River Flood Warning 64, NWS St. Louis, MO

126 
WGUS83 KLSX 200155
FLSLSX

Flood Statement
National Weather Service St Louis MO
855 PM CDT Tue May 19 2026

...The Flood Warning continues for the following rivers in
Missouri...

  Missouri River near Chamois.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor this
developing situation and issue follow up statements as conditions
change.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC027-151-211400-
/O.EXT.KLSX.FL.W.0064.260521T0000Z-260525T1525Z/
/CMSM7.1.ER.260521T0000Z.260523T0000Z.260524T0325Z.NO/
855 PM CDT Tue May 19 2026

...FLOOD WARNING NOW IN EFFECT FROM WEDNESDAY EVENING TO MONDAY
MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...From Wednesday evening to Monday morning.

* IMPACTS...At 17.0 feet, Flood Stage:  Lower lying bottom land
  begins to flood.

* ADDITIONAL DETAILS...
  - At 11:11 AM CDT Tuesday the stage was 11.5 feet.
  - Forecast...The river is expected to rise above flood stage
    tomorrow evening to a crest of 18.9 feet Friday evening. It will
    then fall below flood stage late Saturday evening.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Thu   Fri   Sat   Sun   Mon

Missouri River
 Chamois      17.0    11.5    17.9  18.7  18.5  16.1  MSG



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

Maples

449 
WGUS83 KLSX 201740
FLSLSX

Flood Statement
National Weather Service St Louis MO
1240 PM CDT Wed May 20 2026

...The Flood Warning is extended for the following rivers in
Missouri...

  Missouri River near Chamois.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC027-151-220545-
/O.EXT.KLSX.FL.W.0064.260520T1740Z-260525T2230Z/
/CMSM7.1.ER.260520T1732Z.260523T0600Z.260524T1030Z.NO/
1240 PM CDT Wed May 20 2026

...FLOOD WARNING NOW IN EFFECT FROM THIS AFTERNOON TO MONDAY
AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...From this afternoon to Monday afternoon.

* IMPACTS...At 17.0 feet, Flood Stage:  Lower lying bottom land
  begins to flood.

* ADDITIONAL DETAILS...
  - At noon CDT Tuesday, May 19 the estimated stage was 17.0 feet.
  - Forecast...The river will rise to 18.8 feet early Friday morning.
    It will then fall early Friday afternoon. It will rise to 18.9
    feet Saturday morning. It will then fall below flood stage early
    Sunday morning.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Thu   Fri   Sat   Sun   Mon

Missouri River
 Chamois      17.0    11.5    17.9  18.6  18.9  16.9  15.3



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

Fuchs

778 
WGUS83 KLSX 210144
FLSLSX

Flood Statement
National Weather Service St Louis MO
844 PM CDT Wed May 20 2026

...The Flood Warning is extended for the following rivers in
Missouri...

  Missouri River near Chamois.

  Missouri River at Hermann.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC027-151-221345-
/O.EXT.KLSX.FL.W.0064.000000T0000Z-260526T0130Z/
/CMSM7.1.ER.260520T1732Z.260523T1200Z.260524T1330Z.NO/
844 PM CDT Wed May 20 2026

...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY EVENING...

* WHAT...Minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...Until Monday evening.

* IMPACTS...At 17.0 feet, Flood Stage:  Lower lying bottom land
  begins to flood.

* ADDITIONAL DETAILS...
  - At 11:11 AM CDT Tuesday, May 19 the stage was 11.5 feet.
  - Forecast...The river will rise above flood stage just after
    midnight tonight to 18.4 feet early Friday morning. It will then
    fall early Friday afternoon. It will rise to 18.8 feet Saturday
    morning. It will then fall below flood stage Sunday morning.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue

Missouri River
 Chamois      17.0    11.5    18.3  18.8  17.1  15.6  MSG



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

MOC073-139-221345-
/O.EXT.KLSX.FL.W.0065.260521T1500Z-260525T1200Z/
/HRNM7.1.ER.260521T1500Z.260523T1200Z.260524T0600Z.NO/
844 PM CDT Wed May 20 2026

...FLOOD WARNING NOW IN EFFECT FROM THURSDAY MORNING TO MONDAY
MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Missouri River at Hermann.

* WHEN...From Thursday morning to Monday morning.

* IMPACTS...At 22.3 feet, Southern portions of Old Rock Road and
  Twisters Road south of Rhineland begin flooding near this height.

* ADDITIONAL DETAILS...
  - At 8:30 PM CDT Wednesday the stage was 20.3 feet.
  - Forecast...The river is expected to rise above flood stage late
    tomorrow morning to a crest of 21.9 feet Saturday morning. It
    will then fall below flood stage early Sunday morning.
  - Flood stage is 21.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue

Missouri River
 Hermann      21.0    20.3    21.5  21.9  20.5  18.8  16.2



&&

LAT...LON 3873 9160 3875 9136 3866 9119 3859 9119
      3867 9144 3865 9160


$$

Jaja

078 
WGUS83 KLSX 211701
FLSLSX

Flood Statement
National Weather Service St Louis MO
1201 PM CDT Thu May 21 2026

...The Flood Warning is extended for the following rivers in
Missouri...Illinois...

  Missouri River at Hermann.

  Missouri River near Chamois.

  Bourbeuse River at Union.

  Kaskaskia River at Carlyle.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Motorists should not attempt to drive around barricades or drive cars
through flooded areas.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC073-139-230515-
/O.EXT.KLSX.FL.W.0065.000000T0000Z-260525T1330Z/
/HRNM7.1.ER.260521T1225Z.260522T1200Z.260524T0730Z.NO/
1201 PM CDT Thu May 21 2026

...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Missouri River at Hermann.

* WHEN...Until Monday morning.

* IMPACTS...At 22.3 feet, Southern portions of Old Rock Road and
  Twisters Road south of Rhineland begin flooding near this height.

* ADDITIONAL DETAILS...
  - At 11:30 AM CDT Thursday the stage was 21.4 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 11:30 AM CDT Thursday was 21.4 feet.
  - Forecast...The river will fall to 21.3 feet this afternoon. It
    will then rise to 21.9 feet tomorrow morning. It will fall to
    21.6 feet tomorrow evening. It will then rise to 21.8 feet
    Saturday morning. It will fall below flood stage early Sunday
    morning.
  - Flood stage is 21.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue

Missouri River
 Hermann      21.0    21.4    21.9  21.8  20.7  19.1  16.9



&&

LAT...LON 3873 9160 3875 9136 3866 9119 3859 9119
      3867 9144 3865 9160


$$

MOC027-151-230515-
/O.EXT.KLSX.FL.W.0064.000000T0000Z-260526T0600Z/
/CMSM7.1.ER.260520T1732Z.260522T0600Z.260524T1800Z.NO/
1201 PM CDT Thu May 21 2026

...FLOOD WARNING NOW IN EFFECT UNTIL LATE MONDAY NIGHT...

* WHAT...Minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...Until late Monday night.

* IMPACTS...At 17.0 feet, Flood Stage:  Lower lying bottom land
  begins to flood.

* ADDITIONAL DETAILS...
  - There is no current observed data.
  - Forecast...The river will rise to 18.9 feet tomorrow morning. It
    will then fall tomorrow evening. It will rise to 18.8 feet
    Saturday morning. It will then fall below flood stage early
    Sunday afternoon.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue

Missouri River
 Chamois      17.0    MSG     18.9  18.8  17.4  16.0  13.5



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

MOC071-230515-
/O.EXT.KLSX.FL.W.0063.000000T0000Z-260523T0732Z/
/UNNM7.1.UU.260520T0837Z.260521T1415Z.260522T0132Z.NO/
1201 PM CDT Thu May 21 2026

...FLOOD WARNING NOW IN EFFECT UNTIL LATE FRIDAY NIGHT...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Bourbeuse River at Union.

* WHEN...Until late Friday night.

* ADDITIONAL DETAILS...
  - At 11:30 AM CDT Thursday the stage was 17.5 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 11:30 AM CDT Thursday was 17.7 feet.
  - Forecast...The river is expected to fall below flood stage this
    evening and continue falling to 3.7 feet Thursday, May 28.
  - Flood stage is 15.0 feet.


&&

LAT...LON 3832 9113 3836 9113 3840 9107 3843 9106
      3848 9096 3843 9085 3841 9089 3839 9089
      3839 9092 3843 9093 3837 9101


$$

ILC027-230515-
/O.EXT.KLSX.FL.W.0060.000000T0000Z-260523T0800Z/
/KCAI2.1.ER.260507T1459Z.260512T1800Z.260522T0200Z.NO/
1201 PM CDT Thu May 21 2026

...FLOOD WARNING NOW IN EFFECT UNTIL LATE FRIDAY NIGHT...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Kaskaskia River at Carlyle.

* WHEN...Until late Friday night.

* IMPACTS...At 16.5 feet, Near this height, downstream agricultural
  fields begin flooding.

* ADDITIONAL DETAILS...
  - At 11:30 AM CDT Thursday the stage was 17.0 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 11:30 AM CDT Thursday was 17.2 feet.
  - Forecast...The river is expected to rise to a crest of 17.1 feet
    this afternoon. It will then fall below flood stage late this
    evening.
  - Flood stage is 16.5 feet.



&&


All Times CDT  Fld   Observed  Forecasts (7:00 am)
Location       Stg     Stage   Fri   Sat   Sun   Mon   Tue

Kaskaskia River
 Carlyle       16.5    17.0    16.2  16.2  16.2  16.2  16.2



&&

LAT...LON 3862 8936 3861 8933 3851 8937 3849 8942
      3854 8942


$$

Delia

645 
WGUS83 KLSX 220108
FLSLSX

Flood Statement
National Weather Service St Louis MO
808 PM CDT Thu May 21 2026

...The Flood Warning continues for the following locations along the
Missouri River...

  Missouri River at Hermann.

  Missouri River near Chamois.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Motorists should not attempt to drive around barricades or drive cars
through flooded areas.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC073-139-231315-
/O.EXT.KLSX.FL.W.0065.000000T0000Z-260525T0000Z/
/HRNM7.1.ER.260521T1225Z.260522T1200Z.260523T1800Z.NO/
808 PM CDT Thu May 21 2026

...FLOOD WARNING NOW IN EFFECT UNTIL SUNDAY EVENING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Missouri River at Hermann.

* WHEN...Until Sunday evening.

* IMPACTS...At 22.3 feet, Southern portions of Old Rock Road and
  Twisters Road south of Rhineland begin flooding near this height.

* ADDITIONAL DETAILS...
  - At 7:30 PM CDT Thursday the stage was 21.8 feet.
  - Forecast...The river is expected to rise to a crest of 22.2 feet
    tomorrow morning. It will then fall below flood stage early
    Saturday afternoon.
  - Flood stage is 21.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue   Wed

Missouri River
 Hermann      21.0    21.8    22.2  21.2  20.0  18.9  16.9  13.5



&&

LAT...LON 3873 9160 3875 9136 3866 9119 3859 9119
      3867 9144 3865 9160


$$

MOC027-151-231315-
/O.EXT.KLSX.FL.W.0064.000000T0000Z-260525T2200Z/
/CMSM7.1.ER.260520T1732Z.260522T0600Z.260524T1000Z.NO/
808 PM CDT Thu May 21 2026

...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...Until Monday afternoon.

* ADDITIONAL DETAILS...
  - At 700 PM CDT Thursday, May 19, the estimated stage was 19.2
    feet.
  - Forecast...The river is expected to fall below flood stage early
    Sunday morning and continue falling to 11.7 feet Tuesday evening.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue

Missouri River
 Chamois      17.0    MSG     19.2  18.1  16.9  15.9  13.5



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

Carney

448 
WGUS83 KLSX 221543
FLSLSX

Flood Statement
National Weather Service St Louis MO
1043 AM CDT Fri May 22 2026

...The Flood Warning continues for the following rivers in
Missouri...

  Missouri River at Hermann.

  Missouri River near Chamois.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Motorists should not attempt to drive around barricades or drive cars
through flooded areas.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC073-139-240345-
/O.EXT.KLSX.FL.W.0065.000000T0000Z-260524T2200Z/
/HRNM7.1.ER.260521T1225Z.260522T0630Z.260523T1600Z.NO/
1043 AM CDT Fri May 22 2026

...FLOOD WARNING NOW IN EFFECT UNTIL SUNDAY AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Missouri River at Hermann.

* WHEN...Until Sunday afternoon.

* IMPACTS...At 22.3 feet, Southern portions of Old Rock Road and
  Twisters Road south of Rhineland begin flooding near this height.

* ADDITIONAL DETAILS...
  - At 9:30 AM CDT Friday the stage was 21.8 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 9:30 AM CDT Friday was 22.0 feet.
  - Forecast...The river is expected to rise to a crest of 21.9 feet
    this afternoon. It will then fall below flood stage late tomorrow
    morning.
  - Flood stage is 21.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Sat   Sun   Mon   Tue   Wed

Missouri River
 Hermann      21.0    21.8    21.2  19.7  18.1  15.3  12.9



&&

LAT...LON 3873 9160 3875 9136 3866 9119 3859 9119
      3867 9144 3865 9160


$$

MOC027-151-240345-
/O.EXT.KLSX.FL.W.0064.000000T0000Z-260525T1630Z/
/CMSM7.1.ER.260520T1732Z.260522T1800Z.260524T0430Z.NO/
1043 AM CDT Fri May 22 2026

...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...Until Monday morning.

* IMPACTS...At 17.0 feet, Flood Stage:  Lower lying bottom land
  begins to flood.

* ADDITIONAL DETAILS...
  - At 12:42 PM CDT Thursday the stage was 18.5 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 12:42 PM CDT Thursday was 18.5 feet.
  - Forecast...The river is expected to rise to a crest of 18.8 feet
    this afternoon. It will then fall below flood stage late tomorrow
    evening.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Sat   Sun   Mon   Tue   Wed

Missouri River
 Chamois      17.0    18.5    18.1  16.5  14.8  12.0  9.5



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

Elmore

091 
WGUS83 KLSX 230111
FLSLSX

Flood Statement
National Weather Service St Louis MO
811 PM CDT Fri May 22 2026

...The Flood Warning continues for the Missouri river at the
following locations...

  Missouri River near Chamois.

  Missouri River at Hermann.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Motorists should not attempt to drive around barricades or drive cars
through flooded areas.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC027-151-241315-
/O.EXT.KLSX.FL.W.0064.000000T0000Z-260525T1400Z/
/CMSM7.1.ER.260520T1732Z.260521T1742Z.260524T0200Z.NO/
811 PM CDT Fri May 22 2026

...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...Until Monday morning.

* ADDITIONAL DETAILS...
  - At 12:42 PM CDT Thursday, May 21 the stage was 18.5 feet.
  - Forecast...The river is expected to fall below flood stage late
    tomorrow evening and continue falling to 8.8 feet Wednesday
    evening.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Sat   Sun   Mon   Tue   Wed

Missouri River
 Chamois      17.0    18.5    18.0  16.1  14.1  11.0  9.3



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

MOC073-139-241315-
/O.CON.KLSX.FL.W.0065.000000T0000Z-260524T2200Z/
/HRNM7.1.ER.260521T1225Z.260522T0630Z.260523T1600Z.NO/
811 PM CDT Fri May 22 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL SUNDAY AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Missouri River at Hermann.

* WHEN...Until Sunday afternoon.

* ADDITIONAL DETAILS...
  - At 7:30 PM CDT Friday the stage was 21.6 feet.
  - Forecast...The river is expected to fall below flood stage late
    tomorrow morning and continue falling to 11.7 feet Friday, May
    29.
  - Flood stage is 21.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Sat   Sun   Mon   Tue   Wed   Thu

Missouri River
 Hermann      21.0    21.6    21.2  19.2  17.4  14.4  12.8  12.0



&&

LAT...LON 3873 9160 3875 9136 3866 9119 3859 9119
      3867 9144 3865 9160


$$

Carney

983 
WGUS83 KLSX 231419
FLSLSX

Flood Statement
National Weather Service St Louis MO
919 AM CDT Sat May 23 2026

...The Flood Warning is extended for the following river in
Missouri...

  Missouri River near Chamois.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not attempt to drive around barricades or drive cars
through flooded areas.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC027-151-250230-
/O.EXT.KLSX.FL.W.0064.000000T0000Z-260525T1536Z/
/CMSM7.1.ER.260520T1732Z.260521T1742Z.260524T0336Z.NO/
919 AM CDT Sat May 23 2026

...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Missouri River near Chamois.

* WHEN...Until Monday morning.

* ADDITIONAL DETAILS...
  - At 12:42 PM CDT Thursday, May 21 the stage was 18.5 feet.
  - Forecast...The river is expected to fall below flood stage late
    this evening.
  - Flood stage is 17.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Sun   Mon   Tue   Wed   Thu

Missouri River
 Chamois      17.0    18.5    16.4  13.1  10.7  8.8   8.2



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

Gosselin

524 
WGUS83 KLSX 240133
FLSLSX

Flood Statement
National Weather Service St Louis MO
833 PM CDT Sat May 23 2026

...The Flood Warning is cancelled for the following rivers in
Missouri...

  Missouri River near Chamois.

River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.

MOC027-151-240245-
/O.CAN.KLSX.FL.W.0064.000000T0000Z-260524T0133Z/
/CMSM7.1.ER.260520T1732Z.260521T1742Z.000000T0000Z.NO/
833 PM CDT Sat May 23 2026

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the Missouri River near Chamois.

* ADDITIONAL DETAILS...
  - Although there have been no recent observations, it is estimated
    that the river has fallen just below its 17.0 ft flood stage as
    of 8PM this evening, and it will continue falling.
  - Forecast...The river is expected to continue falling over the
    coming days.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Mon   Tue   Wed   Thu   Fri

Missouri River
 Chamois      17.0    MSG     13.7  11.5  9.2   8.3   MSG



&&

LAT...LON 3864 9198 3871 9185 3873 9160 3865 9160
      3864 9181 3858 9194


$$

Kimble

Area Forecast Discussion...Updated
National Weather Service Saint Louis MO
848 AM CDT Tue May 19 2026

.UPDATE...
Issued at 842 AM CDT Tue May 19 2026

Convective complex continues to nudge southward into Arkansas this
morning with stratiform rain spreading through central Missouri
and occasionally as far east as the Mississippi River. We have
given some consideration to canceling the Flood Watch early as
rainfall rates in the stratiform rain region have been quite
minor. However, some convective redevelopment along the front
noted in southwest Missouri behind the stratiform rain indicates
we can still get some higher rainfall rates if this convection
spreads northeast. So we will maintain the Flood Watch until
expiration at 1PM, but the overall threat is much more limited at
this point than it was yesterday. Latest update to the Day1
Convective Outlook from SPC also has shifted the severe threat
southeast with the idea that the clouds and stratiform rain will
limit instability ahead of the front today until the front arrives
near our southeastern CWA border late this afternoon. This is
consistent with our thinking as well as the severe weather threat
is greatly reduced, with the remaining threat tied to
redevelopment of instability ahead of the front which may take
quite some time considering the clouds and rain this morning.

Kimble

&&

.KEY MESSAGES...

- Showers and thunderstorms continue today with a more limited
  chance of severe thunderstorms or flooding compared to prior
  days.

- Cooler and less humid weather arrives behind today's cold front.
  The next round of more widespread showers and thunderstorms is
  Thursday night into Friday.

&&

.SHORT TERM... (Through Late Tonight)
Issued at 414 AM CDT Tue May 19 2026

Latest analysis of radar imagery reveals a complex of thunderstorms
working its way eastward across the area. Currently (as of 0730z),
the leading edge of this activity is pushing into west-central IL,
east-central MO, and points southwestward toward Springfield MO.
Over the last few hours, this complex has gradually been weakening
with eastward extent, with scattered clusters of convection along
the leading edge, followed by widespread stratiform rain. Nearly all
of this convection is now outflow dominant with a gust front out
ahead of the leading edge producing scattered gusts up to 40mph,
which has generally been tied closely to the stronger convective
clusters. Steepened mid-level lapse rates (8-8.5 degrees C) and a
strong 50kt LLJ are both working to keep convection semi-organized
along portions of the leading edge. As a result, this complex of
thunderstorms will continue to be capable of 30-40mph winds, with
gusts near 50mph possible ahead of stronger convective development
that percolate throughout the morning. The favorable environment
highlighted above for these potential stronger convective segments
is generally along and south of the I-70 corridor.

As these showers and thunderstorms continue to filter into the area
this morning, the threat for flooding will also continue. A majority
if the area received 1-2" of rain yesterday with some locations
getting 3-5", generally along I-70 and about 50 miles to the south.
Locations that experienced these higher end amounts yesterday will
be more susceptible to flooding today. In fact, an additional 1-2"
within a 3hr period today may be enough to lead to flash flooding
for some locations. High resolution guidance varies significantly on
the evolution of showers and thunderstorms today, with the general
consensus that showers and pockets of thunderstorms gradually wane
into the late morning or early afternoon. Given all of the variables
mentioned above, the risk of heavy rainfall has prompted us to
continue the Flash Flood Watch, which is now in effect until this
afternoon. Residents should continue to monitor the latest forecast
and be prepared to seek higher ground if a Flash Flood Warning is
issued for your area.

Latest surface analysis reveals a surface low lifting northeast into
WI, with a cold front stretching southwestward into northwest MO.
This front is modeled by guidance to gradually slide southeast
throughout the morning, approaching northeast MO by late this
morning. Ample low-level CAA and thick stratus behind the front will
mitigate the severe weather threat in the post-frontal airmass.
Uncertainty remains with how quickly the atmosphere will be able to
recover this afternoon/evening. Lingering showers and ample clouds
will lower the severe risk or push the risk further south, while
less showers/clouds would increase the risk and lead to a more
widespread severe storm threat this afternoon/evening. Regardless,
instability and mid-level flow are still forecast to be sufficient
enough to support organized storms with potential for large hail,
and damaging wind gusts. Any lingering outflow boundaries from
convection this morning may serve as areas of focus for thunderstorm
development this afternoon ahead of the cold front.

Peine

&&

.LONG TERM... (Wednesday Morning through Monday)
Issued at 414 AM CDT Tue May 19 2026

Low-level cold air advection along with potential lingering cloud
cover, within the post-frontal airmass, will lead to much cooler
conditions for Wednesday, with highs forecast to be around 10-15
degrees below average. Quasi-zonal flow aloft encompasses the region
through the end of the week, which should allow for a period of dry
conditions until Friday.

By the end of the week, long-range guidance shows a southern stream
shortwave lifting northeast and merging into the downstream end of a
northern stream longwave trough near the Great Plains. Low-level
flow ahead of these features appears to remain easterly, which would
limit moisture return along with rain chances. Regardless, the
evolution of these features leads to the return of rain chances
Thursday night into Friday, with the LREF 6hr probabilities for
accumulated precipitation reaching a widespread 80% on Friday for
the area. Chances for precipitation look to remain limited this
weekend as probabilities stay below 20% for a majority of the area. A
gradual warmup is also forecast as LREF temperature IQRs increase to
temperatures right around climatological normals by next week.

Peine

&&

.AVIATION...  (For the 12z TAFs through 12z Wednesday Morning)
Issued at 654 AM CDT Tue May 19 2026

A broad region of showers with occasional lightning mostly across
MO continues to slide southeastward with the heaviest precipitation
across central/south-central MO. For KCOU/KJEF, showers with
isolated embedded thunderstorms are possible through 16z, while KUIN
and the St. Louis metro terminals should experience on and off
showers through 15-16z. Most of the showers will not impact
visibilities, with the exception of heavier showers/thunderstorms
that may lead to brief MVFR visibilities. There is a low chance
(30%) for isolated thunderstorms this afternoon/evening near and
south of the St. Louis metro, which has led to the inclusion of a
PROB30 group.

Highly variable ceilings accompany the area of showers with
scattered pockets of very low ceilings, around 500ft, underneath the
more broad and consistent 6-10kft cloud deck. A majority of these
scattered ceilings near 500ft have been across central/northeast MO
with more widespread ceilings of this nature to the north and west
near a cold front that is across western MO/southern IA. As this
cold front approaches today, ceilings are forecast to lower at all
terminals with widespread low MVFR/IFR ceilings expected across the
area. Ceilings at below airport minimums are possible, with the best
chance for this at KCOU/KJEF, followed by KUIN, with a low chance
for impacts to this magnitude at the St. Louis metro terminals.
Guidance has continued to indicate that conditions are slow to
improve, with possible impacts from low ceilings lasting into the
day on Wednesday.

Southerly surface winds around 10kts veer to the north behind a cold
front that passes from north to south today with northerly winds
prevailing into tomorrow.

Peine

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch until 1 PM CDT this afternoon for Audrain MO-Boone
     MO-Callaway MO-Cole MO-Crawford MO-Franklin MO-Gasconade MO-
     Jefferson MO-Lincoln MO-Moniteau MO-Monroe MO-Montgomery MO-
     Osage MO-Pike MO-Ralls MO-Saint Charles MO-Saint Louis City
     MO-Saint Louis MO-Warren MO-Washington MO.

IL...Flood Watch until 1 PM CDT this afternoon for Bond IL-Calhoun IL-
     Clinton IL-Fayette IL-Jersey IL-Madison IL-Marion IL-Monroe
     IL-Saint Clair IL-Washington IL.

&&

WFO LSX

Hazardous Weather Outlook
National Weather Service St Louis MO
555 AM CDT Tue May 19 2026

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-201100-
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-
555 AM CDT Tue May 19 2026

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

.DAYS ONE THROUGH SEVEN...Today through Monday.

More detailed information can be accessed at:
https://www.weather.gov/media/lsx/DssPacket.pdf

The Area Forecast Discussion is available at:
https://forecast.weather.gov/
product.php?issuedby=LSX&product=AFD&site=lsx

.KEY MESSAGES...

- Widespread showers and thunderstorms are expected to continue
  this morning with additional rainfall in some locations
  potentially leading to flash flooding.

- A few strong to severe thunderstorms are possible this afternoon
  into early tonight ahead of a cold front. The main hazards are
  large hail and damaging wind gusts.

NOTE: Starting May 29, 2026, this outlook product will be
discontinued. Please see the above products for more detailed
forecast information.

WFO LSX

Preliminary Local Storm Report
National Weather Service St Louis MO
955 AM CDT Tue May 19 2026

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

0700 PM     Rain             Washington              38.56N 91.01W
05/18/2026  M4.00 Inch       Franklin           MO   Trained Spotter

            Total from 7 am to 7 pm on 5/18.

&&

Pfahler