Alert archive / Missouri / River Flood Warnings in 2025
River Flood Warning 29, NWS St. Louis, MO
NWS St. Louis, MO issued this river flood warning at Apr 20, 2025, 8:57 PM CDT for Franklin County, Jefferson County, Missouri. It took effect at Apr 21, 2025, 7:00 AM CDT. It was in force for 50 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 20, 2025, 8:57 PM CDT (01:57 UTC)
- In effect from
- Apr 21, 2025, 7:00 AM CDT
- Expired
- Apr 23, 2025, 8:41 AM CDT
- In force
- 50 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- Minor
Counties Franklin County, MO, Jefferson County, MO
The radar
The St Louis radar (KLSX), 31 km from the middle of the area, began a volume at 02:01 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The river
Written for the forecast point Meramec River near Pacific (PCFM7). The gauge peaked at 16.46 ft at Apr 22, 2025, 9:00 AM CDT.
- Action stage
- 13 ft
- Minor stage
- 15 ft
- Moderate stage
- 23 ft
- Major stage
- 27 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 07017020, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted.
029
WGUS43 KLSX 210157
FLWLSX
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service St Louis MO
857 PM CDT Sun Apr 20 2025
...The National Weather Service in St Louis has issued a Flood
Warning for the following river in Missouri...
Meramec River near Eureka.
Meramec River at Pacific.
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.
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
&&
MOC099-189-221400-
/O.NEW.KLSX.FL.W.0030.250421T1200Z-250425T0500Z/
/ERKM7.1.ER.250421T1200Z.250423T0000Z.250423T2308Z.NO/
857 PM CDT Sun Apr 20 2025
...FLOOD WARNING IN EFFECT FROM MONDAY MORNING TO LATE THURSDAY
NIGHT...
* WHAT...Minor flooding is forecast.
* WHERE...Meramec River near Eureka.
* WHEN...From Monday morning to late Thursday night.
* IMPACTS...At 22.0 feet, Willman Road near the Highway 109 bridge
becomes inundated and impassable.
* ADDITIONAL DETAILS...
- At 8:30 PM CDT Sunday the stage was 17.0 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow morning to a crest of 21.8 feet Tuesday 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 17.0 21.2 21.2 15.7 10.2 8.2
&&
LAT...LON 3844 9064 3850 9066 3855 9064 3855 9056
3850 9056
$$
MOC071-099-221400-
/O.NEW.KLSX.FL.W.0029.250421T1200Z-250424T2300Z/
/PCFM7.1.ER.250421T1200Z.250422T1200Z.250423T1724Z.NO/
857 PM CDT Sun Apr 20 2025
...FLOOD WARNING IN EFFECT FROM MONDAY MORNING TO THURSDAY EVENING...
* WHAT...Minor flooding is forecast.
* WHERE...Meramec River at Pacific.
* WHEN...From Monday morning to Thursday evening.
* IMPACTS...At 18.0 feet, The left bank begins to overflow.
* ADDITIONAL DETAILS...
- At 8:30 PM CDT Sunday the stage was 12.0 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow morning to a crest of 17.8 feet Tuesday morning.
- Flood stage is 15.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Tue Wed Thu Fri Sat
Meramec River
Pacific 15.0 12.0 17.8 15.9 11.4 6.4 4.2
&&
LAT...LON 3839 9082 3839 9091 3849 9081 3850 9066
3844 9064 3843 9077
$$
MOC099-189-221400-
/O.NEW.KLSX.FL.W.0031.250422T0000Z-250425T0700Z/
/VLLM7.1.ER.250422T0000Z.250423T0600Z.250424T0032Z.NO/
857 PM CDT Sun Apr 20 2025
...FLOOD WARNING IN EFFECT FROM MONDAY EVENING TO LATE THURSDAY
NIGHT...
* WHAT...Minor flooding is forecast.
* WHERE...Meramec River at Valley Park.
* WHEN...From Monday evening to late Thursday night.
* IMPACTS...At 19.5 feet, Buder Park and the recreation park at the
water plant floods.
* ADDITIONAL DETAILS...
- At 8:30 PM CDT Sunday the stage was 13.6 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow evening to a crest of 19.4 feet early Wednesday
morning.
- 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 13.6 18.8 19.3 15.7 9.6 5.9
&&
LAT...LON 3850 9056 3855 9056 3857 9047 3856 9043
3853 9042 3853 9051
$$
Gosselin5 follow-up statements
798
WGUS83 KLSX 211607
FLSLSX
Flood Statement
National Weather Service St Louis MO
1107 AM CDT Mon Apr 21 2025
...The Flood Warning is extended for the following rivers in
Missouri...
Meramec River near Eureka.
Meramec River at Pacific.
Meramec River near Sullivan.
Meramec River at Valley Park.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions change.
This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx
&&
MOC099-189-230415-
/O.EXT.KLSX.FL.W.0030.000000T0000Z-250425T0508Z/
/ERKM7.1.ER.250421T0852Z.250423T0000Z.250423T2308Z.NO/
1107 AM CDT Mon Apr 21 2025
...FLOOD WARNING NOW IN EFFECT UNTIL LATE THURSDAY NIGHT...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Meramec River near Eureka.
* WHEN...Until late Thursday night.
* IMPACTS...At 22.0 feet, Willman Road near the Highway 109 bridge
becomes inundated and impassable.
* ADDITIONAL DETAILS...
- At 10:30 AM CDT Monday the stage was 20.1 feet.
- Forecast...The river is expected to rise to a crest of 22.4
feet tomorrow evening. It will then fall below flood stage
Wednesday evening.
- Flood stage is 19.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Tue Wed Thu Fri Sat
Meramec River
Eureka 19.0 20.1 22.1 21.3 15.9 10.5 8.2
&&
LAT...LON 3844 9064 3850 9066 3855 9064 3855 9056
3850 9056
$$
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
$$
Carney196
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
$$
MOC071-231515-
/O.CON.KLSX.FL.W.0026.000000T0000Z-250424T0840Z/
/UNNM7.1.ER.250421T1600Z.250422T1200Z.250423T0240Z.NO/
1006 PM CDT Mon Apr 21 2025
...FLOOD WARNING REMAINS IN EFFECT UNTIL LATE WEDNESDAY NIGHT...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Bourbeuse River at Union.
* WHEN...Until late Wednesday night.
* IMPACTS...At 17.0 feet, Flat Creek backs up to Smeltzer's Park.
* ADDITIONAL DETAILS...
- At 9:30 PM CDT Monday the stage was 15.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:30 PM CDT Monday was 15.3 feet.
- Forecast...The river is expected to rise to a crest of 16.0
feet tomorrow morning. It will then fall below flood stage
late tomorrow evening.
- Flood stage is 15.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Wed Thu Fri Sat Sun
Bourbeuse River
Union 15.0 15.3 13.5 8.0 4.9 3.8 3.4
&&
LAT...LON 3826 9123 3832 9133 3838 9137 3848 9094
3842 9087
$$
Britt591
WGUS83 KLSX 221454
FLSLSX
Flood Statement
National Weather Service St Louis MO
954 AM CDT Tue Apr 22 2025
...The Flood Warning remains in effect for the following locations
along the Meramec River...
Meramec River at Valley Park.
Meramec River at Pacific.
Meramec River near Arnold.
Meramec River near Eureka.
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
&&
MOC099-189-240300-
/O.EXT.KLSX.FL.W.0031.000000T0000Z-250425T0843Z/
/VLLM7.1.ER.250422T0007Z.250423T0600Z.250424T0243Z.NO/
954 AM CDT Tue Apr 22 2025
...FLOOD WARNING NOW 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 AM CDT Tuesday the stage was 19.0 feet.
- Forecast...The river is expected to rise to a crest of 19.5
feet just after midnight tonight. It will then fall below
flood stage late tomorrow 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 19.0 19.5 16.1 9.2 5.6 4.6
&&
LAT...LON 3850 9056 3855 9056 3857 9047 3856 9043
3853 9042 3853 9051
$$
MOC071-099-240300-
/O.EXT.KLSX.FL.W.0029.000000T0000Z-250424T2230Z/
/PCFM7.1.ER.250421T1845Z.250422T1800Z.250423T1630Z.NO/
954 AM CDT Tue Apr 22 2025
...FLOOD WARNING NOW IN EFFECT UNTIL THURSDAY AFTERNOON...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Meramec River at Pacific.
* WHEN...Until Thursday afternoon.
* IMPACTS...At 16.5 feet, Opeechee Beach Road is flooded and closed.
* ADDITIONAL DETAILS...
- At 9:30 AM CDT Tuesday the stage was 16.3 feet.
- Forecast...The river is expected to rise to a crest of 16.5
feet this afternoon. It will then fall below flood stage late
tomorrow morning.
- Flood stage is 15.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Wed Thu Fri Sat Sun
Meramec River
Pacific 15.0 16.3 15.6 11.5 6.5 4.2 3.1
&&
LAT...LON 3839 9082 3839 9091 3849 9081 3850 9066
3844 9064 3843 9077
$$
MOC099-189-240300-
/O.EXT.KLSX.FL.W.0035.250423T0600Z-250425T1800Z/
/ARNM7.1.ER.250423T0600Z.250424T0000Z.250424T1200Z.NO/
954 AM CDT Tue Apr 22 2025
...FLOOD WARNING NOW IN EFFECT FROM LATE TONIGHT TO FRIDAY
AFTERNOON...
* WHAT...Minor flooding is forecast.
* WHERE...Meramec River near Arnold.
* WHEN...From late tonight to Friday afternoon.
* IMPACTS...At 24.7 feet, Hawkins Road south of Meramec Bottom Road
begins flooding.
* ADDITIONAL DETAILS...
- At 9:30 AM CDT Tuesday the stage was 22.2 feet.
- Forecast...The river is expected to rise above flood stage
just after midnight tonight to a crest of 24.9 feet tomorrow
evening. It will then fall below flood stage Thursday
morning.
- 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 22.2 24.4 24.0 20.1 16.2 13.9
&&
LAT...LON 3847 9044 3847 9032 3840 9033 3837 9036
3841 9036 3842 9037 3843 9036 3845 9036
3845 9041
$$
MOC099-189-240300-
/O.CON.KLSX.FL.W.0030.000000T0000Z-250425T0400Z/
/ERKM7.1.ER.250421T0852Z.250422T1800Z.250423T2200Z.NO/
954 AM CDT Tue Apr 22 2025
...FLOOD WARNING REMAINS IN EFFECT UNTIL THURSDAY EVENING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Meramec River near Eureka.
* WHEN...Until Thursday evening.
* IMPACTS...At 22.0 feet, Willman Road near the Highway 109 bridge
becomes inundated and impassable.
* ADDITIONAL DETAILS...
- At 9:30 AM CDT Tuesday the stage was 21.6 feet.
- Forecast...The river is expected to rise to a crest of 21.7
feet this afternoon. It will then fall below flood stage
tomorrow afternoon.
- Flood stage is 19.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Wed Thu Fri Sat Sun
Meramec River
Eureka 19.0 21.6 20.8 15.7 10.3 8.2 7.2
&&
LAT...LON 3844 9064 3850 9066 3855 9064 3855 9056
3850 9056
$$
Carney777
WGUS83 KLSX 230240
FLSLSX
Flood Statement
National Weather Service St Louis MO
940 PM CDT Tue Apr 22 2025
...The Flood Warning continues for the following rivers in
Missouri...
Meramec River at Pacific.
Meramec River at Valley Park.
Meramec River near Eureka.
...The Flood Warning is extended for the following rivers in
Missouri...
Meramec River near Arnold.
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
&&
MOC071-099-241445-
/O.EXT.KLSX.FL.W.0029.000000T0000Z-250424T1800Z/
/PCFM7.1.ER.250421T1845Z.250422T1530Z.250423T1200Z.NO/
940 PM CDT Tue Apr 22 2025
...FLOOD WARNING NOW IN EFFECT UNTIL THURSDAY AFTERNOON...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Meramec River at Pacific.
* WHEN...Until Thursday afternoon.
* ADDITIONAL DETAILS...
- At 9:00 PM CDT Tuesday the stage was 15.9 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:00 PM CDT Tuesday was 16.5 feet.
- Forecast...The river has crested and is expected to fall
below flood stage tomorrow morning.
- Flood stage is 15.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Thu Fri Sat Sun Mon
Meramec River
Pacific 15.0 15.9 10.7 6.0 4.0 2.9 2.4
&&
LAT...LON 3839 9082 3839 9091 3849 9081 3850 9066
3844 9064 3843 9077
$$
MOC099-189-241445-
/O.EXT.KLSX.FL.W.0035.250423T0824Z-250425T1800Z/
/ARNM7.1.ER.250423T0824Z.250424T0000Z.250424T1200Z.NO/
940 PM CDT Tue Apr 22 2025
...FLOOD WARNING NOW IN EFFECT FROM LATE TONIGHT TO FRIDAY
AFTERNOON...
* WHAT...Minor flooding is forecast.
* WHERE...Meramec River near Arnold.
* WHEN...From late tonight to Friday afternoon.
* IMPACTS...At 24.7 feet, Hawkins Road south of Meramec Bottom Road
begins flooding.
* ADDITIONAL DETAILS...
- At 9:00 PM CDT Tuesday the stage was 23.4 feet.
- Forecast...The river is expected to rise above flood stage
late tonight to a crest of 24.9 feet tomorrow evening. It
will then fall below flood stage Thursday morning.
- Flood stage is 24.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Thu Fri Sat Sun Mon
Meramec River
Arnold 24.0 23.4 24.0 20.1 16.2 13.9 12.8
&&
LAT...LON 3847 9044 3847 9032 3840 9033 3837 9036
3841 9036 3842 9037 3843 9036 3845 9036
3845 9041
$$
MOC099-189-241445-
/O.CON.KLSX.FL.W.0031.000000T0000Z-250425T0843Z/
/VLLM7.1.ER.250422T0007Z.250423T0600Z.250424T0243Z.NO/
940 PM CDT Tue Apr 22 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.
* ADDITIONAL DETAILS...
- At 9:00 PM CDT Tuesday the stage was 19.6 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:00 PM CDT Tuesday was 19.7 feet.
- Forecast...The river is expected to rise to a crest of 19.7
feet just after midnight tonight. It will then fall below
flood stage late tomorrow evening.
- Flood stage is 18.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Thu Fri Sat Sun Mon
Meramec River
Valley Park 18.0 19.6 16.1 9.2 5.6 4.6 3.9
&&
LAT...LON 3850 9056 3855 9056 3857 9047 3856 9043
3853 9042 3853 9051
$$
MOC099-189-241445-
/O.CON.KLSX.FL.W.0030.000000T0000Z-250425T0400Z/
/ERKM7.1.ER.250421T0852Z.250422T2345Z.250423T2200Z.NO/
940 PM CDT Tue Apr 22 2025
...FLOOD WARNING REMAINS IN EFFECT UNTIL THURSDAY EVENING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Meramec River near Eureka.
* WHEN...Until Thursday evening.
* ADDITIONAL DETAILS...
- At 9:00 PM CDT Tuesday the stage was 21.9 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:00 PM CDT Tuesday was 21.9 feet.
- Forecast...The river is cresting and is expected to fall
below flood stage tomorrow afternoon.
- Flood stage is 19.0 feet.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Thu Fri Sat Sun Mon
Meramec River
Eureka 19.0 21.9 15.7 10.3 8.2 7.2 6.6
&&
LAT...LON 3844 9064 3850 9066 3855 9064 3855 9056
3850 9056
$$
Britt682
WGUS83 KLSX 231341
FLSLSX
Flood Statement
National Weather Service St Louis MO
841 AM CDT Wed Apr 23 2025
...The Flood Warning is cancelled for the following rivers in
Missouri...
Meramec River at Pacific.
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
MOC071-099-231445-
/O.CAN.KLSX.FL.W.0029.000000T0000Z-250423T1341Z/
/PCFM7.1.ER.250421T1845Z.250422T1530Z.250423T1047Z.NO/
841 AM CDT Wed Apr 23 2025
...FLOOD WARNING IS CANCELLED...
The Flood Warning is cancelled for
the Meramec River at Pacific.
* ADDITIONAL DETAILS...
- At 8:00 AM CDT Wednesday the stage was 14.7 feet.
- Forecast...The river is expected to fall to 1.9 feet Tuesday
morning.
&&
Fld Observed Forecasts (7:00 am)
Location Stg Stage Thu Fri Sat Sun Mon
Meramec River
Pacific 15.0 14.7 10.7 6.0 4.0 2.9 2.4
&&
LAT...LON 3839 9082 3839 9091 3849 9081 3850 9066
3844 9064 3843 9077
$$
CarneyWhat forecasters said that day
The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS St. Louis, MO wrote its last area forecast discussion before this river flood warning went out at Apr 20, 6:42 PM CDT, 2 hours 15 minutes earlier. Its key messages:
- The threat for severe thunderstorms will continue as storms move eastward. All hazards remain possible through this evening.
- Near to above normal temperatures stretch through the upcoming week with dry conditions Monday and Tuesday. The pattern becomes active once again beginning midweek.
Area forecast discussion, Apr 20, 6:42 PM CDT, 2 hours 15 minutes before
Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
642 PM CDT Sun Apr 20 2025
.KEY MESSAGES...
- The threat for severe thunderstorms will continue as storms move
eastward. All hazards remain possible through this evening.
- Near to above normal temperatures stretch through the upcoming
week with dry conditions Monday and Tuesday. The pattern becomes
active once again beginning midweek.
&&
.SHORT TERM... (Through Tonight)
Issued at 238 PM CDT Sun Apr 20 2025
Complicated surface pattern exists currently as of 1900 UTC, with
what looks like to be the effective warm front now near
KMYJ>>KUIN. This boundary should continue to lift northward over
the next 2-3 hours, effectively putting basically the entire CWA
in the warm sector. Far northwestern counties may be the
exception, where in/around Knox county may not high enough time to
warm/destabilize given the progress of the front and the copious
clouds on visible satellite imagery in place and upstream. Low-
topped/mini supercells that rode the warm front have
weakened/dissipated over the past hour. The main concern is then
turning to points upstream. Ongoing thunderstorms in southeast
Kansas and southwest Missouri are expected to grow upscale, with
both some embedded supercells and bowing segments expected through
the afternoon hours.
Tornadoes are the main concern through early this evening,
followed by damaging winds of 70+ mph given the mostly linear
storm mode and lack of deeper instability. Cannot rule out some
marginally severe hail, but earlier supercells that moved through
parts of central Missouri only managed very small hail. Storms in
southwest Missouri are expected to reach parts of central Missouri
by about 2200 UTC, spreading east/northeast with time. By around
0100 UTC, they should reach the Mississippi River. There is still
the expectation for a weakening trend near or not too long after
storms cross the river due to weakening diurnal instability and
abating low-level convergence along the boundary. Around midnight,
the dryline should be moving out of the CWA, ending any lingering
threat for strong to severe convection.
Gosselin
&&
.LONG TERM... (Monday through Next Sunday)
Issued at 238 PM CDT Sun Apr 20 2025
(Monday - Monday Night)
A cool, dry day is in store for Monday as a weak ridge of surface
high pressure moves across the mid-Mississippi Valley. Highs in
the mid 60s to low 70s are forecast from north to south. After a
cloudy start to the day, the stratus should decrease from west to
east due to advection leaving at least some sunshine for the
afternoon areawide.
A seasonably cool night is on tap Monday night due to a mostly
clear sky and light winds. Lows in the 40s are forecast, with the
coolest locations in favored valley terrain in east central and
southeast Missouri.
(Tuesday - Next Sunday)
A warmup will begin on Tuesday as winds turn out of the south
behind the departing surface ridge. Highs in the mid 70s to near
80 degrees are forecast along with dry conditions once again.
A more active pattern remains likely for mid/late work week. Lots
of uncertainty remains however on specifics as timing individual
disturbances within the zonal flow aloft is extremely difficult
this far out. It still looks like the best chance (60-70+%) is
centered on Friday as a cold front comes down. Before then, there
is a lot of spread with where/when any rain would be favored with
the ECMWF/EPS on the drier side of guidance through
Thursday/Thursday night while the GFS/GEFS would suggest a wetter
period of time.
For next weekend, dry weather is favored at this time along with
temperatures closer to normal behind Friday's cold front.
Gosselin
&&
.AVIATION... (For the 00z TAFs through 00z Monday Evening)
Issued at 639 PM CDT Sun Apr 20 2025
Thunderstorms have cleared KCOU/KJEF, but will impact KUIN and
metro terminals over the next 1-2 hours. Heavy downpours with
brief visibilities to around 1SM and strong SW wind gusts of 40-50
mph are expected. Behind the storms, variable winds may be
observed for a few hours before becoming southwest and then west.
Low MVFR ceilings will come in from the west this evening before
exiting from west to east early Monday.
Gosselin
&&
.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch until 1 AM CDT Monday 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 until 1 AM CDT Monday 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 LSXHazardous weather outlook, Apr 20, 3:10 PM CDT, 5 hours 47 minutes before
Hazardous Weather Outlook National Weather Service St Louis MO 310 PM CDT Sun Apr 20 2025 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-212015- 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- 310 PM CDT Sun Apr 20 2025 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight. Showers and thunderstorms are expected through late this evening. The strongest thunderstorms will be capable of large hail, damaging winds, and tornadoes. Locally heavy rain is possible in and around thunderstorms, posing an isolated threat for flash flooding. A flash flood watch remains in effect through 1 AM tonight. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Showers and thunderstorms are possible Tuesday night through Friday night. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report any wind damage or hail to the National Weather Service. Gosselin
In the hours before
Local storm report, Apr 20, 7:53 PM CDT, 1 hour 4 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
753 PM CDT Sun Apr 20 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0750 PM Tstm Wnd Gst 1 NW Farmington 37.79N 90.44W
04/20/2025 E60 MPH St. Francois MO Trained Spotter
via trained spotter.
&&
MRBLocal storm report, Apr 20, 7:55 PM CDT, 1 hour 2 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
755 PM CDT Sun Apr 20 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0740 PM Tstm Wnd Dmg 1 SSW Park Hills 37.83N 90.54W
04/20/2025 St. Francois MO Emergency Mngr
Power lines down at Camilla St. and Polk
Ave. via EM.
&&
MRBLocal storm report, Apr 20, 8:03 PM CDT, 54 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
803 PM CDT Sun Apr 20 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0740 PM Tstm Wnd Dmg Desloge 37.88N 90.52W
04/20/2025 St. Francois MO Emergency Mngr
Powerlines down, per EM.
&&
MRBLocal storm report, Apr 20, 8:14 PM CDT, 43 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
814 PM CDT Sun Apr 20 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0812 PM Tstm Wnd Gst Waterloo 38.33N 90.16W
04/20/2025 E65 MPH Monroe IL Broadcast Media
Near-zero visibility also reported.
&&
MRBLocal storm report, Apr 20, 8:24 PM CDT, 33 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
824 PM CDT Sun Apr 20 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0811 PM Tstm Wnd Dmg 2 W Hecker 38.31N 90.02W
04/20/2025 Monroe IL Emergency Mngr
Power poles down.
&&
MRBLocal storm report, Apr 20, 8:25 PM CDT, 32 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
825 PM CDT Sun Apr 20 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0805 PM Tstm Wnd Dmg 1 S Waterloo 38.32N 90.15W
04/20/2025 Monroe IL Emergency Mngr
Power poles down.
&&
MRBThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 7:13 PM CDT | Tornado Warning | LSX | Iron, Madison, Reynolds, Saint Francois, Washington | 47 min |
| Apr 20, 7:28 PM CDT | Tornado Warning | LSX | Jefferson, Sainte Genevieve, Saint Francois, Washington | 37 min |
| Apr 20, 7:53 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Madison, Sainte Genevieve, Saint Francois, Saint Louis | 52 min |
| Apr 20, 7:56 PM CDT | Tornado Warning | LSX | Sainte Genevieve | 49 min |
| Apr 20, 8:19 PM CDT | Tornado Warning | LSX | Madison | 41 min |
| Apr 20, 8:53 PM CDT | River Flood Warning | LSX | Monroe | 49 hr |
| Apr 20, 8:53 PM CDT | River Flood Warning | LSX | Lincoln | 67 hr |
| Apr 20, 8:57 PM CDT | River Flood Warning | LSX | Jefferson, Saint Louis | 67 hr |
| Apr 20, 8:57 PM CDT | River Flood Warning | LSX | Jefferson, Saint Louis | 4 days |
| Apr 21, 3:47 AM CDT | River Flood Warning | LSX | Marion | 6 hr |
| Apr 21, 7:23 AM CDT | River Flood Warning | LSX | Lewis | 23 hr |
| Apr 21, 7:23 AM CDT | River Flood Warning | LSX | Lewis | 61 hr |
| Apr 21, 11:19 AM CDT | River Flood Warning | LSX | Jefferson, Saint Louis | 4 days |
Nearby
River Flood Warnings in Missouri, 2025Every river flood warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.