Hazardous Weather Outlook for Herculaneum, Missouri
Hazardous Weather Outlook
National Weather Service St Louis MO
325 AM CDT Wed May 8 2024
ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-090830-
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-
325 AM CDT Wed May 8 2024
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.
Scattered to widespread severe thunderstorms are expected today,
mainly from late morning into early evening. All severe weather
hazards are possible including large hail, damaging winds, and a few
strong tornadoes.
Training thunderstorms will be capable of producing locally heavy
rainfall and flash flooding. A Flood Watch has been issued for
portions of southeastern Missouri and southwestern Illinois.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
There is a chance of thunderstorms for parts of the area from late
Sunday through Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotters are encouraged to report occurrences of large hail, wind
damage and tornadoes to NWS St. Louis.
Flash Flood Warning for Herculaneum, Missouri
Flash Flood Statement
National Weather Service St Louis MO
218 PM CDT Wed May 8 2024
MOC071-099-189-221-082045-
/O.CON.KLSX.FF.W.0008.000000T0000Z-240508T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin MO-Jefferson MO-Saint Louis MO-Washington MO-
218 PM CDT Wed May 8 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM CDT THIS
AFTERNOON FOR SOUTHEASTERN FRANKLIN, JEFFERSON, SOUTHWESTERN SAINT
LOUIS AND NORTHWESTERN WASHINGTON COUNTIES IN EAST CENTRAL
MISSOURI...
At 218 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 3 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Arnold, Festus, Union, Eureka, Pacific, De Soto, Pevely, Crystal
City, St. Clair, Herculaneum, Hillsboro, Byrnes Mill, Cedar Hill,
High Ridge, Gray Summit, Antonia, Villa Ridge, Murphy, Barnhart
and Oakville.
This includes the following State Parks...
Mastodon Historic Site, Sandy Creek Covered Bridge Historic Site,
Gov. Dunklin`s Grave Historic Site and Robertsville State Park.
This includes the following highways...
Interstate 44 in Missouri between exits 242 and 253.
Interstate 55 in Missouri between exits 174 and 191.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
LAT...LON 3821 9097 3851 9096 3848 9074 3850 9041
3839 9034 3833 9037 3829 9037 3824 9036
3819 9034 3811 9110 3820 9110
FLASH FLOOD...RADAR INDICATED
Tornado Watch for Herculaneum, Missouri
WATCH COUNTY NOTIFICATION FOR WATCHES 202/204
NATIONAL WEATHER SERVICE ST LOUIS MO
138 PM CDT WED MAY 8 2024
ILC133-157-MOC055-071-073-093-099-123-179-186-187-221-082200-
/O.CON.KLSX.TO.A.0204.000000T0000Z-240508T2200Z/
TORNADO WATCH 204 REMAINS VALID UNTIL 5 PM CDT THIS AFTERNOON FOR
THE FOLLOWING AREAS
IN ILLINOIS THIS WATCH INCLUDES 2 COUNTIES
IN SOUTHWEST ILLINOIS
MONROE RANDOLPH
IN MISSOURI THIS WATCH INCLUDES 10 COUNTIES
IN EAST CENTRAL MISSOURI
CRAWFORD FRANKLIN GASCONADE
JEFFERSON WASHINGTON
IN SOUTHEAST MISSOURI
IRON MADISON REYNOLDS
SAINT FRANCOIS SAINTE GENEVIEVE
THIS INCLUDES THE CITIES OF CHESTER, FARMINGTON, SPARTA,
SULLIVAN, UNION, AND WASHINGTON.
Flood Warning for Herculaneum, Missouri
Flood Statement
National Weather Service St Louis MO
1035 AM CDT Wed May 8 2024
...The Flood Warning is extended 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...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
This product, along with additional weather and stream information,
is available at https://water.noaa.gov/wfo/lsx
MOC099-189-100345-
/O.EXT.KLSX.FL.W.0032.000000T0000Z-240515T0712Z/
/ARNM7.1.ER.240430T1955Z.240512T1200Z.240514T0112Z.NO/
1035 AM CDT Wed May 8 2024
...FLOOD WARNING NOW IN EFFECT UNTIL WEDNESDAY, MAY 15...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Meramec River near Arnold.
* WHEN...Until Wednesday, May 15.
* IMPACTS...At 27.0 feet, Meramec Bottom Road between Wells Road and
Kerth Road begins flooding near this height.
* ADDITIONAL DETAILS...
- At 10:00 AM CDT Wednesday the stage was 24.4 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:00 AM CDT Wednesday was 24.7 feet.
- Forecast...The river is expected to rise to a crest of 28.4
feet Sunday morning. It will then fall below flood stage
Monday evening.
- Flood stage is 24.0 feet.
Fld Observed Forecasts (7:00 am)
Location Stg Stage Thu Fri Sat Sun Mon
Meramec River
Arnold 24.0 24.4 24.5 25.9 27.5 28.4 26.2
LAT...LON 3848 9043 3848 9039 3846 9032 3841 9034
3845 9043
Flood Watch for Herculaneum, Missouri
Flood Watch
National Weather Service St Louis MO
301 AM CDT Wed May 8 2024
ILZ079-101-102-MOZ047>049-059-062>065-072>075-084-085-099-082315-
/O.NEW.KLSX.FA.A.0003.240508T1500Z-240509T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Randolph IL-Saint Clair IL-Monroe IL-Moniteau MO-Cole MO-Osage MO-
Gasconade 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-
Including the cities of Saint Louis, Union, Cahokia, Chester,
Washington, Jefferson City, Sullivan, Belleville, Farmington, and
Sparta
301 AM CDT Wed May 8 2024
...FLOOD WATCH IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH THIS
EVENING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of southwest Illinois, including the following
areas, Monroe IL, Randolph IL and Saint Clair IL and Missouri,
including the following areas, Cole MO, Crawford MO, Franklin MO,
Gasconade MO, Iron MO, Jefferson MO, Madison MO, Moniteau MO,
Osage MO, Reynolds MO, Saint Francois MO, Saint Louis City MO,
Saint Louis MO, Sainte Genevieve MO and Washington MO.
* WHEN...From 10 AM CDT this morning through this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Training thunderstorms capable of locally heavy rainfall
could produce areas of 2 to 5 inches of total rainfall.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.