Alert archive / Illinois / Flash Flood Warnings in 2018
Flash Flood Warning 23, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 1, 2018, 7:37 PM CDT for 5 counties in Illinois. It was in force for 6 hr. 2 reports 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
- Jul 1, 2018, 7:37 PM CDT (00:37 UTC)
- Expired
- Jul 2, 2018, 1:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bond County, IL, Fayette County, IL, Macoupin County, IL, Madison County, IL, Montgomery County, IL
The radar
The Lincoln radar (KILX), 108 km from the middle of the area, began a volume at 00:36 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 |
|---|---|---|---|
| Jul 1, 7:44 PM CDT | FLOOD | 2 E Mount Olive, IL | NUMEROUS CREEKS BANK FULL WITH LOW WATER CROSSINGS IMPASSIBLE AROUND THE MOUNT OLIVE AREA. |
| Jul 1, 8:10 PM CDT | FLASH FLOOD | 1 Se Hillsboro, IL | HIGHWAY 16 CLOSED WITH CAR STRANDED ON HIGHWAY AT THE RAILROAD VIADUCT. MULTIPLE COUNTY ROADS CLOSED DUE TO FLOODING THAT ARE PRONE TO FLOODING. |
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 00:00Z, 0.6 hours before the alert went out and 129 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.
- Mixed-layer CAPE
- 262 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 857 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
384
WGUS53 KLSX 020037
FFWLSX
ILC005-051-117-119-135-020630-
/O.NEW.KLSX.FF.W.0023.180702T0037Z-180702T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
737 PM CDT SUN JUL 1 2018
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Northwestern Bond County in south central Illinois...
Northeastern Madison County in southwestern Illinois...
Northwestern Fayette County in south central Illinois...
Southern Macoupin County in southwestern Illinois...
Montgomery County in south central Illinois...
* Until 130 AM CDT.
* At 736 PM CDT, Doppler radar indicated thunderstorms had produced
heavy rain across the warned area. Up to two inches of rain has
already fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Litchfield, Hillsboro, Staunton, Gillespie, Nokomis, Mount Olive,
Bunker Hill, Benld, Worden, Ramsey, Raymond, Witt, Livingston,
Taylor Springs, Coffeen, Alhambra, Shipman, Wilsonville, Schram
City and Sorento.
This includes Interstate 55 in Illinois between exits 30 and 63.
This also includes Ramsey Lake State Park and Lake Lou Yaeger.
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.
&&
LAT...LON 3883 8980 3912 9010 3944 8953 3935 8953
3935 8918 3930 8914 3922 8914 3921 8905
3917 8901
$$
Kanofsky2 follow-up statements
634
WGUS73 KLSX 020142
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
842 PM CDT SUN JUL 1 2018
ILC005-051-117-119-135-020630-
/O.CON.KLSX.FF.W.0023.000000T0000Z-180702T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Madison IL-Fayette IL-Macoupin IL-Montgomery IL-
842 PM CDT SUN JUL 1 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FOR
NORTHWESTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS...NORTHEASTERN
MADISON COUNTY IN SOUTHWESTERN ILLINOIS...NORTHWESTERN FAYETTE COUNTY
IN SOUTH CENTRAL ILLINOIS...SOUTHERN MACOUPIN COUNTY IN SOUTHWESTERN
ILLINOIS AND MONTGOMERY COUNTIES IN SOUTH CENTRAL ILLINOIS...
At 841 PM CDT, emergency management reported that part of Illinois
Route 16 in Hillsboro was closed at the railroad viaduct due to
flash flooding. Up to two inches of rain has already fallen over
this area.
Some locations that will experience flooding include...
Litchfield, Hillsboro, Staunton, Gillespie, Nokomis, Mount Olive,
Bunker Hill, Benld, Worden, Ramsey, Raymond, Witt, Livingston, Taylor
Springs, Coffeen, Alhambra, Shipman, Wilsonville, Schram City and
Sorento.
This includes Interstate 55 in Illinois between exits 30 and 63.
This also includes Ramsey Lake State Park and Lake Lou Yaeger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3883 8980 3912 9010 3944 8953 3935 8953
3935 8918 3930 8914 3922 8914 3921 8905
3917 8901
$$
Kanofsky383
WGUS73 KLSX 020637
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
137 AM CDT MON JUL 2 2018
ILC005-051-117-119-135-020647-
/O.EXP.KLSX.FF.W.0023.000000T0000Z-180702T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bond IL-Madison IL-Fayette IL-Macoupin IL-Montgomery IL-
137 AM CDT MON JUL 2 2018
...THE FLASH FLOOD WARNING FOR NORTHWESTERN BOND COUNTY IN SOUTH
CENTRAL ILLINOIS...NORTHEASTERN MADISON COUNTY IN SOUTHWESTERN
ILLINOIS...NORTHWESTERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
SOUTHERN MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS AND MONTGOMERY
COUNTIES IN SOUTH CENTRAL ILLINOIS HAS EXPIRED...
Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3883 8980 3912 9010 3944 8953 3935 8953
3935 8918 3930 8914 3922 8914 3921 8905
3917 8901
$$
ByrdThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 7:46 PM CDT | Special Weather Statement | LSX | Washington | 44 min |
| Jul 1, 8:16 PM CDT | Special Weather Statement | LSX | Clinton, Fayette | 44 min |
| Jul 1, 9:06 PM CDT | Areal Flood Advisory | LSX | Bond, Clinton, Fayette, Madison | 3 hr |
Nearby
Flash Flood Warnings in Illinois, 2018Every flash flood warning in 2018
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.