Severe Thunderstorm Warning 186, NWS St. Louis, MO

948 
WWUS53 KLSX 302128
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
428 PM CDT Wed Jul 30 2025

MOC093-123-187-302215-
/O.CON.KLSX.SV.W.0186.000000T0000Z-250730T2215Z/
Iron MO-Madison MO-Saint Francois MO-
428 PM CDT Wed Jul 30 2025

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT 
FOR NORTHEASTERN IRON, MADISON AND SOUTHERN SAINT FRANCOIS COUNTIES 
IN SOUTHEASTERN MISSOURI...

At 428 PM CDT, a severe thunderstorm was located 6 miles north of 
Roselle, or 8 miles southwest of Farmington, moving southeast at 20 
mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail
         damage to roofs, siding, windows, and vehicles. Expect
         wind damage to roofs, siding, and trees.

Locations impacted include...
  Farmington, Fredericktown, Bismarck, Ironton, Park Hills, Pilot 
  Knob, Iron Mountain Lake, Arcadia, Junction City, Cobalt, 
  Marquand, Roselle, Knob Lick, Saco, Iron Mountain, Buckhorn, 
  Catherine Place, Mine La Motte, Libertyville and Doe Run.

This includes the following State Parks...
	Fort Davidson Historic Site and Elephant Rocks State Park.

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.

Torrential rainfall is also occurring with this storm and may lead 
to flash flooding. Do not drive your vehicle through flooded 
roadways.

&&

LAT...LON 3754 9077 3774 9068 3773 9065 3780 9064
      3783 9063 3771 9025 3767 9020 3768 9018
      3767 9013 3765 9013 3764 9015 3760 9015
      3754 9014 3749 9014 3739 9015 3731 9015
      3732 9024 3732 9038
TIME...MOT...LOC 2122Z 301DEG 17KT 3770 9054

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Carney

499 
WWUS53 KLSX 302141
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
441 PM CDT Wed Jul 30 2025

MOC093-123-187-302215-
/O.CON.KLSX.SV.W.0186.000000T0000Z-250730T2215Z/
Iron MO-Madison MO-Saint Francois MO-
441 PM CDT Wed Jul 30 2025

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT 
FOR NORTHEASTERN IRON, MADISON AND SOUTHERN SAINT FRANCOIS COUNTIES 
IN SOUTHEASTERN MISSOURI...

At 441 PM CDT, a severe thunderstorm was located near Knob Lick, or 
8 miles south of Farmington, moving southeast at 15 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...
  Farmington, Fredericktown, Bismarck, Ironton, Park Hills, Pilot 
  Knob, Iron Mountain Lake, Arcadia, Junction City, Cobalt, 
  Marquand, Roselle, Knob Lick, Saco, Iron Mountain, Buckhorn, 
  Catherine Place, Mine La Motte, Libertyville and Doe Run.

This includes the following State Parks...
	Fort Davidson Historic Site and Elephant Rocks State Park.

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.

Torrential rainfall is also occurring with this storm and may lead 
to flash flooding. Do not drive your vehicle through flooded 
roadways.

&&

LAT...LON 3754 9077 3774 9068 3773 9065 3780 9064
      3783 9063 3771 9025 3767 9020 3768 9018
      3767 9013 3765 9013 3764 9015 3760 9015
      3754 9014 3749 9014 3739 9015 3731 9015
      3732 9024 3732 9038
TIME...MOT...LOC 2128Z 298DEG 14KT 3770 9052

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

$$

Carney

938 
WWUS53 KLSX 302151
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
451 PM CDT Wed Jul 30 2025

MOC187-302201-
/O.CAN.KLSX.SV.W.0186.000000T0000Z-250730T2215Z/
Saint Francois MO-
451 PM CDT Wed Jul 30 2025

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTHERN SAINT 
FRANCOIS COUNTY...

The storm which prompted the warning has weakened below severe 
limits, and no longer poses an immediate threat to life or property. 
Therefore, the warning has been cancelled. However, gusty winds and 
heavy rain are still possible with this thunderstorm.

&&

LAT...LON 3754 9077 3759 9068 3764 9065 3764 9015
      3760 9015 3754 9014 3745 9014 3739 9015
      3731 9015 3731 9018 3732 9024 3732 9038
TIME...MOT...LOC 2141Z 298DEG 14KT 3767 9047

$$


MOC093-123-302215-
/O.CON.KLSX.SV.W.0186.000000T0000Z-250730T2215Z/
Iron MO-Madison MO-
451 PM CDT Wed Jul 30 2025

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT 
FOR EAST CENTRAL IRON AND MADISON COUNTIES IN SOUTHEASTERN 
MISSOURI...

At 451 PM CDT, a severe thunderstorm was located 7 miles southeast 
of Roselle, or 9 miles west of Fredericktown, moving southeast at 20 
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...
  Fredericktown, Ironton, Pilot Knob, Arcadia, Junction City, 
  Cobalt, Marquand, Saco, Roselle, Buckhorn, Catherine Place, Mine 
  La Motte and Hogan.

This includes the following State Parks...
	Fort Davidson 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.

Torrential rainfall is also occurring with this storm and may lead 
to flash flooding. Do not drive your vehicle through flooded 
roadways.

&&

LAT...LON 3754 9077 3759 9068 3764 9065 3764 9015
      3760 9015 3754 9014 3745 9014 3739 9015
      3731 9015 3731 9018 3732 9024 3732 9038
TIME...MOT...LOC 2141Z 297DEG 18KT 3754 9051

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

$$

Carney

504 
WWUS53 KLSX 302159
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
459 PM CDT Wed Jul 30 2025

MOC093-123-302209-
/O.CAN.KLSX.SV.W.0186.000000T0000Z-250730T2215Z/
Iron MO-Madison MO-
459 PM CDT Wed Jul 30 2025

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR EAST CENTRAL IRON 
AND MADISON COUNTIES IN SOUTHEASTERN MISSOURI...

The storm which prompted the warning has weakened below severe 
limits, and no longer poses an immediate threat to life or property. 
Therefore, the warning has been cancelled. However, gusty winds and 
heavy rain are still possible with this thunderstorm.

&&

LAT...LON 3754 9077 3759 9068 3764 9065 3764 9015
      3760 9015 3754 9014 3745 9014 3739 9015
      3731 9015 3731 9018 3732 9024 3732 9038
TIME...MOT...LOC 2151Z 297DEG 18KT 3751 9045

$$

Carney

Area Forecast Discussion
National Weather Service Saint Louis MO
226 PM CDT Wed Jul 30 2025

.KEY MESSAGES...

- Scattered thunderstorms with gusty winds are expected through
  this evening, mainly in southeast Missouri and southwest
  Illinois.

- Much cooler weather will move into the area tonight and last
  through this weekend.

&&

.SHORT TERM...  (Through Late Thursday Afternoon)
Issued at 223 PM CDT Wed Jul 30 2025

A MCS very gradually weakened all morning, allowing a composite
outflow boundary to progress southeast of the I-44/I-70 corridors
in Missouri and Illinois respectively. Along/southeast of this
boundary will be the focus through early this evening for the
redevelopment of showers and thunderstorms. Some of the stronger
cores may be able to produce wind gusts up to 60 mph in
microbursts across parts of southeast Missouri and southwest
Illinois through about 9 PM this evening.

For the remainder of the night, the synoptic cold front continues to
make gradual progress southward, ushering in much cooler
temperatures to the region. Isolated to widely scattered showers are
possible overnight tonight into Thursday morning, with the best
chances centered in/near the 850-hPa cold front. Behind this
feature, dry weather is expected.

Behind the surface cold front, look for northerly winds to increase
to around 10-15 mph, with widespread low stratus enveloping the
area. Temperatures will struggle to rise much during the day with
increasing low-level cold air advection and the aforementioned
stratus. High temperatures ranging from the mid 70s to low 80s are
forecast from north to south. These temperatures would be nearly 10
degrees below normal and the first time most locations would be
below normal at all in almost 2 weeks.

Gosselin

&&

.LONG TERM...  (Thursday Night through Next Wednesday)
Issued at 223 PM CDT Wed Jul 30 2025

(Thursday Night - Sunday)

A sprawling 1028+ hPa surface high will completely control our
sensible weather through the weekend, providing cool, dry
northeasterly surface flow. Dry weather is favored through the
period along with well-below normal temperatures and low humidity.
What a change compared to the heat and humidity of the past week and
a half. High temperatures are forecast to be in the mid 70s to near
80 degrees with lows in the mid 50s to low 60s. These temperatures
would be about 10 degrees below normal as we cross over from the
month of July to August, and more typical of those of the third week
of September.

(Sunday Night - Next Wednesday)

The mid/upper level pattern begins to change as we head into next
week. Flow aloft turns from northwesterly to more zonal, with a
mid/upper level ridge trying to push out of the intermountain west
into the south-central Plains. This means moderating temperatures,
likely inching closer to normal. In addition, it portends the
return of chances for showers and thunderstorms as a midlevel
shortwave trough moves southeast into the Mississippi Valley
sometime Sunday night through Monday night. There is quite a bit
of spread with the strength and timing of this feature, so PoPs
are not too high quite yet. They generally are in the 20-30%
range, or near normal for early August.

Gosselin

&&

.AVIATION...  (For the 18z TAFs through 18z Thursday Afternoon)
Issued at 1159 AM CDT Wed Jul 30 2025

A composite outflow boundary along with some scattered showers and
storms continues to move east and should be through metro
terminals. This should be completely through by 1900 UTC. There
may be some redevelopment, but the best chances should tend to
focus across southeast Missouri and southwest Illinois. Scattered
showers and possibly a few thunderstorms are expected overnight
tonight into Thursday morning, but there is not much confidence in
where and when the best chances are. Therefore, left TAFs dry for
now. The synoptic cold front will be moving through tonight.
Behind the front, look for a wind shift to the north and lowering
ceilings. MVFR ceilings with bases between 1000 and 2000 feet AGL
are mostly expected then through Thursday morning. There also will
be some IFR ceilings at least for a period of time the further
northwest you go, with KUIN and KCOU having the best chances.

Gosselin

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Extreme Heat Warning until 7 PM CDT this evening for Franklin MO-
     Jefferson MO-Saint Charles MO-Saint Louis City MO-Saint
     Louis MO-Sainte Genevieve MO.

     Heat Advisory until 7 PM CDT this evening for Boone MO-Callaway
     MO-Cole MO-Crawford MO-Gasconade MO-Iron MO-Madison MO-
     Moniteau MO-Montgomery MO-Osage MO-Reynolds MO-Saint
     Francois MO-Warren MO-Washington MO.

IL...Extreme Heat Warning until 7 PM CDT this evening for Bond IL-
     Clinton IL-Madison IL-Marion IL-Monroe IL-Randolph IL-Saint
     Clair IL-Washington IL.

     Heat Advisory until 7 PM CDT this evening for Fayette IL.

&&

WFO LSX

Hazardous Weather Outlook
National Weather Service St Louis MO
228 PM CDT Wed Jul 30 2025

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-311930-
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-
228 PM CDT Wed Jul 30 2025

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

.DAY ONE...Tonight.

Isolated to scattered thunderstorms are forecast tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

There is a chance of thunderstorms Monday and Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Gosselin