Alert archive / Illinois / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 110, NWS St. Louis, MO

April 27, 2026Calhoun County, Greene County, Jersey County, Illinois; Lincoln County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 2026, 5:47 PM CDT for Calhoun County, Greene County, Jersey County, Illinois; Lincoln County, Missouri. It was in force for 58 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: Apr 27, 2026, 5:47 PM CDT (22:47 UTC)
Expired: Apr 27, 2026, 6:45 PM CDT
In force: 58 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Calhoun County, IL, Greene County, IL, Jersey County, IL, Lincoln County, MO

The radar

The St Louis radar (KLSX), 65 km from the middle of the area, began a volume at 22:50 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
Apr 27, 5:55 PM CDT	HAIL 0.75	Roodhouse, IL	8-10 minutes of penny-sized hail.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm 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.

Issued	Product	Office	Lasted
Apr 27, 12:50 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 194 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

690 
WUUS53 KLSX 272247
SVRLSX
ILC013-061-083-MOC113-272345-
/O.NEW.KLSX.SV.W.0110.260427T2247Z-260427T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
547 PM CDT Mon Apr 27 2026

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Central Calhoun County in southwestern Illinois...
  Greene County in southwestern Illinois...
  Northwestern Jersey County in southwestern Illinois...
  Northeastern Lincoln County in east central Missouri...

* Until 645 PM CDT.

* At 547 PM CDT, severe thunderstorms were located along a line from
  5 miles northwest of Roodhouse to 5 miles northeast of Davis, or
  along a line from 7 miles northwest of White Hall to 9 miles north
  of Troy, moving northeast at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage to
           roofs, siding, and trees.

* Locations impacted include...
  Elsberry, Hamburg, Kampsville, Roodhouse, Michael, Hardin,
  Haypress, Eldred, Walkersville, White Hall, Fieldon, Woody,
  Belltown, Berdan, Carrollton, Athensville, Wrights, Old Kane, Kane
  and Greenfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds and
large hail.

Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.

A Tornado Watch remains in effect until 900 PM CDT for portions of
southwest Illinois and east central Missouri.

&&

LAT...LON 3919 9077 3922 9074 3922 9072 3923 9072
      3925 9073 3928 9070 3936 9065 3942 9051
      3952 9038 3952 9015 3951 9015 3928 9023
      3917 9035 3907 9060 3904 9090
TIME...MOT...LOC 2247Z 244DEG 23KT 3953 9046 3928 9083 3910 9094

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Elmore

3 follow-up statements

801 
WWUS53 KLSX 272311
SVSLSX

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

ILC013-061-083-MOC113-272345-
/O.CON.KLSX.SV.W.0110.000000T0000Z-260427T2345Z/
Calhoun IL-Greene IL-Jersey IL-Lincoln MO-
611 PM CDT Mon Apr 27 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
CENTRAL CALHOUN, GREENE, NORTHWESTERN JERSEY AND EAST CENTRAL LINCOLN
COUNTIES...

At 611 PM CDT, severe thunderstorms were located along a line from 7
miles northeast of Athensville to near Hardin, or along a line from
17 miles west of Virden to 11 miles southeast of Elsberry, moving
east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to
         roofs, siding, and trees.

Locations impacted include...
  Michael, Eldred, Belltown, Hardin, Berdan, Woody, Carrollton,
  Wrights, Athensville, Greenfield, Kane, Fieldon and Old Kane.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds and
large hail.

Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.

&&

LAT...LON 3906 9071 3904 9090 3918 9067 3923 9064
      3933 9056 3941 9043 3952 9026 3952 9015
      3950 9015 3928 9023 3917 9035 3907 9060
TIME...MOT...LOC 2247Z 264DEG 36KT 3951 9039 3920 9070 3908 9091

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Elmore

277 
WWUS53 KLSX 272317
SVSLSX

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

ILC013-061-083-MOC113-272345-
/O.CON.KLSX.SV.W.0110.000000T0000Z-260427T2345Z/
Calhoun IL-Greene IL-Jersey IL-Lincoln MO-
617 PM CDT Mon Apr 27 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
CENTRAL CALHOUN, CENTRAL GREENE, NORTHWESTERN JERSEY AND EAST CENTRAL
LINCOLN COUNTIES...

At 617 PM CDT, severe thunderstorms were located along a line from 7
miles north of Palmyra to 6 miles southeast of Hardin, or along a
line from 13 miles west of Virden to 11 miles west of Jerseyville,
moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to
         roofs, siding, and trees.

Locations impacted include...
  Hardin, Woody, Carrollton, Wrights, Athensville, Greenfield, Kane,
  Fieldon and Old Kane.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds and
large hail.

Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.

A Tornado Watch remains in effect until 900 PM CDT for portions of
southwest Illinois and east central Missouri.

&&

LAT...LON 3906 9071 3904 9090 3918 9066 3934 9037
      3952 9026 3952 9015 3949 9015 3928 9023
      3917 9035 3907 9060
TIME...MOT...LOC 2311Z 265DEG 36KT 3953 9009 3922 9040 3910 9061

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Elmore

904 
WWUS53 KLSX 272321
SVSLSX

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

ILC061-272331-
/O.CAN.KLSX.SV.W.0110.000000T0000Z-260427T2345Z/
Greene IL-
621 PM CDT Mon Apr 27 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR CENTRAL GREENE
COUNTY...

The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM CDT for a portion of
southwest Illinois.

&&

LAT...LON 3906 9071 3904 9090 3913 9064 3913 9061
      3912 9060 3914 9060 3917 9037 3917 9035
      3907 9060
TIME...MOT...LOC 2317Z 265DEG 36KT 3953 9000 3923 9031 3911 9052

$$


ILC013-083-MOC113-272345-
/O.CON.KLSX.SV.W.0110.000000T0000Z-260427T2345Z/
Calhoun IL-Jersey IL-Lincoln MO-
621 PM CDT Mon Apr 27 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
CENTRAL CALHOUN, WEST CENTRAL JERSEY AND EAST CENTRAL LINCOLN
COUNTIES...

At 621 PM CDT, severe thunderstorms were located along a line from
over Old Kane to 6 miles northeast of Winfield, or along a line from
over Jerseyville to 12 miles southeast of Elsberry, moving east at 40
mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to
         roofs, siding, and trees.

Locations impacted include...
  Fieldon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds and
large hail.

Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.

A Tornado Watch remains in effect until 900 PM CDT for portions of
southwest Illinois and east central Missouri.

&&

LAT...LON 3906 9071 3904 9090 3913 9064 3913 9061
      3912 9060 3914 9060 3917 9037 3917 9035
      3907 9060
TIME...MOT...LOC 2317Z 264DEG 36KT 3915 9041 3909 9047 3903 9069

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Elmore

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Apr 27, 5:04 PM CDT, 43 minutes earlier. Its key messages:

While periods of storms are expected through Monday morning, the most potent thunderstorms will occur this afternoon and evening.
Thunderstorms this afternoon and 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, 5:04 PM CDT, 43 minutes before

Area Forecast Discussion
National Weather Service St Louis MO
504 PM CDT Mon Apr 27 2026

.KEY MESSAGES...

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

- Thunderstorms this afternoon and 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 /18Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 456 PM CDT Mon Apr 27 2026

Taking a look across the area, scattered thunderstorms continue
to progress eastwards across central MO this afternoon with an
advancing cold front mainly affecting KUIN, KJEF, and KCOU for
the moment. Expect these developing thunderstorms to move into
the St Louis metro between 5-7 PM this evening promoting mainly
MVFR to IFR cigs and IFR to LIFR vsbys periodically. Otherwise,
southerly to southeasterly winds will become more northwesterly
behind the passing frontal boundary to end the TAF period.

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch until 9 PM CDT this evening for MOZ036-041-042-
     047>052-059>065.
IL...Flood Watch until 9 PM CDT this evening for ILZ058>060-064-065-
     069-070-074-098>102.

&&

SHORT TERM...
LONG TERM...
AVIATION...WFO FSD

Hazardous weather outlook, Apr 27, 2:02 AM CDT, 15 hours 45 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, 4:00 PM CDT, 1 hour 47 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
400 PM CDT Mon Apr 27 2026

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

0355 PM     Hail             1 WNW Mexico            39.17N 91.88W
04/27/2026  E1.50 Inch       Audrain            MO   Public

&&

Local storm report, Apr 27, 4:13 PM CDT, 1 hour 34 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
413 PM CDT Mon Apr 27 2026

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

0410 PM     Hail             3 NW Rush Hill          39.24N 91.78W
04/27/2026  E1.00 Inch       Audrain            MO   Public

            Second round of quarter-sized hail.

&&

Local storm report, Apr 27, 4:43 PM CDT, 1 hour 4 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
443 PM CDT Mon Apr 27 2026

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

0440 PM     Hail             3 NW Rush Hill          39.24N 91.78W
04/27/2026  E1.00 Inch       Audrain            MO   Public

            third round of quarter-sized hail.

&&

Local storm report, Apr 27, 4:46 PM CDT, 1 hour 1 minute before

Preliminary Local Storm Report
National Weather Service St Louis MO
446 PM CDT Mon Apr 27 2026

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

0446 PM     Hail             California              38.63N 92.57W
04/27/2026  E0.70 Inch       Moniteau           MO   Public

&&

Local storm report, Apr 27, 5:13 PM CDT, 34 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
513 PM CDT Mon Apr 27 2026

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

0410 PM     Hail             1 NW Mexico             39.18N 91.88W
04/27/2026  E1.75 Inch       Audrain            MO   Emergency Mngr

            picture received of hail with a quarter for
            reference. Time estimated.

&&

Local storm report, Apr 27, 5:34 PM CDT, 13 minutes before

Preliminary Local Storm Report
National Weather Service St Louis MO
534 PM CDT Mon Apr 27 2026

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

0530 PM     Hail             1 N Winfield            39.01N 90.74W
04/27/2026  E1.00 Inch       Lincoln            MO   Public

&&

MCF

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 6:32 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Washington	43 min
Apr 27, 7:03 AM CDT	Severe Thunderstorm Warning	LSX	Clinton, Marion, Washington	57 min
Apr 27, 7:59 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin, Montgomery	33 min
Apr 27, 8:10 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Adams, Calhoun, Pike	65 min
Apr 27, 8:24 AM CDT	Tornado Warning	LSX	Calhoun, Pike	51 min
Apr 27, 8:57 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Greene, Pike	48 min
Apr 27, 9:03 AM CDT	Tornado Warning	LSX	Greene, Pike	42 min
Apr 27, 9:44 AM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	61 min
Apr 27, 10:29 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	61 min
Apr 27, 10:52 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	42 min
Apr 27, 11:18 AM CDT	Flood Watch	LSX	Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 7 more	10 hr
Apr 27, 12:09 PM CDT	Areal Flood Advisory	LSX	Calhoun	3 hr
Apr 27, 12:27 PM CDT	Tornado Warning	LSX	Madison, Saint Clair	48 min
Apr 27, 1:07 PM CDT	Flash Flood Warning	LSX	Fayette, Montgomery	7 hr
Apr 27, 1:13 PM CDT	Tornado Warning	LSX	Madison	47 min
Apr 27, 1:49 PM CDT	Tornado Warning	LSX	Bond, Madison	14 min
Apr 27, 1:55 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	45 min
Apr 27, 2:01 PM CDT	Tornado Warning	LSX	Madison, Saint Clair	27 min
Apr 27, 2:30 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison	27 min
Apr 27, 3:05 PM CDT	River Flood Warning	LSX	Jackson, Randolph	8 days
Apr 27, 3:13 PM CDT	River Flood Warning	LSX	Pike, Scott	9 days
Apr 27, 3:14 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Madison	46 min
Apr 27, 3:16 PM CDT	River Flood Warning	LSX	Fayette	4 days
Apr 27, 3:19 PM CDT	Tornado Warning	LSX	Calhoun, Jersey, Madison	41 min
Apr 27, 3:46 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	44 min
Apr 27, 3:52 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	38 min
Apr 27, 4:20 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	55 min
Apr 27, 4:34 PM CDT	Tornado Warning	LSX	Adams, Brown	29 min
Apr 27, 4:46 PM CDT	Tornado Warning	LSX	Calhoun, Pike	44 min
Apr 27, 4:52 PM CDT	Flash Flood Warning	LSX	Adams, Pike	4 hr
Apr 27, 5:20 PM CDT	Flash Flood Warning	LSX	Brown, Pike	3 hr
Apr 27, 5:21 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	39 min
Apr 27, 5:27 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene	33 min
Apr 27, 5:32 PM CDT	Flash Flood Warning	LSX	Jersey	5 hr
Apr 27, 5:32 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin	43 min
Apr 27, 5:50 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin	40 min
Apr 27, 5:59 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	46 min
Apr 27, 6:01 PM CDT	Tornado Warning	LSX	Jersey, Macoupin	44 min
Apr 27, 6:09 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin	21 min
Apr 27, 6:28 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Calhoun, Fayette, Jersey, Macoupin, Madison and 1 more	47 min
Apr 27, 6:41 PM CDT	Tornado Warning	LSX	Calhoun, Jersey, Madison	32 min
Apr 27, 6:47 PM CDT	Flash Flood Warning	LSX	Macoupin	5 hr
Apr 26, 8:43 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole, Moniteau	30 min
Apr 26, 10:08 PM CDT	Tornado Warning	LSX	Osage	13 min
Apr 27, 1:06 AM CDT	Severe Thunderstorm Warning	LSX	Crawford	39 min
Apr 27, 2:10 AM CDT	Areal Flood Advisory	LSX	Crawford	3 hr
Apr 27, 2:44 AM CDT	Severe Thunderstorm Warning	LSX	Washington	31 min
Apr 27, 3:08 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Sainte Genevieve, Saint Francois, Washington	52 min
Apr 27, 3:36 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	39 min
Apr 27, 3:41 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	49 min
Apr 27, 4:02 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	24 min
Apr 27, 6:52 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	Knox, Shelby	38 min
Apr 27, 7:35 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Monroe, Shelby	55 min
Apr 27, 7:54 AM CDT	Tornado Warning	LSX	Monroe, Ralls	51 min
Apr 27, 10:09 AM CDT	River Flood Warning	LSX	Osage	24 hr
Apr 27, 10:41 AM CDT	Flash Flood Warning	LSX	Boone, Cole, Moniteau	3 hr
Apr 27, 11:48 AM CDT	Flash Flood Warning	LSX	Audrain, Boone, Callaway, Cole, Moniteau, Montgomery and 1 more	3 hr
Apr 27, 1:25 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis	37 min
Apr 27, 1:51 PM CDT	Areal Flood Advisory	LSX	Montgomery, Warren	3 hr
Apr 27, 2:05 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike, Warren	40 min
Apr 27, 2:13 PM CDT	Areal Flood Advisory	LSX	Saint Louis, City of Saint Louis	3 hr
Apr 27, 2:39 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	51 min
Apr 27, 2:42 PM CDT	River Flood Warning	LSX	Monroe	20 hr
Apr 27, 2:49 PM CDT	Tornado Warning	LSX	Saint Charles, Warren	41 min
Apr 27, 2:54 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	6 days
Apr 27, 2:57 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Moniteau	48 min
Apr 27, 3:25 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway	42 min
Apr 27, 3:37 PM CDT	Flash Flood Warning	LSX	Boone	5 hr
Apr 27, 3:39 PM CDT	River Flood Warning	LSX	Lewis	11 hr
Apr 27, 3:41 PM CDT	River Flood Warning	LSX	Lincoln	24 hr
Apr 27, 3:41 PM CDT	Tornado Warning	LSX	Audrain, Callaway	49 min
Apr 27, 3:43 PM CDT	Severe Thunderstorm Warning	LSX	Boone	62 min
Apr 27, 3:46 PM CDT	Tornado Warning	LSX	Boone	14 min
Apr 27, 3:53 PM CDT	River Flood Warning	LSX	Lincoln	4 days
Apr 27, 3:59 PM CDT	River Flood Warning	LSX	Crawford, Washington	18 hr
Apr 27, 4:00 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Moniteau	60 min
Apr 27, 4:07 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Pike, Ralls	53 min
Apr 27, 4:09 PM CDT	Tornado Warning	LSX	Audrain, Montgomery, Pike, Ralls	51 min
Apr 27, 4:13 PM CDT	Flash Flood Warning	LSX	Audrain	5 hr
Apr 27, 4:29 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole, Moniteau	46 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2026 Severe Thunderstorm Warnings in Missouri, 2026 Every severe thunderstorm warning 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.