Alert archive / Missouri / Tornado Warnings in 2026
Tornado Warning 24, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 17, 2026, 9:36 PM CDT for Warren County, Missouri. It was in force for 20 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
- Apr 17, 2026, 9:36 PM CDT (02:36 UTC)
- Expired
- Apr 17, 2026, 9:56 PM CDT
- In force
- 20 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 1.0 in
County Warren County, MO
The radar
The St Louis radar (KLSX), 36 km from the middle of the area, began a volume at 02:40 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 |
|---|---|---|---|
| Apr 17, 3:31 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.6 hours before the alert went out and 272 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
- 1309 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 1221 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 8.2
The text
As transmitted.
602
WFUS53 KLSX 180236
TORLSX
MOC219-180315-
/O.NEW.KLSX.TO.W.0024.260418T0236Z-260418T0315Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
936 PM CDT Fri Apr 17 2026
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Southeastern Warren County in east central Missouri...
* Until 1015 PM CDT.
* At 936 PM CDT, a tornado producing storm was located 5 miles south
of Truesdale, or 5 miles south of Warrenton, moving northeast at 55
mph.
HAZARD...Damaging tornado.
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 tornado will be near...
Innsbrook, Warrenton and Truesdale around 940 PM CDT.
Wright City around 945 PM CDT.
Other locations impacted by the tornado include Foristell.
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 3861 9117 3878 9128 3883 9096 3855 9096
3857 9102 3859 9103 3860 9104 3860 9105
3861 9106 3861 9108 3860 9112 3860 9115
TIME...MOT...LOC 0236Z 235DEG 46KT 3874 9114
TORNADO...OBSERVED
MAX HAIL SIZE...<1.00 IN
$$
BRC1 follow-up statement
865
WWUS53 KLSX 180256
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
956 PM CDT Fri Apr 17 2026
MOC219-180306-
/O.CAN.KLSX.TO.W.0024.000000T0000Z-260418T0315Z/
Warren MO-
956 PM CDT Fri Apr 17 2026
...TORNADO WARNING IS CANCELLED FOR SOUTHEASTERN WARREN COUNTY...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM CDT for a portion of
east central Missouri.
&&
LAT...LON 3861 9117 3878 9128 3883 9096 3855 9096
3857 9102 3859 9103 3860 9104 3860 9105
3861 9106 3861 9108 3860 9112 3860 9115
TIME...MOT...LOC 0236Z 235DEG 46KT 3874 9113
$$
19The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 7:21 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Monroe, Pike, Ralls | 54 min |
| Apr 17, 7:42 PM CDT | Tornado Warning | LSX | Boone, Callaway, Cole, Moniteau | 48 min |
| Apr 17, 7:57 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole, Moniteau, Osage | 63 min |
| Apr 17, 8:17 PM CDT | Tornado Warning | LSX | Boone, Callaway, Cole, Moniteau | 43 min |
| Apr 17, 8:30 PM CDT | Tornado Warning | LSX | Callaway, Cole, Osage | 45 min |
| Apr 17, 8:45 PM CDT | Tornado Warning | LSX | Audrain, Callaway, Montgomery | 45 min |
| Apr 17, 8:57 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Franklin, Gasconade, Montgomery, Osage, Warren | 48 min |
| Apr 17, 9:23 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Pike | 52 min |
| Apr 17, 9:29 PM CDT | Tornado Warning | LSX | Lincoln, Montgomery, Warren | 31 min |
| Apr 17, 9:42 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 48 min |
| Apr 17, 9:50 PM CDT | Tornado Warning | LSX | Lincoln | 25 min |
| Apr 17, 10:02 PM CDT | River Flood Warning | LSX | Lewis | 12 days |
| Apr 17, 10:14 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 31 min |
| Apr 18, 12:52 AM CDT | River Flood Warning | LSX | Lewis | 11 hr |
| Apr 18, 6:04 AM CDT | River Flood Warning | LSX | Osage | 15 hr |
| Apr 18, 9:59 AM CDT | River Flood Warning | LSX | Marion | 10 hr |
| Apr 18, 10:49 AM CDT | River Flood Warning | LSX | Cole | 63 hr |
| Apr 18, 12:05 PM CDT | River Flood Warning | LSX | Marion | 21 days |
| Apr 18, 12:05 PM CDT | River Flood Warning | LSX | Marion | 9 hr |
| Apr 18, 5:05 PM CDT | River Flood Warning | LSX | Reynolds | 16 hr |
Nearby
Tornado Warnings in Missouri, 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.