Alert archive / Illinois / Flash Flood Warnings in 2025

Flash Flood Warning 13, NWS Lincoln, IL

July 19, 2025Macon County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 19, 2025, 10:57 AM CDT for Macon County, Illinois. It was in force for 3 hr. 8 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 19, 2025, 10:57 AM CDT (15:57 UTC)
Expired: Jul 19, 2025, 2:00 PM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Macon County, IL

The radar

The Lincoln radar (KILX), 48 km from the middle of the area, began a volume at 15:59 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 19, 11:39 AM CDT	RAIN 4.1	3 W Decatur, IL
Jul 19, 11:39 AM CDT	RAIN 4.1	3 W Decatur, IL
Jul 19, 12:17 PM CDT	FLOOD	1 S Decatur, IL	Street flooding reported in South Shores.
Jul 19, 12:17 PM CDT	FLOOD	1 S Decatur, IL	Street flooding reported in South Shores.
Jul 19, 12:17 PM CDT	FLOOD	Decatur, IL	10 inches of water reported on the north side of Staley Viaduct.
Jul 19, 12:17 PM CDT	FLOOD	Decatur, IL	10 inches of water reported on the north side of Staley Viaduct.
Jul 19, 12:17 PM CDT	FLOOD	Decatur, IL	Report of flooding on Pershing Rd. at N. Main and Water St.
Jul 19, 12:17 PM CDT	FLOOD	Decatur, IL	Report of flooding on Pershing Rd. at N. Main and Water St.

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, 4.0 hours before the alert went out and 42 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: 1117 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

585 
WGUS53 KILX 191557
FFWILX
ILC115-191900-
/O.NEW.KILX.FF.W.0013.250719T1557Z-250719T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
1057 AM CDT Sat Jul 19 2025

The National Weather Service in Lincoln has issued a

* Flash Flood Warning for...
  Central Macon County in central Illinois...

* Until 200 PM CDT.

* At 1056 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. 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.

* Some locations that will experience flash flooding include...
  Decatur and Decatur Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3983 8886 3982 8901 3988 8901 3990 8894
      3990 8890 3989 8887

FLASH FLOOD...RADAR INDICATED

$$

Knutsvig

2 follow-up statements

800 
WGUS73 KILX 191640
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
1140 AM CDT Sat Jul 19 2025

ILC115-191900-
/O.CON.KILX.FF.W.0013.000000T0000Z-250719T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Macon IL-
1140 AM CDT Sat Jul 19 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 PM CDT THIS 
AFTERNOON FOR CENTRAL MACON COUNTY...

At 1138 AM CDT, the public reported thunderstorms producing heavy 
rain across the warned area. Between 2 and 4.5 inches of rain have 
fallen. Rainfall of 4.1 inches was reported on the west side of 
Decatur. Additional rainfall amounts up to 2 inches are possible in 
the warned area. Flash flooding is ongoing or expected to begin 
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Public reported.

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

Some locations that will experience flash flooding include...
  Decatur and Decatur Airport.

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 3983 8886 3982 8901 3988 8901 3990 8894
      3990 8890 3989 8887

FLASH FLOOD...OBSERVED

$$

Knutsvig

296 
WGUS73 KILX 191852
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
152 PM CDT Sat Jul 19 2025

ILC115-191902-
/O.EXP.KILX.FF.W.0013.000000T0000Z-250719T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Macon IL-
152 PM CDT Sat Jul 19 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 2 PM CDT THIS AFTERNOON FOR 
CENTRAL MACON COUNTY...

Flood waters continue to recede and the heavy rain has ended. 
Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

&&

LAT...LON 3983 8886 3982 8901 3988 8901 3990 8894
      3990 8890 3989 8887

$$

Knutsvig

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 9:24 AM CDT	Special Weather Statement	ILX	Knox	36 min
Jul 19, 9:50 AM CDT	Special Weather Statement	ILX	Fulton	25 min
Jul 19, 10:12 AM CDT	Special Weather Statement	ILX	Cass, Fulton, Mason, Schuyler	33 min
Jul 19, 10:35 AM CDT	Areal Flood Advisory	ILX	Clay	3 hr
Jul 19, 10:42 AM CDT	Areal Flood Advisory	ILX	Fulton, Schuyler	3 hr
Jul 19, 10:50 AM CDT	Areal Flood Advisory	ILX	Christian, Logan, Macon, Menard, Moultrie, Piatt and 1 more	3 hr
Jul 19, 10:54 AM CDT	Special Weather Statement	ILX	DeWitt, Logan, Menard, Sangamon	51 min
Jul 19, 11:10 AM CDT	Flash Flood Warning	ILX	Clay	8 hr
Jul 19, 11:22 AM CDT	Special Weather Statement	ILX	Coles, Douglas, Moultrie	23 min

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.