Alert archive / Missouri / Flash Flood Warnings in 2024

Flash Flood Warning 21, NWS St. Louis, MO

July 3, 2024Osage County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jul 3, 2024, 7:50 AM CDT for Osage County, Missouri. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 3, 2024, 7:50 AM CDT (12:50 UTC)
Expired: Jul 3, 2024, 10:45 AM CDT
In force: 3 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Osage County, MO

The radar

The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 12:50 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 nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 0.8 hours before the alert went out and 238 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2090 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 266 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 12.0

Open this sounding in Storm Lab

The text

As transmitted.

773 
WGUS53 KLSX 031250
FFWLSX
MOC151-031545-
/O.NEW.KLSX.FF.W.0021.240703T1250Z-240703T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
750 AM CDT Wed Jul 3 2024

The National Weather Service in St Louis has issued a

* Flash Flood Warning for...
  Osage County in central Missouri...

* Until 1045 AM CDT.

* At 750 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. 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...
  Linn, Wardsville, Bland, Freeburg, Chamois, Westphalia, Rich 
  Fountain, Meta, Argyle, Morrison, Loose Creek, Frankenstein, 
  Bonnots Mill and Koeltztown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3829 9220 3837 9219 3839 9213 3840 9211
      3844 9216 3847 9217 3847 9215 3846 9211
      3848 9202 3850 9201 3853 9203 3856 9202
      3856 9200 3859 9198 3860 9194 3866 9187
      3868 9176 3871 9173 3870 9164 3829 9164

FLASH FLOOD...RADAR INDICATED

$$

Pfahler

1 follow-up statement

853 
WGUS73 KLSX 031412
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
912 AM CDT Wed Jul 3 2024

MOC151-031545-
/O.CON.KLSX.FF.W.0021.000000T0000Z-240703T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Osage MO-
912 AM CDT Wed Jul 3 2024

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT THIS 
MORNING FOR OSAGE COUNTY...

At 912 AM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 2.5 and 6 inches of rain have 
fallen. Additional rainfall amounts less than 1 inch are possible in 
the warned area. 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...
  Linn, Wardsville, Bland, Freeburg, Chamois, Westphalia, Rich 
  Fountain, Meta, Argyle, Morrison, Loose Creek, Frankenstein, 
  Bonnots Mill and Koeltztown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3829 9220 3837 9219 3839 9213 3840 9211
      3844 9216 3847 9217 3847 9215 3846 9211
      3848 9202 3850 9201 3853 9203 3856 9202
      3856 9200 3859 9198 3860 9194 3866 9187
      3868 9176 3871 9173 3870 9164 3829 9164

FLASH FLOOD...RADAR INDICATED

$$

Pfahler

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 8:07 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Shelby	38 min
Jul 2, 8:24 PM CDT	Severe Thunderstorm Warning	LSX	Lewis	51 min
Jul 2, 9:11 PM CDT	Severe Thunderstorm Warning	LSX	Shelby	48 min
Jul 2, 10:58 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	62 min
Jul 2, 11:23 PM CDT	Areal Flood Advisory	LSX	Monroe, Shelby	2 hr
Jul 2, 11:34 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone	41 min
Jul 3, 1:55 AM CDT	Areal Flood Advisory	LSX	Audrain, Boone, Callaway	30 min
Jul 3, 2:20 AM CDT	Heat Advisory	LSX	Iron, Madison, Reynolds	15 hr
Jul 3, 2:25 AM CDT	Flash Flood Warning	LSX	Audrain, Boone, Callaway	6 hr
Jul 3, 4:25 AM CDT	River Flood Warning	LSX	Boone	17 hr
Jul 3, 4:44 AM CDT	Areal Flood Advisory	LSX	Audrain, Lincoln, Montgomery, Pike, Warren	45 min
Jul 3, 5:29 AM CDT	Flash Flood Warning	LSX	Audrain, Callaway, Lincoln, Montgomery, Pike, Warren	3 hr
Jul 3, 7:29 AM CDT	Flash Flood Warning	LSX	Franklin, Gasconade, Montgomery, Saint Charles, Saint Louis, Warren	3 hr
Jul 3, 10:33 AM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	6 days
Jul 3, 10:33 AM CDT	River Flood Warning	LSX	Franklin, Warren	7 days
Jul 3, 10:33 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	21 days
Jul 3, 11:42 AM CDT	River Flood Warning	LSX	Jefferson	21 days
Jul 3, 11:42 AM CDT	River Flood Warning	LSX	Saint Charles	21 days
Jul 3, 11:42 AM CDT	River Flood Warning	LSX	Saint Louis, City of Saint Louis	21 days
Jul 3, 2:23 PM CDT	Flood Watch	LSX	Boone, Callaway, Cole, Crawford, Franklin, Gasconade and 14 more	37 hr
Jul 3, 3:58 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	62 min
Jul 3, 4:28 PM CDT	Areal Flood Advisory	LSX	Iron, Reynolds	3 hr

Nearby

Flash Flood Warnings in Missouri, 2024 Every flash flood warning in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.