Alert archive / Missouri / Tornado Warnings in 2026

Tornado Warning 37, NWS St. Louis, MO

April 27, 2026Saint Charles County, Warren County, Missouri

NWS St. Louis, MO issued this tornado warning at Apr 27, 2026, 2:49 PM CDT for Saint Charles County, Warren County, Missouri. It was in force for 41 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 27, 2026, 2:49 PM CDT (19:49 UTC)
Expired
Apr 27, 2026, 3:30 PM CDT
In force
41 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Saint Charles County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 20 km from the middle of the area, began a volume at 19:48 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.

IssuedProductOfficeLasted
Apr 27, 12:50 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.8 hours before the alert went out and 237 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.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2026-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2026-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1053 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
306 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

823 
WFUS53 KLSX 271949
TORLSX
MOC183-219-272030-
/O.NEW.KLSX.TO.W.0037.260427T1949Z-260427T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
249 PM CDT Mon Apr 27 2026

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northwestern Saint Charles County in east central Missouri...
  Southeastern Warren County in east central Missouri...

* Until 330 PM CDT.

* At 249 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Innsbrook, or 6 miles south of Wright City, moving
  northeast at 50 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...
  Innsbrook around 250 PM CDT.
  Wright City and New Melle around 255 PM CDT.
  Wentzville, Josephville, Lake St. Louis and Dardenne Prairie around
  305 PM CDT.

Other locations impacted by the tornado include Foristell, Flint Hill
and Kampville.

This includes Interstate 70 in Missouri between exits 199 and 228.

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 3864 9113 3875 9113 3887 9101 3887 9096
      3889 9096 3888 9082 3892 9079 3893 9073
      3892 9073 3891 9072 3892 9071 3892 9068
      3893 9070 3893 9067 3889 9063 3887 9058
      3887 9055 3879 9048
TIME...MOT...LOC 1949Z 246DEG 43KT 3874 9103

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Jaja
5 follow-up statements
109 
WWUS53 KLSX 271958
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
258 PM CDT Mon Apr 27 2026

MOC219-272008-
/O.CAN.KLSX.TO.W.0037.000000T0000Z-260427T2030Z/
Warren MO-
258 PM CDT Mon Apr 27 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 900 PM CDT Monday for a
portion of east central Missouri.

&&

LAT...LON 3889 9096 3888 9081 3892 9079 3893 9073
      3892 9073 3891 9072 3892 9071 3892 9068
      3893 9070 3893 9067 3889 9063 3887 9058
      3887 9055 3879 9048 3868 9096
TIME...MOT...LOC 1949Z 246DEG 43KT 3874 9103

$$


MOC183-272030-
/O.CON.KLSX.TO.W.0037.000000T0000Z-260427T2030Z/
Saint Charles MO-
258 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
NORTHWESTERN SAINT CHARLES COUNTY...

At 258 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Wentzville, moving northeast at 50 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...
  New Melle around 300 PM CDT.
  Wentzville, Josephville, Lake St. Louis and Dardenne Prairie around
  305 PM CDT.
  O'Fallon, St. Paul and Cottleville around 310 PM CDT.

Other locations impacted by the tornado include Foristell, Flint Hill
and Kampville.

This includes Interstate 70 in Missouri between exits 203 and 227.

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 3889 9096 3888 9081 3892 9079 3893 9073
      3892 9073 3891 9072 3892 9071 3892 9068
      3893 9070 3893 9067 3889 9063 3887 9058
      3887 9055 3879 9048 3868 9096
TIME...MOT...LOC 1949Z 246DEG 43KT 3874 9103

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Jaja
773 
WWUS53 KLSX 272007
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
307 PM CDT Mon Apr 27 2026

MOC183-272030-
/O.CON.KLSX.TO.W.0037.000000T0000Z-260427T2030Z/
Saint Charles MO-
307 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
NORTHWESTERN SAINT CHARLES COUNTY...

At 307 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Josephville, or over St. Paul, moving northeast at
50 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...
  O'Fallon, St. Paul, Josephville, Lake St. Louis, Wentzville,
  Dardenne Prairie and Cottleville around 310 PM CDT.
  St. Peters around 315 PM CDT.
  St. Charles around 320 PM CDT.

Other locations impacted by the tornado include Flint Hill and
Kampville.

This includes Interstate 70 in Missouri between exits 208 and 227.

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 3893 9073 3892 9073 3891 9072 3892 9071
      3892 9068 3893 9070 3893 9067 3889 9063
      3887 9058 3887 9055 3879 9048 3874 9071
      3872 9077 3870 9089 3889 9092 3888 9081
      3892 9079 3892 9076
TIME...MOT...LOC 1958Z 246DEG 43KT 3878 9090

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Jaja
920 
WWUS53 KLSX 272017
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
317 PM CDT Mon Apr 27 2026

MOC183-272030-
/O.CON.KLSX.TO.W.0037.000000T0000Z-260427T2030Z/
Saint Charles MO-
317 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
NORTHWESTERN SAINT CHARLES COUNTY...

At 317 PM CDT, a severe thunderstorm capable of producing a tornado
was located near St. Peters, moving east at 45 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...
  St. Peters, O'Fallon, Cottleville, St. Paul, Dardenne Prairie and
  Lake St. Louis around 320 PM CDT.
  St. Charles around 325 PM CDT.

Other locations impacted by the tornado include Kampville.

This includes Interstate 70 in Missouri between exits 216 and 227.

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 3893 9073 3892 9073 3891 9072 3891 9071
      3892 9072 3892 9068 3893 9070 3893 9067
      3889 9063 3887 9058 3887 9055 3879 9048
      3874 9071 3888 9081 3892 9079 3892 9076
TIME...MOT...LOC 2007Z 250DEG 39KT 3879 9078

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore
572 
WWUS53 KLSX 272021
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
321 PM CDT Mon Apr 27 2026

MOC183-272030-
/O.CON.KLSX.TO.W.0037.000000T0000Z-260427T2030Z/
Saint Charles MO-
321 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR NORTH
CENTRAL SAINT CHARLES COUNTY...

At 321 PM CDT, a severe thunderstorm capable of producing a tornado
was located near St. Peters, moving east at 50 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...
  St. Charles, St. Peters, O'Fallon and Cottleville around 325 PM
  CDT.

Other locations impacted by the tornado include Kampville.

This includes Interstate 70 in Missouri between exits 217 and 227.

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 3888 9075 3890 9070 3891 9067 3892 9066
      3889 9063 3887 9058 3887 9055 3879 9048
      3877 9059 3875 9067
TIME...MOT...LOC 2017Z 251DEG 39KT 3883 9065

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Elmore
968 
WWUS53 KLSX 272026
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
326 PM CDT Mon Apr 27 2026

MOC183-272036-
/O.EXP.KLSX.TO.W.0037.000000T0000Z-260427T2030Z/
Saint Charles MO-
326 PM CDT Mon Apr 27 2026

...TORNADO WARNING WILL EXPIRE AT 330 PM CDT FOR NORTH CENTRAL SAINT
CHARLES COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. A Tornado Warning
still remains in effect for eastern Saint Charles County|.

A Tornado Watch remains in effect until 900 PM CDT for a portion of
east central Missouri.

&&

LAT...LON 3888 9075 3890 9070 3891 9067 3892 9066
      3889 9063 3887 9058 3887 9055 3879 9048
      3877 9059 3875 9067
TIME...MOT...LOC 2021Z 251DEG 39KT 3884 9060

$$

Elmore

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 8:43 PM CDTTornado WarningLSXBoone, Callaway, Cole, Moniteau30 min
Apr 26, 10:08 PM CDTTornado WarningLSXOsage13 min
Apr 27, 1:06 AM CDTSevere Thunderstorm WarningLSXCrawford39 min
Apr 27, 2:10 AM CDTAreal Flood AdvisoryLSXCrawford3 hr
Apr 27, 2:44 AM CDTSevere Thunderstorm WarningLSXWashington31 min
Apr 27, 3:08 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXSainte Genevieve, Saint Francois, Washington52 min
Apr 27, 3:36 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois39 min
Apr 27, 3:41 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren49 min
Apr 27, 4:02 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve24 min
Apr 27, 6:52 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXKnox, Shelby38 min
Apr 27, 7:35 AM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Monroe, Shelby55 min
Apr 27, 7:54 AM CDTTornado WarningLSXMonroe, Ralls51 min
Apr 27, 8:10 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXAudrain, Lincoln, Marion, Pike, Ralls65 min
Apr 27, 8:24 AM CDTTornado WarningLSXPike, Ralls51 min
Apr 27, 10:09 AM CDTRiver Flood WarningLSXOsage24 hr
Apr 27, 10:41 AM CDTFlash Flood WarningLSXBoone, Cole, Moniteau3 hr
Apr 27, 11:18 AM CDTFlood WatchLSXAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 10 more10 hr
Apr 27, 11:48 AM CDTFlash Flood WarningLSXAudrain, Boone, Callaway, Cole, Moniteau, Montgomery and 1 more3 hr
Apr 27, 12:09 PM CDTAreal Flood AdvisoryLSXLincoln, Pike, Warren3 hr
Apr 27, 12:27 PM CDTTornado WarningLSXSaint Charles, Saint Louis, City of Saint Louis48 min
Apr 27, 1:25 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis37 min
Apr 27, 1:51 PM CDTAreal Flood AdvisoryLSXMontgomery, Warren3 hr
Apr 27, 1:55 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis45 min
Apr 27, 2:01 PM CDTTornado WarningLSXCity of Saint Louis27 min
Apr 27, 2:05 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike, Warren40 min
Apr 27, 2:13 PM CDTAreal Flood AdvisoryLSXSaint Louis, City of Saint Louis3 hr
Apr 27, 2:39 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles, Warren51 min
Apr 27, 2:42 PM CDTRiver Flood WarningLSXMonroe20 hr
Apr 27, 2:54 PM CDTRiver Flood WarningLSXJefferson, Saint Louis6 days
Apr 27, 2:57 PM CDTSevere Thunderstorm WarningLSXBoone, Moniteau48 min
Apr 27, 3:05 PM CDTRiver Flood WarningLSXPerry, Sainte Genevieve8 days
Apr 27, 3:14 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis46 min
Apr 27, 3:19 PM CDTTornado WarningLSXSaint Charles, Saint Louis41 min
Apr 27, 3:25 PM CDTSevere Thunderstorm WarningLSXAudrain, Callaway42 min
Apr 27, 3:37 PM CDTFlash Flood WarningLSXBoone5 hr
Apr 27, 3:39 PM CDTRiver Flood WarningLSXLewis11 hr
Apr 27, 3:41 PM CDTRiver Flood WarningLSXLincoln24 hr
Apr 27, 3:41 PM CDTTornado WarningLSXAudrain, Callaway49 min
Apr 27, 3:43 PM CDTSevere Thunderstorm WarningLSXBoone62 min
Apr 27, 3:46 PM CDTSevere Thunderstorm WarningLSXMarion, Pike, Ralls44 min
Apr 27, 3:46 PM CDTTornado WarningLSXBoone14 min
Apr 27, 3:53 PM CDTRiver Flood WarningLSXLincoln4 days
Apr 27, 3:59 PM CDTRiver Flood WarningLSXCrawford, Washington18 hr
Apr 27, 4:00 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway, Moniteau60 min
Apr 27, 4:07 PM CDTSevere Thunderstorm WarningLSXAudrain, Pike, Ralls53 min
Apr 27, 4:09 PM CDTTornado WarningLSXAudrain, Montgomery, Pike, Ralls51 min
Apr 27, 4:13 PM CDTFlash Flood WarningLSXAudrain5 hr
Apr 27, 4:29 PM CDTTornado WarningLSXBoone, Callaway, Cole, Moniteau46 min
Apr 27, 4:34 PM CDTTornado WarningLSXMarion29 min
Apr 27, 4:35 PM CDTFlash Flood WarningLSXMonroe5 hr
Apr 27, 4:46 PM CDTTornado WarningLSXPike44 min
Apr 27, 4:52 PM CDTFlash Flood WarningLSXMarion, Ralls4 hr
Apr 27, 4:54 PM CDTTornado WarningLSXAudrain, Pike21 min
Apr 27, 4:57 PM CDTRiver Flood WarningLSXCallaway, Osage4 days
Apr 27, 4:57 PM CDTRiver Flood WarningLSXGasconade, Montgomery3 days
Apr 27, 4:57 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike63 min
Apr 27, 5:00 PM CDTTornado WarningLSXPike30 min
Apr 27, 5:04 PM CDTRiver Flood WarningLSXMarion22 hr
Apr 27, 5:09 PM CDTSevere Thunderstorm WarningLSXCallaway19 min
Apr 27, 5:14 PM CDTSevere Thunderstorm WarningLSXCallaway, Cole, Osage61 min
Apr 27, 5:20 PM CDTFlash Flood WarningLSXPike, Ralls3 hr
Apr 27, 5:21 PM CDTSevere Thunderstorm WarningLSXPike39 min
Apr 27, 5:32 PM CDTSevere Thunderstorm WarningLSXLincoln43 min
Apr 27, 5:47 PM CDTSevere Thunderstorm WarningLSXLincoln58 min
Apr 27, 5:55 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren50 min
Apr 27, 5:57 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Washington48 min
Apr 27, 5:59 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles46 min
Apr 27, 6:09 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Warren36 min
Apr 27, 6:26 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXFranklin, Jefferson64 min
Apr 27, 6:28 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis47 min
Apr 27, 6:31 PM CDTTornado WarningLSXFranklin, Jefferson, Washington59 min
Apr 27, 6:40 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis48 min
Apr 27, 6:41 PM CDTTornado WarningLSXSaint Charles, Saint Louis32 min
Apr 27, 6:45 PM CDTSevere Thunderstorm WarningLSXCrawford45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.