Alert archive / Missouri / Tornado Warnings in 2026
Tornado Warning 76, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Jul 31, 2026, 5:45 PM CDT for Callaway County, Gasconade County, Osage County, Missouri. It was in force for 28 min. 1 report 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
- Jul 31, 2026, 5:45 PM CDT (22:45 UTC)
- Expired
- Jul 31, 2026, 6:13 PM CDT
- In force
- 28 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
Counties Callaway County, MO, Gasconade County, MO, Osage County, MO
The radar
The St Louis radar (KLSX), 88 km from the middle of the area, began a volume at 22:46 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 |
|---|---|---|---|
| Jul 31, 5:59 PM CDT | TORNADO | 4 Sse Chamois, MO | Video from local resident shows tornado moving through a wooded area just west of Highway 89. The tornado impacted the residents farm, causing minor damage to the house and partial roof loss to an outbuilding. Minor tree damage was also noted in the vicinity. |
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 |
|---|---|---|---|
| Jul 31, 3:26 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 10.8 hours before the alert went out and 269 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
- 714 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 952 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 272 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.2
The text
As transmitted.
847
WFUS53 KLSX 312245
TORLSX
MOC027-073-151-312330-
/O.NEW.KLSX.TO.W.0076.260731T2245Z-260731T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
545 PM CDT Fri Jul 31 2026
The National Weather Service in St Louis has issued a
* Tornado Warning for...
Southeastern Callaway County in central Missouri...
Northeastern Osage County in central Missouri...
Northwestern Gasconade County in east central Missouri...
* Until 630 PM CDT.
* At 545 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Chamois, or 12 miles north of Linn, moving east at
25 mph.
HAZARD...Tornado and ping pong ball 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.
* Locations impacted include...
Mokane, Steedman, Chamois, Portland, Morrison, Gasconade and Bay.
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 3862 9193 3872 9189 3871 9165 3870 9165
3870 9162 3868 9158 3865 9150 3848 9154
TIME...MOT...LOC 2245Z 283DEG 21KT 3866 9185
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
192 follow-up statements
921
WWUS53 KLSX 312254
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
554 PM CDT Fri Jul 31 2026
MOC027-312304-
/O.CAN.KLSX.TO.W.0076.000000T0000Z-260731T2330Z/
Callaway MO-
554 PM CDT Fri Jul 31 2026
...TORNADO WARNING IS CANCELLED FOR SOUTHEASTERN CALLAWAY COUNTY...
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.
A Tornado Watch remains in effect until 1100 PM CDT Friday for a
portion of central Missouri.
&&
LAT...LON 3852 9164 3858 9182 3867 9185 3868 9181
3868 9176 3871 9173 3871 9171 3870 9165
3870 9162 3869 9160 3868 9159 3865 9150
3848 9154
TIME...MOT...LOC 2245Z 283DEG 21KT 3866 9184
$$
MOC073-151-312330-
/O.CON.KLSX.TO.W.0076.000000T0000Z-260731T2330Z/
Gasconade MO-Osage MO-
554 PM CDT Fri Jul 31 2026
...TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHEASTERN OSAGE AND NORTHWESTERN GASCONADE COUNTIES...
At 554 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Chamois, or 12 miles north of Linn, moving east at
25 mph.
HAZARD...Tornado and ping pong ball 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...
Chamois around 555 PM CDT.
Other locations impacted by the tornado include Portland, Morrison,
Gasconade and Bay.
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 3852 9164 3858 9182 3867 9185 3868 9181
3868 9176 3871 9173 3871 9171 3870 9165
3870 9162 3869 9160 3868 9159 3865 9150
3848 9154
TIME...MOT...LOC 2245Z 283DEG 21KT 3866 9184
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
19200
WWUS53 KLSX 312313
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
613 PM CDT Fri Jul 31 2026
MOC073-151-312323-
/O.CAN.KLSX.TO.W.0076.000000T0000Z-260731T2330Z/
Gasconade MO-Osage MO-
613 PM CDT Fri Jul 31 2026
...TORNADO WARNING IS CANCELLED FOR NORTHEASTERN OSAGE AND
NORTHWESTERN GASCONADE COUNTIES...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However, small hail, gusty
winds, and heavy rain are still possible with this thunderstorm.
A Tornado Watch remains in effect until 1100 PM CDT Friday for
portions of central and east central Missouri.
&&
LAT...LON 3852 9164 3858 9182 3867 9185 3868 9181
3868 9176 3871 9173 3871 9171 3870 9165
3870 9162 3869 9160 3868 9159 3865 9150
3848 9154
TIME...MOT...LOC 2254Z 283DEG 21KT 3864 9178
$$
19The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 9:02 AM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 3 hr |
| Jul 31, 9:11 AM CDT | Areal Flood Advisory | LSX | Franklin | 3 hr |
| Jul 31, 9:32 AM CDT | Areal Flood Advisory | LSX | Jefferson | 3 hr |
| Jul 31, 5:26 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Osage | 49 min |
| Jul 31, 6:20 PM CDT | Severe Thunderstorm Warning | LSX | Gasconade, Osage | 40 min |
| Jul 31, 6:33 PM CDT | Tornado Warning | LSX | Franklin, Gasconade | 32 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.