Severe Thunderstorm Warning 200, NWS St. Louis, MO

043 
WWUS53 KLSX 041944
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
244 PM CDT Sat Jul 4 2026

MOC019-027-051-151-042030-
/O.CON.KLSX.SV.W.0200.000000T0000Z-260704T2030Z/
Boone MO-Callaway MO-Cole MO-Osage MO-
244 PM CDT Sat Jul 4 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
SOUTH CENTRAL BOONE, SOUTHERN CALLAWAY, COLE AND OSAGE COUNTIES...

At 244 PM CDT, severe thunderstorms were located along a line from
near Jefferson City to 22 miles south of St. Thomas, or along a line
from near Jefferson City to 35 miles southwest of Linn, moving east
at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable
         tree damage. Wind damage is also likely to mobile homes,
         roofs, and outbuildings.

Locations impacted include...
  Brazito, Jefferson City, St. Thomas, Meta, Wardsville, Holts
  Summit, Taos, Lake Mykee Town, Lake Mykee, New Bloomfield, Argyle,
  Westphalia, Freeburg, Loose Creek, Bonnots Mill, Rich Fountain,
  Linn, Mokane and Chamois.

Those attending Salute To America in Jefferson City are also in the
path of these storms and should prepare for IMMINENT DANGEROUS
WEATHER CONDITIONS. SEEK SHELTER NOW!

This includes the following State Parks...
Clarks Hill/Norton Historic Site and Jefferson Landing Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. These storms are capable of producing
widespread damaging winds and large hail.

&&

LAT...LON 3875 9227 3874 9165 3829 9164 3829 9220
      3834 9219 3832 9225 3834 9229 3834 9232
      3849 9237 3860 9231
TIME...MOT...LOC 1915Z 271DEG 31KT 3859 9245 3834 9241 3806 9250

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

LE

245 
WWUS53 KLSX 042000
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
300 PM CDT Sat Jul 4 2026

MOC019-042010-
/O.CAN.KLSX.SV.W.0200.000000T0000Z-260704T2030Z/
Boone MO-
300 PM CDT Sat Jul 4 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR SOUTH CENTRAL BOONE
COUNTY...

The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled. However, heavy rain is
still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for a
portion of central Missouri.

&&

LAT...LON 3864 9221 3874 9218 3875 9218 3874 9165
      3845 9164 3829 9164 3829 9220 3831 9220
      3834 9219 3838 9223 3848 9222 3859 9223
TIME...MOT...LOC 1944Z 272DEG 31KT 3858 9212 3833 9208 3805 9218

$$


MOC027-051-151-042030-
/O.CON.KLSX.SV.W.0200.000000T0000Z-260704T2030Z/
Callaway MO-Cole MO-Osage MO-
300 PM CDT Sat Jul 4 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
SOUTHERN CALLAWAY, SOUTHEASTERN COLE AND OSAGE COUNTIES...

At 300 PM CDT, severe thunderstorms were located along a line from 9
miles northwest of Linn to 19 miles south of Freeburg, or along a
line from 9 miles northwest of Linn to 31 miles south of Linn, moving
east at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Trained spotters reported.

IMPACT...Hail damage to vehicles is expected. Expect considerable
         tree damage. Wind damage is also likely to mobile homes,
         roofs, and outbuildings.

Locations impacted include...
  Jefferson City, St. Thomas, Meta, Wardsville, Holts Summit, Taos,
  Lake Mykee Town, Lake Mykee, New Bloomfield, Argyle, Westphalia,
  Freeburg, Loose Creek, Bonnots Mill, Rich Fountain, Frankenstein,
  Linn, Mokane and Chamois.


This includes the following State Parks...
Clarks Hill/Norton Historic Site and Jefferson Landing Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. These storms have produced widespread
damaging winds and are capable of producing large hail.

&&

LAT...LON 3864 9221 3874 9218 3875 9218 3874 9165
      3845 9164 3829 9164 3829 9220 3831 9220
      3834 9219 3838 9223 3848 9222 3859 9223
TIME...MOT...LOC 1944Z 272DEG 31KT 3858 9212 3833 9208 3805 9218

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

LE

350 
WWUS53 KLSX 042014
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
314 PM CDT Sat Jul 4 2026

MOC027-051-151-042030-
/O.CON.KLSX.SV.W.0200.000000T0000Z-260704T2030Z/
Callaway MO-Cole MO-Osage MO-
314 PM CDT Sat Jul 4 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR
SOUTHEASTERN CALLAWAY, EAST CENTRAL COLE AND OSAGE COUNTIES...

At 314 PM CDT, severe thunderstorms were located along a line from 6
miles north of Linn to 19 miles south of Freeburg, or along a line
from 6 miles north of Linn to 26 miles west of Cuba, moving east at
35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Trained spotters reported.

IMPACT...Hail damage to vehicles is expected. Expect considerable
         tree damage. Wind damage is also likely to mobile homes,
         roofs, and outbuildings.

Locations impacted include...
  Schubert, Osage City, Westphalia, Freeburg, Loose Creek, Tebbetts,
  Bonnots Mill, Rich Fountain, Frankenstein, Linn, Mokane, Steedman,
  Chamois and Portland.


This includes the following State Parks...
Clarks Hill/Norton Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. These storms have produced widespread
damaging winds and are capable of producing large hail.

&&

LAT...LON 3856 9206 3864 9206 3875 9200 3874 9165
      3852 9164 3829 9164 3829 9201 3845 9205
TIME...MOT...LOC 2000Z 272DEG 31KT 3858 9197 3833 9194 3805 9203

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

$$

LE

209 
WWUS53 KLSX 042023
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
323 PM CDT Sat Jul 4 2026

MOC027-051-151-042033-
/O.EXP.KLSX.SV.W.0200.000000T0000Z-260704T2030Z/
Callaway MO-Cole MO-Osage MO-
323 PM CDT Sat Jul 4 2026

...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 330 PM CDT FOR
SOUTHEASTERN CALLAWAY, EAST CENTRAL COLE AND OSAGE COUNTIES...

The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However, heavy rain
is still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for a
portion of central Missouri.

&&

LAT...LON 3856 9206 3864 9206 3875 9200 3874 9165
      3852 9164 3829 9164 3829 9201 3845 9205
TIME...MOT...LOC 2014Z 272DEG 31KT 3857 9182 3832 9178 3805 9187

$$

LE

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
107 PM CDT Sat Jul 4 2026

.KEY MESSAGES...

- Dangerously hot and humid conditions with heat index values
  from around 100-105 continue today. Heat Advisories and an
  Extreme Heat Warning remain in effect until 800 PM.

- There is a chance for thunderstorms today and tonight. Some
  storms may be strong to severe and capable of producing 50-60
  mph winds as well as hail up to 1 inch in diameter and locally
  heavy downpours.

- The chance for showers and thunderstorms continues into early
  next week, with temperatures closer to normal in the mid 80s to
  around 90.

&&

.SHORT TERM...  (Through Late Tonight)
Issued at 343 AM CDT Sat Jul 4 2026

Convective trends are very difficult to forecast today. Clusters
of thunderstorms over northwest Missouri and central Illinois are
pushing outflow boundaries east and south respectively. More
convection may continue to pop up over central Missouri as well,
which will reinforce the boundary if it gets strong enough. Either
boundary is a potential focus for thunderstorm development today,
and the boundaries could collide which would also be a great
forcing mechanism for convective development.

Clouds from morning convection that linger into the afternoon and/or
continuing scattered afternoon convection would almost certainly
suppress temperatures and end the excessive heat today. However,
timing and coverage is uncertain given the complex interactions
which will take place today.  If coverage remains limited this
morning, temperatures could easily recover to reach heat index
values between 95-105. While this isn't as hot as earlier in the
week, the duration of this heat wave continues to support the
current headlines, particularly since there will be a lot of people
outside for Independence Day celebrations. GFS and RAP show 2000-
4000 J/Kg CAPE developing this afternoon with as much as 25kts of
deep layer shear.  This would support multi-cell clusters with the
potential to produce damaging winds.  Think the chance for
thunderstorms will generally decrease in the evening with loss of
daytime heating, but there will still be a lingering thunderstorm
threat to Independence Day celebrations beyond sunset.

Carney

&&

.LONG TERM...  (Sunday through Friday)
Issued at 343 AM CDT Sat Jul 4 2026

There's little change to the remainder of the forecast for Sunday
through next Friday.  A short wave digs into the Mississippi Valley
Sunday which pushes a weak cold front through the area.  Global
guidance members diverge somewhat Monday in how they handle the
wave.  The GFS digs the base of the trough deep into the Lower
Mississippi Valley where it fractures late Tuesday leaving a cut off
low over eastern Texas/western Louisiana.  The ECMWF begins this
process much earlier on Monday night which puts the cut off low
farther north over Oklahoma and Arkansas.  The more northern
solution seems to be favored by the NBM and the LREF mean which are
keeping precipitation chances going at least through Tuesday as the
closed low moves slowly northeast and is finally reintegrated into
the mean flow.  While there's a relatively dry period on Wednesday,
precipitation chances return Thursday and Friday as another short
wave moves across the Mid Mississippi Valley.  Temperatures through
the period should be closer to seasonal normal as upper level long
wave ridging will remain well west of the area.

Carney

&&

.AVIATION...  (For the 18z TAFs through 18z Sunday Afternoon)
Issued at 1255 PM CDT Sat Jul 4 2026

There is a threat for multiple rounds of thunderstorms at all of
the local terminals through the TAF period. Isolated to scattered
showers and storms are in the broader vicinity of all local
terminals except for KUIN, with these posing a threat for early in
the period. Our attention then turns to a cluster of storms moving
eastward out of western Missouri and a cold front sinking
southward into the region late this afternoon and evening.
Both will serve as a focus for a greater threat of thunderstorms
capable of erratic, gusty winds and heavy rainfall. Confidence is
low on the timing of these stronger storms, so chances have been
left to PROB30 groups for now. Once confidence increases, TEMPO or
prevailing groups will be needed for some of the terminals. A lull
in rain chances is expected tonight, with a low chance for showers
and thunderstorms again late in the period tomorrow.

Elmore

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Heat Advisory until 8 PM CDT this evening for Audrain MO-
     Crawford MO-Iron MO-Knox MO-Lewis MO-Lincoln MO-Madison MO-
     Marion MO-Monroe MO-Pike MO-Ralls MO-Reynolds MO-Saint
     Francois MO-Shelby MO-Washington MO.

     Extreme Heat Warning until 8 PM CDT this evening for Boone MO-
     Callaway MO-Cole MO-Franklin MO-Gasconade MO-Jefferson MO-
     Moniteau MO-Montgomery MO-Osage MO-Saint Charles MO-Saint
     Louis City MO-Saint Louis MO-Sainte Genevieve MO-Warren MO.

IL...Heat Advisory until 8 PM CDT this evening for Adams IL-Bond IL-
     Brown IL-Calhoun IL-Fayette IL-Greene IL-Jersey IL-Macoupin
     IL-Marion IL-Montgomery IL-Pike IL.

     Extreme Heat Warning until 8 PM CDT this evening for Clinton IL-
     Madison IL-Monroe IL-Randolph IL-Saint Clair IL-Washington
     IL.

&&

WFO LSX