Alert archive / Illinois / Flash Flood Warnings in 2016
Flash Flood Warning 13, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at Aug 12, 2016, 5:51 PM CDT for 4 counties in Illinois. It was in force for 6 hr. 3 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 12, 2016, 5:51 PM CDT (22:51 UTC)
- Expired
- Aug 12, 2016, 11:45 PM CDT
- In force
- 6 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cook County, IL, Grundy County, IL, Kendall County, IL, Will County, IL
The radar
The Chicago radar (KLOT), 10 km from the middle of the area, began a volume at 22:54 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 12, 7:13 PM CDT | HEAVY RAIN 2.3 | 2 Sse Plainfield, IL | 2.30 INCHES IN THE PAST 2 HOURS. |
| Aug 12, 9:27 PM CDT | HEAVY RAIN 3.2 | 2 N Joliet, IL | |
| Aug 12, 9:40 PM CDT | HEAVY RAIN 3.38 | Romeoville, IL | RAINFALL TODAY THUS FAR AT NWS CHICAGO AS OF 940 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, 10.9 hours before the alert went out and 162 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
- 1247 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
263
WGUS53 KLOT 122251
FFWLOT
ILC031-063-093-197-130445-
/O.NEW.KLOT.FF.W.0013.160812T2251Z-160813T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
551 PM CDT FRI AUG 12 2016
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
KENDALL COUNTY IN NORTHEASTERN ILLINOIS...
NORTHERN GRUNDY COUNTY IN NORTHEASTERN ILLINOIS...
NORTHWESTERN WILL COUNTY IN NORTHEASTERN ILLINOIS...
SOUTH CENTRAL COOK COUNTY IN NORTHEASTERN ILLINOIS...
* UNTIL 1145 PM CDT
* AT 550 PM CDT...DOPPLER RADAR INDICATED SLOW MOVING AND TRAINING
THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS THE WARNED AREA.
THESE STORMS WILL PRODUCE 2 INCH PER HOUR RATES AT TIMES INTO THE
EARLY EVENING HOURS. ISOLATED AREAS WITHIN THE WARNING COULD END
UP WITH 3 TO 4 INCHES OF RAINFALL THROUGH THIS EVENING. FLASH
FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AURORA...JOLIET...NAPERVILLE...BOLINGBROOK...ORLAND PARK...
TINLEY PARK...ROMEOVILLE...PLAINFIELD...OSWEGO...LOCKPORT...
NEW LENOX...HOMER GLEN...MOKENA...YORKVILLE...LEMONT...CHANNAHON...
MINOOKA...INGALLS PARK...WOODRIDGE AND SHOREWOOD.
INCLUDING THE FOLLOWING INTERSTATES...
I-55 BETWEEN MILE MARKERS 244 AND 269.
I-80 BETWEEN MILE MARKERS 114 AND 148.
I-355 BETWEEN MILE MARKERS 1 AND 11...AND BETWEEN MILE MARKERS 13 AND
14.
THIS INCLUDES... UNIVERSITY OF ST. FRANCIS...CHANNAHON STATE PARK...
CHICAGOLAND SPEEDWAY ROUTE 66 RACEWAY...GRUNDY COUNTY SPEEDWAY AND
FAIRGROUNDS...JOLIET JUNIOR COLLEGE...JOLIET SLAMMERS BASEBALL...AND
LEWIS UNIVERSITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4137 8825 4145 8860 4158 8860 4172 8826
4173 8803 4169 8803 4169 8796 4156 8777
$$
BIRK3 follow-up statements
284
WGUS73 KLOT 122356
FFSLOT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
656 PM CDT FRI AUG 12 2016
ILC031-063-093-197-130445-
/O.CON.KLOT.FF.W.0013.000000T0000Z-160813T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENDALL IL-GRUNDY IL-WILL IL-COOK IL-
656 PM CDT FRI AUG 12 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR
KENDALL...NORTHERN GRUNDY...NORTHWESTERN WILL AND SOUTH CENTRAL COOK
COUNTIES...
AT 654 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS
PRODUCING MODERATE TO HEAVY RAIN ACROSS THE WARNED AREA.
RADAR ESTIMATES THAT 2 TO 3 INCHES OF RAIN HAS FALLEN ACROSS
PORTIONS OF THE WARNED AREA. RUNOFF FROM THIS RAINFALL WILL CONTINUE
TO RESULT IN AREAS OF FLASH FLOODING.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AURORA...JOLIET...NAPERVILLE...BOLINGBROOK...ORLAND PARK...
TINLEY PARK...ROMEOVILLE...PLAINFIELD...OSWEGO...LOCKPORT...
NEW LENOX...HOMER GLEN...MOKENA...YORKVILLE...LEMONT...CHANNAHON...
MINOOKA...INGALLS PARK...WOODRIDGE AND SHOREWOOD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4137 8825 4145 8860 4158 8860 4172 8826
4173 8803 4169 8803 4169 8796 4156 8777
$$
BIRK774
WGUS73 KLOT 130142
FFSLOT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
842 PM CDT FRI AUG 12 2016
ILC031-063-093-197-130445-
/O.CON.KLOT.FF.W.0013.000000T0000Z-160813T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENDALL IL-GRUNDY IL-WILL IL-COOK IL-
842 PM CDT FRI AUG 12 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR
KENDALL...NORTHERN GRUNDY...NORTHWESTERN WILL AND SOUTH CENTRAL COOK
COUNTIES...
AT 837 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE SCATTERED
SHOWERS AND EMBEDDED THUNDERSTORMS PRODUCING MODERATE TO HEAVY RAIN
ACROSS THE WARNED AREA. RADAR ESTIMATES THAT 2 TO 4 INCHES OF RAIN
HAS FALLEN ACROSS SOUTHERN KENDALL...NORTHERN GRUNDY AND WESTERN
PORTIONS OF WILL COUNTIES OVER THE PAST 3 HOURS. ALTHOUGH THE
HEAVIEST RAINFALL HAS ENDED...RUNOFF WILL LIKELY CONTINUE TO RESULT
IN AREAS OF FLASH FLOODING.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
AURORA...JOLIET...NAPERVILLE...BOLINGBROOK...ORLAND PARK...
TINLEY PARK...ROMEOVILLE...PLAINFIELD...OSWEGO...LOCKPORT...
NEW LENOX...HOMER GLEN...MOKENA...YORKVILLE...LEMONT...CHANNAHON...
MINOOKA...INGALLS PARK...WOODRIDGE AND SHOREWOOD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4137 8825 4145 8860 4158 8860 4172 8826
4173 8803 4169 8803 4169 8796 4156 8777
$$
BIRK050
WGUS73 KLOT 130414
FFSLOT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1114 PM CDT FRI AUG 12 2016
ILC031-063-093-197-130422-
/O.CAN.KLOT.FF.W.0013.000000T0000Z-160813T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENDALL IL-GRUNDY IL-WILL IL-COOK IL-
1114 PM CDT FRI AUG 12 2016
...THE FLASH FLOOD WARNING FOR KENDALL...NORTHERN GRUNDY...
NORTHWESTERN WILL AND SOUTH CENTRAL COOK COUNTIES IS CANCELLED...
PORTIONS OF THIS WARNING HAVE BEEN CONVERTED TO AN AREAL FLOOD
WARING VALID THROUGH SATURDAY MORNING.
LAT...LON 4137 8825 4145 8860 4158 8860 4172 8826
4173 8803 4169 8803 4169 8796 4156 8777
$$
BIRKThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 8:06 PM CDT | Flash Flood Watch | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Kane and 9 more | 28 hr |
| Aug 12, 11:13 AM CDT | Special Weather Statement | LOT | Cook | 62 min |
| Aug 12, 11:17 AM CDT | Special Marine Warning | LOT | 43 min | |
| Aug 12, 11:55 AM CDT | Special Marine Warning | LOT | 35 min | |
| Aug 12, 12:14 PM CDT | River Flood Advisory | LOT | Will | 36 hr |
| Aug 12, 5:18 PM CDT | Flash Flood Warning | LOT | Grundy, LaSalle, Livingston | 6 hr |
| Aug 12, 6:43 PM CDT | Areal Flood Advisory | LOT | Cook, DuPage, Kane, Kendall | 3 hr |
Nearby
Flash Flood Warnings in Illinois, 2016Every flash flood warning in 2016
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.