Alert archive / Missouri / River Flood Warnings in 2020
River Flood Warning 119, NWS St. Louis, MO
NWS St. Louis, MO issued this river flood warning at May 16, 2020, 9:19 PM CDT for Jefferson County, Saint Louis County, Missouri. It took effect at May 18, 2020, 2:48 AM CDT. It was in force for 5 days.
The area
The outline as issued.
The facts
- Issued
- May 16, 2020, 9:19 PM CDT (02:19 UTC)
- In effect from
- May 18, 2020, 2:48 AM CDT
- Expired
- May 23, 2020, 9:23 AM CDT
- In force
- 5 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 02:19 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.
490
WGUS43 KLSX 170219
FLWLSX
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service St Louis MO
919 PM CDT Sat May 16 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.
&&
MOC099-189-180218-
/O.NEW.KLSX.FL.W.0119.200519T0100Z-200524T0300Z/
/ARNM7.1.ER.200519T0100Z.200521T0000Z.200522T2100Z.NO/
919 PM CDT Sat May 16 2020
The National Weather Service in St. Louis has issued a
* Flood Warning for
the Meramec River near Arnold
* from Monday evening to Saturday May 23.
* At 9:00 PM Saturday the stage was 19.0 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by Monday evening
and crest near 27.0 feet by Wednesday 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 05/17 05/18 05/19 05/20 05/21
Meramec River
Arnold 24.0 18.97 20.6 22.9 25.0 26.6 27.0
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$13 follow-up statements
261
WGUS83 KLSX 171537
FLSLSX
Flood Statement
National Weather Service St Louis MO
1037 AM CDT Sun May 17 2020
...The flood warning continues for the following rivers in
Missouri...
Meramec River near Arnold
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions or forecasts change.
Safety message: Never drive cars, trucks, or sport utility vehicles
through flooded areas. The water may be too deep to allow for safe
passage.
This product, along with additional weather and stream information,
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.
&&
MOC099-189-182136-
/O.EXT.KLSX.FL.W.0119.200518T1525Z-200524T0051Z/
/ARNM7.1.ER.200518T1525Z.200520T1200Z.200522T1851Z.NO/
1037 AM CDT Sun May 17 2020
The Flood Warning continues for
the Meramec River near Arnold
* from Monday morning to Saturday evening.
* At 10:00 AM Sunday the stage was 20.8 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by tomorrow late
morning and to crest near 27.3 feet by Wednesday morning. The river
is forecast to fall below flood stage by Friday early afternoon.
* Impact: At 27.0 feet...Meramec Bottom Road between Wells Road and
Kerth Road begins flooding near this height.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/18 05/19 05/20 05/21 05/22
Meramec River
Arnold 24.0 20.82 23.6 26.2 27.3 27.0 24.8
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$090
WGUS83 KLSX 180233
FLSLSX
Flood Statement
National Weather Service St Louis MO
933 PM CDT Sun May 17 2020
...The flood warning continues for the following rivers in
Missouri...
Meramec River...
near Sullivan
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.
&&
MOC055-221-190233-
/O.EXT.KLSX.FL.W.0122.200518T0800Z-200521T0000Z/
/SLLM7.1.ER.200518T0800Z.200518T1800Z.200519T1800Z.NO/
933 PM CDT Sun May 17 2020
The Flood Warning continues for
the Meramec River near Sullivan
* from late tonight to Wednesday evening.
* At 9:00 PM Sunday the stage was 8.9 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by early tomorrow
and to crest near 13.1 feet by tomorrow early afternoon. The river
is forecast to fall below flood stage by Tuesday early afternoon.
* 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 05/18 05/19 05/20 05/21 05/22
Meramec River
Sullivan 11.0 8.91 12.2 11.9 8.2 6.3 5.5
&&
LAT...LON 3800 9120 3806 9125 3829 9109 3840 9090
3837 9082
$$
MOC099-189-190233-
/O.EXT.KLSX.FL.W.0119.200518T0748Z-200524T0834Z/
/ARNM7.1.ER.200518T0748Z.200520T1200Z.200523T0234Z.NO/
933 PM CDT Sun May 17 2020
The Flood Warning continues for
the Meramec River near Arnold
* from late tonight to Sunday May 24.
* At 9:00 PM Sunday the stage was 23.2 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by after midnight
tonight and to crest near 28.6 feet by Wednesday morning. The river
is forecast to fall below flood stage by Friday before midnight.
* Impact: At 27.0 feet...Meramec Bottom Road between Wells Road and
Kerth Road begins flooding near this height.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/18 05/19 05/20 05/21 05/22
Meramec River
Arnold 24.0 23.18 24.7 27.6 28.6 28.3 25.8
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$
maples738
WGUS83 KLSX 181833
FLSLSX
Flood Statement
National Weather Service St Louis MO
133 PM CDT Mon May 18 2020
...The flood warning continues for the Meramec River at the
following locations...
Meramec River near Steelville
Meramec River near Sullivan
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.
&&
MOC055-200031-
/O.EXT.KLSX.FL.W.0130.000000T0000Z-200520T1200Z/
/SEEM7.1.ER.200518T1730Z.200519T0000Z.200519T0600Z.NO/
133 PM CDT Mon May 18 2020
The Flood Warning continues for
the Meramec River near Steelville
* until Wednesday morning.
* At 1:00 PM Monday the stage was 12.0 feet.
* Flood stage is 12.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 12.1 feet by this evening, then
fall below flood stage after midnight tonight.
* Impact: At 12.0 feet...Agricultural and recreational areas along
the right bank flood. At Adventure Outdoors west of Steelville,
the store begins to flood near this height.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/19 05/20 05/21 05/22 05/23
Meramec River
Steelville 12.0 12.03 11.5 7.0 5.0 4.1 3.7
&&
LAT...LON 3793 9152 3800 9152 3806 9125 3801 9121
$$
MOC055-221-200031-
/O.EXT.KLSX.FL.W.0122.000000T0000Z-200521T0412Z/
/SLLM7.1.ER.200518T0757Z.200519T0000Z.200519T2212Z.NO/
133 PM CDT Mon May 18 2020
The Flood Warning continues for
the Meramec River near Sullivan
* until Wednesday evening.
* At 1:00 PM Monday the stage was 13.1 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 13.4 feet by this evening, then
fall below flood stage tomorrow afternoon.
* Impact: At 12.0 feet...The main entrance gate at Onondaga Cave
State Park begins flooding near this height. This may eventually
force the park to use the rear entrance as the primary entrance to
the park.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/19 05/20 05/21 05/22 05/23
Meramec River
Sullivan 11.0 13.12 12.5 8.9 6.8 5.8 5.2
&&
LAT...LON 3800 9120 3806 9125 3829 9109 3840 9090
3837 9082
$$
MOC099-189-200031-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200524T0325Z/
/ARNM7.1.ER.200518T0624Z.200520T1800Z.200522T2125Z.NO/
133 PM CDT Mon May 18 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Saturday evening.
* At 1:00 PM Monday the stage was 25.4 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 28.0 feet by Wednesday early
afternoon, then fall below flood stage 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 05/19 05/20 05/21 05/22 05/23
Meramec River
Arnold 24.0 25.36 27.0 27.9 27.7 25.3 22.3
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$868
WGUS83 KLSX 190254
FLSLSX
Flood Statement
National Weather Service St Louis MO
953 PM CDT Mon May 18 2020
...The flood warning continues for the following rivers in
Missouri...
Meramec River near...
Sullivan
Arnold
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions or forecasts change.
Safety message: Never drive cars, trucks, or sport utility vehicles
through flooded areas. The water may be too deep to allow for safe
passage.
This product, along with additional weather and stream information,
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.
&&
MOC055-221-200252-
/O.EXT.KLSX.FL.W.0122.000000T0000Z-200521T0040Z/
/SLLM7.1.ER.200518T0757Z.200518T2115Z.200519T1840Z.NO/
953 PM CDT Mon May 18 2020
The Flood Warning continues for
the Meramec River near Sullivan
* until Wednesday evening.
* At 9:30 PM Monday the stage was 13.2 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by
tomorrow early afternoon.
* Impact: At 12.0 feet...The main entrance gate at Onondaga Cave
State Park begins flooding near this height. This may eventually
force the park to use the rear entrance as the primary entrance to
the park.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/19 05/20 05/21 05/22 05/23
Meramec River
Sullivan 11.0 13.17 12.0 8.4 6.6 5.6 5.0
&&
LAT...LON 3800 9120 3806 9125 3829 9109 3840 9090
3837 9082
$$
MOC099-189-200252-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200524T0234Z/
/ARNM7.1.ER.200518T0624Z.200520T1800Z.200522T2034Z.NO/
953 PM CDT Mon May 18 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Saturday evening.
* At 9:30 PM Monday the stage was 26.0 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 27.9 feet by Wednesday early
afternoon, then fall below flood stage 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 05/19 05/20 05/21 05/22 05/23
Meramec River
Arnold 24.0 25.97 26.9 27.8 27.6 25.2 22.2
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$
maples853
WGUS83 KLSX 191549
FLSLSX
Flood Statement
National Weather Service St Louis MO
1049 AM CDT Tue May 19 2020
...The flood warning continues for the following river in
Missouri...
Meramec River near Arnold
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions or forecasts change.
Safety message: Never drive cars, trucks, or sport utility vehicles
through flooded areas. The water may be too deep to allow for safe
passage.
This product, along with additional weather and stream information,
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.
&&
MOC099-189-202148-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200524T0112Z/
/ARNM7.1.ER.200518T0624Z.200520T1200Z.200522T1912Z.NO/
1049 AM CDT Tue May 19 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Saturday evening.
* At 10:30 AM Tuesday the stage was 26.4 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 27.0 feet tomorrow morning,
then fall below flood stage Friday afternoon.
* Impact: At 27.0 feet...Meramec Bottom Road between Wells Road and
Kerth Road begins flooding near this height.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/20 05/21 05/22 05/23 05/24
Meramec River
Arnold 24.0 26.43 27.0 26.3 24.5 22.8 21.3
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$593
WGUS83 KLSX 200121
FLSLSX
Flood Statement
National Weather Service St Louis MO
821 PM CDT Tue May 19 2020
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.
&&
MOC099-189-210122-
/O.ROU.KLSX.HY.S.0000.000000T0000Z-000000T0000Z/
/VLLM7.N.UU.000000T0000Z.000000T0000Z.000000T0000Z.OO/
821 PM CDT Tue May 19 2020
Forecast information for
Meramec River at Valley Park.
* At 8:00 PM Tuesday the stage was 14.9 feet.
* Flood stage is 16.0 feet.
* Forecast: The river is forecast to rise to near 15.4 feet tomorrow
morning.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/20 05/21 05/22 05/23 05/24
Meramec River
Valley Park 16.0 14.93 15.4 13.6 9.1 6.5 5.2
&&
LAT...LON 3853 9056 3855 9056 3857 9043 3854 9043
$$375
WGUS83 KLSX 201733
FLSLSX
Flood Statement
National Weather Service St Louis MO
1233 PM CDT Wed May 20 2020
...The flood warning continues for the following rivers in
Missouri...
Meramec River near Arnold
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions or forecasts change.
Safety message: Never drive cars, trucks, or sport utility vehicles
through flooded areas. The water may be too deep to allow for safe
passage.
This product, along with additional weather and stream information,
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.
&&
MOC099-189-212332-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200523T2230Z/
/ARNM7.1.ER.200518T0624Z.200520T1800Z.200522T1630Z.NO/
1233 PM CDT Wed May 20 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Saturday afternoon.
* At 12:00 PM Wednesday the stage was 26.7 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river cresting now and is forecast to fall below flood stage
Friday morning.
* Impact: At 27.0 feet...Meramec Bottom Road between Wells Road and
Kerth Road begins flooding near this height.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/21 05/22 05/23 05/24 05/25
Meramec River
Arnold 24.0 26.71 26.4 24.3 22.8 21.4 20.3
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$933
WGUS83 KLSX 210138
FLSLSX
Flood Statement
National Weather Service St Louis MO
838 PM CDT Wed May 20 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.
&&
MOC099-189-220137-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200523T1930Z/
/ARNM7.1.ER.200518T0624Z.200520T1245Z.200522T1330Z.NO/
838 PM CDT Wed May 20 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Saturday afternoon.
* At 8:00 PM 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
Friday 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 05/21 05/22 05/23 05/24 05/25
Meramec River
Arnold 24.0 26.57 26.0 24.1 22.6 21.4 20.3
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$433
WGUS83 KLSX 211441
FLSLSX
Flood Statement
National Weather Service St Louis MO
941 AM CDT Thu May 21 2020
...The flood warning continues for the following rivers in Missouri...
Meramec River near Arnold
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions or forecasts change.
Safety message: Never drive cars, trucks, or sport utility vehicles
through flooded areas. The water may be too deep to allow for safe
passage.
This product, along with additional weather and stream information,
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.
&&
MOC099-189-222041-
/O.CON.KLSX.FL.W.0119.000000T0000Z-200523T1930Z/
/ARNM7.1.ER.200518T0624Z.200520T1245Z.200522T1330Z.NO/
941 AM CDT Thu May 21 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Saturday afternoon.
* At 9:00 AM Thursday the stage was 25.8 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by
tomorrow morning.
* Impact: At 25.1 feet...St. Louis County closes the following roads
at this height: Butler Hill west of Summerhedge Place, Meramec
Bottom Road between Hageman Road and Highway 21, Hawkins Road south
of Meramec Bottom Road, and Old Telegraph Road at Earl Widman
County Park.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/22 05/23 05/24 05/25 05/26
Meramec River
Arnold 24.0 25.84 24.1 22.6 21.4 20.3 19.6
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$623
WGUS83 KLSX 220116
FLSLSX
Flood Statement
National Weather Service St Louis MO
816 PM CDT Thu May 21 2020
...The flood warning continues for the following river 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.
&&
MOC099-189-230115-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200524T0400Z/
/ARNM7.1.ER.200518T0624Z.200520T1245Z.200522T2200Z.NO/
816 PM CDT Thu May 21 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Saturday evening.
* At 8:00 PM Thursday the stage was 25.2 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by
tomorrow afternoon.
* 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 05/22 05/23 05/24 05/25 05/26
Meramec River
Arnold 24.0 25.24 24.6 23.2 22.0 20.9 20.2
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$717
WGUS83 KLSX 221339
FLSLSX
Flood Statement
National Weather Service St Louis MO
839 AM CDT Fri May 22 2020
...The flood warning continues for the following river in
Missouri...
Meramec River near Arnold
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions or forecasts change.
Safety message: Never drive cars, trucks, or sport utility vehicles
through flooded areas. The water may be too deep to allow for safe
passage.
This product, along with additional weather and stream information,
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.
&&
MOC099-189-231938-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200524T1600Z/
/ARNM7.1.ER.200518T0624Z.200520T1245Z.200523T1000Z.NO/
839 AM CDT Fri May 22 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Sunday morning.
* At 8:00 AM Friday the stage was 24.8 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by
early tomorrow.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/23 05/24 05/25 05/26 05/27
Meramec River
Arnold 24.0 24.84 23.9 22.5 21.2 20.7 20.8
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$551
WGUS83 KLSX 230216
FLSLSX
Flood Statement
National Weather Service St Louis MO
916 PM CDT Fri May 22 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.
&&
MOC099-189-240216-
/O.EXT.KLSX.FL.W.0119.000000T0000Z-200524T1800Z/
/ARNM7.1.ER.200518T0624Z.200520T1245Z.200523T1200Z.NO/
916 PM CDT Fri May 22 2020
The Flood Warning continues for
the Meramec River near Arnold
* until Sunday afternoon.
* At 9:00 PM Friday the stage was 24.4 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to continue falling to below flood stage by
tomorrow morning.
* Impact: At 24.0 feet...Corisande Hills Road begins flooding at this
height. Meramec Bottom Road between Hageman Road and Highway 21
begins flooding.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/23 05/24 05/25 05/26 05/27
Meramec River
Arnold 24.0 24.42 24.0 22.5 21.2 20.9 20.9
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$646
WGUS83 KLSX 231424
FLSLSX
Flood Statement
National Weather Service St Louis MO
923 AM CDT Sat May 23 2020
...The flood warning is cancelled for the following river in
Missouri...
Meramec River near Arnold
River forecasts are based on observed precipitation and forecast
precipitation for the next 24 hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor
this developing situation and issue follow up statements as
conditions or forecasts change.
Safety message: Never drive cars, trucks, or sport utility vehicles
through flooded areas. The water may be too deep to allow for safe
passage.
This product, along with additional weather and stream information,
is available at http://water.weather.gov/ahps2/index.php?wfo=lsx.
&&
MOC099-189-231453-
/O.CAN.KLSX.FL.W.0119.000000T0000Z-200524T1800Z/
/ARNM7.1.ER.200518T0624Z.200520T1245Z.200523T1245Z.NO/
923 AM CDT Sat May 23 2020
The Flood Warning is cancelled for
the Meramec River near Arnold.
* At 9:00 AM Saturday the stage was 24.0 feet.
* Flood stage is 24.0 feet.
* The river fell below flood stage at 7:45 AM Saturday.
* The river will continue falling to 22.7 feet by tomorrow morning.
&&
Fld Latest 7 a.m. Forecast
LOCATION Stg Obs Stg 05/24 05/25 05/26 05/27 05/28
Meramec River
Arnold 24.0 23.97 22.7 21.7 21.5 21.5 21.5
&&
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
$$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 May 16, 6:26 PM CDT, 2 hours 53 minutes earlier.
Area forecast discussion, May 16, 6:26 PM CDT, 2 hours 53 minutes before
Area Forecast Discussion...Updated Aviation National Weather Service Saint Louis MO 626 PM CDT Sat May 16 2020 .SHORT TERM... (Through Late Sunday Afternoon) Issued at 314 PM CDT Sat May 16 2020 Unsettled weather will continue through the weekend as an upper level trough passes through the central CONUS. Two features of note were analyzed within the broad upper trough this afternoon; a weak negatively tilted shortwave extending from the central Plains into Louisiana and a closed low moving ESE through the northern Plains. A surface low was analyzed in the vicinity of the Arklatex, with a warm front extending north and east into southern SE MO and southern IL. Several areas of showers and storms have developed in the mid- Mississippi Valley along the elevated portion of the front. The most vigorous convection is along and east of the Mississippi River, where limited clouds have allowed for MUCAPE to build to around 2,000 J/kg. Effective bulk shear in this area is rather limited, so individual updrafts have been fairly short-lived. Nonetheless, at least one storm has pushed up to near severe levels and I couldn't rule out another storm or two following suit. These storms have also been very efficient rainfall producers. With PWs in the upper quartile of seasonal climatology and a tendency for new updrafts to develop in the immediate wake of dying convection, we've had reports of 1-1.5" per hour beneath the heaviest cores, resulting in flash flooding in a few areas. Fortunately there does not appear to be any sort of anchoring feature to focus these storms over a particular area, so I think additional flash flooding will be rather isolated. As we move into the evening hours, storm coverage will wane with the instability. Meanwhile, the previously mentioned negatively- tilted wave will continue to the ENE, drawing the surface low and associated warm front north into the Mid-Mississippi Valley around midnight. The surface low will then deepen and push to our NE tomorrow morning as it interacts with the northern upper low, before eventually dragging a cold front through the area tomorrow afternoon. As larger scale forcing intensifies in the early morning hours, CAMs are in good agreement increasing precip coverage after roughly midnight. Scattered to widespread storms are then expected to continue until the cold front sweeps through the area during the day tomorrow. Instability is expected to build to around 1,000 J/kg ahead of the ahead of the front tomorrow, supporting yet another round of thunderstorms. Much like today, effective bulk shear looks fairly limited, with SREF guidance showing a less than 50 percent chance of us topping even 30 kts. Nonetheless this CAPE/shear parameter space coupled with the frontal forcing would support a limited severe threat in southern Illinois tomorrow afternoon. BSH .LONG TERM... (Monday through Next Saturday) Issued at 427 PM CDT Sat May 16 2020 Large scale omega block still on track to take hold at the beginning of the week while a closed low sits and spins over the eastern third of the CONUS. Surface ridging will develop beneath the block, kicking off an extended period of quiet weather in the mid-Mississippi Valley. Our proximity to the eastern CONUS low will keep things on the cloudy and cool side for the early portion of the week. The deep moisture associated with that low will wane as we move through the week, resulting in less overcast to broken stratus and more broken to scattered cu. This will allow temperatures to gradually build through the week. Some guidance is showing a chance for diurnal showers toward the end of the week, through the signal for this is quite weak, so have omitted it from the forecast at this point. BSH && .AVIATION... (For the 00z TAFs through 00z Sunday Evening) Issued at 611 PM CDT Sat May 16 2020 Showers and storms across the region will continue to decrease in intensity and coverage this evening before picking back up around 06z as low pressure moves through the region. I think we'll only see isolated to perhaps scattered thunder in the overnight hours, so have left thunder out of the TAFs until storms become more likely after sunrise. Scattered to widespread showers and storms will then persist until a cold front moves through the region in the afternoon, ushering the precip out of the area. Given questions around exact timing and coverage of tomorrow's storms, have just gone with VCTS and will update as details become more clear. Guidance in good agreement showing cigs quickly falling in the early morning hours as ample low level moisture moves into the region with the previously mentioned low. I'm not very confident on exactly how low cigs will drop, but at this point much of the guidance has all terminals dropping below 1,000 ft, so ended up going IFR at all terminals. BSH && .LSX WATCHES/WARNINGS/ADVISORIES... MO...None. IL...None. && WFO LSX
Hazardous weather outlook, May 16, 3:56 PM CDT, 5 hours 23 minutes before
Hazardous Weather Outlook National Weather Service Saint Louis MO 356 PM CDT Sat May 16 2020 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-172100- 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- 356 PM CDT Sat May 16 2020 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight. Thunderstorms will continue through early this evening along and east of the Mississippi River, where there is a marginal risk for large hail and damaging winds. Localized flash flooding is possible in areas that have already received heavy rainfall today. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The chance for thunderstorms will continue on Sunday. Isolated strong to severe storms are possible for areas near and south and east of Saint Louis during Sunday afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed tonight. BSH
In the hours before
Local storm report, May 16, 4:42 PM CDT, 4 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
442 PM CDT SAT MAY 16 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0425 PM FLOOD WILSONVILLE 39.07N 89.86W
05/16/2020 MACOUPIN IL TRAINED SPOTTER
WATER REPORTED COMING OUT OF FIELDS AND
FLOWING OVER ROUTE 138 BETWEEN ROUTE 4 AND
159.
&&
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 7:50 PM CDT | Areal Flood Advisory | LSX | Jefferson, Saint Louis | 3 hr |
| May 16, 8:32 PM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 3 days |
| May 16, 8:58 PM CDT | Flash Flood Watch | LSX | Crawford, Franklin, Iron, Jefferson, Lincoln, Madison and 8 more | 21 hr |
| May 16, 9:14 PM CDT | River Flood Warning | LSX | Saint Charles | 5 days |
| May 16, 9:14 PM CDT | River Flood Warning | LSX | Perry, Sainte Genevieve | 32 days |
| May 17, 1:36 AM CDT | Areal Flood Advisory | LSX | Franklin, Lincoln, Saint Charles, Saint Louis, City of Saint Louis | 6 hr |
| May 17, 2:02 AM CDT | Flash Flood Warning | LSX | Saint Charles, Saint Louis | 5 hr |
| May 17, 4:39 AM CDT | Areal Flood Advisory | LSX | Sainte Genevieve, Saint Francois | 6 hr |
| May 17, 8:45 AM CDT | River Flood Warning | LSX | Pike | 51 hr |
| May 17, 9:51 AM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 49 hr |
| May 17, 10:35 AM CDT | River Flood Warning | LSX | Crawford, Washington | 48 hr |
| May 17, 2:15 PM CDT | River Flood Warning | LSX | Reynolds | 29 hr |
Nearby
River Flood Warnings in Missouri, 2020Every 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.