Alert archive / Illinois / Flash Flood Warnings in 2024
Flash Flood Warning 21, NWS Lincoln, IL
NWS Lincoln, IL issued this flash flood warning at Aug 30, 2024, 4:33 PM CDT for Sangamon County, Illinois. It was in force for 4 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 30, 2024, 4:33 PM CDT (21:33 UTC)
- Expired
- Aug 30, 2024, 8:04 PM CDT
- In force
- 4 hr
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Flood severity
- None
County Sangamon County, IL
The radar
The Lincoln radar (KILX), 52 km from the middle of the area, began a volume at 21:35 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 30, 4:38 PM CDT | RAIN 2.1 | 3 W Leland Grove, IL | Mesonet station GW3296 Springfield. |
| Aug 30, 4:53 PM CDT | FLASH FLOOD | Springfield, IL | Low lying areas and viaducts 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 12:00Z, 9.6 hours before the alert went out and 103 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
- 800 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 1552 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
895
WGUS53 KILX 302133
FFWILX
ILC167-310030-
/O.NEW.KILX.FF.W.0021.240830T2133Z-240831T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
433 PM CDT Fri Aug 30 2024
The National Weather Service in Lincoln has issued a
* Flash Flood Warning for...
Central Sangamon County in central Illinois...
* Until 730 PM CDT.
* At 430 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 1.5 inches of rain have
fallen. Additional rainfall amounts up to 1 inch 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...
Springfield, Illinois State Fairgrounds, Jerome, Southern View,
Leland Grove, Grandview and Curran.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3979 8980 3985 8961 3976 8956 3972 8979
FLASH FLOOD...RADAR INDICATED
$$
374 follow-up statements
661
WGUS73 KILX 302200
FFSILX
Flash Flood Statement
National Weather Service Lincoln IL
500 PM CDT Fri Aug 30 2024
ILC167-310030-
/O.CON.KILX.FF.W.0021.000000T0000Z-240831T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sangamon IL-
500 PM CDT Fri Aug 30 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM CDT THIS
EVENING FOR CENTRAL SANGAMON COUNTY...
At 500 PM CDT, emergency management reported viaducts flooding from
thunderstorms producing heavy rain across the warned area. Between
1.5 and 2 inches of rain have fallen. The expected rainfall rate is
1 to 2 inches in 1 hour. Additional rainfall amounts of 0.5 to 1
inch are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Springfield, Illinois State Fairgrounds, Jerome, Southern View,
Leland Grove, Grandview and Curran.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3979 8980 3985 8961 3976 8956 3972 8979
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Copple728
WGUS73 KILX 302203 CCA
FFSILX
Flash Flood Statement...CORRECTED
National Weather Service Lincoln IL
503 PM CDT Fri Aug 30 2024
ILC167-310030-
/O.COR.KILX.FF.W.0021.000000T0000Z-240831T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sangamon IL-
503 PM CDT Fri Aug 30 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM CDT THIS
EVENING FOR CENTRAL SANGAMON COUNTY...
At 500 PM CDT, emergency management reported viaducts flooding from
thunderstorms producing heavy rain across the warned area. Between
1.5 and 2 inches of rain have fallen. The thunderstorm producing the
heavy rainfall has moved off to the east. No additional rainfall is
expected at this time. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management 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...
Springfield, Illinois State Fairgrounds, Jerome, Southern View,
Leland Grove, Grandview and Curran.
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.
&&
LAT...LON 3979 8980 3985 8961 3976 8956 3972 8979
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Copple765
WGUS53 KILX 302355
FFWILX
ILC167-310200-
/O.EXT.KILX.FF.W.0021.000000T0000Z-240831T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
655 PM CDT Fri Aug 30 2024
The National Weather Service in Lincoln has extended the
* Flash Flood Warning for...
Central Sangamon County in central Illinois...
* Until 900 PM CDT.
* At 654 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 2 inches of rain have
fallen. Additional rainfall amounts up to 1 inch are possible in
the warned area as additional storms move into the area. Flash
flooding has already been reported.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Springfield, Illinois State Fairgrounds, Jerome, Southern View,
Leland Grove, Grandview and Curran.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3979 8980 3985 8961 3976 8956 3972 8979
FLASH FLOOD...RADAR INDICATED
$$
37955 WGUS73 KILX 310104 FFSILX Flash Flood Statement National Weather Service Lincoln IL 804 PM CDT Fri Aug 30 2024 ILC167-310114- /O.CAN.KILX.FF.W.0021.000000T0000Z-240831T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sangamon IL- 804 PM CDT Fri Aug 30 2024 ...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL SANGAMON COUNTY... The heavy rain has ended and flood waters have receded. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. && LAT...LON 3979 8980 3985 8961 3976 8956 3972 8979 $$ 37
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 2:56 PM CDT | Severe Thunderstorm Warning | ILX | Morgan, Scott | 34 min |
| Aug 30, 4:41 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Sangamon | 19 min |
| Aug 30, 4:59 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Macon | 31 min |
| Aug 30, 5:30 PM CDT | Special Weather Statement | ILX | Macon | 15 min |
| Aug 30, 5:41 PM CDT | Flash Flood Warning | ILX | Macon | 2 hr |
| Aug 30, 5:58 PM CDT | Special Weather Statement | ILX | Champaign, Piatt | 32 min |
| Aug 30, 6:12 PM CDT | Flash Flood Warning | ILX | Piatt | 3 hr |
| Aug 30, 6:38 PM CDT | Flash Flood Warning | ILX | Champaign | 3 hr |
| Aug 30, 6:50 PM CDT | Special Weather Statement | ILX | Champaign, Vermilion | 25 min |
Nearby
Flash Flood Warnings in Illinois, 2024Every flash flood warning in 2024
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.