Alert archive / Illinois / Flash Flood Warnings in 2018

Flash Flood Warning 29, NWS Lincoln, IL

September 8, 2018Clay County, Richland County, Illinois

NWS Lincoln, IL issued this flash flood warning at Sep 8, 2018, 2:16 AM CDT for Clay County, Richland County, Illinois. It was in force for 6 hr. 3 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
Sep 8, 2018, 2:16 AM CDT (07:16 UTC)
Expired
Sep 8, 2018, 8:15 AM CDT
In force
6 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

Counties Clay County, IL, Richland County, IL

The radar

The Evansville,IN radar (KVWX), 61 km from the middle of the area, began a volume at 07:18 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

TimeReportWhereRemark
Sep 8, 6:00 AM CDTHEAVY RAIN 2.212 S Olney, IL24-HOUR TOTAL
Sep 8, 6:00 AM CDTHEAVY RAIN 4.826 Sse Clay City, IL24-HOUR TOTAL
Sep 8, 7:00 AM CDTHEAVY RAIN 3.431 E Olney, IL24-HOUR TOTAL

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, 7.3 hours before the alert went out and 170 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 2018-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 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 2018-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.1939Sfc1 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
32 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
547 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
-43 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

767 
WGUS53 KILX 080716
FFWILX
ILC025-159-081315-
/O.NEW.KILX.FF.W.0029.180908T0716Z-180908T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
216 AM CDT SAT SEP 8 2018

The National Weather Service in Lincoln has issued a

* Flash Flood Warning for...
  Richland County in southeastern Illinois...
  Eastern Clay County in south central Illinois...

* Until 815 AM CDT Saturday.

* At 214 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have 
  already fallen in the past hour. Flash flooding is expected to 
  begin shortly.

* Some locations that will experience flooding include...
  Olney, Flora, Clay City, Noble, Parkersburg, Claremont, Calhoun,
  Sailor Springs, Schnell, Dundas, Ingraham, Wakefield, Wendelin,
  Berryville and Olney Noble Airport.

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area early this morning.

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 3857 8814 3860 8816 3860 8847 3861 8849
      3885 8843 3885 8791 3857 8791

$$

37
2 follow-up statements
673 
WGUS73 KILX 080924
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
424 AM CDT SAT SEP 8 2018

ILC025-159-081315-
/O.CON.KILX.FF.W.0029.000000T0000Z-180908T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Richland-Clay-
424 AM CDT SAT SEP 8 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM CDT FOR
RICHLAND AND EASTERN CLAY COUNTIES...

At 419 AM CDT, Doppler radar indicated showers of heavy rain 
continuing across the warned area. Up to 5 inches of rain have 
already fallen in a band near the Richland and Clay County line. 
Flash flooding is expected.

Some locations that will experience flooding include...
Olney, Flora, Clay City, Noble, Parkersburg, Claremont, Calhoun,
Sailor Springs, Schnell, Dundas, Ingraham, Wakefield, Wendelin,
Berryville and Olney Noble Airport.

Additional rainfall amounts of another inch are possible in the 
warned area, especially in Richland County.

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 3857 8814 3860 8816 3860 8847 3861 8849
      3885 8843 3885 8791 3857 8791

$$

37
697 
WGUS73 KILX 081313
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
813 AM CDT SAT SEP 8 2018

ILC025-159-081322-
/O.EXP.KILX.FF.W.0029.000000T0000Z-180908T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Richland-Clay-
813 AM CDT SAT SEP 8 2018

...THE FLASH FLOOD WARNING FOR RICHLAND AND EASTERN CLAY COUNTIES
WILL EXPIRE AT 815 AM CDT...

The heavy rain and flooding from overnight has receded, therefore 
flash flooding is not expected to pose an immediate threat. However, 
additional heavy rain is expected later today and may produce 
additional flooding. Please continue to heed any remaining road 
closures.

LAT...LON 3857 8814 3860 8816 3860 8847 3861 8849
      3885 8843 3885 8791 3857 8791

$$

37

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 8, 3:29 AM CDTFlash Flood WarningILXJasper4 hr
Sep 8, 5:47 AM CDTFlash Flood WarningILXClark, Crawford3 hr
Sep 8, 7:46 AM CDTAreal Flood AdvisoryILXLawrence3 hr
Sep 8, 9:36 AM CDTAreal Flood WarningILXClark, Clay, Crawford, Effingham, Jasper, Lawrence and 1 more9 hr
Sep 8, 10:31 AM CDTRiver Flood WarningILXCrawford, Jasper18 hr
Sep 8, 1:40 PM CDTFlash Flood WarningILXClay, Crawford, Jasper, Lawrence, Richland4 hr
Sep 8, 6:17 PM CDTAreal Flood WarningILXClay, Crawford, Effingham, Jasper, Lawrence, Richland12 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.