River Flood Warning 80, NWS St. Louis, MO

692 
WGUS83 KLSX 200139
FLSLSX
Flood Statement
National Weather Service St Louis MO
839 PM CDT Thu Mar 19 2020

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

 
  Meramec River near Sullivan

  Meramec River near Arnold

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

&&

MOC055-221-210138-
/O.EXT.KLSX.FL.W.0080.200320T0736Z-200323T1048Z/
/SLLM7.1.ER.200320T0736Z.200321T0600Z.200322T0448Z.NO/
839 PM CDT Thu Mar 19 2020

The Flood Warning continues for
  the Meramec River near Sullivan
* from late tonight to late Sunday night.
* At  8:00 PM Thursday the stage was 9.4 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage after midnight 
  tonight and to crest near 13.9 feet Saturday morning. The 
  river is forecast to fall below flood stage Saturday evening.
* Impact:  At 13.5 feet...Cave Road begins flooding at Onondaga Cave 
  State Park near this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     03/20  03/21  03/22  03/23  03/24

Meramec River
  Sullivan        11.0    9.42      12.1   13.4    9.8    7.3    6.1


&&


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



$$

MOC099-189-210138-
/O.EXT.KLSX.FL.W.0070.200320T1000Z-000000T0000Z/
/ARNM7.1.ER.200320T1000Z.200323T0600Z.000000T0000Z.NO/
839 PM CDT Thu Mar 19 2020

The Flood Warning continues for
  the Meramec River near Arnold
* from late tonight until further notice.
* At  8:00 PM Thursday the stage was 23.3 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage early Friday morning
  and crest near 29.9 feet Monday 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     03/20  03/21  03/22  03/23  03/24

Meramec River
  Arnold          24.0   23.30      24.2   26.7   29.1   29.9   28.6


&&


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



$$

157 
WGUS83 KLSX 201545
FLSLSX
Flood Statement
National Weather Service St Louis MO
1045 AM CDT Fri Mar 20 2020

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

 
  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 48 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.

&&

MOC055-221-212145-
/O.EXT.KLSX.FL.W.0080.000000T0000Z-200323T0412Z/
/SLLM7.1.ER.200320T1018Z.200321T0000Z.200321T2212Z.NO/
1045 AM CDT Fri Mar 20 2020

The Flood Warning continues for
  the Meramec River near Sullivan
* until Sunday evening.
* At 10:30 AM Friday the stage was 12.1 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 13.5 feet by this evening, then
  fall below flood stage tomorrow afternoon.
* Impact:  At 13.5 feet...Cave Road begins flooding at Onondaga Cave 
  State Park near this height.

&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     03/21  03/22  03/23  03/24  03/25

Meramec River
  Sullivan        11.0   12.10      12.5    9.0    7.0    6.0    5.5


&&


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



$$

MOC099-189-212145-
/O.EXT.KLSX.FL.W.0085.200321T1000Z-200325T0000Z/
/VLLM7.1.ER.200321T1000Z.200322T1200Z.200323T1800Z.NO/
1045 AM CDT Fri Mar 20 2020

The Flood Warning continues for
  the Meramec River at Valley Park
* from late tonight to Tuesday evening.
* At 10:30 AM Friday the stage was 12.2 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by early tomorrow 
  and to crest near 18.5 feet by Sunday morning. The river is 
  forecast to fall below flood stage by Monday early 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     03/21  03/22  03/23  03/24  03/25

Meramec River
  Valley Park     16.0   12.20      16.4   18.5   16.9   13.0   10.3


&&


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




$$

MOC099-189-212145-
/O.CON.KLSX.FL.W.0070.000000T0000Z-000000T0000Z/
/ARNM7.1.ER.200320T0622Z.200323T0000Z.000000T0000Z.NO/
1045 AM CDT Fri Mar 20 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until further notice.
* At 10:30 AM Friday the stage was 25.1 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 30.8 feet by Sunday 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     03/21  03/22  03/23  03/24  03/25

Meramec River
  Arnold          24.0   25.11      28.0   30.4   30.6   28.9   27.2


&&


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



$$

282 
WGUS83 KLSX 210158
FLSLSX

Flood Statement
National Weather Service St Louis MO
858 PM CDT Fri Mar 20 2020

...The flood warning continues for the following rivers in 
Missouri...
 
  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 48 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.

&&

MOC055-221-220158-
/O.EXT.KLSX.FL.W.0080.000000T0000Z-200323T0524Z/
/SLLM7.1.ER.200320T1018Z.200321T0600Z.200321T2324Z.NO/
858 PM CDT Fri Mar 20 2020

The Flood Warning continues for
  the Meramec River near Sullivan
* until late Sunday night.
* At  8:30 PM Friday the stage was 13.1 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 13.2 feet by early Saturday 
  morning, then fall below flood stage Saturday evening.
* 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     03/21  03/22  03/23  03/24  03/25

Meramec River
  Sullivan        11.0   13.12      12.6    9.1    7.0    6.0    5.5

&&

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

$$

MOC099-189-220158-
/O.EXT.KLSX.FL.W.0085.200321T1127Z-200324T2149Z/
/VLLM7.1.ER.200321T1127Z.200322T1200Z.200323T1549Z.NO/
858 PM CDT Fri Mar 20 2020

The Flood Warning continues for
  the Meramec River at Valley Park
* from Saturday morning to Tuesday afternoon.
* At  8:30 PM Friday the stage was 14.1 feet.
* Flood stage is 16.0 feet.
* Minor flooding is forecast.
* The river is forecast to rise above flood stage by Saturday morning
  and to crest near 18.6 feet by Sunday morning. The river is 
  forecast to fall below flood stage by late Monday 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     03/21  03/22  03/23  03/24  03/25

Meramec River
  Valley Park     16.0   14.08      16.1   18.6   16.7   12.7   10.3

&&

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

$$

MOC099-189-220158-
/O.CON.KLSX.FL.W.0070.000000T0000Z-000000T0000Z/
/ARNM7.1.ER.200320T0622Z.200323T0000Z.000000T0000Z.NO/
858 PM CDT Fri Mar 20 2020

The Flood Warning continues for
  the Meramec River near Arnold
* until further notice.
* At  8:30 PM Friday the stage was 26.3 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* The river is forecast to crest near 30.5 feet by Sunday evening.
* Impact:  At 30.0 feet...Wells Road below Suson Woods begins flooding
  at this height.

&&
                   Fld   Latest              7 a.m. Forecast
LOCATION           Stg  Obs Stg     03/21  03/22  03/23  03/24  03/25

Meramec River
  Arnold          24.0   26.31      27.8   30.2   30.3   28.8   27.4

&&

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

$$

003 
WGUS83 KLSX 211613
FLSLSX
Flood Statement
National Weather Service St Louis MO
1112 AM CDT Sat Mar 21 2020

...The flood warning is cancelled for the following rivers in 
Missouri...

  Meramec River near Sullivan

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

&&

MOC055-221-211642-
/O.CAN.KLSX.FL.W.0080.000000T0000Z-200323T0524Z/
/SLLM7.1.ER.200320T1018Z.200321T0400Z.200321T1500Z.NO/
1112 AM CDT Sat Mar 21 2020

The Flood Warning is cancelled for
  the Meramec River near Sullivan.
* At 10:30 AM Saturday the stage was 10.9 feet.
* Flood stage is 11.0 feet.
* The river fell below flood stage at 10:00 AM Saturday.
* The river will continue falling to 7.6 feet by tomorrow morning.


&&
                   Fld   Latest               7 a.m. Forecast
LOCATION           Stg  Obs Stg     03/22  03/23  03/24  03/25  03/26

Meramec River
  Sullivan        11.0   10.88       7.6    6.6    6.0    5.5    5.1


&&


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



$$

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
635 AM CDT Thu Mar 19 2020

.SHORT TERM...  (Through Late Friday Afternoon)
Issued at 344 AM CDT Thu Mar 19 2020

Convection across southwestern MO will spread northeastward
through our area this morning ahead of a warm front which will
lift northeastward into our area. A strong southwesterly low level
jet will also bring strong low level temperature and moisture
advection to our area this morning. Upper level divergence will
also be increasing over the region early this morning ahead of an
approaching upper level trough. Heavy downpours can be expected
with widespread rain amounts of around one-half inch and isolated
areas up to near 1 inch this morning due to anomalously high
precipitable water values. There may also be pea size hail with a
few of the stronger elevated storms this morning. Most of the
convection should shift east-northeast of the forecast area by
early afternoon allowing the temperature to rise to highs about 15
to 20 degrees above normal with surface dew points rising into
the lower 60s for much of our area south of the warm front. Strong
gusty winds can be expected this afternoon due to a tightening
surface pressure gradient. Low-mid level wind shear will
strengthen this afternoon and this evening as an 80 kt mid level
wind max ahead of the approaching upper level trough moves
through MO. Severe storms are possible late this afternoon and
this evening ahead of an approaching dry line/cold front. While
there is a potential of severe storms across most of our area, it
appears that the best potential may be across southeast MO and
southwest IL this evening where the greatest instability will
exist with the highest surface based CAPE values. These storms may
be capable of producing damaging winds, isolated tornadoes, and
possibly also large hail. These storms should shift southeast of
our forecast area around 06Z Friday, although rain will still be
possible until about 12Z Friday as a strong cold front moves
southeastward through our forecast area late tonight into Friday
morning. Will issue a Flash Flood Watch for southeast MO and
southwest IL today and this evening due to the heavy rain amounts
from repeated rounds of storms on already saturated grounds from
yesterday mornings heavy rain. Much colder low temperatures can
be expected late tonight across northeast and central MO and west
central IL due to cold air advection behind the cold front. This
cooling trend will continue Friday and Friday night as a strong
1040 mb surface ridge over the northern Plains builds southeastward
into our area behind the cold front.

GKS

.LONG TERM...  (Friday Night through Wednesday)
Issued at 344 AM CDT Thu Mar 19 2020

Colder conditions will continue into the weekend with lows Friday
night about 5 to 10 degrees below normal.  There will be the
potential for light rain late Saturday night through Sunday evening
ahead of a southern stream shortwave and well north of a surface low
moving eastward through the Gulf Coast states.  The best chance of
precipitation will be across central and southeast MO.  A better
potential for more significant precipitation will occur late Monday
night through Tuesday evening as a northern stream upper level
trough and associated surface low move eastward through northern MO
with strong low-mid level warm air advection ahead of the low and
trailing cold front.  Temperatures will be warm enough that the
precipitation type should be liquid rain with a warming trend
beginning on Monday.

GKS

&&

.AVIATION...  (For the 12z TAFs through 12z Friday Morning)
Issued at 556 AM CDT Thu Mar 19 2020

Showers and thunderstorms will move through all of the terminals
this morning, with IFR/LIFR conditions. This first area will move
out of the the terminals by afternoon with MVFR ceilings expected
early this afternoon and VFR by late this afternoon. Scattered
thunderstorms are expected to move back ito the area late this
afternoon and this evening. Any of these storms could have
potential to produce MVFR/possibly IFR ceilings/visiblities with
brief heavy rainfall and wind gusts over 35KTS. East winds at the
start of the period will turn out of the south this afternoon and
will with gusts to 15 to 25KTS.

SPECIFICS FOR KSTL:

Visiblities in fog will improve in the next hour as showers and
thunderstorms move into the terminal. These showers and
thunderstorms will continue at the terminal through 18Z with
IFR/LIFR conditions. Then ceilings will improve to VFR by late
this afternoon, but the threat for scattered thunderstorms are
expected to move back into the vicinity between 23-06Z. Any of
these storms could have potential to produce MVFR/possibly IFR
ceilings/visiblities with brief heavy rainfall and wind gusts over
35KTS. East winds at the start of the period will turn out of the
south this afternoon and with gusts to 15 to 25KTS. A cold front
will cause winds to turn out of the northwest on Friday morning.

Britt

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flash Flood Watch through late tonight for Crawford MO-Iron MO-
     Jefferson MO-Madison MO-Reynolds MO-Saint Francois MO-
     Sainte Genevieve MO-Washington MO.

IL...Flash Flood Watch through late tonight for Bond IL-Clinton IL-
     Fayette IL-Marion IL-Monroe IL-Randolph IL-Saint Clair IL-
     Washington IL.

&&

WFO LSX

Hazardous Weather Outlook
National Weather Service Saint Louis MO
417 AM CDT Thu Mar 19 2020

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-200930-
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-
417 AM CDT Thu Mar 19 2020

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

.DAY ONE...Today and tonight.

Thunderstorms are expected this morning. These storms may contain
heavy rainfall and small hail.

Scattered severe thunderstorms are likely this afternoon and
evening, with the greatest probability across southeast Missouri and
southwest Illinois. Large hail, damaging winds, and tornadoes are all
possible with any severe storms.

A Flash Flood Watch is in effect for today and this evening across
southeast Missouri and southwest Illinois due to heavy rainfall
amounts from several rounds of storms which may lead to flash
flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon and evening.
Spotters are encouraged to report any severe weather and rainfall
amounts in excess of an inch or any flooding, if observed, to the
National Weather Service.

GKS