Alert archive / Illinois / Flash Flood Warnings in 2021
Flash Flood Warning 25, NWS Lincoln, IL
NWS Lincoln, IL issued this flash flood warning at Aug 8, 2021, 5:35 PM CDT for McLean County, Illinois. It was in force for 3 hr. 5 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 8, 2021, 5:35 PM CDT (22:35 UTC)
- Expired
- Aug 8, 2021, 8:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Flood severity
- None
County McLean County, IL
The radar
The Lincoln radar (KILX), 46 km from the middle of the area, began a volume at 22:35 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 8, 5:50 PM CDT | FLASH FLOOD | 2 Nne Danvers, IL | CARLOCK DANVERS BLACKTOP UNDER WATER FROM HEAVY RAINS. |
| Aug 8, 6:35 PM CDT | FLASH FLOOD | Danvers, IL | FLOODED ROADS IN DANVERS AREA. |
| Aug 8, 7:00 PM CDT | FLASH FLOOD | Carlock, IL | SOME FLOODED VEHICLES ALONG HIGHWAY 150 BETWEEN CARLOCK AND BLOOMINGTON. |
| Aug 8, 8:30 PM CDT | HEAVY RAIN 8.25 | Danvers, IL | FLOODED VEHICLES ON S. WEST STREET. |
| Aug 8, 8:45 PM CDT | HEAVY RAIN 5.09 | Carlock, IL | RAINFALL PAST 4 HOURS. SOME UNUSUAL FLOODING IN CARLOCK. |
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, 10.6 hours before the alert went out and 62 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
- 310 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
484
WGUS53 KILX 082235
FFWILX
ILC113-090145-
/O.NEW.KILX.FF.W.0025.210808T2235Z-210809T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
535 PM CDT Sun Aug 8 2021
The National Weather Service in Lincoln has issued a
* Flash Flood Warning for...
West Central McLean County in central Illinois...
* Until 845 PM CDT.
* At 535 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 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...
Normal, Hudson, Danvers and Carlock.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4044 8926 4054 8926 4065 8896 4058 8892
FLASH FLOOD...RADAR INDICATED
$$
372 follow-up statements
864
WGUS73 KILX 082303
FFSILX
Flash Flood Statement
National Weather Service Lincoln IL
603 PM CDT Sun Aug 8 2021
ILC113-090145-
/O.CON.KILX.FF.W.0025.000000T0000Z-210809T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McLean IL-
603 PM CDT Sun Aug 8 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM CDT THIS
EVENING FOR WEST CENTRAL MCLEAN COUNTY...
At 600 PM CDT, emergency management reported flooding between
Danvers and Carlock, with water over the Carlock Danvers Blacktop
submerged. Between 2 and 4 inches of rain have fallen. Additional
rainfall amounts up to 2 inches are possible in the warned area.
Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Normal, Hudson, Danvers and Carlock.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4044 8926 4054 8926 4065 8896 4058 8892
FLASH FLOOD...OBSERVED
$$
37089 WGUS73 KILX 090140 FFSILX Flash Flood Statement National Weather Service Lincoln IL 840 PM CDT Sun Aug 8 2021 ILC113-090150- /O.EXP.KILX.FF.W.0025.000000T0000Z-210809T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ McLean IL- 840 PM CDT Sun Aug 8 2021 ...FLASH FLOOD WARNING WILL EXPIRE AT 845 PM CDT THIS EVENING FOR WEST CENTRAL MCLEAN COUNTY... Flood waters have receded. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4044 8926 4054 8926 4065 8896 4058 8892 $$ Auten
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 2:21 PM CDT | Special Weather Statement | ILX | McLean | 24 min |
| Aug 8, 3:30 PM CDT | Special Weather Statement | ILX | McLean | 30 min |
| Aug 8, 4:29 PM CDT | Special Weather Statement | ILX | Morgan | 31 min |
| Aug 8, 4:45 PM CDT | Areal Flood Advisory | ILX | McLean | 2 hr |
| Aug 8, 4:54 PM CDT | Special Weather Statement | ILX | Menard | 36 min |
| Aug 8, 5:02 PM CDT | Special Weather Statement | ILX | Woodford | 28 min |
| Aug 8, 5:05 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Mason, Menard | 25 min |
| Aug 8, 5:14 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Tazewell, Woodford | 46 min |
| Aug 8, 5:29 PM CDT | Special Weather Statement | ILX | Sangamon | 31 min |
| Aug 8, 5:46 PM CDT | Special Weather Statement | ILX | Sangamon | 29 min |
Nearby
Flash Flood Warnings in Illinois, 2021Every 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.