River Flood Warning 20, NWS St. Louis, MO

112 
WGUS83 KLSX 201537
FLSLSX

Flood Statement
National Weather Service St Louis MO
1037 AM CDT Sun Apr 20 2025

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

  Big River at Byrnesville.

  Kaskaskia River at Carlyle.

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

  Meramec River near Sullivan.

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.

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

&&

MOC099-220345-
/O.EXT.KLSX.FL.W.0022.000000T0000Z-250422T1920Z/
/BYRM7.1.ER.250420T1104Z.250421T0600Z.250421T1920Z.UU/
1037 AM CDT Sun Apr 20 2025

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

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

* WHERE...Big River at Byrnesville.

* WHEN...Until Tuesday afternoon.

* IMPACTS...At 19.0 feet, Dutch Creek Road south of Byrnesville and 
  Byrnesville Road near John McKeever Road north of Byrnesville 
  begin to flood.

* ADDITIONAL DETAILS...
  - At 9:45 AM CDT Sunday the stage was 16.7 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:45 AM CDT Sunday was 16.7 feet.
  - Forecast...The river will rise to 18.6 feet just after
    midnight tonight. It will then fall below flood stage early
    tomorrow afternoon to 13.5 feet Tuesday morning. It will rise
    to 14.4 feet Tuesday evening. It will then fall again and
    remain below flood stage.
  - Flood stage is 16.0 feet.



&&


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

Big River
  Byrnesville  16.0    16.7    17.9  13.5  13.5  9.3   7.5



&&

LAT...LON 3834 9060 3833 9068 3846 9063 3849 9057


$$

MOC055-221-220345-
/O.EXT.KLSX.FL.W.0020.000000T0000Z-250424T0700Z/
/SLLM7.1.ER.250419T2324Z.250421T0000Z.250423T0100Z.UU/
1037 AM CDT Sun Apr 20 2025

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

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

* WHERE...Meramec River near Sullivan.

* WHEN...Until late Wednesday night.

* IMPACTS...At 15.6 feet, The basic loop of the Onondaga Cave State 
  Park campground begins flooding near this height.

* ADDITIONAL DETAILS...
  - At 9:29 AM CDT Sunday the stage was 14.7 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:29 AM CDT Sunday was 14.7 feet.
  - Forecast...The river is expected to rise to a crest of 15.2
    feet this evening. It will then fall below flood stage
    Tuesday evening.
  - Flood stage is 11.0 feet.



&&


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

Meramec River
  Sullivan     11.0    14.7    14.9  12.8  9.8   8.1   7.3



&&

LAT...LON 3801 9122 3807 9126 3816 9116 3828 9110
      3832 9097 3839 9091 3839 9082 3825 9092
      3823 9105 3808 9111


$$

ILC027-220345-
/O.CON.KLSX.FL.W.0002.000000T0000Z-000000T0000Z/
/KCAI2.1.ER.000000T0000Z.250420T0345Z.000000T0000Z.NO/
1037 AM CDT Sun Apr 20 2025

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

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

* WHERE...Kaskaskia River at Carlyle.

* WHEN...Until further notice.

* IMPACTS...At 23.6 feet, Near this height, wastewater treatmeant 
  ponds along the left bank are threatened by floodwaters.

* ADDITIONAL DETAILS...
  - At 10:00 AM CDT Sunday the stage was 22.7 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 10:00 AM CDT Sunday was 22.7 feet.
  - Forecast...The river is expected to rise to a crest of 22.7
    feet this afternoon.
  - Flood stage is 16.5 feet.



&&


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

Kaskaskia River
  Carlyle        16.5    22.7    22.7  22.7  22.7  22.7  22.7



&&

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


$$

MRB

065 
WGUS83 KLSX 210158
FLSLSX

Flood Statement
National Weather Service St Louis MO
858 PM CDT Sun Apr 20 2025

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

  Big River at Byrnesville.

  Meramec River near Sullivan.

  Bourbeuse River at Union.

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.

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

&&

MOC099-221400-
/O.EXT.KLSX.FL.W.0022.000000T0000Z-250422T1836Z/
/BYRM7.1.ER.250420T1104Z.250421T0600Z.250421T1836Z.UU/
858 PM CDT Sun Apr 20 2025

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

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

* WHERE...Big River at Byrnesville.

* WHEN...Until Tuesday afternoon.

* IMPACTS...At 19.0 feet, Dutch Creek Road south of Byrnesville and 
  Byrnesville Road near John McKeever Road north of Byrnesville 
  begin to flood.

* ADDITIONAL DETAILS...
  - At 8:45 PM CDT Sunday the stage was 18.3 feet.
  - Forecast...The river is expected to rise to a crest of 19.0
    feet just after midnight tonight.
  - Flood stage is 16.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Tue   Wed   Thu   Fri   Sat

Big River
  Byrnesville  16.0    18.3    13.3  13.5  9.3   7.5   6.8



&&

LAT...LON 3834 9060 3833 9068 3846 9063 3849 9057


$$

MOC055-221-221400-
/O.EXT.KLSX.FL.W.0020.000000T0000Z-250423T2240Z/
/SLLM7.1.ER.250419T2324Z.250420T1759Z.250422T1640Z.UU/
858 PM CDT Sun Apr 20 2025

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

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

* WHERE...Meramec River near Sullivan.

* WHEN...Until Wednesday afternoon.

* ADDITIONAL DETAILS...
  - At 8:29 PM CDT Sunday the stage was 14.6 feet.
  - Forecast...The river is expected to fall below flood stage
    late Tuesday morning.
  - Flood stage is 11.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Tue   Wed   Thu   Fri   Sat

Meramec River
  Sullivan     11.0    14.6    11.7  8.7   7.5   7.1   6.7



&&

LAT...LON 3801 9122 3807 9126 3816 9116 3828 9110
      3832 9097 3839 9091 3839 9082 3825 9092
      3823 9105 3808 9111


$$

MOC071-221400-
/O.EXT.KLSX.FL.W.0026.250421T0627Z-250423T2000Z/
/UNNM7.1.ER.250421T0627Z.250421T1800Z.250422T1400Z.NO/
858 PM CDT Sun Apr 20 2025

...FLOOD WARNING NOW IN EFFECT FROM LATE TONIGHT TO WEDNESDAY 
AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...Bourbeuse River at Union.

* WHEN...From late tonight to Wednesday afternoon.

* IMPACTS...At 17.0 feet, Flat Creek backs up to Smeltzer's Park.

* ADDITIONAL DETAILS...
  - At 8:30 PM CDT Sunday the stage was 13.3 feet.
  - Forecast...The river is expected to rise above flood stage
    just after midnight tonight to a crest of 16.5 feet early
    tomorrow afternoon.
  - Flood stage is 15.0 feet.



&&


                 Fld   Observed  Forecasts (7:00 am)
Location         Stg    Stage    Tue   Wed   Thu   Fri   Sat

Bourbeuse River
  Union          15.0    13.3    15.3  12.0  7.1   4.6   3.7



&&

LAT...LON 3826 9123 3832 9133 3838 9137 3848 9094
      3842 9087


$$

Gosselin

798 
WGUS83 KLSX 211607
FLSLSX

Flood Statement
National Weather Service St Louis MO
1107 AM CDT Mon Apr 21 2025

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

  Meramec River near Eureka.

  Meramec River at Pacific.

  Meramec River near Sullivan.

  Meramec River at Valley Park.

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.

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

&&

MOC099-189-230415-
/O.EXT.KLSX.FL.W.0030.000000T0000Z-250425T0508Z/
/ERKM7.1.ER.250421T0852Z.250423T0000Z.250423T2308Z.NO/
1107 AM CDT Mon Apr 21 2025

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

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

* WHERE...Meramec River near Eureka.

* WHEN...Until late Thursday night.

* IMPACTS...At 22.0 feet, Willman Road near the Highway 109 bridge 
  becomes inundated and impassable.

* ADDITIONAL DETAILS...
  - At 10:30 AM CDT Monday the stage was 20.1 feet.
  - Forecast...The river is expected to rise to a crest of 22.4
    feet tomorrow evening. It will then fall below flood stage
    Wednesday evening.
  - Flood stage is 19.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Tue   Wed   Thu   Fri   Sat

Meramec River
  Eureka       19.0    20.1    22.1  21.3  15.9  10.5  8.2



&&

LAT...LON 3844 9064 3850 9066 3855 9064 3855 9056
      3850 9056


$$

MOC071-099-230415-
/O.EXT.KLSX.FL.W.0029.000000T0000Z-250425T0112Z/
/PCFM7.1.ER.250421T1642Z.250422T1200Z.250423T1912Z.NO/
1107 AM CDT Mon Apr 21 2025

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

* WHAT...Minor flooding is forecast.

* WHERE...Meramec River at Pacific.

* WHEN...Until Thursday evening.

* IMPACTS...At 17.5 feet, Private road under the Highway F bridge 
  begins flooding near this height.

* ADDITIONAL DETAILS...
  - At 10:30 AM CDT Monday the stage was 14.6 feet.
  - Forecast...The river is expected to rise above flood stage
    late this morning to a crest of 17.4 feet tomorrow morning.
    It will then fall below flood stage early Wednesday
    afternoon.
  - Flood stage is 15.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Tue   Wed   Thu   Fri   Sat

Meramec River
  Pacific      15.0    14.6    17.4  16.1  11.9  6.8   4.3



&&

LAT...LON 3839 9082 3839 9091 3849 9081 3850 9066
      3844 9064 3843 9077


$$

MOC055-221-230415-
/O.EXT.KLSX.FL.W.0020.000000T0000Z-250424T0200Z/
/SLLM7.1.ER.250419T2324Z.250420T1759Z.250422T2000Z.UU/
1107 AM CDT Mon Apr 21 2025

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

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

* WHERE...Meramec River near Sullivan.

* WHEN...Until Wednesday evening.

* IMPACTS...At 13.5 feet, Cave Road begins flooding at Onondaga Cave 
  State Park near this height.

* ADDITIONAL DETAILS...
  - At 10:29 AM CDT Monday the stage was 13.0 feet.
  - Forecast...The river is expected to fall below flood stage
    tomorrow afternoon and continue falling to 6.2 feet Sunday
    morning.
  - Flood stage is 11.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Tue   Wed   Thu   Fri   Sat

Meramec River
  Sullivan     11.0    13.0    11.8  9.3   7.8   7.1   6.7



&&

LAT...LON 3801 9122 3807 9126 3816 9116 3828 9110
      3832 9097 3839 9091 3839 9082 3825 9092
      3823 9105 3808 9111


$$

MOC099-189-230415-
/O.EXT.KLSX.FL.W.0031.250421T2120Z-250425T0632Z/
/VLLM7.1.ER.250421T2120Z.250423T0000Z.250424T0032Z.NO/
1107 AM CDT Mon Apr 21 2025

...FLOOD WARNING NOW IN EFFECT FROM THIS AFTERNOON TO LATE THURSDAY 
NIGHT...

* WHAT...Minor flooding is forecast.

* WHERE...Meramec River at Valley Park.

* WHEN...From this afternoon to late Thursday night.

* IMPACTS...At 19.5 feet, Buder Park and the recreation park at the 
  water plant floods.

* ADDITIONAL DETAILS...
  - At 10:30 AM CDT Monday the stage was 16.8 feet.
  - Forecast...The river is expected to rise above flood stage
    late this afternoon to a crest of 19.8 feet tomorrow evening.
    It will then fall below flood stage Wednesday evening.
  - Flood stage is 18.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Tue   Wed   Thu   Fri   Sat

Meramec River
  Valley Park  18.0    16.8    19.3  19.6  15.7  9.7   5.8



&&

LAT...LON 3850 9056 3855 9056 3857 9047 3856 9043
      3853 9042 3853 9051


$$

Carney

196 
WGUS83 KLSX 220306
FLSLSX

Flood Statement
National Weather Service St Louis MO
1006 PM CDT Mon Apr 21 2025

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

  Meramec River near Eureka.

  Meramec River at Pacific.

  Big River at Byrnesville.

  Meramec River near Sullivan.

  Meramec River near Arnold.

  Meramec River at Valley Park.

  Bourbeuse River at Union.

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.

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

&&

MOC099-189-231515-
/O.EXT.KLSX.FL.W.0030.000000T0000Z-250425T0400Z/
/ERKM7.1.ER.250421T0852Z.250422T1800Z.250423T2200Z.NO/
1006 PM CDT Mon Apr 21 2025

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

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

* WHERE...Meramec River near Eureka.

* WHEN...Until Thursday evening.

* IMPACTS...At 22.0 feet, Willman Road near the Highway 109 bridge 
  becomes inundated and impassable.

* ADDITIONAL DETAILS...
  - At 9:30 PM CDT Monday the stage was 20.9 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:30 PM CDT Monday was 20.9 feet.
  - Forecast...The river is expected to rise to a crest of 21.7
    feet early tomorrow afternoon. It will then fall below flood
    stage Wednesday afternoon.
  - Flood stage is 19.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Wed   Thu   Fri   Sat   Sun

Meramec River
  Eureka       19.0    20.9    20.8  15.7  10.3  8.2   7.2



&&

LAT...LON 3844 9064 3850 9066 3855 9064 3855 9056
      3850 9056


$$

MOC071-099-231515-
/O.EXT.KLSX.FL.W.0029.000000T0000Z-250425T0036Z/
/PCFM7.1.ER.250421T1845Z.250422T1800Z.250423T1836Z.NO/
1006 PM CDT Mon Apr 21 2025

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

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

* WHERE...Meramec River at Pacific.

* WHEN...Until Thursday evening.

* IMPACTS...At 17.0 feet, State Highway AK begins flooding near the 
  intersection with State Highway O near this height.

* ADDITIONAL DETAILS...
  - At 9:30 PM CDT Monday the stage was 15.8 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:30 PM CDT Monday was 15.8 feet.
  - Forecast...The river is expected to rise to a crest of 17.0
    feet early tomorrow afternoon. It will then fall below flood
    stage early Wednesday afternoon.
  - Flood stage is 15.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Wed   Thu   Fri   Sat   Sun

Meramec River
  Pacific      15.0    15.8    15.9  11.7  6.5   4.2   3.1



&&

LAT...LON 3839 9082 3839 9091 3849 9081 3850 9066
      3844 9064 3843 9077


$$

MOC099-231515-
/O.EXT.KLSX.FL.W.0022.000000T0000Z-250424T0055Z/
/BYRM7.1.ER.250420T1104Z.250421T0630Z.250423T0055Z.UU/
1006 PM CDT Mon Apr 21 2025

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

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

* WHERE...Big River at Byrnesville.

* WHEN...Until Wednesday evening.

* IMPACTS...At 18.0 feet, Cedar Hill Road at Cedar Hill and Klondike 
  Road south of Cedar Hill begin to flood near this height.

* ADDITIONAL DETAILS...
  - At 9:45 PM CDT Monday the stage was 16.4 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:45 PM CDT Monday was 17.6 feet.
  - Forecast...The river is expected to rise to a crest of 16.8
    feet early tomorrow afternoon. It will then fall below flood
    stage tomorrow evening.
  - Flood stage is 16.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Wed   Thu   Fri   Sat   Sun

Big River
  Byrnesville  16.0    16.4    13.3  8.7   7.5   6.8   6.3



&&

LAT...LON 3834 9060 3833 9068 3846 9063 3849 9057


$$

MOC055-221-231515-
/O.EXT.KLSX.FL.W.0020.000000T0000Z-250424T0000Z/
/SLLM7.1.ER.250419T2324Z.250420T1759Z.250422T1800Z.UU/
1006 PM CDT Mon Apr 21 2025

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

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

* WHERE...Meramec River near Sullivan.

* WHEN...Until Wednesday evening.

* ADDITIONAL DETAILS...
  - At 9:29 PM CDT Monday the stage was 12.9 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:29 PM CDT Monday was 14.7 feet.
  - Forecast...The river is expected to fall below flood stage
    early tomorrow afternoon.
  - Flood stage is 11.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Wed   Thu   Fri   Sat   Sun

Meramec River
  Sullivan     11.0    12.9    8.9   7.7   7.0   6.7   6.2



&&

LAT...LON 3801 9122 3807 9126 3816 9116 3828 9110
      3832 9097 3839 9091 3839 9082 3825 9092
      3823 9105 3808 9111


$$

MOC099-189-231515-
/O.EXT.KLSX.FL.W.0035.250422T1531Z-250426T0000Z/
/ARNM7.1.ER.250422T1531Z.250423T1200Z.250424T1800Z.NO/
1006 PM CDT Mon Apr 21 2025

...FLOOD WARNING NOW IN EFFECT FROM TUESDAY MORNING TO FRIDAY 
EVENING...

* WHAT...Minor flooding is forecast.

* WHERE...Meramec River near Arnold.

* WHEN...From Tuesday morning to Friday evening.

* IMPACTS...At 26.0 feet, Athletic fields east of I-55 begin 
  flooding near this height.

* ADDITIONAL DETAILS...
  - At 9:30 PM CDT Monday the stage was 20.2 feet.
  - Forecast...The river is expected to rise above flood stage
    late tomorrow morning to a crest of 26.5 feet Wednesday
    morning. It will then fall below flood stage early Thursday
    afternoon.
  - Flood stage is 24.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Wed   Thu   Fri   Sat   Sun

Meramec River
  Arnold       24.0    20.2    26.5  25.2  20.1  15.7  13.4



&&

LAT...LON 3847 9044 3847 9032 3840 9033 3837 9036
      3841 9036 3842 9037 3843 9036 3845 9036
      3845 9041


$$

MOC099-189-231515-
/O.CON.KLSX.FL.W.0031.000000T0000Z-250425T0632Z/
/VLLM7.1.ER.250422T0007Z.250423T0600Z.250424T0032Z.NO/
1006 PM CDT Mon Apr 21 2025

...FLOOD WARNING REMAINS IN EFFECT UNTIL LATE THURSDAY NIGHT...

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

* WHERE...Meramec River at Valley Park.

* WHEN...Until late Thursday night.

* IMPACTS...At 19.5 feet, Buder Park and the recreation park at the 
  water plant floods.

* ADDITIONAL DETAILS...
  - At 9:30 PM CDT Monday the stage was 18.2 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:30 PM CDT Monday was 18.2 feet.
  - Forecast...The river is expected to rise to a crest of 19.6
    feet early Wednesday morning. It will then fall below flood
    stage Wednesday evening.
  - Flood stage is 18.0 feet.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Wed   Thu   Fri   Sat   Sun

Meramec River
  Valley Park  18.0    18.2    19.5  15.7  9.3   5.5   3.9



&&

LAT...LON 3850 9056 3855 9056 3857 9047 3856 9043
      3853 9042 3853 9051


$$

MOC071-231515-
/O.CON.KLSX.FL.W.0026.000000T0000Z-250424T0840Z/
/UNNM7.1.ER.250421T1600Z.250422T1200Z.250423T0240Z.NO/
1006 PM CDT Mon Apr 21 2025

...FLOOD WARNING REMAINS IN EFFECT UNTIL LATE WEDNESDAY NIGHT...

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

* WHERE...Bourbeuse River at Union.

* WHEN...Until late Wednesday night.

* IMPACTS...At 17.0 feet, Flat Creek backs up to Smeltzer's Park.

* ADDITIONAL DETAILS...
  - At 9:30 PM CDT Monday the stage was 15.3 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 9:30 PM CDT Monday was 15.3 feet.
  - Forecast...The river is expected to rise to a crest of 16.0
    feet tomorrow morning. It will then fall below flood stage
    late tomorrow evening.
  - Flood stage is 15.0 feet.



&&


                 Fld   Observed  Forecasts (7:00 am)
Location         Stg    Stage    Wed   Thu   Fri   Sat   Sun

Bourbeuse River
  Union          15.0    15.3    13.5  8.0   4.9   3.8   3.4



&&

LAT...LON 3826 9123 3832 9133 3838 9137 3848 9094
      3842 9087


$$

Britt

869 
WGUS83 KLSX 221454 RRA
FLSLSX

Flood Statement
National Weather Service St Louis MO
954 AM CDT Tue Apr 22 2025

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

  Meramec River near Sullivan.

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

MOC055-221-221600-
/O.CAN.KLSX.FL.W.0020.000000T0000Z-250422T1454Z/
/SLLM7.1.ER.250419T2324Z.250420T1759Z.250422T1329Z.UU/
954 AM CDT Tue Apr 22 2025

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the Meramec River near Sullivan.

* ADDITIONAL DETAILS...
  - At 9:29 AM CDT Tuesday the stage was 10.8 feet.
  - Forecast...The river is expected to fall to 5.4 feet Monday
    morning.



&&


               Fld   Observed  Forecasts (7:00 am)
Location       Stg    Stage    Wed   Thu   Fri   Sat   Sun

Meramec River
  Sullivan     11.0    10.8    8.3   7.0   6.4   6.1   5.7



&&

LAT...LON 3801 9122 3807 9126 3816 9116 3828 9110
      3832 9097 3839 9091 3839 9082 3825 9092
      3823 9105 3808 9111


$$

Carney

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
651 PM CDT Sat Apr 19 2025

.KEY MESSAGES...

- Widespread rain with a few thunderstorms are expected to
  continue through Sunday morning, with the highest chances of
  rain gradually shifting northward with time.

- Widespread thunderstorms are expected to move from west to east
  from late Sunday afternoon through late evening. Some of these
  storms will be severe with large hail, damaging winds, and
  tornadoes.

&&

.SHORT TERM...  (Through Late Sunday Night)
Issued at 223 PM CDT Sat Apr 19 2025

Widespread light to moderate rain along with some embedded
thunderstorms has been the rule today mostly along/southeast of I-44
in Missouri and I-70 in Illinois. This is expected to continue
tonight with persistent weak to moderate low-level moisture
convergence centered around the 850 hPa level beneath weakly
diffluent flow. The axis of rain should gradually shift northward
late tonight into Sunday morning as the surface quasi-stationary
front moves poleward in response to cyclogenesis across the southern
Plains. Thunderstorms are expected to be almost exclusively elevated
and weak in nature, though there may be a brief temporal/spatial
window for some wind gusts to around 60 mph in southeast Missouri
between roughly 0500 and 0800 UTC. This is when the surface front
may wobble far enough north to support a small line segment or two
to produce some minor wind damage. The signal is weaker and less
certain compared to last night however.

Rainfall rates tonight still look to stay mostly on the light to
moderate side, given a lack of a stronger, more organized low-level
jet. Only isolated to scattered convection is expected as well and
precipitable water values closer to the 90th percentile also suggest
more modest rainfall rates (similar to what has been observed over
the past 12-24 hours). Therefore, the flash flood threat still looks
low and isolated at best. Some ponding/nuisance flooding is
certainly possible however given the saturated soils along with some
minor river flooding in the days ahead (most likely along the
Meramec basin and its tributaries).

There remains some uncertainty on how fast/far north the warm front
will get by Sunday afternoon. Most guidance is able to get it just
north of the CWA border, which makes some sense given continued
deepening of the surface low tracking into northwest Missouri. The
NAM is slowest/furthest south and only makes it into parts of
northeast Missouri and west-central Illinois. This seems a bit too
slow/far south given the strength of the incoming wave and its
track. However, a slightly slower, further south placement Sunday
afternoon of the warm front may have some merit due to persistent
rain along/north of the retreating boundary. This can retard the
poleward progress of the boundary. The most likely location of the
warm front is very near the CWA border by 2100 UTC, putting
basically all of the bi-state area within the warm sector. There
remains a pretty strong signal that low clouds will hang around much
of the area into the early-mid afternoon, but eventually lift and
scatter out from south to north. This will allow temperatures to
climb at least into the low 70s, with mid to upper 70s possible in
southeast Missouri and southwest Illinois. Steep midlevel lapse
rates will be in place, so exactly how warm the boundary layer gets
will be key in determining how much instability will be available
ahead of the approaching dryline. Probabilities of at least 500 J/kg
remain very high on the latest HREF (70-100%) over the entire area
with exception of parts of northeast Missouri (Knox county and
vicinity). This area is far enough north and west where the dryline
may approach before the warm front is able to move north of that
area. Odds for at least 1000 J/kg of SBCAPE are in the 40-80% range,
and have ticked up about 10% compared to the last cycle. The amount
of instability will likely help modulate how widespread and high end
the threat will be, but even a lower instability scenario is sure to
produce severe weather in the area tomorrow.

The expectation is for supercells to develop across southeast
Kansas/southwest Missouri along the dryline by early afternoon given
a favorable orientation of the deep-layer shear vector to the
boundary (~45 degrees). A couple of CAMs try to initiate a few
isolated (low topped/mini) supercells further east in our area by
mid afternoon ahead of the dryline, but that does not appear to be a
likely scenario given very weak/negligible surface convergence
within the open warm sector and the stronger mid/upper level forcing
for ascent downstream of the negatively tilted shortwave still well
to the west. The dryline should be making its way into central
Missouri around 2100 UTC. CAMs suggest a transition to a more linear
mode, though some embedded supercells are still possible. The
orientation of the shear vector is still favored for discrete
convection well into the afternoon, though the strength of the
mid/upper level forcing for ascent does argue for a transition to a
more linear mode in time/eastward extent. Capping is pretty weak
tomorrow, and given the strength of the mid/upper level forcing,
convection should be very widespread. This could mean a lot of
competition for individual updrafts, and if mergers tend to be
destructive, may help at least slightly limit how widespread and
significant the severe weather will be tomorrow. This is just a
possible limiting factor however along with lingering low clouds
which would help limit instability at least somewhat. Neither of
these negating factors will eliminate the possibility of severe
weather however given the strong dynamics and near-certainty in at
least modest instability available tomorrow.

All severe threats are expected on Sunday, with large hail more
favored earlier on Sunday and further west where supercells are more
favored. The damaging wind threat likely will increase across
eastern Missouri and western Illinois early Sunday evening. The
tornado threat exists across the entire area, though is most likely
along the path of the triple point and just to the east/southeast of
its track. This is where surface winds will be most backed and low-
level shear/helicity maximized. The tornado threat should continue
at least into the mid/late evening hours. The low-level SRH
maintains itself across the river into Illinois as veering of
surface winds is offset by increasing 1 km flow associated with the
nocturnal low-level jet.

Storms should gradually weaken and lose some organization after 0200-
0300 UTC due to weakening instability after sunset and abating
surface convergence along the dryline and weakening mid/upper level
forcing for ascent. By about 0400-0500 UTC, the dryline itself
should exit off to the east of our area ending any remaining threat.

Gosselin

&&

.LONG TERM...  (Monday through Next Saturday)
Issued at 223 PM CDT Sat Apr 19 2025

(Monday - Monday Night)

A welcome, but short lived period of quiet weather is in store to
start off the next work week as a weak surface ridge of high
pressure moves across the mid-Mississippi Valley. Dry weather with
temperatures near normal (highs mid 60s to low 70s) are expected.

(Tuesday - Next Saturday)

A return to a more active weather pattern with several rounds of
showers and thunderstorms remains possible for mid/late week as
several perturbations move across the area within zonal flow aloft.
Trying to time any one of these features is fruitless at this time,
which is why a prolonged period of mostly chance (30-50%) PoPs
exists Tuesday night through Thursday. There is a more coherent,
stronger signal centered on Friday as both the GEFS/EPS bring a
stronger mid/upper level trough across the Great Lakes with a cold
front moving through our area. The timing of this frontal passage
could shift though given it is still 6 days out, but does look like
the period right now with the best chance of showers and
thunderstorms (60-70%).

The threat for any organized convection and associated severe
weather/flash flooding appears pretty low given the westerlies are
closer to the US-Canadian border. Multiple rounds of showers and
storms could however lead to renewed river flooding given still
moist soils and elevated base flows continuing in some streams.

Temperatures are expected to be above normal next week, especially
at night. There remains some more uncertainty with daily high
temperatures as widespread precipitation/clouds could yield highs at
least several degrees cooler than forecast.

Gosselin

&&

.AVIATION...  (For the 00z TAFs through 00z Sunday Evening)
Issued at 640 PM CDT Sat Apr 19 2025

Light rain over the I-70 corridor continues to gradually weaken,
but coverage is expected to increase again very early tomorrow
morning. Embedded thunder is possible, but confidence in where
exactly this would occur is still too low to mention in the TAFs.
Visibilities where rain occurs are expected to fall to MVFR. Ceilings
will continue to lower tonight in the vicinity of a warm front.
Expect IFR ceilings nearly areawide by Sunday morning with some
LIFR possible. Northeasterly surface winds will increase Sunday
morning before turning southeast behind a warm front. Late in the
period, severe thunderstorms are expected to move through the CWA
from west to east. All hazards are possible including damaging
winds, large hail, and tornadoes. These thunderstorms are expected
to pass quickly, so used my best judgment in timing in the TAFs.

Jaja

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch through late Sunday night for Audrain MO-Boone MO-
     Callaway MO-Cole MO-Crawford MO-Franklin MO-Gasconade MO-
     Iron MO-Jefferson MO-Lincoln MO-Madison MO-Moniteau MO-
     Montgomery MO-Osage MO-Pike MO-Reynolds MO-Saint Charles MO-
     Saint Francois MO-Saint Louis City MO-Saint Louis MO-Sainte
     Genevieve MO-Warren MO-Washington MO.

IL...Flood Watch through late Sunday night for Bond IL-Calhoun IL-
     Clinton IL-Fayette IL-Greene IL-Jersey IL-Macoupin IL-
     Madison IL-Marion IL-Monroe IL-Montgomery IL-Randolph IL-
     Saint Clair IL-Washington IL.

&&

WFO LSX

Hazardous Weather Outlook
National Weather Service St Louis MO
226 PM CDT Sat Apr 19 2025

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-201930-
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-
226 PM CDT Sat Apr 19 2025

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

.DAY ONE...Tonight.

Widespread showers and thunderstorms are expected through tonight.
Locally heavy rainfall is possible. A flood watch remains in effect
across much of the area.

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

Additional rounds of showers and thunderstorms are expected Sunday.
The greatest potential of severe weather will be Sunday afternoon
into late Sunday evening, when hail, damaging winds, and tornadoes
are all possible.

Showers and thunderstorms are possible Tuesday night through
Friday.

Locally heavy rainfall is possible Sunday. Both river flooding and
localized flash flooding remain possible. A flood watch continues
through Sunday evening across much of the area.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report any wind damage, hail, or rainfall
totals above 2" to the National Weather Service.

Gosselin

Preliminary Local Storm Report
National Weather Service St Louis MO
632 PM CDT Sat Apr 19 2025

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

0154 AM     Tstm Wnd Dmg     2 N Saint Libory        38.39N 89.72W
04/19/2025                   St. Clair          IL   Public

            Structural damage to a large shed, RV tipped
            over, and miscellaeous loose debris flung
            into a field.

&&

BRC