Alert archive / Missouri / River Flood Warnings in 2026

River Flood Warning 45, NWS St. Louis, MO

April 27, 2026Lincoln County, Missouri

NWS St. Louis, MO issued this river flood warning at Apr 27, 2026, 3:53 PM CDT for Lincoln County, Missouri. It took effect at Apr 27, 2026, 11:00 PM CDT. It was in force for 3 days.

The area

The outline as issued.

The facts

Issued
Apr 27, 2026, 3:53 PM CDT (20:53 UTC)
In effect from
Apr 27, 2026, 11:00 PM CDT
Expired
May 1, 2026, 4:33 AM CDT
In force
3 days
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
Minor

County Lincoln County, MO

The radar

The St Louis radar (KLSX), 25 km from the middle of the area, began a volume at 20:55 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 Cuivre River at Old Monroe (OMNM7).

Action stage
22 ft
Minor stage
24 ft
Moderate stage
27 ft
Major stage
30 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05514705, 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.

915 
WGUS43 KLSX 272053
FLWLSX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service St Louis MO
353 PM CDT Mon Apr 27 2026

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

  Cuivre River at Old Monroe.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rainfall heavier than forecast could cause river levels to rise even
higher than predicted. The National Weather Service will monitor this
developing situation and issue follow up statements as conditions
change.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC113-290900-
/O.NEW.KLSX.FL.W.0045.260428T0400Z-260503T0900Z/
/OMNM7.1.ER.260428T0400Z.260429T1800Z.260501T2100Z.NO/
353 PM CDT Mon Apr 27 2026

...FLOOD WARNING IN EFFECT FROM THIS EVENING TO LATE SATURDAY
NIGHT...

* WHAT...Minor flooding is forecast.

* WHERE...Cuivre River at Old Monroe.

* WHEN...From this evening to late Saturday night.

* IMPACTS...At 24.5 feet, Extensive left bank agricultural flooding
  develops upstream of the gage.  A utility road is flooded along the
  Old Monroe levee along the left bank upstream of the gage.

* ADDITIONAL DETAILS...
  - At 3:30 PM CDT Monday the stage was 23.5 feet.
  - Forecast...The river is expected to rise above flood stage late
    this evening to a crest of 24.6 feet early Wednesday afternoon.
    It will then fall below flood stage Friday afternoon.
  - Flood stage is 24.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Tue   Wed   Thu   Fri   Sat

Cuivre River
 Old Monroe   24.0    23.5    24.2  24.5  24.5  24.2  23.6



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

Fuchs
7 follow-up statements
773 
WGUS83 KLSX 281657
FLSLSX

Flood Statement
National Weather Service St Louis MO
1157 AM CDT Tue Apr 28 2026

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

  Cuivre River at Old Monroe.

  Cuivre River near Troy.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC113-300500-
/O.EXT.KLSX.FL.W.0045.000000T0000Z-260503T2000Z/
/OMNM7.1.ER.260427T2331Z.260430T0000Z.260502T0800Z.NO/
1157 AM CDT Tue Apr 28 2026

...FLOOD WARNING NOW IN EFFECT UNTIL SUNDAY AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Cuivre River at Old Monroe.

* WHEN...Until Sunday afternoon.

* IMPACTS...At 24.5 feet, Extensive left bank agricultural flooding
  develops upstream of the gage.  A utility road is flooded along the
  Old Monroe levee along the left bank upstream of the gage.

* ADDITIONAL DETAILS...
  - At 11:30 AM CDT Tuesday the stage was 25.1 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 11:30 AM CDT Tuesday was 25.1 feet.
  - Forecast...The river is expected to rise to a crest of 25.5 feet
    tomorrow evening. It will then fall below flood stage early
    Saturday morning.
  - Flood stage is 24.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Wed   Thu   Fri   Sat   Sun

Cuivre River
 Old Monroe   24.0    25.1    25.3  25.4  24.7  23.8  22.8



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

MOC113-300500-
/O.EXT.KLSX.FL.W.0044.000000T0000Z-260430T0808Z/
/TRYM7.1.ER.000000T0000Z.260428T1800Z.260429T0208Z.NO/
1157 AM CDT Tue Apr 28 2026

...FLOOD WARNING NOW IN EFFECT UNTIL LATE WEDNESDAY NIGHT...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Cuivre River near Troy.

* WHEN...Until late Wednesday night.

* IMPACTS...At 23.0 feet, Considerable agricultural land is flooded
  between Troy and Moscow Mills.

* ADDITIONAL DETAILS...
  - At 11:30 AM CDT Tuesday the stage was 22.0 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 11:30 AM CDT Tuesday was 22.7 feet.
  - Forecast...The river is expected to rise to a crest of 22.8 feet
    this afternoon. It will then fall below flood stage late this
    evening.
  - Flood stage is 21.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Wed   Thu   Fri   Sat   Sun

Cuivre River
 Troy         21.0    22.0    16.1  11.0  8.7   8.0   7.7



&&

LAT...LON 3901 9106 3906 9100 3903 9098 3903 9095
      3897 9089 3894 9083 3889 9079 3886 9080
      3886 9087 3890 9087 3893 9093 3899 9098


$$

Fuchs
077 
WGUS83 KLSX 290147
FLSLSX

Flood Statement
National Weather Service St Louis MO
847 PM CDT Tue Apr 28 2026

...The Flood Warning continues for the following rivers in
Missouri...

  Cuivre River at Old Monroe.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC113-301400-
/O.CON.KLSX.FL.W.0045.000000T0000Z-260503T2000Z/
/OMNM7.1.ER.260427T2331Z.260430T0000Z.260502T0800Z.NO/
847 PM CDT Tue Apr 28 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL SUNDAY AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Cuivre River at Old Monroe.

* WHEN...Until Sunday afternoon.

* IMPACTS...At 24.5 feet, Extensive left bank agricultural flooding
  develops upstream of the gage.  A utility road is flooded along the
  Old Monroe levee along the left bank upstream of the gage.

* ADDITIONAL DETAILS...
  - At 8:30 PM CDT Tuesday the stage was 25.3 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 8:30 PM CDT Tuesday was 25.3 feet.
  - Forecast...The river is expected to rise to a crest of 25.7 feet
    tomorrow evening. It will then fall below flood stage early
    Saturday morning.
  - Flood stage is 24.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Thu   Fri   Sat   Sun   Mon

Cuivre River
 Old Monroe   24.0    25.3    25.5  24.7  23.8  22.8  21.8



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

Jaja
719 
WGUS83 KLSX 291735
FLSLSX

Flood Statement
National Weather Service St Louis MO
1235 PM CDT Wed Apr 29 2026

...The Flood Warning continues for the following rivers in
Missouri...

  Cuivre River at Old Monroe.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC113-010545-
/O.EXT.KLSX.FL.W.0045.000000T0000Z-260503T0300Z/
/OMNM7.1.ER.260427T2331Z.260429T0830Z.260501T1500Z.NO/
1235 PM CDT Wed Apr 29 2026

...FLOOD WARNING NOW IN EFFECT UNTIL SATURDAY EVENING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Cuivre River at Old Monroe.

* WHEN...Until Saturday evening.

* IMPACTS...At 24.5 feet, Extensive left bank agricultural flooding
  develops upstream of the gage.  A utility road is flooded along the
  Old Monroe levee along the left bank upstream of the gage.

* ADDITIONAL DETAILS...
  - At 11:30 AM CDT Wednesday the stage was 25.0 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 11:30 AM CDT Wednesday was 25.4 feet.
  - Forecast...The river is expected to rise to a crest of 25.1 feet
    this afternoon. It will then fall below flood stage late Friday
    morning.
  - Flood stage is 24.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Thu   Fri   Sat   Sun   Mon

Cuivre River
 Old Monroe   24.0    25.0    24.8  24.1  23.2  22.2  21.3



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

19
492 
WGUS83 KLSX 300110
FLSLSX

Flood Statement
National Weather Service St Louis MO
810 PM CDT Wed Apr 29 2026

...The Flood Warning continues for the following rivers in
Missouri...

  Cuivre River at Old Monroe.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC113-011315-
/O.EXT.KLSX.FL.W.0045.000000T0000Z-260502T1800Z/
/OMNM7.1.ER.260427T2331Z.260429T0830Z.260501T0600Z.NO/
810 PM CDT Wed Apr 29 2026

...FLOOD WARNING NOW IN EFFECT UNTIL SATURDAY AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Cuivre River at Old Monroe.

* WHEN...Until Saturday afternoon.

* IMPACTS...At 24.5 feet, Extensive left bank agricultural flooding
  develops upstream of the gage.  A utility road is flooded along the
  Old Monroe levee along the left bank upstream of the gage.

* ADDITIONAL DETAILS...
  - At 7:30 PM CDT Wednesday the stage was 24.7 feet and falling.
  - Recent Activity...The river rose above flood stage on April 27,
    cresting near 25.4 feet on the morning of April 29.
  - Forecast...The river is expected to fall below flood stage early
    Friday morning and continue falling over the coming days.
  - Flood stage is 24.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue

Cuivre River
 Old Monroe   24.0    24.7    23.9  23.0  22.0  20.9  19.9



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

Kimble
388 
WGUS83 KLSX 301628
FLSLSX

Flood Statement
National Weather Service St Louis MO
1128 AM CDT Thu Apr 30 2026

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

  Cuivre River at Old Monroe.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC113-020430-
/O.EXT.KLSX.FL.W.0045.000000T0000Z-260503T0000Z/
/OMNM7.1.ER.260427T2331Z.260429T0830Z.260501T1200Z.NO/
1128 AM CDT Thu Apr 30 2026

...FLOOD WARNING NOW IN EFFECT UNTIL SATURDAY EVENING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Cuivre River at Old Monroe.

* WHEN...Until Saturday evening.

* ADDITIONAL DETAILS...
  - At 10:30 AM CDT Thursday the stage was 24.3 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 10:30 AM CDT Thursday was 25.0 feet.
  - Forecast...The river is expected to fall below flood stage
    tomorrow morning.
  - Flood stage is 24.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Fri   Sat   Sun   Mon   Tue

Cuivre River
 Old Monroe   24.0    24.3    24.0  23.2  22.4  21.3  20.2



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

19
396 
WGUS83 KLSX 010219
FLSLSX

Flood Statement
National Weather Service St Louis MO
919 PM CDT Thu Apr 30 2026

...The Flood Warning continues for the following rivers in
Missouri...

  Cuivre River at Old Monroe.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx

&&

MOC113-021430-
/O.EXT.KLSX.FL.W.0045.000000T0000Z-260502T1800Z/
/OMNM7.1.ER.260427T2331Z.260429T0830Z.260501T0600Z.NO/
919 PM CDT Thu Apr 30 2026

...FLOOD WARNING NOW IN EFFECT UNTIL SATURDAY AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Cuivre River at Old Monroe.

* WHEN...Until Saturday afternoon.

* IMPACTS...At 24.0 feet, Initial flooding upstream.

* ADDITIONAL DETAILS...
  - At 8:30 PM CDT Thursday the stage was 24.1 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 8:30 PM CDT Thursday was 24.6 feet.
  - Forecast...The river is expected to fall below flood stage just
    after midnight tonight and continue falling to 18.0 feet
    Thursday, May 07.
  - Flood stage is 24.0 feet.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Sat   Sun   Mon   Tue   Wed

Cuivre River
 Old Monroe   24.0    24.1    22.9  21.9  20.8  19.7  18.8



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

Maples
327 
WGUS83 KLSX 010933 RRA
FLSLSX

Flood Statement
National Weather Service St Louis MO
433 AM CDT Fri May 1 2026

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

  Cuivre River at Old Monroe.

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

MOC113-011045-
/O.CAN.KLSX.FL.W.0045.000000T0000Z-260501T0933Z/
/OMNM7.1.ER.260427T2331Z.260429T0830Z.260501T0400Z.NO/
433 AM CDT Fri May 1 2026

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the Cuivre River at Old Monroe.

* ADDITIONAL DETAILS...
  - At 3:30 AM CDT Friday the stage was 23.9 feet.
  - Forecast...The river is expected to fall to 17.9 feet Friday, May
    08.



&&


All Times CDT Fld   Observed  Forecasts (7:00 am)
Location      Stg     Stage   Sat   Sun   Mon   Tue   Wed

Cuivre River
 Old Monroe   24.0    23.9    22.9  21.9  20.8  19.7  18.8



&&

LAT...LON 3889 9079 3892 9081 3894 9077 3895 9068
      3891 9067 3890 9074


$$

Elmore

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 27, 6:47 AM CDT, 9 hours 6 minutes earlier. Its key messages:

  • While periods of storms are expected through Monday morning, the most potent thunderstorms will occur this afternoon and evening.
  • Thunderstorms this afternoon and evening will be capable of damaging wind gusts, large hail, and strong tornadoes.
  • A period of cool, calm weather is expected mid-week through the weekend.
Area forecast discussion, Apr 27, 6:47 AM CDT, 9 hours 6 minutes before
Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
647 AM CDT Mon Apr 27 2026

.KEY MESSAGES...

- While periods of storms are expected through Monday morning, the most
  potent thunderstorms will occur this afternoon and evening.

- Thunderstorms this afternoon and evening will be capable of
  damaging wind gusts, large hail, and strong tornadoes.

- A period of cool, calm weather is expected mid-week through the
  weekend.

&&

.SHORT TERM... (Through Tuesday Night)
Issued at 155 AM CDT Mon Apr 27 2026

Storms across southeastern Missouri continue to butt up against an
instability gradient draped from north to south across Missouri.
The warm air advection feeding these storms will also push greater
instability slowly northeastward through this morning, though
propagation vectors will favor convection continuing to move east-
southeastward generally away from the CWA or into an unfavorable
environment. Additionally, the low-level jet refocusing across
Kansas will continue to support the downward trend in convection
across southeastern Missouri early this morning. Any linger storms
over the next couple of hours will be capable mainly of large hail,
though there is also a very low damaging wind and tornado threat for
storms that remain surface based.

Our attention turns to the storms over eastern Kansas that are
propagating eastward with the nose of the low-level jet. With the
nose of this low-level jet edging into northeastern Missouri later
this morning, the focus for these storms will spread into portions
of the CWA north of I-70. Vertical thermal profiles suggest that this
convection will be elevated, mitigating a threat of damaging wind
gusts and/or tornadoes. However, with around 40 kts of effective
shear and building MUCAPE, there is a low chance for isolated
instances of large hail.

How long this convection lingers is uncertain, although guidance
trends have been toward a lull in convective activity in the wake of
this convection and that associated with a cold front during the
late afternoon and evening. Ahead of the front, the warm sector
remains capped through much of the afternoon per a majority of
deterministic soundings. Although, any remnant outflow or
differential heating boundary from early day convection may serve as
enough of a forcing mechanism to spawn discrete convection during
the afternoon as lift from an approaching shortwave increases over
the region. If this convection does form, it will be in an
environment characterized by 2,000-2,500 J/kg of SBCAPE and roughly
50 kts of deep-layer shear. This will favor supercells capable of
all hazards, with long curved hodographs favoring strong tornadoes,
especially if storms are able to latch on to any remnant boundaries
across the CWA.

Where the environment isn't contaminated from earlier rounds of
convection, additional updrafts are expected along the cold front as
it enters the area 4-5pm. Forcing from the front paired with lift
from the shortwave will lead to numerous updrafts along the front.
While this will be occurring within a similar environment detailed
prior, the number of updrafts paired with them occurring along the
front may lead to destructive interactions and congealing into line
segments and/or clusters. While this will tend to limit a strong
tornado threat, storms will still be capable of all severe hazards.
Convection is expected to depart the CWA with the front by 9-10pm.

Even with the FROPA Monday evening, the threat for convection will
continue on Tuesday. Guidance consensus has the front stalling just
south of the CWA early Tuesday and then buckling northward as a
shortwave moves through the Central Plains and into the Midwest
through the day. This shortwave will send a subtle surface
reflection through the Mid South along the front, with a brief
period of warm air advection that will help force elevated
convection for areas mainly along and south of I-70. If the front
can move northward enough, shear profiles and instability amounts
favor supercells capable primarily of large hail across far
southeastern Missouri during the afternoon. Waning instability and
the front continuing southward will bring an end to rain chances
during the evening.

Elmore

&&

.LONG TERM... (Tuesday Night through Sunday)
Issued at 155 AM CDT Mon Apr 27 2026

Both deterministic guidance and ensemble clusters keep upper-level
troughing slowly moving eastward over the eastern CONUS through the
long range forecast period. This will maintain northwesterly flow
over the Middle Mississippi Valley through Saturday as several
rounds of high pressure pass through the region. As a result,
temperatures will run at or below climatological normals into the
weekend and mostly dry weather is expected.

Elmore

&&

.AVIATION...  (For the 12z TAFs through 12z Tuesday Morning)
Issued at 647 AM CDT Mon Apr 27 2026

Thunderstorms are expected at times throughout the day, impacting
all terminals. The greatest coverage of thunderstorms this morning
is expected to be across central, northeastern MO into west-central
IL impacting KCOU, KJEF, and KUIN, with lower confidence in
thunderstorms reaching the St. Louis metro terminals through early
afternoon. Another round of redevelopment will take place this
afternoon and evening with the greatest chance of severe
thunderstorms as well. These thunderstorms will be capable of hail,
strong winds, and some tornadoes. Trends will need to be monitored
for more significant terminal impacts beyond MVFR to IFR flight
conditions.

A cold front will pass through the region this evening, veering
southerly winds to northwesterly with drier conditions prevailing.
There is the potential for some post-frontal MVFR ceilings late
tonight into Tuesday morning, with the highest chance of impacts at
KUIN. However, given that confidence is low in impacts before the
end of the TAF period, VFR flight conditions are maintained for
now.

Pfahler

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

WFO LSX
Hazardous weather outlook, Apr 27, 2:02 AM CDT, 13 hours 51 minutes before
Hazardous Weather Outlook
National Weather Service St Louis MO
202 AM CDT Mon Apr 27 2026

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-280715-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
202 AM CDT Mon Apr 27 2026

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.

Periods of thunderstorms are expected through the day into this
evening. Thunderstorms this afternoon and evening will be capable of
large hail, damaging wind gusts, and tornadoes.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a chance of thunderstorms Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report wind damage, hail occurrence and
size, and tornado occurrence to NWS St. Louis.

Elmore

In the hours before

Local storm report, Apr 27, 3:11 PM CDT, 42 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
311 PM CDT Mon Apr 27 2026

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

0300 PM     Tstm Wnd Dmg     5 W Winfield            38.99N 90.83W
04/27/2026                   Lincoln            MO   Emergency Mngr

            Power lines down on Ethlyn Rd.

&&
Local storm report, Apr 27, 3:12 PM CDT, 41 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
312 PM CDT Mon Apr 27 2026

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

0305 PM     Hail             Old Monroe              38.93N 90.75W
04/27/2026  M0.70 Inch       Lincoln            MO   Public

&&
Local storm report, Apr 27, 3:24 PM CDT, 29 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
324 PM CDT Mon Apr 27 2026

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

0245 PM     Flash Flood      1 ENE Coalton           39.29N 89.29W
04/27/2026                   Montgomery         IL   Public

            Flooded roads outside of Nokomis on E 23rd
            Rd.

&&

Carney
Local storm report, Apr 27, 3:30 PM CDT, 23 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
330 PM CDT Mon Apr 27 2026

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

0256 PM     Hail             Moscow Mills            38.95N 90.92W
04/27/2026  M1.00 Inch       Lincoln            MO   Public

&&

Carney
Local storm report, Apr 27, 3:51 PM CDT, 2 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
351 PM CDT Mon Apr 27 2026

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

0351 PM     Hail             2 WSW Mexico            39.16N 91.91W
04/27/2026  E0.88 Inch       Audrain            MO   Public

&&
Local storm report, Apr 27, 3:52 PM CDT, 1 minute before
Preliminary Local Storm Report
National Weather Service St Louis MO
352 PM CDT Mon Apr 27 2026

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

0319 PM     Hail             5 NE Columbia           39.01N 92.28W
04/27/2026  E1.00 Inch       Boone              MO   Public

            Report from mPING: Quarter (1.00 in.).

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 8:43 PM CDTTornado WarningLSXBoone, Callaway, Cole, Moniteau30 min
Apr 26, 10:08 PM CDTTornado WarningLSXOsage13 min
Apr 27, 1:06 AM CDTSevere Thunderstorm WarningLSXCrawford39 min
Apr 27, 2:10 AM CDTAreal Flood AdvisoryLSXCrawford3 hr
Apr 27, 2:44 AM CDTSevere Thunderstorm WarningLSXWashington31 min
Apr 27, 3:08 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXSainte Genevieve, Saint Francois, Washington52 min
Apr 27, 3:36 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois39 min
Apr 27, 3:41 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren49 min
Apr 27, 4:02 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve24 min
Apr 27, 6:52 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXKnox, Shelby38 min
Apr 27, 7:35 AM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Monroe, Shelby55 min
Apr 27, 7:54 AM CDTTornado WarningLSXMonroe, Ralls51 min
Apr 27, 8:10 AM CDTSevere Thunderstorm Warning Considerable damage threatLSXAudrain, Lincoln, Marion, Pike, Ralls65 min
Apr 27, 8:24 AM CDTTornado WarningLSXPike, Ralls51 min
Apr 27, 10:09 AM CDTRiver Flood WarningLSXOsage24 hr
Apr 27, 10:41 AM CDTFlash Flood WarningLSXBoone, Cole, Moniteau3 hr
Apr 27, 11:18 AM CDTFlood WatchLSXAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 10 more10 hr
Apr 27, 11:48 AM CDTFlash Flood WarningLSXAudrain, Boone, Callaway, Cole, Moniteau, Montgomery and 1 more3 hr
Apr 27, 12:09 PM CDTAreal Flood AdvisoryLSXLincoln, Pike, Warren3 hr
Apr 27, 12:27 PM CDTTornado WarningLSXSaint Charles, Saint Louis, City of Saint Louis48 min
Apr 27, 1:25 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis37 min
Apr 27, 1:51 PM CDTAreal Flood AdvisoryLSXMontgomery, Warren3 hr
Apr 27, 1:55 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis45 min
Apr 27, 2:01 PM CDTTornado WarningLSXCity of Saint Louis27 min
Apr 27, 2:05 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike, Warren40 min
Apr 27, 2:13 PM CDTAreal Flood AdvisoryLSXSaint Louis, City of Saint Louis3 hr
Apr 27, 2:39 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles, Warren51 min
Apr 27, 2:42 PM CDTRiver Flood WarningLSXMonroe20 hr
Apr 27, 2:49 PM CDTTornado WarningLSXSaint Charles, Warren41 min
Apr 27, 2:54 PM CDTRiver Flood WarningLSXJefferson, Saint Louis6 days
Apr 27, 2:57 PM CDTSevere Thunderstorm WarningLSXBoone, Moniteau48 min
Apr 27, 3:05 PM CDTRiver Flood WarningLSXPerry, Sainte Genevieve8 days
Apr 27, 3:14 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis46 min
Apr 27, 3:19 PM CDTTornado WarningLSXSaint Charles, Saint Louis41 min
Apr 27, 3:25 PM CDTSevere Thunderstorm WarningLSXAudrain, Callaway42 min
Apr 27, 3:37 PM CDTFlash Flood WarningLSXBoone5 hr
Apr 27, 3:39 PM CDTRiver Flood WarningLSXLewis11 hr
Apr 27, 3:41 PM CDTRiver Flood WarningLSXLincoln24 hr
Apr 27, 3:41 PM CDTTornado WarningLSXAudrain, Callaway49 min
Apr 27, 3:43 PM CDTSevere Thunderstorm WarningLSXBoone62 min
Apr 27, 3:46 PM CDTSevere Thunderstorm WarningLSXMarion, Pike, Ralls44 min
Apr 27, 3:46 PM CDTTornado WarningLSXBoone14 min
Apr 27, 3:59 PM CDTRiver Flood WarningLSXCrawford, Washington18 hr
Apr 27, 4:00 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway, Moniteau60 min
Apr 27, 4:07 PM CDTSevere Thunderstorm WarningLSXAudrain, Pike, Ralls53 min
Apr 27, 4:09 PM CDTTornado WarningLSXAudrain, Montgomery, Pike, Ralls51 min
Apr 27, 4:13 PM CDTFlash Flood WarningLSXAudrain5 hr
Apr 27, 4:29 PM CDTTornado WarningLSXBoone, Callaway, Cole, Moniteau46 min
Apr 27, 4:34 PM CDTTornado WarningLSXMarion29 min
Apr 27, 4:35 PM CDTFlash Flood WarningLSXMonroe5 hr
Apr 27, 4:46 PM CDTTornado WarningLSXPike44 min
Apr 27, 4:52 PM CDTFlash Flood WarningLSXMarion, Ralls4 hr
Apr 27, 4:54 PM CDTTornado WarningLSXAudrain, Pike21 min
Apr 27, 4:57 PM CDTRiver Flood WarningLSXCallaway, Osage4 days
Apr 27, 4:57 PM CDTRiver Flood WarningLSXGasconade, Montgomery3 days
Apr 27, 4:57 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike63 min
Apr 27, 5:00 PM CDTTornado WarningLSXPike30 min
Apr 27, 5:04 PM CDTRiver Flood WarningLSXMarion22 hr
Apr 27, 5:09 PM CDTSevere Thunderstorm WarningLSXCallaway19 min
Apr 27, 5:14 PM CDTSevere Thunderstorm WarningLSXCallaway, Cole, Osage61 min
Apr 27, 5:20 PM CDTFlash Flood WarningLSXPike, Ralls3 hr
Apr 27, 5:21 PM CDTSevere Thunderstorm WarningLSXPike39 min
Apr 27, 5:32 PM CDTSevere Thunderstorm WarningLSXLincoln43 min
Apr 27, 5:47 PM CDTSevere Thunderstorm WarningLSXLincoln58 min
Apr 27, 5:55 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade, Warren50 min
Apr 27, 5:57 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Washington48 min
Apr 27, 5:59 PM CDTSevere Thunderstorm WarningLSXLincoln, Saint Charles46 min
Apr 27, 6:09 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Warren36 min
Apr 27, 6:26 PM CDTSevere Thunderstorm Warning Considerable damage threatLSXFranklin, Jefferson64 min
Apr 27, 6:28 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis47 min
Apr 27, 6:31 PM CDTTornado WarningLSXFranklin, Jefferson, Washington59 min
Apr 27, 6:40 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Saint Charles, Saint Louis48 min
Apr 27, 6:41 PM CDTTornado WarningLSXSaint Charles, Saint Louis32 min
Apr 27, 6:45 PM CDTSevere Thunderstorm WarningLSXCrawford45 min

Nearby

River Flood Warnings in Missouri, 2026Every river flood warning in 2026

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.