 PM CST for southwestern Illinois. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3865 8972 3866 9005 3878 8997 3886 8963 TIME...MOT...LOC 0421Z 253DEG 41KT 3883 8980 3859 9003 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ BSH
The 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, 8:44 PM CST | Tornado Warning | LSX | Fayette, Macoupin, Madison, Montgomery | 46 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, 10:18 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 |
| 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, 6:49 PM CST | Tornado Warning | LSX | Franklin, Gasconade, Osage, Warren | 41 min |
| Dec 10, 6:50 PM CST | Tornado Warning | LSX | Audrain, Callaway, Montgomery, Pike, Ralls | 40 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, 7:16 PM CST | Tornado Warning | LSX | Franklin, Lincoln, Saint Charles, Warren | 44 min |
| Dec 10, 7:49 PM CST | Severe Thunderstorm Warning | LSX | Crawford, Washington | 26 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, 10:00 PM CST | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 45 min |
| Dec 10, 10:14 PM CST | Tornado Warning | LSX | Iron, Madison, Reynolds | 46 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
Severe Thunderstorm Warnings in Illinois, 2021Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.