Alert archive / Missouri / River Flood Warnings in 2021

River Flood Warning 4, NWS St. Louis, MO

January 25, 2021Jefferson County, Missouri

NWS St. Louis, MO issued this river flood warning at Jan 25, 2021, 6:48 PM CST for Jefferson County, Missouri. It took effect at Jan 26, 2021, 1:45 PM CST. It was in force for 12 hr.

The area

The outline as issued.

The facts

Issued: Jan 25, 2021, 6:48 PM CST (00:48 UTC)
In effect from: Jan 26, 2021, 1:45 PM CST
Expired: Jan 27, 2021, 1:59 AM CST
In force: 12 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: Minor

County Jefferson County, MO

The radar

The St Louis radar (KLSX), 35 km from the middle of the area, began a volume at 00:48 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 Big River at Byrnesville (BYRM7). The gauge peaked at 16.03 ft at Jan 26, 2021, 11:00 PM CST.

Action stage: 13 ft
Minor stage: 16 ft
Moderate stage: 20 ft
Major stage: 28 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 07018500, 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.

575 
WGUS43 KLSX 260048
FLWLSX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service St Louis MO
648 PM CST Mon Jan 25 2021

...The National Weather Service in St Louis MO has issued a Flood 
Warning for the following rivers in Missouri...

  Big River at Byrnesville.

River forecasts are based on observed precipitation and forecast 
precipitation for the next 48 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.weather.gov/ahps2/index.php?wfo=lsx.

  

&&


MOC099-261300-
/O.NEW.KLSX.FL.W.0004.210126T1945Z-210128T1600Z/
/BYRM7.1.ER.210126T1945Z.210127T0000Z.210127T1600Z.UU/
648 PM CST Mon Jan 25 2021

The National Weather Service in St Louis has issued a

* Flood Warning for
  the Big River at Byrnesville.
* From Tuesday afternoon to Thursday morning.
* At 6:00 PM CST Monday the stage was 10.7 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage early 
  tomorrow afternoon to a crest of 17.2 feet tomorrow evening. It 
  will then fall below flood stage late Wednesday morning.
* Impact...At 18.0 feet, Cedar Hill Road at Cedar Hill and Klondike 
  Road south of Cedar Hill begin to flood near this height.

&&


           Fld   Observed        Forecasts (6 pm CST)
Location   Stg   Stg   Day/Time  Tue   Wed   Thu   Fri   Sat

Big River
Byrnesvill 16.0  10.7  Mon 6 pm  17.2  14.1  9.0   7.1   6.2





&&

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

$$

Maples

3 follow-up statements

622 
WGUS83 KLSX 261558
FLSLSX

Flood Statement
National Weather Service St Louis MO
958 AM CST Tue Jan 26 2021

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

  Big River at Byrnesville.

River forecasts are based on observed precipitation and forecast 
precipitation for the next 48 hours.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

  

&&


MOC099-270400-
/O.EXT.KLSX.FL.W.0004.210126T2152Z-210128T1732Z/
/BYRM7.1.ER.210126T2152Z.210127T0600Z.210127T1732Z.UU/
958 AM CST Tue Jan 26 2021

...The Flood Warning is now in effect until late Thursday morning...

The Flood Warning continues for
  the Big River at Byrnesville.
* From this afternoon to Thursday morning.
* At 9:45 AM CST Tuesday the stage was 14.5 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late 
  this afternoon to a crest of 17.5 feet just after midnight 
  tonight. It will then fall below flood stage late tomorrow morning.
* Impact...At 18.0 feet, Cedar Hill Road at Cedar Hill and Klondike 
  Road south of Cedar Hill begin to flood near this height.

&&


           Fld   Observed        Forecasts (12 pm CST)
Location   Stg   Stg   Day/Time  Wed   Thu   Fri   Sat   Sun

Big River
Byrnesvill 16.0  14.5  Tue 9 am  15.9  8.4   6.2   5.2   4.8





&&

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

$$

MRM

740 
WGUS83 KLSX 270129
FLSLSX
Flood Statement
National Weather Service St Louis MO
729 PM CST Tue Jan 26 2021

...The flood warning continues for the following rivers in 
Missouri...

 
  Big River at Byrnesville

  Bourbeuse River at Union

  Meramec River near Sullivan

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.

&&

MOC099-280129-
/O.EXT.KLSX.FL.W.0004.000000T0000Z-210128T1342Z/
/BYRM7.1.ER.210127T0123Z.210127T0600Z.210127T1342Z.UU/
729 PM CST Tue Jan 26 2021

The Flood Warning continues for
  the Big River at Byrnesville
* until Thursday morning.
* At  6:45 PM Tuesday the stage was 15.9 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by this evening and
  to crest near 16.5 feet by after midnight tonight. The river is 
  forecast to fall below flood stage by tomorrow morning.
* Impact:  At 15.5 feet...Rockford Beach Park at the Highway MM bridge
  begins flooding.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     01/27  01/28  01/29  01/30  01/31

Big River
  Byrnesville     16.0   15.93      16.4    9.3    5.5    4.1    3.6


&&


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




$$

MOC071-280129-
/O.EXT.KLSX.FL.W.0005.210127T1251Z-210129T1021Z/
/UNNM7.1.ER.210127T1251Z.210128T0000Z.210128T0421Z.NO/
729 PM CST Tue Jan 26 2021

The Flood Warning continues for
  the Bourbeuse River at Union
* from Wednesday morning to late Thursday night.
* At  7:00 PM Tuesday the stage was 12.6 feet.
* Flood stage is 15.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by tomorrow morning
  and to crest near 15.8 feet by tomorrow evening. The river is 
  forecast to fall below flood stage by tomorrow late evening.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     01/27  01/28  01/29  01/30  01/31

Bourbeuse River
  Union           15.0   12.64      14.9   13.2    6.0    4.0    3.4


&&


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



$$

MOC055-221-280129-
/O.EXT.KLSX.FL.W.0002.000000T0000Z-210128T2040Z/
/SLLM7.1.ER.210126T0251Z.210126T1900Z.210127T1440Z.NO/
729 PM CST Tue Jan 26 2021

The Flood Warning continues for
  the Meramec River near Sullivan
* until Thursday afternoon.
* At  7:00 PM Tuesday the stage was 13.0 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by 
  tomorrow morning.
* Impact:  At 12.0 feet...The main entrance gate at Onondaga Cave 
  State Park begins flooding near this height.  This may eventually  
  force the park to use the rear entrance as the primary entrance to 
  the park.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     01/27  01/28  01/29  01/30  01/31

Meramec River
  Sullivan        11.0   13.02      11.4    7.8    6.0    5.5    5.1


&&


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



$$

784 
WGUS83 KLSX 270759
FLSLSX

Flood Statement
National Weather Service St Louis MO
159 AM CST Wed Jan 27 2021

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

  Big River at Byrnesville.

River forecasts are based on observed precipitation and forecast 
precipitation for the next 48 hours.

MOC099-270900-
/O.CAN.KLSX.FL.W.0004.000000T0000Z-210127T0759Z/
/BYRM7.1.ER.210127T0123Z.210127T1200Z.210127T1342Z.UU/
159 AM CST Wed Jan 27 2021

...The Flood Warning for the Big River at Byrnesville has been 
cancelled...

The Flood Warning is cancelled for
  the Big River at Byrnesville.
* At 1:45 AM CST Wednesday the stage was 15.9 feet.
* Flood stage is 16.0 feet.
* Forecast...The river has crested and has fallen below flood stage.

&&


            Fld   Observed        Forecasts (12 am CST)
Location    Stg   Stg   Day/Time  Thu   Fri   Sat   Sun   Mon

Big River
Byrnesville 16.0  15.9  Wed 1 am  11.1  6.1   4.3   3.7   3.4





&&

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

$$

Byrd

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 25, 6:47 PM CST	River Flood Warning	LSX	Crawford, Washington	34 hr
Jan 25, 6:47 PM CST	River Flood Warning	LSX	Crawford	15 hr
Jan 25, 6:50 PM CST	River Flood Warning	LSX	Franklin	39 hr

Nearby

River Flood Warnings in Missouri, 2021 Every river flood warning in 2021

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.