Alert archive / Missouri / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 124, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 2026, 7:27 PM CDT for Crawford County, Washington County, Missouri. It was in force for 48 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, 7:27 PM CDT (00:27 UTC)
- Expired
- Apr 27, 2026, 8:15 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Crawford County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 00:27 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 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
Springfield, MO (KSGF), launched 00:00Z, 0.5 hours before the alert went out and 264 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
- 597 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1578 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.1
The text
As transmitted.
388
WUUS53 KLSX 280027
SVRLSX
MOC055-221-280115-
/O.NEW.KLSX.SV.W.0124.260428T0027Z-260428T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
727 PM CDT Mon Apr 27 2026
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southeastern Crawford County in east central Missouri...
Southern Washington County in east central Missouri...
* Until 815 PM CDT.
* At 727 PM CDT, a severe thunderstorm was located 6 miles northwest
of Courtois, or 15 miles southeast of Steelville, 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.
* This severe thunderstorm will be near...
Courtois around 735 PM CDT.
Other locations impacted by the severe thunderstorm include
Davisville, Dillard, Shirley, Belgrade and Caledonia.
This includes the following State Parks...
Dillard Mill Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is 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 a portion of
east central Missouri.
&&
LAT...LON 3770 9131 3779 9131 3790 9132 3803 9064
3773 9065 3774 9076 3773 9084 3773 9089
3774 9098 3774 9115 3770 9115
TIME...MOT...LOC 0027Z 265DEG 34KT 3782 9117
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Jaja3 follow-up statements
178
WWUS53 KLSX 280046
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
746 PM CDT Mon Apr 27 2026
MOC055-280056-
/O.CAN.KLSX.SV.W.0124.000000T0000Z-260428T0115Z/
Crawford MO-
746 PM CDT Mon Apr 27 2026
...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTHEASTERN CRAWFORD
COUNTY...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for a portion of
east central Missouri.
&&
LAT...LON 3794 9110 3803 9064 3774 9065 3774 9079
3773 9085 3774 9088 3773 9089 3774 9098
3774 9110
TIME...MOT...LOC 0027Z 265DEG 34KT 3782 9116
$$
MOC221-280115-
/O.CON.KLSX.SV.W.0124.000000T0000Z-260428T0115Z/
Washington MO-
746 PM CDT Mon Apr 27 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
At 746 PM CDT, a severe thunderstorm was located 9 miles northeast of
Courtois, or 11 miles southwest of Potosi, 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.
This severe thunderstorm will be near...
Potosi around 800 PM CDT.
Mineral Point around 805 PM CDT.
Other locations impacted by the severe thunderstorm include Shirley,
Belgrade and Caledonia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is 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 a portion of
east central Missouri.
&&
LAT...LON 3794 9110 3803 9064 3774 9065 3774 9079
3773 9085 3774 9088 3773 9089 3774 9098
3774 9110
TIME...MOT...LOC 0027Z 265DEG 34KT 3782 9116
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Jaja122
WWUS53 KLSX 280103 RRA
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
803 PM CDT Mon Apr 27 2026
MOC221-280115-
/O.CON.KLSX.SV.W.0124.000000T0000Z-260428T0115Z/
Washington MO-
803 PM CDT Mon Apr 27 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
At 803 PM CDT, a severe thunderstorm was located over Irondale, or 7
miles southeast of Potosi, moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe thunderstorm will be near...
Potosi and Mineral Point around 805 PM CDT.
Irondale around 810 PM CDT.
Other locations impacted by the severe thunderstorm include
Caledonia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.
Tornadoes can develop quickly from severe thunderstorms. Seek shelter
immediately in an interior room on the lowest floor of a well-built
structure.
&&
LAT...LON 3774 9110 3799 9064 3795 9064 3774 9065
3774 9082 3773 9085 3773 9086 3774 9088
3773 9089 3774 9098
TIME...MOT...LOC 0046Z 265DEG 34KT 3784 9094
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Jaja223
WWUS53 KLSX 280114
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
814 PM CDT Mon Apr 27 2026
MOC221-280124-
/O.EXP.KLSX.SV.W.0124.000000T0000Z-260428T0115Z/
Washington MO-
814 PM CDT Mon Apr 27 2026
...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 815 PM CDT FOR SOUTHERN
WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...
The Severe Thunderstorm Warning that was previously in effect has
been upgraded to a Tornado Warning. Please refer to that bulletin for
the latest information on this dangerous weather situation.
A Tornado Watch remains in effect until 900 PM CDT for a portion of
east central Missouri.
&&
LAT...LON 3774 9110 3799 9064 3795 9064 3774 9065
3774 9082 3773 9085 3773 9086 3774 9088
3773 9089 3774 9098
TIME...MOT...LOC 0103Z 265DEG 34KT 3785 9072
$$
JajaWhat 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, 6:54 PM CDT, 33 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, 33 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 LSXHazardous weather outlook, Apr 27, 2:02 AM CDT, 17 hours 25 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, 7:16 PM CDT, 11 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
716 PM CDT Mon Apr 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0715 PM Hail Litchfield 39.17N 89.66W
04/27/2026 E1.50 Inch Montgomery IL Emergency Mngr
&&Local storm report, Apr 27, 7:17 PM CDT, 10 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
717 PM CDT Mon Apr 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0717 PM Tstm Wnd Gst 1 WSW Arnold 38.42N 90.38W
04/27/2026 E60 MPH Jefferson MO Broadcast Media
on I-55 near Arnold.
&&Local storm report, Apr 27, 7:20 PM CDT, 7 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
720 PM CDT Mon Apr 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0711 PM Tstm Wnd Dmg Saint Ann 38.73N 90.38W
04/27/2026 St. Louis MO Public
8-inch diameter trees downed onto cars.
&&Local storm report, Apr 27, 7:24 PM CDT, 3 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
724 PM CDT Mon Apr 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0718 PM Tstm Wnd Gst Arnold 38.43N 90.37W
04/27/2026 E60 MPH Jefferson MO Trained Spotter
&&
CarneyLocal storm report, Apr 27, 7:25 PM CDT, 2 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
725 PM CDT Mon Apr 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0725 PM Hail 1 NW Kuhn 38.80N 89.90W
04/27/2026 M1.00 Inch Madison IL Public
&&Local storm report, Apr 27, 7:26 PM CDT, 1 minute before
Preliminary Local Storm Report
National Weather Service St Louis MO
726 PM CDT Mon Apr 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0710 PM Hail Bethalto 38.90N 90.05W
04/27/2026 E1.25 Inch Madison IL Amateur Radio
&&The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:09 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 51 min |
| Apr 27, 7:12 PM CDT | Severe Thunderstorm Warning | LSX | City of Saint Louis | 63 min |
| Apr 27, 7:34 PM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 102 min |
| Apr 27, 8:00 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 25 min |
| Apr 27, 8:03 PM CDT | Tornado Warning | LSX | Sainte Genevieve, Saint Francois, Washington | 29 min |
| Apr 27, 8:05 PM CDT | Tornado Warning | LSX | Reynolds | 40 min |
| Apr 27, 8:31 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois | 32 min |
| Apr 27, 10:37 PM CDT | River Flood Warning | LSX | Marion | 37 hr |
| Apr 27, 10:37 PM CDT | River Flood Warning | LSX | Marion | 56 hr |
| Apr 28, 3:13 AM CDT | River Flood Warning | LSX | Cole | 41 hr |
| Apr 28, 11:38 AM CDT | River Flood Warning | LSX | Saint Charles | 6 days |
| Apr 28, 11:38 AM CDT | River Flood Warning | LSX | Jefferson | 4 days |
| Apr 28, 11:38 AM CDT | River Flood Warning | LSX | Saint Charles | 5 days |
| Apr 28, 11:38 AM CDT | River Flood Warning | LSX | Saint Louis, City of Saint Louis | 5 days |
| Apr 28, 2:18 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 12 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2026Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.