Alert archive / Illinois / Tornado Warnings in 2026

Tornado Warning 54, NWS St. Louis, MO

April 27, 2026Clinton County, Fayette County, Marion County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 27, 2026, 8:15 PM CDT for Clinton County, Fayette County, Marion County, Illinois. It was in force for 45 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, 8:15 PM CDT (01:15 UTC)
Expired
Apr 27, 2026, 9:00 PM CDT
In force
45 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Tornado
Observed
Hail
1.0 in

Counties Clinton County, IL, Fayette County, IL, Marion County, IL

The radar

The St Louis radar (KLSX), 131 km from the middle of the area, began a volume at 01:15 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 00:00Z, 1.3 hours before the alert went out and 170 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 00:00Z on 2026-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2026-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.1939587897Sfc1 km3 km6 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
1082 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
-57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

860 
WFUS53 KLSX 280115
TORLSX
ILC027-051-121-280200-
/O.NEW.KLSX.TO.W.0054.260428T0115Z-260428T0200Z/

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

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northeastern Clinton County in south central Illinois...
  Southern Fayette County in south central Illinois...
  Marion County in south central Illinois...

* Until 900 PM CDT.

* At 815 PM CDT, a tornado producing storm was located over
  Beckemeyer, or near Carlyle, moving east at 50 mph.

  HAZARD...Damaging tornado and quarter size hail.

  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...
  Carlyle around 820 PM CDT.
  Boulder and Shattuc around 830 PM CDT.
  Fairman and Sandoval around 835 PM CDT.

Other locations impacted by the tornado include Posey, Huey, Ferrin,
Hoffman, Keyesport, Junction City, Vernon, Selmaville, Tonti and
Alma.

This includes the following State Parks...
Carlyle Lake Recreational Area.

This includes Interstate 57 in Illinois between exits 116 and 127.

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 8938 3873 8940 3874 8935 3874 8925
      3876 8925 3882 8900 3882 8880 3857 8876
TIME...MOT...LOC 0114Z 250DEG 43KT 3861 8944

TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN

$$

Elmore
7 follow-up statements
286 
WWUS53 KLSX 280119
SVSLSX

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

ILC027-051-121-280200-
/O.CON.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Clinton IL-Fayette IL-Marion IL-
819 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 9 PM CDT FOR NORTHEASTERN
CLINTON, SOUTHERN FAYETTE AND MARION COUNTIES IN SOUTH CENTRAL
ILLINOIS...

At 819 PM CDT, a confirmed and extremely dangerous tornado was
located over Carlyle, moving east at 45 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado and quarter size hail.

SOURCE...Radar confirmed tornado.

IMPACT...You are in a life-threatening situation. Flying debris may
         be deadly to those caught without shelter. Mobile homes will
         be destroyed. Considerable damage to homes, businesses, and
         vehicles is likely and complete destruction is possible.

This tornado will be near...
  Carlyle around 820 PM CDT.
  Shattuc around 830 PM CDT.
  Sandoval, Boulder and Central City around 835 PM CDT.

Other locations impacted by the tornado include Posey, Huey, Hoffman,
Ferrin, Keyesport, Junction City, Selmaville, Tonti, Brubaker and
Alma.

This includes the following State Parks...
Carlyle Lake Recreational Area.

This includes Interstate 57 in Illinois between exits 116 and 127.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A large and extremely dangerous tornado has been confirmed. Move to
an interior room on the lowest floor of a well-built building. If in
a mobile home, vehicle, or outdoors, move to the closest structure
and protect yourself from flying debris.

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 8938 3873 8940 3874 8935 3874 8925
      3876 8925 3882 8900 3882 8880 3857 8876
TIME...MOT...LOC 0115Z 254DEG 40KT 3859 8944

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
MAX HAIL SIZE...1.00 IN

$$

Elmore
212 
WWUS53 KLSX 280126
SVSLSX

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

ILC027-051-121-280200-
/O.CON.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Clinton IL-Fayette IL-Marion IL-
826 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 9 PM CDT FOR NORTHEASTERN
CLINTON, SOUTHERN FAYETTE AND MARION COUNTIES IN SOUTH CENTRAL
ILLINOIS...

At 826 PM CDT, a tornado producing storm was located near Carlyle,
moving east at 45 mph.

HAZARD...Damaging tornado and quarter size hail.

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...
  Shattuc and Carlyle around 830 PM CDT.
  Sandoval, Boulder and Central City around 835 PM CDT.
  Fairman, Odin and Patoka around 840 PM CDT.

Other locations impacted by the tornado include Ferrin, Huey,
Hoffman, Keyesport, Junction City, Selmaville, Tonti, Brubaker and
Alma.

This includes the following State Parks...
Carlyle Lake Recreational Area.

This includes Interstate 57 in Illinois between exits 116 and 127.

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 8938 3873 8940 3874 8935 3874 8925
      3876 8925 3882 8900 3882 8880 3857 8876
TIME...MOT...LOC 0119Z 254DEG 40KT 3860 8938

TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN

$$

Elmore
436 
WWUS53 KLSX 280130
SVSLSX

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

ILC027-051-121-280200-
/O.CON.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Clinton IL-Fayette IL-Marion IL-
830 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 9 PM CDT FOR NORTHEASTERN
CLINTON, SOUTHERN FAYETTE AND MARION COUNTIES IN SOUTH CENTRAL
ILLINOIS...

At 830 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Fairman, or 9 miles north of Centralia, moving east
at 55 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...
  Fairman, Odin, Sandoval, Patoka and Shattuc around 835 PM CDT.
  Salem around 840 PM CDT.
  Omega, Kinmundy and Farina around 850 PM CDT.

Other locations impacted by the tornado include Junction City, Tonti,
Selmaville, Brubaker, Alma and Iuka.

This includes Interstate 57 in Illinois between exits 116 and 127.

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 3874 8925 3876 8925 3882 8900 3882 8880
      3857 8876 3853 8921
TIME...MOT...LOC 0126Z 255DEG 49KT 3864 8922

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

$$

Elmore
052 
WWUS53 KLSX 280136
SVSLSX

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

ILC027-051-280146-
/O.CAN.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Clinton IL-Fayette IL-
836 PM CDT Mon Apr 27 2026

...TORNADO WARNING IS CANCELLED FOR NORTHEASTERN CLINTON AND SOUTHERN
FAYETTE COUNTIES...

The storm which prompted the warning has moved out of the area.
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 900 PM CDT for a portion of
south central Illinois.

&&

LAT...LON 3879 8914 3882 8900 3882 8880 3857 8876
      3854 8914
TIME...MOT...LOC 0130Z 255DEG 49KT 3865 8914

$$


ILC121-280200-
/O.CON.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Marion IL-
836 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 9 PM CDT FOR MARION COUNTY
IN SOUTH CENTRAL ILLINOIS...

At 836 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fairman, or 6 miles northwest of Salem, moving east
at 55 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...
  Salem, Odin, Fairman and Patoka around 840 PM CDT.
  Omega, Kinmundy and Farina around 850 PM CDT.

Other locations impacted by the tornado include Tonti, Selmaville,
Brubaker, Alma and Iuka.

This includes Interstate 57 in Illinois between exits 116 and 127.

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 3879 8914 3882 8900 3882 8880 3857 8876
      3854 8914
TIME...MOT...LOC 0130Z 255DEG 49KT 3865 8914

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

$$

Elmore
397 
WWUS53 KLSX 280146 RRB
SVSLSX

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

ILC121-280200-
/O.CON.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Marion IL-
846 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 9 PM CDT FOR CENTRAL
MARION COUNTY IN SOUTH CENTRAL ILLINOIS...

At 846 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Kinmundy, or 7 miles northeast of Salem, moving east
at 55 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...
  Omega, Kinmundy and Farina around 850 PM CDT.

Other locations impacted by the tornado include Brubaker, Alma and
Iuka.

This includes Interstate 57 in Illinois near exit 127.

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 3856 8897 3882 8894 3882 8880 3857 8876
TIME...MOT...LOC 0136Z 255DEG 49KT 3867 8905

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

$$

Elmore
662 
WWUS53 KLSX 280154
SVSLSX

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

ILC121-280200-
/O.CON.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Marion IL-
854 PM CDT Mon Apr 27 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 9 PM CDT FOR NORTHEASTERN
MARION COUNTY IN SOUTH CENTRAL ILLINOIS...

At 854 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Stephen Forbes Station, or 14 miles northeast of
Salem, moving east at 55 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...
  Omega and Farina around 855 PM CDT.

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 3857 8882 3874 8886 3882 8880 3857 8876
TIME...MOT...LOC 0146Z 255DEG 49KT 3871 8887

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

$$

Elmore
747 
WWUS53 KLSX 280157
SVSLSX

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

ILC121-280207-
/O.EXP.KLSX.TO.W.0054.000000T0000Z-260428T0200Z/
Marion IL-
857 PM CDT Mon Apr 27 2026

...TORNADO WARNING WILL EXPIRE AT 9 PM CDT FOR NORTHEASTERN MARION
COUNTY IN SOUTH CENTRAL ILLINOIS...

The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 1100 PM CDT for a portion of
south central Illinois.

&&

LAT...LON 3857 8882 3874 8886 3882 8880 3857 8876
TIME...MOT...LOC 0154Z 255DEG 49KT 3874 8874

$$

Elmore

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this tornado warning went out at Apr 27, 6:54 PM CDT, 1 hour 21 minutes earlier. Its key messages:

  • While periods of storms are expected through Monday morning, the most potent thunderstorms will occur through early evening.
  • Thunderstorms this evening will be capable of damaging wind gusts, large hail, and strong tornadoes.
  • A period of cool, calm weather is expected mid-week through the weekend.
Area forecast discussion, Apr 27, 6:54 PM CDT, 1 hour 21 minutes before
Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
654 PM CDT Mon Apr 27 2026

.KEY MESSAGES...

- While periods of storms are expected through Monday morning, the
  most potent thunderstorms will occur through early evening.

- Thunderstorms this evening will be capable of damaging wind
  gusts, large hail, and strong tornadoes.

- A period of cool, calm weather is expected mid-week through the
  weekend.

&&

.SHORT TERM...THROUGH TUESDAY NIGHT/...
Issued at 456 PM CDT Mon Apr 27 2026

(Through Tuesday Night)
Issued at 155 AM CDT Mon Apr 27 2026

Storms across southeastern Missouri continue to butt up against an
instability gradient draped from north to south across Missouri.
The warm air advection feeding these storms will also push greater
instability slowly northeastward through this morning, though
propagation vectors will favor convection continuing to move east-
southeastward generally away from the CWA or into an unfavorable
environment. Additionally, the low-level jet refocusing across
Kansas will continue to support the downward trend in convection
across southeastern Missouri early this morning. Any linger storms
over the next couple of hours will be capable mainly of large hail,
though there is also a very low damaging wind and tornado threat for
storms that remain surface based.

Our attention turns to the storms over eastern Kansas that are
propagating eastward with the nose of the low-level jet. With the
nose of this low-level jet edging into northeastern Missouri later
this morning, the focus for these storms will spread into portions
of the CWA north of I-70. Vertical thermal profiles suggest that this
convection will be elevated, mitigating a threat of damaging wind
gusts and/or tornadoes. However, with around 40 kts of effective
shear and building MUCAPE, there is a low chance for isolated
instances of large hail.

How long this convection lingers is uncertain, although guidance
trends have been toward a lull in convective activity in the wake of
this convection and that associated with a cold front during the
late afternoon and evening. Ahead of the front, the warm sector
remains capped through much of the afternoon per a majority of
deterministic soundings. Although, any remnant outflow or
differential heating boundary from early day convection may serve as
enough of a forcing mechanism to spawn discrete convection during
the afternoon as lift from an approaching shortwave increases over
the region. If this convection does form, it will be in an
environment characterized by 2,000-2,500 J/kg of SBCAPE and roughly
50 kts of deep-layer shear. This will favor supercells capable of
all hazards, with long curved hodographs favoring strong tornadoes,
especially if storms are able to latch on to any remnant boundaries
across the CWA.

Where the environment isn't contaminated from earlier rounds of
convection, additional updrafts are expected along the cold front as
it enters the area 4-5pm. Forcing from the front paired with lift
from the shortwave will lead to numerous updrafts along the front.
While this will be occurring within a similar environment detailed
prior, the number of updrafts paired with them occurring along the
front may lead to destructive interactions and congealing into line
segments and/or clusters. While this will tend to limit a strong
tornado threat, storms will still be capable of all severe hazards.
Convection is expected to depart the CWA with the front by 9-10pm.

Even with the FROPA Monday evening, the threat for convection will
continue on Tuesday. Guidance consensus has the front stalling just
south of the CWA early Tuesday and then buckling northward as a
shortwave moves through the Central Plains and into the Midwest
through the day. This shortwave will send a subtle surface
reflection through the Mid South along the front, with a brief
period of warm air advection that will help force elevated
convection for areas mainly along and south of I-70. If the front
can move northward enough, shear profiles and instability amounts
favor supercells capable primarily of large hail across far
southeastern Missouri during the afternoon. Waning instability and
the front continuing southward will bring an end to rain chances
during the evening.

Elmore

&&

.LONG TERM...WEDNESDAY THROUGH MONDAY/...
Issued at 456 PM CDT Mon Apr 27 2026

(Tuesday Night through Sunday)
Issued at 155 AM CDT Mon Apr 27 2026

Both deterministic guidance and ensemble clusters keep upper-level
troughing slowly moving eastward over the eastern CONUS through the
long range forecast period. This will maintain northwesterly flow
over the Middle Mississippi Valley through Saturday as several
rounds of high pressure pass through the region. As a result,
temperatures will run at or below climatological normals into the
weekend and mostly dry weather is expected.

Elmore

&&

.AVIATION...  (For the 00z TAFs through 00z Tuesday Evening)
Issued at 654 PM CDT Mon Apr 27 2026

Ongoing line of strong to severe thunderstorms moving through the
STL Metro area at the start of this TAF period. Storms along this
line will be capable of damaging winds, large hail and tornadoes.
The line will gradually move east-southeast and exit the forecast
area by 03-04Z. Remainder of the period will generally see calmer
conditions with VFR cloud cover. However, another round of showers
and isolated TSRA will spread into the forecast area from the
southwest after 18-20Z Tuesday. This will mostly impact COU/JEF
during this TAF period, but could spread MVFR ceilings into the
SUS/STL vicinity after 28/23Z.

SPECIFICS FOR KSTL: Broken line of +TSRA will bring a potential
for erratic, possibly damaging winds to STL through 01Z-02Z. Radar
trends show the strongest thunderstorm cores skirting around the
terminal, though additional development is possible within the
next hour. After TSRA exit to the east, VFR conditions dominate
until late in this TAF period (after 29/02Z) when MVFR conditions
could move in from the southwest.

WFO LSX

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch until 9 PM CDT this evening for Audrain MO-Boone MO-
     Callaway MO-Cole MO-Franklin MO-Gasconade MO-Jefferson MO-
     Lincoln MO-Moniteau MO-Montgomery MO-Osage MO-Pike MO-Saint
     Charles MO-Saint Louis City MO-Saint Louis MO-Warren MO.

IL...Flood Watch until 9 PM CDT this evening for Bond IL-Calhoun IL-
     Clinton IL-Fayette IL-Greene IL-Jersey IL-Macoupin IL-
     Madison IL-Marion IL-Monroe IL-Montgomery IL-Saint Clair IL-
     Washington IL.

&&

WFO LSX
Hazardous weather outlook, Apr 27, 2:02 AM CDT, 18 hours 13 minutes before
Hazardous Weather Outlook
National Weather Service St Louis MO
202 AM CDT Mon Apr 27 2026

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-280715-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
202 AM CDT Mon Apr 27 2026

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Today and tonight.

Periods of thunderstorms are expected through the day into this
evening. Thunderstorms this afternoon and evening will be capable of
large hail, damaging wind gusts, and tornadoes.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a chance of thunderstorms Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report wind damage, hail occurrence and
size, and tornado occurrence to NWS St. Louis.

Elmore

In the hours before

Local storm report, Apr 27, 7:33 PM CDT, 42 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
733 PM CDT Mon Apr 27 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0710 PM     Tstm Wnd Dmg     Florissant              38.80N 90.32W
04/27/2026                   St. Louis          MO   Public

            4 buildings collapsed in Florissant.

&&
Local storm report, Apr 27, 7:35 PM CDT, 40 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
735 PM CDT Mon Apr 27 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0730 PM     Tstm Wnd Gst     Hamel                   38.89N 89.84W
04/27/2026  E70 MPH          Madison            IL   Public

&&
Local storm report, Apr 27, 7:44 PM CDT, 31 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
744 PM CDT Mon Apr 27 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0735 PM     Tstm Wnd Dmg     2 SE Belleville         38.51N 89.98W
04/27/2026                   St. Clair          IL   Emergency Mngr

            *** 3 INJ ***
            tree onto a house with potential injuries.

&&
Local storm report, Apr 27, 7:47 PM CDT, 28 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
747 PM CDT Mon Apr 27 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0558 PM     Hail             1 N Jerseyville         39.14N 90.32W
04/27/2026  E1.00 Inch       Jersey             IL   Public

            Report from mPING: Quarter (1.00 in.).

0626 PM     Hail             2 S Gerald              38.36N 91.32W
04/27/2026  M1.25 Inch       Franklin           MO   Public

0644 PM     Hail             1 SW Pacific            38.47N 90.76W
04/27/2026  E1.00 Inch       Franklin           MO   Public

            Report from mPING: Quarter (1.00 in.).

0648 PM     Hail             2 E Gray Summit         38.49N 90.79W
04/27/2026  E1.25 Inch       Franklin           MO   Public

            Report from mPING: Half Dollar (1.25 in.).

0654 PM     Hail             4 N Pacific             38.53N 90.75W
04/27/2026  E2.00 Inch       Franklin           MO   Public

            Report from mPING: Hen Egg (2.00 in.).

0655 PM     Hail             2 NW Alton              38.93N 90.19W
04/27/2026  E1.50 Inch       Madison            IL   Public

            Report from mPING: Ping Pong Ball (1.50
            in.).

0658 PM     Hail             2 SW Clarkson Valley    38.60N 90.62W
04/27/2026  E1.00 Inch       St. Louis          MO   Public

            Report from mPING: Quarter (1.00 in.).

0659 PM     Hail             1 NE Alton              38.91N 90.13W
04/27/2026  E1.00 Inch       Madison            IL   Public

            Report from mPING: Quarter (1.00 in.).

0700 PM     Hail             2 N Wood River          38.89N 90.08W
04/27/2026  E1.25 Inch       Madison            IL   Public

0707 PM     Hail             1 NW Bethalto           38.91N 90.06W
04/27/2026  E1.75 Inch       Madison            IL   Public

            Report from mPING: Golf Ball (1.75 in.).

0708 PM     Hail             Bunker Hill             39.04N 89.95W
04/27/2026  E1.00 Inch       Macoupin           IL   Public

            Report from mPING: Quarter (1.00 in.).

0709 PM     Hail             1 S Bunker Hill         39.02N 89.95W
04/27/2026  E1.00 Inch       Macoupin           IL   Public

            Report from mPING: Quarter (1.00 in.).

0711 PM     Hail             3 W Carpenter           38.91N 89.95W
04/27/2026  E1.00 Inch       Madison            IL   Public

            Report from mPING: Quarter (1.00 in.).

0715 PM     Hail             3 W Carpenter           38.91N 89.95W
04/27/2026  E1.25 Inch       Madison            IL   Public

            Report from mPING: Half Dollar (1.25 in.).

0718 PM     Hail             2 S Benld               39.06N 89.81W
04/27/2026  E1.00 Inch       Macoupin           IL   Public

            Report from mPING: Quarter (1.00 in.).

0720 PM     Hail             Staunton                39.01N 89.78W
04/27/2026  E1.00 Inch       Macoupin           IL   Public

            Report from mPING: Quarter (1.00 in.).

0733 PM     Hail             3 SE Columbia           38.43N 90.18W
04/27/2026  E1.00 Inch       Monroe             IL   Public

            Report from mPING: Quarter (1.00 in.).

&&
Local storm report, Apr 27, 7:50 PM CDT, 25 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
750 PM CDT Mon Apr 27 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0720 PM     Tstm Wnd Dmg     1 E Richmond Heights    38.63N 90.31W
04/27/2026                   St. Louis City     MO   Emergency Mngr

            power line down on McCausland.

&&
Local storm report, Apr 27, 7:54 PM CDT, 21 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
754 PM CDT Mon Apr 27 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0740 PM     Tstm Wnd Gst     1 S Swansea             38.53N 89.99W
04/27/2026  E55 MPH          St. Clair          IL   Public

&&

MCF

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 7:09 PM CDTSevere Thunderstorm WarningLSXBond, Fayette, Macoupin, Madison, Montgomery51 min
Apr 27, 7:12 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXMadison, Monroe, Saint Clair63 min
Apr 27, 7:16 PM CDTFlash Flood WarningLSXMontgomery5 hr
Apr 27, 7:22 PM CDTTornado WarningLSXFayette, Montgomery38 min
Apr 27, 7:24 PM CDTSevere Thunderstorm WarningLSXMonroe51 min
Apr 27, 7:50 PM CDTSevere Thunderstorm WarningLSXBond, Clinton, Fayette, Madison, Marion55 min
Apr 27, 7:52 PM CDTTornado WarningLSXClinton, Saint Clair38 min
Apr 27, 7:54 PM CDTAreal Flood AdvisoryLSXMadison4 hr
Apr 27, 7:56 PM CDTSevere Thunderstorm WarningLSXClinton, Monroe, Randolph, Saint Clair, Washington64 min
Apr 27, 7:59 PM CDTFlash Flood WarningLSXFayette6 hr
Apr 27, 8:22 PM CDTAreal Flood AdvisoryLSXBond6 hr
Apr 27, 8:30 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXClinton, Fayette, Marion, Washington37 min
Apr 27, 8:44 PM CDTTornado WarningLSXMarion17 min
Apr 27, 8:55 PM CDTSevere Thunderstorm WarningLSXRandolph30 min
Apr 27, 10:37 PM CDTRiver Flood WarningLSXAdams37 hr
Apr 27, 10:37 PM CDTRiver Flood WarningLSXAdams56 hr
Apr 27, 11:43 PM CDTAreal Flood WarningLSXMacoupin4 hr
Apr 28, 12:16 AM CDTAreal Flood WarningLSXMontgomery6 hr
Apr 28, 1:50 AM CDTAreal Flood WarningLSXFayette6 hr
Apr 28, 7:40 AM CDTAreal Flood WarningLSXFayette12 hr
Apr 28, 11:25 AM CDTRiver Flood WarningLSXBrown25 hr
Apr 28, 11:25 AM CDTRiver Flood WarningLSXMorgan, Pike4 days
Apr 28, 11:38 AM CDTRiver Flood WarningLSXMadison6 days
Apr 28, 11:38 AM CDTRiver Flood WarningLSXMonroe4 days
Apr 28, 11:38 AM CDTRiver Flood WarningLSXMadison5 days
Apr 28, 11:38 AM CDTRiver Flood WarningLSXSaint Clair5 days

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.