Alert archive / Illinois / Flash Flood Warnings in 2025

Flash Flood Warning 21, NWS Lincoln, IL

August 4, 2025Crawford County, Lawrence County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 4, 2025, 4:43 PM CDT for Crawford County, Lawrence County, Illinois. It was in force for 3 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: Aug 4, 2025, 4:43 PM CDT (21:43 UTC)
Expired: Aug 4, 2025, 7:45 PM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Crawford County, IL, Lawrence County, IL

The radar

The Evansville,IN radar (KVWX), 70 km from the middle of the area, began a volume at 21:44 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
Aug 4, 5:58 PM CDT	RAIN 2.44	Lawrenceville Airport, IL	ASOS station KLWV Lawrenceville AP.
Aug 4, 6:00 PM CDT	FLASH FLOOD	2 N Lawrenceville, IL	Water was reported up to 3 feet deep along route 1 on the north side of Lawrenceville. Time estimated.

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, 9.7 hours before the alert went out and 163 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: 19 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1293 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

157 
WGUS53 KILX 042143
FFWILX
ILC033-101-050045-
/O.NEW.KILX.FF.W.0021.250804T2143Z-250805T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
443 PM CDT Mon Aug 4 2025

The National Weather Service in Lincoln has issued a

* Flash Flood Warning for...
  Crawford County in east central Illinois...
  Lawrence County in southeastern Illinois...

* Until 745 PM CDT.

* At 443 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 3.5 inches of 
  rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 
  hour. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3917 8766 3915 8763 3911 8765 3906 8757
      3899 8756 3899 8758 3896 8751 3886 8755
      3878 8750 3877 8751 3874 8750 3868 8753
      3864 8762 3859 8761 3857 8764 3857 8791
      3885 8791 3885 8795 3917 8795

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

25

1 follow-up statement

427 
WGUS73 KILX 050037
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
737 PM CDT Mon Aug 4 2025

ILC033-101-050047-
/O.EXP.KILX.FF.W.0021.000000T0000Z-250805T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Crawford IL-Lawrence IL-
737 PM CDT Mon Aug 4 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM CDT THIS EVENING FOR 
CRAWFORD AND LAWRENCE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 3917 8766 3915 8763 3911 8765 3906 8757
      3899 8756 3899 8758 3896 8751 3886 8755
      3878 8750 3877 8751 3874 8750 3868 8753
      3864 8762 3859 8761 3857 8764 3857 8791
      3885 8791 3885 8795 3917 8795

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 3:39 PM CDT	Areal Flood Advisory	ILX	Clark, Crawford, Jasper, Lawrence, Richland	3 hr

Nearby

Flash Flood Warnings in Illinois, 2025 Every flash flood warning in 2025

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.