Alert archive / Illinois / Flash Flood Warnings in 2021
Flash Flood Warning 3, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Jun 26, 2021, 3:57 PM CDT for 5 counties in Illinois; Lake County, Indiana. It was in force for 6 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
- Jun 26, 2021, 3:57 PM CDT (20:57 UTC)
- Expired
- Jun 26, 2021, 10:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, Livingston County, IL, Lake County, IN
The radar
The Chicago radar (KLOT), 83 km from the middle of the area, began a volume at 21:01 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 |
|---|---|---|---|
| Jun 26, 6:00 PM CDT | FLASH FLOOD | 1 E Saunemin, IL | ROUTE 116 NEAR SAUNEMIN CLOSED DUE TO FLOODING. |
| Jun 26, 6:00 PM CDT | FLASH FLOOD | 3 W Chatsworth, IL | E 900 RD N BETWEEN FORREST AND CHATSWORTH CLOSED DUE TO 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, 9.0 hours before the alert went out and 85 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
- 683 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 684 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 263 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.1
The text
As transmitted.
603
WGUS53 KLOT 262057
FFWLOT
ILC053-063-075-091-105-INC089-270300-
/O.NEW.KLOT.FF.W.0003.210626T2057Z-210627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Chicago IL
357 PM CDT Sat Jun 26 2021
The National Weather Service in Chicago has issued a
* Flash Flood Warning for...
Livingston County in central Illinois...
Western Ford County in east central Illinois...
Northwestern Iroquois County in east central Illinois...
Southeastern Grundy County in northeastern Illinois...
Kankakee County in northeastern Illinois...
Southwestern Lake IN County in northwestern Indiana...
* Until 1000 PM CDT Saturday.
* At 357 PM CDT, doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding.
SOURCE...Doppler radar.
IMPACT...Rapid-onset 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...
Kankakee, Bourbonnais, Bradley, Channahon, Pontiac, Manteno,
Braidwood, Coal City, Dwight, Fairbury, Gibson City, Momence,
Herscher, Clifton, Chatsworth, Diamond, Limestone, Gardner, Grant
Park and Forrest.
Additional rainfall amounts of 1 to 3 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.
A Flash Flood Warning means rapid-onset flooding is imminent or may
already be occurring. Persons along creeks, drainage ditches, and
other waterways should take immediate precautions to protect life
and property.
&&
LAT...LON 4075 8891 4142 8825 4120 8824 4121 8801
4129 8800 4130 8752 4040 8844 4040 8846
4061 8846 4061 8857 4076 8858
FLASH FLOOD...RADAR INDICATED
$$
Birk4 follow-up statements
193
WGUS73 KLOT 262234
FFSLOT
Flash Flood Statement
National Weather Service Chicago IL
534 PM CDT Sat Jun 26 2021
ILC053-063-075-091-105-INC089-270300-
/O.CON.KLOT.FF.W.0003.000000T0000Z-210627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ford IL-Grundy IL-Iroquois IL-Kankakee IL-Livingston IL-Lake IN IN-
534 PM CDT Sat Jun 26 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING FOR LIVINGSTON, WESTERN FORD, NORTHWESTERN IROQUOIS,
SOUTHEASTERN GRUNDY, KANKAKEE AND SOUTHWESTERN LAKE IN COUNTIES...
At 534 PM CDT, Doppler radar estimated that between 2 and 4 inches
of rain have fallen this afternoon in addition to several inches of
rain over the past few days. Flash flooding is likely ongoing across
much of the warned area. The heavy rain has ended across most of the
warned area, with light to moderate rain occurring.
HAZARD...Flash flooding.
SOURCE...Doppler radar.
IMPACT...Rapid-onset flooding of small creeks and streams, urban
areas, highways, streets and underpasses, farmland, and
other poor drainage and low lying areas.
Some locations that will experience flash flooding include...
Kankakee, Bourbonnais, Bradley, Channahon, Pontiac, Manteno,
Braidwood, Coal City, Dwight, Fairbury, Gibson City, Momence,
Herscher, Clifton, Chatsworth, Diamond, Limestone, Gardner, Grant
Park and Forrest.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles. Do not attempt to walk across any flooded
roads or fields.
&&
LAT...LON 4075 8891 4142 8825 4120 8824 4121 8801
4129 8800 4130 8752 4040 8844 4040 8846
4061 8846 4061 8857 4076 8858
FLASH FLOOD...RADAR INDICATED
$$
RC934
WGUS73 KLOT 262334
FFSLOT
Flash Flood Statement
National Weather Service Chicago IL
634 PM CDT Sat Jun 26 2021
ILC053-063-075-091-105-INC089-270300-
/O.CON.KLOT.FF.W.0003.000000T0000Z-210627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ford IL-Grundy IL-Iroquois IL-Kankakee IL-Livingston IL-Lake IN IN-
634 PM CDT Sat Jun 26 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING FOR LIVINGSTON, WESTERN FORD, NORTHWESTERN IROQUOIS,
SOUTHEASTERN GRUNDY, KANKAKEE AND SOUTHWESTERN LAKE IN COUNTIES...
At 634 PM CDT, Trained weather spotters reported flash flooding
occurring in Chatsworth. Between 2 and 4 inches of rain fell during
the afternoon in addition to the several inches of rain that fell
over the past few days. Flash flooding is ongoing across much of the
warned area.
HAZARD...Flash flooding.
SOURCE...Trained spotters.
IMPACT...Rapid-onset 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...
Kankakee, Bourbonnais, Bradley, Channahon, Pontiac, Manteno,
Braidwood, Coal City, Dwight, Fairbury, Gibson City, Momence,
Herscher, Clifton, Chatsworth, Diamond, Limestone, Gardner, Grant
Park and Forrest.
Rivers and streams around Chatsworth are out of their banks and
numerous roads are barricaded.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Expect flash flooding of creeks, ditches, canals, and storm sewers,
as well roadways, underpasses, farmland, and other poor drainage
areas.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles. Do not attempt to walk across any flooded
roads or fields.
&&
LAT...LON 4075 8891 4142 8825 4120 8824 4121 8801
4129 8800 4130 8752 4040 8844 4040 8846
4061 8846 4061 8857 4076 8858
FLASH FLOOD...OBSERVED
$$
RC216
WGUS73 KLOT 270148
FFSLOT
Flash Flood Statement
National Weather Service Chicago IL
848 PM CDT Sat Jun 26 2021
ILC053-063-075-091-105-INC089-270300-
/O.CON.KLOT.FF.W.0003.000000T0000Z-210627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ford IL-Grundy IL-Iroquois IL-Kankakee IL-Livingston IL-Lake IN IN-
848 PM CDT Sat Jun 26 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING FOR LIVINGSTON, NORTH CENTRAL FORD, NORTHWESTERN IROQUOIS,
SOUTHEASTERN GRUNDY, KANKAKEE AND SOUTHWESTERN LAKE IN COUNTIES...
At 848 PM CDT, Trained weather spotters reported flash flooding
occurring in portions of the warned area. Between 2 and 4 inches of
rain fell during the afternoon in addition to the several inches of
rain that fell over the past few days.
HAZARD...Flash flooding.
SOURCE...Trained spotters.
IMPACT...Rapid-onset flooding of small creeks and streams, urban
areas, highways, streets and underpasses, farmland, and
other poor drainage and low lying areas.
Some locations that will experience flash flooding include...
Kankakee, Bourbonnais, Bradley, Channahon, Pontiac, Manteno,
Braidwood, Coal City, Dwight, Fairbury, Herscher, Chatsworth,
Diamond, Limestone, Gardner, Grant Park, Forrest, Odell, Mazon and
Braceville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Expect flash flooding of creeks, ditches, canals, and storm sewers,
as well roadways, underpasses, farmland, and other poor drainage
areas.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles. Do not attempt to walk across any flooded
roads or fields.
&&
LAT...LON 4075 8891 4142 8825 4120 8824 4121 8801
4129 8800 4130 8752 4061 8846 4061 8857
4076 8858
FLASH FLOOD...OBSERVED
$$
Kluber036
WGUS73 KLOT 270255
FFSLOT
Flash Flood Statement
National Weather Service Chicago IL
955 PM CDT Sat Jun 26 2021
ILC053-063-075-091-105-INC089-270305-
/O.EXP.KLOT.FF.W.0003.000000T0000Z-210627T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ford IL-Grundy IL-Iroquois IL-Kankakee IL-Livingston IL-Lake IN IN-
955 PM CDT Sat Jun 26 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 10 PM CDT THIS EVENING FOR
LIVINGSTON, NORTH CENTRAL FORD, NORTHWESTERN IROQUOIS, SOUTHEASTERN
GRUNDY, KANKAKEE AND SOUTHWESTERN LAKE IN COUNTIES...
The heavy rain has ended, with little to no additional rain expected
tonight. Where ongoing flooding impacts continue, a Flood Advisory
replaces the Flash Flood Warning. Please continue to heed remaining
road closures.
LAT...LON 4075 8891 4142 8825 4120 8824 4121 8801
4129 8800 4130 8752 4061 8846 4061 8857
4076 8858
$$
KluberThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 8:01 PM CDT | Tornado Warning | LOT | Iroquois | 31 min |
| Jun 25, 8:11 PM CDT | Tornado Warning | LOT | Iroquois | 22 min |
| Jun 25, 8:37 PM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Kankakee, Livingston | 5 hr |
| Jun 25, 9:11 PM CDT | Special Weather Statement | LOT | Ford | 64 min |
| Jun 25, 10:39 PM CDT | Special Weather Statement | LOT | Ford | 66 min |
| Jun 26, 11:27 AM CDT | Tornado Warning | LOT | Livingston | 18 min |
| Jun 26, 11:34 AM CDT | Tornado Warning | LOT | Will | 26 min |
| Jun 26, 11:44 AM CDT | Tornado Warning | LOT | Grundy, LaSalle, Livingston | 36 min |
| Jun 26, 11:49 AM CDT | Tornado Warning | LOT | Cook | 26 min |
| Jun 26, 11:55 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 26, 12:18 PM CDT | Flash Flood Warning | LOT | Cook, DuPage, Will | 6 hr |
| Jun 26, 12:33 PM CDT | Special Marine Warning | LOT | 117 min | |
| Jun 26, 12:34 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 41 min |
| Jun 26, 12:59 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 11 min |
| Jun 26, 1:26 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 34 min |
| Jun 26, 2:08 PM CDT | Tornado Warning | LOT | Cook, Will | 25 min |
| Jun 26, 2:24 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 26, 2:43 PM CDT | Areal Flood Advisory | LOT | Cook, Ford, Grundy, Iroquois, Kankakee, LaSalle and 2 more | 6 hr |
| Jun 26, 3:31 PM CDT | Special Marine Warning | LOT | 119 min | |
| Jun 26, 3:34 PM CDT | Tornado Warning | LOT | Livingston | 41 min |
| Jun 26, 3:50 PM CDT | Flash Flood Warning | LOT | Cook, Grundy, Kankakee, Will | 6 hr |
| Jun 26, 3:56 PM CDT | Tornado Warning | LOT | Kankakee, Will | 34 min |
| Jun 26, 3:57 PM CDT | Tornado Warning | LOT | Grundy, Kankakee, Livingston | 33 min |
| Jun 26, 4:13 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 47 min |
| Jun 26, 4:23 PM CDT | Tornado Warning | LOT | Ford, Livingston | 36 min |
| Jun 26, 4:26 PM CDT | River Flood Warning | LOT | Cook | 28 hr |
| Jun 26, 4:26 PM CDT | Tornado Warning | LOT | Cook, Will | 34 min |
| Jun 26, 4:30 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 26, 4:41 PM CDT | Tornado Warning | LOT | Kankakee | 34 min |
| Jun 26, 4:49 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Kankakee, Will | 56 min |
| Jun 26, 5:21 PM CDT | Severe Thunderstorm Warning | LOT | Will | 54 min |
| Jun 26, 5:44 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 76 min |
| Jun 26, 5:54 PM CDT | Areal Flood Advisory | LOT | Ford, Iroquois, Livingston | 3 hr |
| Jun 26, 6:23 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Will | 7 hr |
| Jun 26, 6:55 PM CDT | River Flood Warning | LOT | Livingston | 3 days |
| Jun 26, 1:56 PM CDT | Special Weather Statement | LOT | Porter | 34 min |
| Jun 26, 2:27 PM CDT | Severe Thunderstorm Warning | LOT | Jasper, Lake, Newton, Porter | 48 min |
| Jun 26, 5:19 PM CDT | Tornado Warning | LOT | Lake, Porter | 13 min |
| Jun 26, 6:14 PM CDT | Severe Thunderstorm Warning | LOT | Benton, Jasper, Newton | 76 min |
Nearby
Flash Flood Warnings in Illinois, 2021Flash Flood Warnings in Indiana, 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.