Alert archive / Illinois / Flash Flood Warnings in 2019

Flash Flood Warning 39, NWS St. Louis, MO

August 13, 2019Bond County, Fayette County, Madison County, Illinois

NWS St. Louis, MO issued this flash flood warning at Aug 13, 2019, 2:14 AM CDT for Bond County, Fayette County, Madison County, Illinois. It was in force for 8 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
Aug 13, 2019, 2:14 AM CDT (07:14 UTC)
Expired
Aug 13, 2019, 10:15 AM CDT
In force
8 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Bond County, IL, Fayette County, IL, Madison County, IL

The radar

The St Louis radar (KLSX), 129 km from the middle of the area, began a volume at 07:17 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

Lincoln, IL (KILX), launched 00:00Z, 7.2 hours before the alert went out and 143 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2019-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2221 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2019-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2221 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
827 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
293 m²/s²
Significant tornado parameter
3.3
Supercell composite
19.6

Open this sounding in Storm Lab

The text

As transmitted.

531 
WGUS53 KLSX 130714
FFWLSX
ILC005-051-119-131515-
/O.NEW.KLSX.FF.W.0039.190813T0714Z-190813T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
214 AM CDT Tue Aug 13 2019

The National Weather Service in St Louis has issued a

* Flash Flood Warning for...
  Northern Bond County in south central Illinois...
  Northeastern Madison County in southwestern Illinois...
  Central Fayette County in south central Illinois...

* Until 1015 AM CDT Tuesday.

* At 214 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

This includes the following streams and drainages...Elm Point
Branch...East Fork Silver Creek...Hickory Creek...Richland Creek...
Ash Creek...Ramsey Creek...Walnut Creek...Sherry Creek...Old Hickory
Creek...Suck Creek...Little Silver Creek...Gilham Creek...South Fork
Kaskaskia River...Dorris Creek...Raccoon Creek...Bearcat Creek...
Hoffman Creek...East Fork Shoal Creek...Moccasin Creek...Stone
Creek...Wolf Creek...Dismal Creek...Little Creek...Little Hickory
Creek...Flat Creek...Little Dry Fork...Cedar Creek...Lake Fork...
Hurricane Creek and East Fork Kaskaskia River.

This includes the following highways...
 Interstate 70 in Illinois between exits 52 and 76.
 Interstate 55 in Illinois between exits 33 and 37.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3891 8944 3889 8985 3895 8991 3903 8943
      3903 8925 3906 8925 3913 8881 3891 8881
      3892 8871 3888 8869

$$

Gosselin
1 follow-up statement
640 
WGUS73 KLSX 130940
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
440 AM CDT Tue Aug 13 2019

ILC005-051-119-131515-
/O.CON.KLSX.FF.W.0039.000000T0000Z-190813T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Madison IL-Fayette IL-
440 AM CDT Tue Aug 13 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT FOR
NORTHERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS...NORTHEASTERN MADISON
COUNTY IN SOUTHWESTERN ILLINOIS AND CENTRAL FAYETTE COUNTIES IN SOUTH
CENTRAL ILLINOIS...

At 440 AM CDT, Doppler radar indicated thunderstorms had produced 
heavy rain across the warned area.  Flash flooding is expected to 
begin shortly.

This includes the following streams and drainages...Elm Point
Branch...East Fork Silver Creek...Hickory Creek...Richland Creek...
Ash Creek...Ramsey Creek...Walnut Creek...Sherry Creek...Old Hickory
Creek...Suck Creek...Little Silver Creek...Gilham Creek...South Fork
Kaskaskia River...Dorris Creek...Raccoon Creek...Bearcat Creek...
Hoffman Creek...East Fork Shoal Creek...Moccasin Creek...Stone
Creek...Wolf Creek...Dismal Creek...Little Creek...Little Hickory
Creek...Flat Creek...Little Dry Fork...Cedar Creek...Lake Fork...
Hurricane Creek and East Fork Kaskaskia River.

This includes the following highways...
 Interstate 70 in Illinois between exits 52 and 76.
 Interstate 55 in Illinois between exits 33 and 37.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3891 8944 3889 8985 3895 8991 3903 8943
      3903 8925 3906 8925 3913 8881 3891 8881
      3892 8871 3888 8869

$$

Gosselin

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 9:25 PM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey28 min
Aug 12, 10:23 PM CDTSpecial Weather StatementLSXMadison37 min
Aug 13, 2:18 AM CDTSpecial Weather StatementLSXMadison42 min
Aug 13, 3:06 AM CDTSpecial Weather StatementLSXBond, Clinton39 min
Aug 13, 3:28 AM CDTSevere Thunderstorm WarningLSXBond, Clinton, Fayette, Marion62 min
Aug 13, 3:40 AM CDTFlash Flood WarningLSXBond, Clinton, Fayette, Marion6 hr
Aug 13, 5:29 AM CDTSpecial Weather StatementLSXRandolph46 min
Aug 13, 5:36 AM CDTAreal Flood AdvisoryLSXMonroe, Saint Clair3 hr

Nearby

Flash Flood Warnings in Illinois, 2019Every flash flood warning in 2019

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.