Alert archive / Illinois / Tornado Warnings in 2026
Tornado Warning 56, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 16, 2026, 3:56 PM CDT for Clinton County, Illinois. It was in force for 15 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
- May 16, 2026, 3:56 PM CDT (20:56 UTC)
- Expired
- May 16, 2026, 4:11 PM CDT
- In force
- 15 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Clinton County, IL
The radar
The St Louis radar (KLSX), 127 km from the middle of the area, began a volume at 20:56 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 |
|---|---|---|---|
| May 16, 3:46 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.9 hours before the alert went out and 180 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
- 351 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1001 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -79 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
The text
As transmitted.
548
WFUS53 KLSX 162056
TORLSX
ILC027-162130-
/O.NEW.KLSX.TO.W.0056.260516T2056Z-260516T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
356 PM CDT Sat May 16 2026
The National Weather Service in St Louis has issued a
* Tornado Warning for...
East Central Clinton County in south central Illinois...
* Until 430 PM CDT.
* At 356 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Shattuc, or 8 miles east of Carlyle, moving east
at 15 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 tornado will be near...
Shattuc around 405 PM CDT.
Other locations impacted by the tornado include Ferrin and Huey.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a well-built building
away from 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 3859 8930 3866 8927 3867 8914 3854 8914
TIME...MOT...LOC 2055Z 270DEG 11KT 3862 8923
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
191 follow-up statement
061 WWUS53 KLSX 162111 SVSLSX Severe Weather Statement National Weather Service St Louis MO 411 PM CDT Sat May 16 2026 ILC027-162121- /O.CAN.KLSX.TO.W.0056.000000T0000Z-260516T2130Z/ Clinton IL- 411 PM CDT Sat May 16 2026 ...TORNADO WARNING IS CANCELLED FOR EAST CENTRAL CLINTON COUNTY... The storm which prompted the warning has moved out of the area. Therefore, the warning has been cancelled. However, small hail and gusty winds are still possible with this thunderstorm. A Severe Thunderstorm Watch remains in effect until 1000 PM CDT Saturday for a portion of south central Illinois. && LAT...LON 3859 8930 3866 8927 3867 8914 3854 8914 TIME...MOT...LOC 2056Z 269DEG 13KT 3862 8919 $$ BRC
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 10:02 AM CDT | Areal Flood Advisory | LSX | Calhoun | 3 hr |
| May 16, 12:10 PM CDT | Areal Flood Advisory | LSX | Pike | 3 hr |
| May 16, 12:57 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 14 min |
| May 16, 3:20 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 40 min |
| May 16, 3:30 PM CDT | Severe Thunderstorm Warning | LSX | Clinton | 60 min |
| May 16, 3:36 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 39 min |
| May 16, 4:03 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 57 min |
| May 16, 4:17 PM CDT | Tornado Warning | LSX | Marion | 43 min |
Nearby
Tornado Warnings in Illinois, 2026Every tornado warning in 2026Tornadoes in 2026
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.