Alert archive / Illinois / Flash Flood Warnings in 2021

Flash Flood Warning 21, NWS Lincoln, IL

July 15, 2021Coles County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 15, 2021, 7:35 PM CDT for Coles County, Illinois. It was in force for 4 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: Jul 15, 2021, 7:35 PM CDT (00:35 UTC)
Expired: Jul 15, 2021, 11:45 PM CDT
In force: 4 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Coles County, IL

The radar

The Lincoln radar (KILX), 111 km from the middle of the area, began a volume at 00:39 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 15, 10:00 PM CDT	HEAVY RAIN 1.63	Coles County Airport, IL	TOTAL SO FAR TODAY, STILL RAINING.

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 72 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: 8 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 1218 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

150 
WGUS53 KILX 160035
FFWILX
ILC029-160445-
/O.NEW.KILX.FF.W.0021.210716T0035Z-210716T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
735 PM CDT Thu Jul 15 2021

The National Weather Service in Lincoln has issued a

* Flash Flood Warning for...
  Central Coles County in east central Illinois...

* Until 1145 PM CDT.

* At 735 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Charleston, Mattoon, Ashmore, Rardin, Cooks Mill, Coles, 
  Fairgrange, Coles County Airport and Bushton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3958 8847 3963 8797 3950 8797 3945 8847
      3951 8847

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 3 HOURS 

$$

Shimon

1 follow-up statement

834 
WGUS73 KILX 160439
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
1139 PM CDT Thu Jul 15 2021

ILC029-160449-
/O.EXP.KILX.FF.W.0021.000000T0000Z-210716T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coles IL-
1139 PM CDT Thu Jul 15 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1145 PM CDT THIS EVENING FOR 
CENTRAL COLES COUNTY...

Flood waters have receded. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3958 8847 3963 8797 3950 8797 3945 8847
      3951 8847

$$

Shimon

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 7:04 AM CDT	Flash Flood Warning	ILX	McLean	4 hr
Jul 16, 7:16 AM CDT	River Flood Warning	ILX	Fulton, Knox	10 hr
Jul 16, 9:40 AM CDT	River Flood Warning	ILX	Crawford, Jasper	23 hr
Jul 16, 9:41 AM CDT	Flash Flood Warning	ILX	McLean	4 hr
Jul 16, 9:43 AM CDT	River Flood Warning	ILX	Lawrence	5 days
Jul 16, 11:37 AM CDT	Areal Flood Advisory	ILX	Cass, Fulton, Mason, Menard, Schuyler, Tazewell	3 hr
Jul 16, 1:35 PM CDT	Areal Flood Warning	ILX	DeWitt, Logan, McLean	24 hr
Jul 16, 5:47 PM CDT	Flash Flood Warning	ILX	Clay, Crawford, Effingham, Jasper, Lawrence, Richland	4 hr

Nearby

Flash Flood Warnings in Illinois, 2021 Every flash flood warning in 2021

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.