Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 35, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Oct 24, 2021, 9:33 PM CDT for Saint Clair County, Illinois. It was in force for 30 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
- Oct 24, 2021, 9:33 PM CDT (02:33 UTC)
- Expired
- Oct 24, 2021, 10:03 PM CDT
- In force
- 30 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Saint Clair County, IL
The radar
The St Louis radar (KLSX), 65 km from the middle of the area, began a volume at 02:36 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 |
|---|---|---|---|
| Oct 24, 9:37 PM CDT | TSTM WND DMG | 1 Sse Swansea, IL | LARGE TREE LIMB DOWN ON A FENCE IN SWANSEA, IL. |
| Oct 24, 9:41 PM CDT | TSTM WND DMG | 1 Sse O'Fallon, IL | TREE BLOCKING DARTMOUTH DR AT WHITEHALL DR. |
| Oct 24, 9:44 PM CDT | TSTM WND DMG | 1 S Scott Afb, IL | FACEBOOK REPORT AND PHOTOGRAPHS SHOW ROOF OF STORAGE BUILDING AT AIR FORCE BASE STORAGE WAS BLOWN EAST ONTO ADJACENT HOUSE ALONG STATE ROUTE 161 E NEAR THE INTERSECTION OF HANNAH CHASE CT. |
| Oct 24, 9:44 PM CDT | TSTM WND GST 62 | 1 Se Scott Afb, IL | AWOS STATION KBLV SCOTT AIR FORCE BASE. |
| Oct 24, 9:50 PM CDT | TSTM WND DMG | 1 Wnw Swansea, IL | REPORTS OF 60 MPH WIND GUSTS, MEDIUM TREE BRANCHES DOWN, AND POWER OUTAGES NEAR JOYCE DRIVE. |
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 |
|---|---|---|---|
| Oct 24, 5:44 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.6 hours before the alert went out and 213 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
- 3 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 585 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 371 m²/s²
- 0-3 km storm-relative helicity
- 467 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted.
941
WFUS53 KLSX 250233
TORLSX
ILC163-250315-
/O.NEW.KLSX.TO.W.0035.211025T0233Z-211025T0315Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
933 PM CDT Sun Oct 24 2021
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Northern St. Clair County in southwestern Illinois...
* Until 1015 PM CDT.
* At 933 PM CDT, severe thunderstorms capable of producing both
tornadoes and extensive straight line wind damage were located near
Belleville, moving east at 50 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.
* These dangerous storms will be near...
Shiloh around 940 PM CDT.
O'Fallon and Mascoutah around 945 PM CDT.
Lebanon and Scott AFB around 950 PM CDT.
Other locations in the path of this tornadic thunderstorm include New
Baden.
This includes Interstate 64 in Illinois between exits 12 and 27.
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.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 3845 9014 3855 9018 3866 8991 3865 8971
3853 8971
TIME...MOT...LOC 0233Z 253DEG 45KT 3853 9006
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
CVKING3 follow-up statements
551
WWUS53 KLSX 250241
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
941 PM CDT Sun Oct 24 2021
ILC163-250315-
/O.CON.KLSX.TO.W.0035.000000T0000Z-211025T0315Z/
St. Clair IL-
941 PM CDT Sun Oct 24 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR
NORTHEASTERN ST. CLAIR COUNTY...
At 941 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located over
Shiloh, moving east at 50 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
These dangerous storms will be near...
Mascoutah and Scott AFB around 945 PM CDT.
Lebanon around 950 PM CDT.
Other locations in the path of this tornadic thunderstorm include New
Baden.
This includes Interstate 64 in Illinois between exits 12 and 27.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 3848 8998 3861 9004 3866 8991 3865 8971
3853 8971
TIME...MOT...LOC 0241Z 253DEG 45KT 3856 8993
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
CVKING782
WWUS53 KLSX 250249
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
949 PM CDT Sun Oct 24 2021
ILC163-250315-
/O.CON.KLSX.TO.W.0035.000000T0000Z-211025T0315Z/
St. Clair IL-
949 PM CDT Sun Oct 24 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR
NORTHEASTERN ST. CLAIR COUNTY...
At 949 PM CDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located over
Lebanon, moving east at 50 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 tornadic thunderstorm will remain over mainly rural areas of
northeastern St. Clair County, including the following locations...
Summerfield.
This includes Interstate 64 in Illinois between exits 23 and 27.
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.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 3851 8983 3866 8992 3866 8991 3865 8971
3853 8971
TIME...MOT...LOC 0249Z 253DEG 45KT 3859 8981
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
CVKING315
WWUS53 KLSX 250303
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
1003 PM CDT Sun Oct 24 2021
ILC163-250312-
/O.CAN.KLSX.TO.W.0035.000000T0000Z-211025T0315Z/
St. Clair IL-
1003 PM CDT Sun Oct 24 2021
...THE TORNADO WARNING FOR NORTHEASTERN ST. CLAIR COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 100 AM CDT for southwestern
Illinois.
LAT...LON 3851 8983 3866 8992 3866 8991 3865 8971
3853 8971
TIME...MOT...LOC 0301Z 253DEG 45KT 3864 8960
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 24, 7:39 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 51 min |
| Oct 24, 7:59 PM CDT | River Flood Warning | LSX | Brown | 33 hr |
| Oct 24, 8:03 PM CDT | Tornado Warning | LSX | Monroe, Randolph | 42 min |
| Oct 24, 8:27 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 48 min |
| Oct 24, 8:34 PM CDT | Tornado Warning | LSX | Randolph | 41 min |
| Oct 24, 9:00 PM CDT | Tornado Warning | LSX | Clinton, Randolph, Saint Clair, Washington | 45 min |
| Oct 24, 9:08 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 54 min |
| Oct 24, 9:08 PM CDT | Tornado Warning | LSX | Randolph | 40 min |
| Oct 24, 9:15 PM CDT | Tornado Warning | LSX | Randolph | 19 min |
| Oct 24, 9:48 PM CDT | Tornado Warning | LSX | Bond, Clinton, Madison | 42 min |
| Oct 24, 9:58 PM CDT | Tornado Warning | LSX | Marion, Washington | 16 min |
| Oct 24, 10:13 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 62 min |
| Oct 24, 10:40 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 26 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.