Alert archive / Illinois / Flash Flood Warnings in 2021
Flash Flood Warning 15, NWS Lincoln, IL
NWS Lincoln, IL issued this flash flood warning at Jul 11, 2021, 6:00 PM CDT for Logan County, Illinois. It was in force for 5 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
- Jul 11, 2021, 6:00 PM CDT (23:00 UTC)
- Expired
- Jul 11, 2021, 11:00 PM CDT
- In force
- 5 hr
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Flood severity
- None
County Logan County, IL
The radar
The Lincoln radar (KILX), 7 km from the middle of the area, began a volume at 23:03 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 11, 6:38 PM CDT | FLASH FLOOD | Mount Pulaski, IL | ESTIMATED WATER NEAR 1 FOOT DEEP ON SEVERAL ROADS IN TOWN. |
| Jul 11, 7:00 PM CDT | HEAVY RAIN 3.77 | Mount Pulaski, IL | RAINFALL SINCE 530 PM. |
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, 11.0 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
- 307 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 520 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
460
WGUS53 KILX 112300
FFWILX
ILC107-120200-
/O.NEW.KILX.FF.W.0015.210711T2300Z-210712T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
600 PM CDT Sun Jul 11 2021
The National Weather Service in Lincoln has issued a
* Flash Flood Warning for...
Southeastern Logan County in central Illinois...
* Until 900 PM CDT.
* At 559 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...
Lincoln and Mount Pulaski.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4020 8938 4020 8925 3992 8925 3992 8939
FLASH FLOOD...RADAR INDICATED
$$
MJA3 follow-up statements
679
WGUS73 KILX 120059
FFSILX
Flash Flood Statement
National Weather Service Lincoln IL
759 PM CDT Sun Jul 11 2021
ILC107-120200-
/O.CON.KILX.FF.W.0015.000000T0000Z-210712T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Logan IL-
759 PM CDT Sun Jul 11 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING
FOR SOUTH CENTRAL LOGAN COUNTY...
At 756 PM CDT, local law enforcement reported urban flooding in
Mount Pulaski. Between 3 and 5 inches of rain have fallen over much
of the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
Some locations that will experience flash flooding include...
Lincoln and Mount Pulaski.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4020 8938 4011 8925 3992 8925 3992 8939
FLASH FLOOD...OBSERVED
$$
37124
WGUS53 KILX 120150
FFWILX
ILC107-120400-
/O.EXT.KILX.FF.W.0015.000000T0000Z-210712T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
850 PM CDT Sun Jul 11 2021
The National Weather Service in Lincoln has extended the
* Flash Flood Warning for...
South Central Logan County in central Illinois...
* Until 1100 PM CDT.
* At 849 PM CDT, local law enforcement reported areas of flooding on
State Route 121 near Mount Pulaski as well as urban flooding in
Mount Pulaski. Between 2.5 and 4.5 inches of rain have fallen.
Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement.
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...
Lincoln and Mount Pulaski.
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.
&&
LAT...LON 4020 8938 4011 8925 3992 8925 3992 8939
FLASH FLOOD...OBSERVED
$$
37862 WGUS73 KILX 120353 FFSILX Flash Flood Statement National Weather Service Lincoln IL 1053 PM CDT Sun Jul 11 2021 ILC107-120403- /O.EXP.KILX.FF.W.0015.000000T0000Z-210712T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Logan IL- 1053 PM CDT Sun Jul 11 2021 ...FLASH FLOOD WARNING WILL EXPIRE AT 11 PM CDT THIS EVENING FOR SOUTH CENTRAL LOGAN COUNTY... The heavy rain has ended. Flash flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. LAT...LON 4020 8938 4011 8925 3992 8925 3992 8939 $$ 37
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 3:31 PM CDT | Flash Flood Warning | ILX | Schuyler | 3 hr |
| Jul 11, 5:07 PM CDT | Flash Flood Warning | ILX | Logan, Mason, Menard | 6 hr |
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.