Alert archive / Missouri / River Flood Warnings in 2020

River Flood Warning 104, NWS St. Louis, MO

April 25, 2020Jefferson County, Saint Louis County, Missouri

NWS St. Louis, MO issued this river flood warning at Apr 25, 2020, 8:52 PM CDT for Jefferson County, Saint Louis County, Missouri. It took effect at Apr 26, 2020, 9:37 AM CDT. It was in force for 7 days.

The area

The outline as issued.

The facts

Issued: Apr 25, 2020, 8:52 PM CDT (01:52 UTC)
In effect from: Apr 26, 2020, 9:37 AM CDT
Expired: May 3, 2020, 9:45 AM CDT
In force: 7 days
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: Minor

Counties Jefferson County, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 37 km from the middle of the area, began a volume at 01:53 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 at Arnold (ARNM7).

Action stage: 22 ft
Minor stage: 24 ft
Moderate stage: 35 ft
Major stage: 38 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 07019300, 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.

696 
WGUS43 KLSX 260152
FLWLSX
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service St Louis MO
852 PM CDT Sat Apr 25 2020

...The National Weather Service in St. Louis has issued a flood 
warning 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-270152-
/O.NEW.KLSX.FL.W.0104.200426T1500Z-200503T0130Z/
/ARNM7.1.ER.200426T1500Z.200429T0000Z.200501T1930Z.NO/
852 PM CDT Sat Apr 25 2020

The National Weather Service in St. Louis has issued a 

* Flood Warning for 
  the Meramec River near Arnold
* from Sunday morning to Saturday May 02.
* At  8:30 PM Saturday the stage was 22.8 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by late Sunday 
  morning and crest near 27.0 feet by Tuesday evening. The river is 
  forecast to fall below flood stage by Friday afternoon.
* Impact:  At 27.0 feet...Meramec Bottom Road between Wells Road and 
  Kerth Road begins flooding near this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/26  04/27  04/28  04/29  04/30

Meramec River
  Arnold          24.0   22.81      23.8   25.4   26.5   27.0   26.1


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

14 follow-up statements

906 
WGUS83 KLSX 261440
FLSLSX
Flood Statement
National Weather Service St Louis MO
940 AM CDT Sun Apr 26 2020

...The flood warning continues for the Meramec river at
the following locations...

 
  Meramec River near Sullivan

  Meramec River at Valley Park

  Meramec River near Arnold

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC055-221-272040-
/O.EXT.KLSX.FL.W.0097.000000T0000Z-200428T1200Z/
/SLLM7.1.ER.200425T2055Z.200426T0345Z.200427T0600Z.NO/
940 AM CDT Sun Apr 26 2020

The Flood Warning continues for
  the Meramec River near Sullivan
* until Tuesday morning.
* At  9:00 AM Sunday the stage was 11.1 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to remain steady around 11.1 feet this 
  afternoon, then fall below flood stage after midnight tonight.
* Impact:  At 11.0 feet...Right Bank begins to overflow flooding 
  wooded areas.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/27  04/28  04/29  04/30  05/01

Meramec River
  Sullivan        11.0   11.11      10.6    8.2    6.5    5.7    5.2


&&


LAT...LON 3800 9120 3806 9125 3829 9109 3840 9090
      3837 9082                       



$$

MOC099-189-272040-
/O.EXT.KLSX.FL.W.0105.200426T1912Z-200430T0300Z/
/VLLM7.1.ER.200426T1912Z.200427T1200Z.200428T2100Z.NO/
940 AM CDT Sun Apr 26 2020

The Flood Warning continues for
  the Meramec River at Valley Park
* from this afternoon to Wednesday evening.
* At  9:00 AM Sunday the stage was 15.6 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage this afternoon 
  and to crest near 16.9 feet by tomorrow morning. The river is 
  forecast to fall below flood stage Tuesday afternoon.
* Impact:  At 16.0 feet...Flood Stage.  Minor flooding begins.  Buder 
  Park begins to flood.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/27  04/28  04/29  04/30  05/01

Meramec River
  Valley Park     16.0   15.57      16.9   16.5   14.7   12.2    9.7


&&


LAT...LON 3853 9056 3855 9056 3857 9043 3854 9043




$$

MOC099-189-272040-
/O.EXT.KLSX.FL.W.0104.200426T1437Z-200502T1912Z/
/ARNM7.1.ER.200426T1300Z.200429T0600Z.200501T1312Z.NO/
940 AM CDT Sun Apr 26 2020

The Flood Warning continues for
  the Meramec River near Arnold
* from this morning to Saturday afternoon.
* At  9:00 AM Sunday the stage was 24.1 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 27.2 feet early Wednesday 
  morning, then fall below flood stage Friday morning.
* Impact:  At 27.0 feet...Meramec Bottom Road between Wells Road and 
  Kerth Road begins flooding near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/27  04/28  04/29  04/30  05/01

Meramec River
  Arnold          24.0   24.11      26.1   27.1   27.1   26.0   24.1


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

983 
WGUS83 KLSX 270106
FLSLSX
Flood Statement
National Weather Service St Louis MO
805 PM CDT Sun Apr 26 2020

...The flood warning is cancelled for the following rivers in 
Missouri...
 
  Meramec River near Sullivan

  
...The flood warning continues for the following rivers in 
Missouri...
 
  Meramec River at Valley Park

  Meramec River near Arnold

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC055-221-270135-
/O.CAN.KLSX.FL.W.0097.000000T0000Z-200428T1200Z/
/SLLM7.1.ER.200425T2055Z.200426T0345Z.200426T1945Z.NO/
805 PM CDT Sun Apr 26 2020

The Flood Warning is cancelled for
  the Meramec River near Sullivan.
* At  7:30 PM Sunday the stage was 10.5 feet.
* Flood stage is 11.0 feet.
* The river fell below flood stage at  2:45 PM Sunday.
* The river will continue falling to 7.7 feet by Tuesday morning.


&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/27  04/28  04/29  04/30  05/01

Meramec River
  Sullivan        11.0   10.53       9.7    7.7    6.5    5.7    5.2


&&


LAT...LON 3800 9120 3806 9125 3829 9109 3840 9090
      3837 9082                       



$$

MOC099-189-280104-
/O.EXT.KLSX.FL.W.0105.000000T0000Z-200429T2000Z/
/VLLM7.1.ER.200426T1951Z.200427T0600Z.200428T1400Z.NO/
805 PM CDT Sun Apr 26 2020

The Flood Warning continues for
  the Meramec River at Valley Park
* until Wednesday afternoon.
* At  7:30 PM Sunday the stage was 16.2 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 16.5 feet late tonight, then
  fall below flood stage late Tuesday morning.
* Impact:  At 16.0 feet...Flood Stage.  Minor flooding begins.  Buder 
  Park begins to flood.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/27  04/28  04/29  04/30  05/01

Meramec River
  Valley Park     16.0   16.19      16.5   16.1   14.2   11.7    9.4


&&


LAT...LON 3853 9056 3855 9056 3857 9043 3854 9043




$$

MOC099-189-280104-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200502T1800Z/
/ARNM7.1.ER.200426T1300Z.200428T1200Z.200501T1200Z.NO/
805 PM CDT Sun Apr 26 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Saturday afternoon.
* At  7:30 PM Sunday the stage was 25.2 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 27.0 feet by Tuesday morning, 
  then fall below flood stage Friday morning.
* Impact:  At 27.0 feet...Meramec Bottom Road between Wells Road and 
  Kerth Road begins flooding near this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/27  04/28  04/29  04/30  05/01

Meramec River
  Arnold          24.0   25.21      26.1   27.0   27.0   25.8   24.0


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

600 
WGUS83 KLSX 271515
FLSLSX
Flood Statement
National Weather Service St Louis MO
1015 AM CDT Mon Apr 27 2020

...The flood warning continues for the Meramec River
at the following locations...

 
  Meramec River at Valley Park

  Meramec River near Arnold

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-282043-
/O.EXT.KLSX.FL.W.0105.000000T0000Z-200428T2043Z/
/VLLM7.1.ER.200426T1951Z.200427T0615Z.200427T1443Z.NO/
1015 AM CDT Mon Apr 27 2020

The Flood Warning continues for
  the Meramec River at Valley Park
* until Tuesday afternoon.
* At  9:30 AM Monday the stage was 16.0 feet.
* Flood stage is 16.0 feet.
* Minor flooding is occurring.
* The river is forecast to continue falling to below flood stage by 
  early this afternoon.
* Impact:  At 16.0 feet...Flood Stage.  Minor flooding begins.  Buder 
  Park begins to flood.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/28  04/29  04/30  05/01  05/02

Meramec River
  Valley Park     16.0   16.02      14.5   12.6   10.4    8.9    7.7


&&


LAT...LON 3853 9056 3855 9056 3857 9043 3854 9043




$$

MOC099-189-282116-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200502T0730Z/
/ARNM7.1.ER.200426T1300Z.200428T1200Z.200501T0130Z.NO/
1015 AM CDT Mon Apr 27 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until late Friday night.
* At  9:30 AM Monday the stage was 26.1 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 26.8 feet by tomorrow morning, 
  then fall below flood stage Thursday evening.
* Impact:  At 27.0 feet...Meramec Bottom Road between Wells Road and 
  Kerth Road begins flooding near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/28  04/29  04/30  05/01  05/02

Meramec River
  Arnold          24.0   26.15      26.8   26.6   25.0   23.2   21.4


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

233 
WGUS83 KLSX 280123
FLSLSX
Flood Statement
National Weather Service St Louis MO
823 PM CDT Mon Apr 27 2020

...The flood warning is cancelled for the following rivers in 
Missouri...
 
  Meramec River at Valley Park

  
...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-280153-
/O.CAN.KLSX.FL.W.0105.000000T0000Z-200428T2043Z/
/VLLM7.1.ER.200426T1951Z.200427T0615Z.200427T1445Z.NO/
823 PM CDT Mon Apr 27 2020

The Flood Warning is cancelled for
  the Meramec River at Valley Park.
* At  8:00 PM Monday the stage was 15.5 feet.
* Flood stage is 16.0 feet.
* The river fell below flood stage at  9:45 AM Monday.
* The river will continue falling to 12.7 feet by Wednesday morning.


&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/28  04/29  04/30  05/01  05/02

Meramec River
  Valley Park     16.0   15.51      14.8   12.7   10.3    8.8    7.6


&&


LAT...LON 3853 9056 3855 9056 3857 9043 3854 9043




$$

MOC099-189-290122-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200502T0600Z/
/ARNM7.1.ER.200426T1300Z.200428T1200Z.200501T0000Z.NO/
823 PM CDT Mon Apr 27 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until late Friday night.
* At  8:00 PM Monday the stage was 26.4 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 26.5 feet by Tuesday morning, 
  then fall below flood stage Thursday evening.
* Impact:  At 26.0 feet...Athletic fields east of I-55 begin flooding 
  near this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/28  04/29  04/30  05/01  05/02

Meramec River
  Arnold          24.0   26.37      26.5   26.1   24.8   23.2   21.7


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

911 
WGUS83 KLSX 281400
FLSLSX
Flood Statement
National Weather Service St Louis MO
900 AM CDT Tue Apr 28 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-291959-
/O.CON.KLSX.FL.W.0104.000000T0000Z-200502T0600Z/
/ARNM7.1.ER.200426T1300Z.200428T0615Z.200501T0000Z.NO/
900 AM CDT Tue Apr 28 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until late Friday night.
* At  8:30 AM Tuesday the stage was 26.4 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by 
  Thursday evening.
* Impact:  At 26.0 feet...Athletic fields east of I-55 begin flooding 
  near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/29  04/30  05/01  05/02  05/03

Meramec River
  Arnold          24.0   26.37      25.7   24.5   23.5   21.9   20.0


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

800 
WGUS83 KLSX 290151
FLSLSX
Flood Statement
National Weather Service St Louis MO
851 PM CDT Tue Apr 28 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-300150-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200503T1648Z/
/ARNM7.1.ER.200426T1300Z.200428T0615Z.200502T1048Z.NO/
851 PM CDT Tue Apr 28 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Sunday morning.
* At  8:30 PM Tuesday the stage was 26.1 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by 
  Saturday morning.
* Impact:  At 26.0 feet...Athletic fields east of I-55 begin flooding 
  near this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/29  04/30  05/01  05/02  05/03

Meramec River
  Arnold          24.0   26.11      25.8   25.3   25.1   23.9   21.7


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

133 
WGUS83 KLSX 291219
FLSLSX
Flood Statement
National Weather Service St Louis MO
719 AM CDT Wed Apr 29 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-301818-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200504T0700Z/
/ARNM7.1.ER.200426T1300Z.200429T1145Z.200503T0100Z.NO/
719 AM CDT Wed Apr 29 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until late Sunday night.
* At  7:00 AM Wednesday the stage was 26.6 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by 
  Saturday evening.
* Impact:  At 26.0 feet...Athletic fields east of I-55 begin flooding 
  near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/30  05/01  05/02  05/03  05/04

Meramec River
  Arnold          24.0   26.60      26.0   25.7   24.9   22.8   20.5


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

259 
WGUS83 KLSX 291553
FLSLSX
Flood Statement
National Weather Service St Louis MO
1053 AM CDT Wed Apr 29 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-302152-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200505T0100Z/
/ARNM7.1.ER.200426T1300Z.200430T1200Z.200503T1900Z.NO/
1053 AM CDT Wed Apr 29 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Monday evening.
* At 10:30 AM Wednesday the stage was 26.7 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 27.1 feet by tomorrow morning, 
  then fall below flood stage Sunday early afternoon.
* Impact:  At 27.0 feet...Meramec Bottom Road between Wells Road and 
  Kerth Road begins flooding near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/30  05/01  05/02  05/03  05/04

Meramec River
  Arnold          24.0   26.74      27.1   26.9   26.2   24.7   22.0


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

083 
WGUS83 KLSX 300224
FLSLSX
Flood Statement
National Weather Service St Louis MO
924 PM CDT Wed Apr 29 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-010223-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200505T0300Z/
/ARNM7.1.ER.200426T1300Z.200430T1800Z.200503T2100Z.NO/
924 PM CDT Wed Apr 29 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Monday evening.
* At  9:00 PM Wednesday the stage was 26.9 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 27.3 feet by early Thursday 
  afternoon, then fall below flood stage Sunday afternoon.
* Impact:  At 27.0 feet...Meramec Bottom Road between Wells Road and 
  Kerth Road begins flooding near this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     04/30  05/01  05/02  05/03  05/04

Meramec River
  Arnold          24.0   26.94      27.1   27.2   26.7   24.9   22.7


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

679 
WGUS83 KLSX 301506
FLSLSX
Flood Statement
National Weather Service St Louis MO
1006 AM CDT Thu Apr 30 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-012105-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200505T0112Z/
/ARNM7.1.ER.200426T1300Z.200430T1800Z.200503T1912Z.NO/
1006 AM CDT Thu Apr 30 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Monday evening.
* At 9:30 AM Thursday the stage was 26.9 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue rising to near  feet by this 
  afternoon, then fall below flood stage Sunday early afternoon.
* Impact:  At 27.0 feet...Meramec Bottom Road between Wells Road and 
  Kerth Road begins flooding near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     05/01  05/02  05/03  05/04  05/05

Meramec River
  Arnold          24.0   26.93      26.8   26.3   24.7   22.6   21.3


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

132 
WGUS83 KLSX 010031
FLSLSX
Flood Statement
National Weather Service St Louis MO
731 PM CDT Thu Apr 30 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-020031-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200504T2300Z/
/ARNM7.1.ER.200426T1300Z.200430T0800Z.200503T1700Z.NO/
731 PM CDT Thu Apr 30 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Monday evening.
* At  7:00 PM Thursday the stage was 26.9 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to fall below flood stage by Sunday
  afternoon.
* Impact:  At 26.0 feet...Athletic fields east of I-55 begin flooding 
  near this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     05/01  05/02  05/03  05/04  05/05

Meramec River
  Arnold          24.0   26.85      26.7   26.2   24.5   22.6   21.3


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

917 
WGUS83 KLSX 011538
FLSLSX
Flood Statement
National Weather Service St Louis MO
1038 AM CDT Fri May 1 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-022136-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200504T1800Z/
/ARNM7.1.ER.200426T1300Z.200430T0800Z.200503T1200Z.NO/
1038 AM CDT Fri May 1 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Monday afternoon.
* At 10:00 AM Friday the stage was 26.5 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by 
  Sunday morning.
* Impact:  At 26.0 feet...Athletic fields east of I-55 begin flooding 
  near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     05/02  05/03  05/04  05/05  05/06

Meramec River
  Arnold          24.0   26.53      25.9   24.0   21.5   20.4   20.1


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

maples

086 
WGUS83 KLSX 021423
FLSLSX
Flood Statement
National Weather Service St Louis MO
923 AM CDT Sat May 2 2020

...The flood warning continues 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-032022-
/O.EXT.KLSX.FL.W.0104.000000T0000Z-200504T1108Z/
/ARNM7.1.ER.200426T1300Z.200430T0800Z.200503T0508Z.NO/
923 AM CDT Sat May 2 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until Monday morning.
* At  9:00 AM Saturday the stage was 25.4 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by 
  after midnight tonight.
* Impact:  At 25.1 feet...St. Louis County closes the following roads 
  at this height:  Butler Hill west of Summerhedge Place, Meramec 
  Bottom Road between Hageman Road and Highway 21, Hawkins Road south
  of Meramec Bottom Road, and Old Telegraph Road at Earl Widman 
  County Park.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     05/03  05/04  05/05  05/06  05/07

Meramec River
  Arnold          24.0   25.43      23.2   20.8   19.8   19.2   18.9


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

maples

273 
WGUS83 KLSX 031445
FLSLSX
Flood Statement
National Weather Service St Louis MO
945 AM CDT Sun May 3 2020

...The flood warning is cancelled 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...

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 or forecasts change.

Safety message:  Never drive cars, trucks, or sport utility vehicles 
through flooded areas.  The water may be too deep to allow for safe 
passage.

This product, along with additional weather and stream information, 
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.

&&

MOC099-189-031515-
/O.CAN.KLSX.FL.W.0104.000000T0000Z-200504T1108Z/
/ARNM7.1.ER.200426T1300Z.200430T0800Z.200503T0637Z.NO/
945 AM CDT Sun May 3 2020

The Flood Warning is cancelled for
  the Meramec River near Arnold.
* At  9:30 AM Sunday the stage was 23.4 feet.
* Flood stage is 24.0 feet.
* The river fell below flood stage at  1:37 AM Sunday.
* The river will continue falling to 21.5 feet by tomorrow morning.


&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     05/04  05/05  05/06  05/07  05/08

Meramec River
  Arnold          24.0   23.43      21.5   20.1   19.4   19.0   18.7


&&


LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
     3845 9043                        



$$

maples

What 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 25, 6:58 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Apr 25, 6:58 PM CDT, 1 hour 54 minutes before

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
658 PM CDT Sat Apr 25 2020

.SHORT TERM...  (Through Late Sunday Night)
Issued at 228 PM CDT Sat Apr 25 2020

The forecast looks to be progressing fairly close to expectations
with widespread rainfall now running oriented almost due south-
north along the Mississippi River. This will continue to push east
of the Mississippi River through later this evening. The only
exception may be over our far eastern forecast area, where
moisture lingers behind the system as it pivots northeast through
the Ohio Valley. Otherwise, northerly flow has proven to be quiet
effective in improving conditions over central Missouri, where
satellite imagery shows overcast skies breaking with scattered
diurnal cu over western Missouri.

Expect any lingering precipitation over Illinois counties to taper
off through Sunday morning as drier air continues to filter in on
north and northwesterly flow. Skies will clear allowing plenty of
sunshine and temperatures that rebound into the 60s for highs.
Things should stay dry ahead of the next system that approaches
very late Sunday night into Monday morning.

Maples

.LONG TERM...  (Monday through Next Saturday)
Issued at 228 PM CDT Sat Apr 25 2020

Much of the week will consist of northwest flow aloft with
additional disturbances occasionally presenting chances for rain
to some degree. The greatest potential for impacts to the local
area will stretch through the midweek period.

The first in a series of waves will come in the early half of
Monday. High pressure will track east into the Tennessee Valley,
as an upper level shortwave and relatively weak surface low
approach from the plains. Return flow will take over with warm
and moist air being pumped in out of the south/southwest.
Scattered showers will develop along an area of elevated lift in
relation to the initial push of warm air advection. Instability is
low, so thunder potential is minimal. Meanwhile, a system well to
the north pushes a weakening cold front in from the the north,
which washes out over central Illinois. The warm air wins out, but
could result in evening showers after a mostly dry afternoon.

The pattern remains rather messy as we head into to Tuesday.
However, this does look like our best opportunity for additional
rainfall as we progress through midweek. It seems as though the
Monday's washed out boundary could act as a low level moisture
pool for remnant cloud cover or lingering isolated showers into
Tuesday morning. This all runs ahead of a well-defined system that
tracks northeast through Iowa into northern Illinois during the
day Tuesday in additional to another surface disturbance over the
southern plains. Once again, we get divided between the two.

The devil is in the details, which really aren't entirely too
clear. Should we clear out, surface instability builds ahead of
the front with some guidance suggesting 2000+ J/kg in SBCAPE.
While there is plenty of convergence along the approaching cold
front, medium range guidance shows some limiting factors in the
form of marginal shear profiles and unidirectional flow somewhat
parallel with the front. This may indicate more of a pulse type
afternoon with the potential for strong storms along and ahead of
the front, but the main areas of lift remain to the north and
south, associated with the two surface features. It remains one to
watch as the time approaches.

The cold front move through late Tuesday with the system rotating
into the Great Lakes during the day Wednesday. Shower potential
will continue into at least Wednesday morning as we get behind the
system and underneath the upper low will warp around moisture.
Wednesday may very well be a "throw away" day with showers and
relatively cooler temperatures.

High pressure may give us a break at least through Thursday.
Ensembles continue show a spread in solutions from about mid to
late week. Nonetheless, there doesn't see to be any significant
systems in the offing with limited potential for precipitation
Friday and Saturday. Temperatures should rebound near normal
Thursday to above normal Saturday with southerly flow behind the
departing ridge.

Maples

&&

.AVIATION...  (For the 00z TAFs through 00z Sunday Evening)
Issued at 637 PM CDT Sat Apr 25 2020

A surface low centered over southwestern IN and northwestern KY
will move slowly northeastward. Most of the rain has shifted east
of the taf sites early this evening, although could not rule out a
brief period of sprinkles or drizzle in the St Louis metro area
this evening. The MVFR cloud ceilings in the St Louis metro area
should improve into the VFR category late tonight. The strong and
gusty north-northwest winds in UIN and the St Louis metro area
should gradually weaken through the night as the surface pressure
gradient slowly relaxes.

SPECIFICS FOR KSTL: A surface low centered over southwestern IN
and northwestern KY will move slowly northeastward. Most of the
rain has shifted east of STL early this evening, although could
not rule out a brief period of sprinkles or drizzle this evening.
The MVFR cloud ceilings should improve into the VFR category late
tonight by 09Z Sunday. The strong and gusty north-northwest winds
should gradually weaken through the night as the surface pressure
gradient slowly relaxes.

GKS

&&

.PRELIMINARY POINT TEMPS/POPS...
Saint Louis     44  64  46  68 /  50   5   0  20
Quincy          39  65  45  66 /  10   0  10  30
Columbia        41  66  47  69 /   5   0  10  20
Jefferson City  41  67  47  70 /   0   0   5  20
Salem           45  61  41  66 / 100  50   0  20
Farmington      42  64  42  68 /  30   0   0  10

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...Flood Watch until 1 AM CDT Sunday for Greene IL-Macoupin IL.

&&

WFO LSX

Hazardous weather outlook, Apr 25, 7:56 PM CDT, 56 minutes before

Hazardous Weather Outlook
National Weather Service Saint Louis MO
756 PM CDT Sat Apr 25 2020

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-270100-
Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-Callaway MO-
Clinton IL-Cole MO-Crawford MO-Fayette IL-Franklin MO-Gasconade MO-
Greene IL-Iron MO-Jefferson MO-Jersey IL-Knox MO-Lewis MO-Lincoln MO-
Macoupin IL-Madison IL-Madison MO-Marion IL-Marion MO-Moniteau MO-
Monroe IL-Monroe MO-Montgomery IL-Montgomery MO-Osage MO-Pike IL-
Pike MO-Ralls MO-Randolph IL-Reynolds MO-Saint Charles MO-
Saint Clair IL-Saint Francois MO-Saint Louis City MO-Saint Louis MO-
Sainte Genevieve MO-Shelby MO-Warren MO-Washington IL-Washington MO-
756 PM CDT Sat Apr 25 2020

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

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

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

There will be a chance of thunderstorms Tuesday through Wednesday
and also Friday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

GKS

In the hours before

Local storm report, Apr 25, 6:40 PM CDT, 2 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
640 PM CDT SAT APR 25 2020

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

0640 PM     HEAVY RAIN       5 S MORRISON            38.60N 91.64W
04/25/2020  M3.30 INCH       GASCONADE          MO   TRAINED SPOTTER

            48 HOUR TOTAL.

&&

TILLY

Local storm report, Apr 25, 6:42 PM CDT, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
642 PM CDT SAT APR 25 2020

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

0640 PM     HEAVY RAIN       CATAWISSA               38.42N 90.78W
04/25/2020  M2.80 INCH       FRANKLIN           MO   TRAINED SPOTTER

            48 HOUR TOTAL.

&&

TILLY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 5:31 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	4 days
Apr 26, 9:58 AM CDT	River Flood Warning	LSX	Saint Charles	6 days
Apr 26, 10:25 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	5 days
Apr 26, 10:25 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	4 days

Nearby

River Flood Warnings in Missouri, 2020 Every river flood warning in 2020

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.