Alert archive / Illinois / Flash Flood Warnings in 2024

Flash Flood Warning 13, NWS St. Louis, MO

May 24, 2024Calhoun County, Greene County, Pike County, Illinois; Pike County, Missouri

NWS St. Louis, MO issued this flash flood warning at May 24, 2024, 4:30 PM CDT for Calhoun County, Greene County, Pike County, Illinois; Pike County, Missouri. It was in force for 6 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 24, 2024, 4:30 PM CDT (21:30 UTC)
Expired: May 24, 2024, 10:30 PM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: Unknown

Counties Calhoun County, IL, Greene County, IL, Pike County, IL, Pike County, MO

The radar

The St Louis radar (KLSX), 94 km from the middle of the area, began a volume at 21:31 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.

What was reported inside it

Time	Report	Where	Remark
May 24, 5:37 PM CDT	FLOOD	1 Ese Louisiana, MO	Hwy 79 closed south of Louisiana due to water covering roadway. Cannot tell how deep water is or how fast it was flowing. Numerous twigs and small tree branches in water.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 203 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: 1248 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

740 
WGUS53 KLSX 242130
FFWLSX
ILC013-061-149-MOC163-250330-
/O.NEW.KLSX.FF.W.0013.240524T2130Z-240525T0330Z/
/00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
430 PM CDT Fri May 24 2024

The National Weather Service in St Louis has issued a

* Flash Flood Warning for...
  North Central Calhoun County in southwestern Illinois...
  Northwestern Greene County in southwestern Illinois...
  Southeastern Pike County in west central Illinois...
  Northeastern Pike County in northeastern Missouri...

* Until 1030 PM CDT.

* At 430 PM 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 3 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...
  Pittsfield, Louisiana, Roodhouse, Pleasant Hill, Atlas, Pike, 
  Belleview, Independence, Bedford, Patterson, Montezuma, 
  Martinsburg, Nebo, Milton, Hillview, Pearl, Detroit, Florence, 
  Time and Summer Hill.

This includes Interstate 72 between exits 31 and 35.

This includes the following streams and drainages...
  Hurricane Creek, Little Blue Creek, Sugar Creek, Bee Creek, Horn 
  Branch, Kersey Creek, Moore Creek, Illinois River, Little Sandy 
  Creek, Seminary Creek, Grassy Creek, Apple Creek, Trimley Creek, 
  Bettell Creek, Mississippi River, East Branch Kiser Creek, Buckeye 
  Creek, Bay Creek, Wolf Run, Birch Creek, Cold Run, Honey Creek, 
  Panther Creek, Buckhorn Creek, South Prong Spring Creek, Sixmile 
  Creek, East Panther Creek, Noix Creek, Dutch Creek, West Panther 
  Creek, Hill Creek, Salt River, Blue Creek, Haw Creek, Spring 
  Creek, Twomile Creek, Town Branch and Buck Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3969 9087 3968 9077 3970 9065 3956 9058
      3952 9058 3952 9028 3934 9067 3932 9085
      3938 9084 3942 9103 3947 9107 3948 9126
      3954 9123 3956 9103 3964 9089

FLASH FLOOD...RADAR INDICATED
DAM FAILURE...OCCURRING

$$

Fuchs

2 follow-up statements

951 
WGUS73 KLSX 250014
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
714 PM CDT Fri May 24 2024

ILC013-061-149-MOC163-250330-
/O.CON.KLSX.FF.W.0013.000000T0000Z-240525T0330Z/
/00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Greene IL-Pike IL-Pike MO-
714 PM CDT Fri May 24 2024

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT THIS 
EVENING FOR NORTH CENTRAL CALHOUN AND NORTHWESTERN GREENE COUNTIES 
IN SOUTHWESTERN ILLINOIS, SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL 
ILLINOIS AND NORTHEASTERN PIKE COUNTY IN NORTHEASTERN MISSOURI...

At 714 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 2 and 5 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...
  Pittsfield, Louisiana, Roodhouse, Pleasant Hill, Atlas, Pike, 
  Belleview, Independence, Bedford, Patterson, Montezuma, 
  Martinsburg, Nebo, Milton, Hillview, Pearl, Detroit, Florence, 
  Time and Summer Hill.

This includes Interstate 72 between exits 31 and 35.

This includes the following streams and drainages...
  Hurricane Creek, Little Blue Creek, Sugar Creek, Bee Creek, Horn 
  Branch, Kersey Creek, Moore Creek, Illinois River, Little Sandy 
  Creek, Seminary Creek, Grassy Creek, Apple Creek, Trimley Creek, 
  Bettell Creek, Mississippi River, East Branch Kiser Creek, Buckeye 
  Creek, Bay Creek, Wolf Run, Birch Creek, Cold Run, Honey Creek, 
  Panther Creek, Buckhorn Creek, South Prong Spring Creek, Sixmile 
  Creek, East Panther Creek, Noix Creek, Dutch Creek, West Panther 
  Creek, Hill Creek, Salt River, Blue Creek, Haw Creek, Spring 
  Creek, Twomile Creek, Town Branch and Buck Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3969 9087 3968 9077 3970 9065 3956 9058
      3952 9058 3952 9028 3934 9067 3932 9085
      3938 9084 3942 9103 3947 9107 3948 9126
      3954 9123 3956 9103 3964 9089

FLASH FLOOD...RADAR INDICATED
DAM FAILURE...OCCURRING

$$

Fuchs

039 
WGUS73 KLSX 250322
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
1022 PM CDT Fri May 24 2024

ILC013-061-149-MOC163-250332-
/O.EXP.KLSX.FF.W.0013.000000T0000Z-240525T0330Z/
/00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calhoun IL-Greene IL-Pike IL-Pike MO-
1022 PM CDT Fri May 24 2024

...FLASH FLOOD WARNING WILL EXPIRE AT 1030 PM CDT THIS EVENING FOR 
NORTH CENTRAL CALHOUN AND NORTHWESTERN GREENE COUNTIES IN 
SOUTHWESTERN ILLINOIS, SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL 
ILLINOIS AND NORTHEASTERN PIKE COUNTY IN NORTHEASTERN MISSOURI...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to stay vigilant of ponding on roadways.

&&

LAT...LON 3969 9087 3968 9077 3970 9065 3956 9058
      3952 9058 3952 9028 3934 9067 3932 9085
      3938 9084 3942 9103 3947 9107 3948 9126
      3954 9123 3956 9103 3964 9089

$$

Jaja

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 12:22 PM CDT	River Flood Warning	LSX	Pike	25 days
May 24, 12:22 PM CDT	River Flood Warning	LSX	Calhoun	26 days
May 24, 12:22 PM CDT	River Flood Warning	LSX	Pike	21 days
May 24, 12:22 PM CDT	River Flood Warning	LSX	Pike	17 days
May 24, 12:37 PM CDT	Severe Thunderstorm Warning	LSX	Jersey	27 min
May 24, 1:00 PM CDT	Severe Thunderstorm Warning	LSX	Greene	30 min
May 24, 1:13 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	47 min
May 24, 1:22 PM CDT	Tornado Warning	LSX	Montgomery	23 min
May 24, 1:47 PM CDT	Flash Flood Warning	LSX	Macoupin, Montgomery	8 hr
May 24, 1:49 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	24 min
May 24, 2:16 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Pike	44 min
May 24, 2:41 PM CDT	Areal Flood Advisory	LSX	Greene, Jersey, Macoupin	32 min
May 24, 2:53 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	52 min
May 24, 3:13 PM CDT	Flash Flood Warning	LSX	Greene, Jersey, Macoupin	6 hr
May 24, 3:41 PM CDT	Areal Flood Advisory	LSX	Calhoun, Greene, Macoupin, Pike	3 hr
May 24, 3:41 PM CDT	Severe Thunderstorm Warning	LSX	Brown, Pike	49 min
May 24, 4:25 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	50 min
May 24, 4:43 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	47 min
May 24, 5:11 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Pike	49 min
May 24, 5:24 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	51 min
May 24, 5:34 PM CDT	Flash Flood Warning	LSX	Calhoun, Greene, Jersey, Macoupin	6 hr
May 24, 5:36 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	39 min
May 24, 5:48 PM CDT	Flash Flood Warning	LSX	Calhoun	3 hr
May 24, 6:03 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Madison	20 min
May 24, 6:05 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	40 min
May 24, 3:52 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	53 min

Nearby

Flash Flood Warnings in Illinois, 2024 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.