Severe Thunderstorm Warning 41, NWS St. Louis, MO

077 
WWUS53 KLSX 041125
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
625 AM CDT Sat Apr 4 2026

MOC186-041135-
/O.CAN.KLSX.SV.W.0041.000000T0000Z-260404T1215Z/
Sainte Genevieve MO-
625 AM CDT Sat Apr 4 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHEASTERN SAINTE
GENEVIEVE COUNTY...

The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled. To report severe weather,
contact your nearest law enforcement agency. They will send your
report to the National Weather Service office.

&&

LAT...LON 3814 9004 3815 9004 3822 9001 3821 8959
      3796 8960 3788 8964 3789 8982 3791 8984
      3789 8987 3789 8996 3793 8997 3795 8993
      3796 8993 3796 8994
TIME...MOT...LOC 1108Z 261DEG 33KT 3804 9005 3800 9001 3791 9003

$$


ILC157-041215-
/O.CON.KLSX.SV.W.0041.000000T0000Z-260404T1215Z/
Randolph IL-
625 AM CDT Sat Apr 4 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 AM CDT FOR
RANDOLPH COUNTY...

At 625 AM CDT, severe thunderstorms were located along a line from 5
miles east of Evansville to over Chester, or along a line from 9
miles southwest of Sparta to over Chester, moving east at 40 mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Ruma, Red Bud, Ellis Grove, Kaskaskia, Evansville, Prairie,
  Chester, New Palestine, Preston, Walsh, Baldwin, Bremen, Blair,
  Houston, Steeleville, Sparta, Percy, Eden, Tilden and Coulterville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

Report severe weather to your nearest law enforcement agency or the
National Weather Service office in St Louis MO.

&&

LAT...LON 3814 9004 3815 9004 3822 9001 3821 8959
      3796 8960 3788 8964 3789 8982 3791 8984
      3789 8987 3789 8996 3793 8997 3795 8993
      3796 8993 3796 8994
TIME...MOT...LOC 1108Z 261DEG 33KT 3804 9005 3800 9001 3791 9003

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

$$

Gosselin

161 
WWUS53 KLSX 041145
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
645 AM CDT Sat Apr 4 2026

ILC157-041215-
/O.CON.KLSX.SV.W.0041.000000T0000Z-260404T1215Z/
Randolph IL-
645 AM CDT Sat Apr 4 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 AM CDT FOR
EASTERN RANDOLPH COUNTY...

At 645 AM CDT, severe thunderstorms were located along a line from 5
miles north of Percy to near Percy, or along a line from 6 miles
southeast of Sparta to 11 miles east of Chester, moving east at 35
mph.

HAZARD...60 mph wind gusts and small hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Bremen, Houston, Blair, Welge, Steeleville, Sparta, Percy, Eden,
  Tilden, Shiloh Hill and Coulterville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

Report severe weather to your nearest law enforcement agency or the
National Weather Service office in St Louis MO.

&&

LAT...LON 3806 8978 3822 8984 3821 8959 3818 8959
      3808 8960 3796 8960 3793 8961 3788 8964
      3789 8980 3792 8980 3801 8976
TIME...MOT...LOC 1125Z 262DEG 29KT 3806 8985 3802 8982 3793 8983

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

$$

Gosselin

799 
WWUS53 KLSX 041154
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
654 AM CDT Sat Apr 4 2026

ILC157-041204-
/O.CAN.KLSX.SV.W.0041.000000T0000Z-260404T1215Z/
Randolph IL-
654 AM CDT Sat Apr 4 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EASTERN RANDOLPH
COUNTY...

The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. To report severe weather,
contact your nearest law enforcement agency. They will send your
report to the National Weather Service office.

&&

LAT...LON 3806 8978 3822 8984 3821 8959 3818 8959
      3808 8960 3796 8960 3793 8961 3788 8964
      3789 8980 3792 8980 3801 8976
TIME...MOT...LOC 1145Z 262DEG 29KT 3808 8964 3804 8961 3796 8963

$$

Gosselin

Area Forecast Discussion
National Weather Service Saint Louis MO
305 AM CDT Sat Apr 4 2026

.KEY MESSAGES...

- Showers and thunderstorms will come to an end from west to east
  this morning.

- Much cooler temperatures will arrive through the day today,
  remaining in place into early next week with a 30 to 60 percent
  chance of a freeze Tuesday morning in northeastern MO/west-
  central IL.

&&

.SHORT TERM...  (Through Late Sunday Afternoon)
Issued at 302 AM CDT Sat Apr 4 2026

A weak QLCS continues eastward across the CWA early this morning,
reaching southeastern, east-central MO and south-central IL. So far,
this QLCS has been slightly outflow dominant in the presence of
modest MLCAPE of 250 to 750 J/kg, which has precluded its ability to
produce damaging winds and tornadoes despite 0-3 km wind shear of
around 30 kt supporting mesovortex generation with northeastward
surges. This QLCS will likely lose much of its character and remain
sub-severe through the rest of the morning hours as instability
continues to gradually decrease and additional showers and weak
thunderstorms across southeastern MO into southwestern IL further
overturns downstream instability.

The QLCS convective line (what is left of it) is on track to exit
the CWA around 9 am, but stratiform rain and rumbles of thunder will
continue through much of the remainder of the morning along/east of
I-44 (MO) and I-55 (IL) until large-scale forcing pulls away and low
levels dry significantly. Additionally, a cold front will shortly
follow the QLCS with strong low-level CAA arriving in its wake and
gusty northwesterly winds of 20 to 30 mph at times. With clouds slow
to clear, dominant CAA will be cooling temperatures into the 40s and
50s F through the morning and early afternoon, approximately 30 F
cooler than 24 hours ago. CAA will continue through tonight with
temperatures in the 30s F by Sunday morning; however, winds will
remain strong enough to lower confidence in more than patchy frost
formation in locations that reach the mid-30s F.

On Sunday, a seasonably cool airmass will firmly be in place as a
surface anticyclone reaches the Mid-Mississippi River Valley during
the afternoon and evening. With strong insolation following
scattering stratocumulus by the afternoon, high temperatures are
forecast to warm into the mid-50s to low 60s F.

Pfahler

&&

.LONG TERM...  (Sunday Night through Friday)
Issued at 302 AM CDT Sat Apr 4 2026

In response to upper-level longwave troughing across the Great
Lakes, upper-level northwesterly flow will prevail over the Mid-
Mississippi River Valley late Sunday through late Tuesday navigated
by multiple shortwave troughs. In this pattern, a cold front will
pass southward through the CWA Monday morning into early afternoon,
providing a reinforcing round of low-level CAA. With differing
arrival times of this CAA, high temperatures along/south of I-70
will generally be in the 60s F and the 50s F to the north, but exact
values will be highly dependent on the timing of the front which
varies slightly in model guidance. This even colder airmass and
nearby anomalously strong surface anticyclone will lead to Monday
night/Tuesday morning featuring the coldest temperatures of the
forecast period with 30 to 60 percent probabilities of sub-32 F in
northeastern MO/west-central IL per the NBM. There is also a signal
for a frontogenetical band of precipitation to develop Monday night
into Tuesday with highest probabilities of measurable precipitation
in ensemble model membership across central and northeastern MO, 60
to 80 percent in 24 hours. With precipitation falling overnight and
the cold airmass, 20 to 40 percent of membership also has some of
this precipitation falling as light snow. These frontogenetical
bands are often difficult to resolve, especially at this time range,
leaving details hard to ascertain at the moment.

Wednesday through the rest of the upcoming work week, upper-level
flow will become quasi-zonal and permit low-level flow to become
southerly with temperatures warming back to above average. As Gulf
of Mexico moisture also eventually returns and potential shortwave
troughs traverse the Mid-Mississippi River Valley, ensemble model
membership with showers and thunderstorms gradually increases late
in the week.

Pfahler

&&

.AVIATION...  (For the 06z TAFs through 06z Saturday Night)
Issued at 1053 PM CDT Fri Apr 3 2026

A band of showers and thunderstorms will continue to move east,
affecting UIN between 07-12Z, COU/JEF between 06-11Z, and the St.
Louis metro TAFs between 08-16Z. The thunderstorms at COU/JEF may
bring wind gusts to 30 knots. A cold front will move across the
area causing winds to shift out of the west-northwest with gust to
20-25 knots. Ceilings will drop to IFR/MVFR with the showers and
thunderstorms before they climb back up to VFR late in the
morning.

Britt

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

WFO LSX

Hazardous Weather Outlook
National Weather Service St Louis MO
306 AM CDT Sat Apr 4 2026

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-050815-
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-
306 AM CDT Sat Apr 4 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.

Thunderstorms are likely this morning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There is a chance of thunderstorms Thursday through Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Pfahler

Preliminary Local Storm Report
National Weather Service St Louis MO
1236 AM CDT Sat Apr 4 2026

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

1231 AM     Tstm Wnd Gst     4 NNE Ashland           38.82N 92.22W
04/04/2026  M56 MPH          Boone              MO   ASOS

            From Columbia Regional Airport.

&&

JPG

Preliminary Local Storm Report
National Weather Service St Louis MO
132 AM CDT Sat Apr 4 2026

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

0122 AM     Tstm Wnd Gst     Williamsburg            38.92N 91.70W
04/04/2026  M42 MPH          Callaway           MO   Mesonet

            Missouri mesonet station.

&&

JPG

Preliminary Local Storm Report
National Weather Service St Louis MO
223 AM CDT Sat Apr 4 2026

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

0222 AM     Tstm Wnd Gst     3 NE Pittsfield         39.64N 90.78W
04/04/2026  M43 MPH          Pike               IL   AWOS

&&

JPG