Alert archive / Illinois / Flash Flood Warnings in 2016

Flash Flood Warning 21, NWS Chicago, IL

August 28, 2016Livingston County, Illinois

NWS Chicago, IL issued this flash flood warning at Aug 28, 2016, 3:13 PM CDT for Livingston County, Illinois. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 28, 2016, 3:13 PM CDT (20:13 UTC)
Expired: Aug 28, 2016, 11:15 PM CDT
In force: 8 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: None

County Livingston County, IL

The radar

The Chicago radar (KLOT), 97 km from the middle of the area, began a volume at 20:12 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.2 hours before the alert went out and 77 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1158 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

453 
WGUS53 KLOT 282013
FFWLOT
ILC105-290415-
/O.NEW.KLOT.FF.W.0021.160828T2013Z-160829T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
313 PM CDT SUN AUG 28 2016

THE NATIONAL WEATHER SERVICE IN CHICAGO  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN LIVINGSTON COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1115 PM CDT SUNDAY

* AT 311 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS MUCH OF WESTERN LIVINGSTON COUNTY. BETWEEN AN
  INCH AND AN INCH ANDA HALF OF RAIN HAS ALREADY FALLEN. RAINFALL
  RATES OF BETWEEN TWO AND FOUR INCHES OF RAIN PER HOUR ARE POSSIBLE
  WITH THE HEAVIEST STORMS...AND WILL LIKELY PRODUCE FLASH FLOODING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PONTIAC...GRIDLEY...FLANAGAN AND CORNELL. 

INCLUDING THE FOLLOWING INTERSTATE...
 I-55 BETWEEN MILE MARKERS 188 AND 207.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4076 8858 4075 8893 4097 8893 4109 8865
      4091 8848 4087 8855 4075 8855 4075 8858

$$

RATZER

3 follow-up statements

401 
WGUS73 KLOT 282216
FFSLOT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
516 PM CDT SUN AUG 28 2016

ILC105-290415-
/O.CON.KLOT.FF.W.0021.000000T0000Z-160829T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON IL-
516 PM CDT SUN AUG 28 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT SUNDAY
FOR NORTHWESTERN LIVINGSTON COUNTY...

AT 511 PM CDT...DOPPLER RADAR RAINFALL ESTIMATES INDICATED THAT
WIDESPREAD AMOUNTS OF AN INCH AND A HALF HAD FALLEN ACROSS THE
WARNED AREA SINCE EARLIER THIS AFTERNOON. HIGHER AMOUNTS...LOCALLY
IN EXCESS OF THREE INCHES...HAD OCCURRED ACROSS NORTHWEST LIVINGSTON
COUNTY FROM NEAR DANA...TO CORNELL AND ODELL. SEVERAL PUBLIC REPORTS
OF FLOODED YARDS AND LOW LYING AREAS HAVE BEEN RECEIVED. LIGHT TO
MODERATE RAIN CONTINUES ACROSS THE WARNED AREA...WITH ADDITIONAL
AMOUNTS OF A QUARTER TO A HALF INCH POSSIBLE THROUGH 6 PM CDT.

SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE...
PONTIAC...GRIDLEY...FLANAGAN AND CORNELL. 

INCLUDING THE FOLLOWING INTERSTATE...
 I-55 BETWEEN MILE MARKERS 188 AND 207.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4076 8858 4075 8893 4097 8893 4109 8865
      4091 8848 4087 8855 4075 8855 4075 8858

$$

RATZER

886 
WGUS73 KLOT 282346
FFSLOT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
646 PM CDT SUN AUG 28 2016

ILC105-290415-
/O.CON.KLOT.FF.W.0021.000000T0000Z-160829T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON IL-
646 PM CDT SUN AUG 28 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR
NORTHWESTERN LIVINGSTON COUNTY...

AT 641 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE LIGHT TO
MODERATE RAIN FALLING ACROSS A PORTION OF THE WARNED AREA...
GENERALLY SOUTH AND EAST OF PONTIAC. RADAR RAINFALL ESTIMATES
INDICATE THAT WIDESPREAD AMOUNTS OF ONE TO TWO INCHES OF RAIN HAD
FALLEN ACROSS THE WARNED AREA FROM EARLIER STRONG THUNDERSTORMS...
WITH LOCALLY HIGHER AMOUNTS OF THREE TO IN EXCESS OF FOUR INCHES
INDICATED ROUGHLY ALONG AND JUST SOUTH OF A DANA TO CORNELL AND
ODELL LINE. ONGOING LIGHT RAIN SHOULD CONTINUE TO DISSIPATE EARLY
THIS EVENING...THOUGH STANDING WATER WILL BE SLOW TO RECEDE
TONIGHT.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
PONTIAC...FLANAGAN AND CORNELL. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4076 8858 4075 8893 4097 8893 4109 8865
      4091 8848 4087 8855 4075 8855 4075 8858

$$

RATZER

820 
WGUS73 KLOT 290032
FFSLOT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
732 PM CDT SUN AUG 28 2016

ILC105-290041-
/O.CAN.KLOT.FF.W.0021.000000T0000Z-160829T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON IL-
732 PM CDT SUN AUG 28 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN LIVINGSTON COUNTY IS
CANCELLED...

THE HEAVY RAIN HAS ENDED. THE THREAT OF IMMEDIATE RISING WATER HAS
ENDED...AND THE FLASH FLOOD WARNING HAS BEEN REPLACED WITH AN AERIAL
FLOOD WARNING WHICH IS IN EFFECT UNTIL 115 PM CDT MONDAY.

LAT...LON 4076 8858 4075 8893 4097 8893 4109 8865
      4091 8848 4087 8855 4075 8855 4075 8858

$$

RATZER

The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 28, 10:28 AM CDT	River Flood Advisory	LOT	LaSalle	3 days
Aug 28, 12:49 PM CDT	Areal Flood Advisory	LOT	Ford, Grundy, Iroquois, Kankakee, LaSalle, Livingston and 1 more	4 hr
Aug 28, 1:30 PM CDT	Special Weather Statement	LOT	Grundy	45 min
Aug 28, 1:34 PM CDT	Flash Flood Warning	LOT	Ford, Grundy, Kankakee, LaSalle, Livingston, Will	6 hr
Aug 28, 1:45 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, Kankakee, Livingston, Will	45 min
Aug 28, 4:04 PM CDT	Areal Flood Advisory	LOT	Lee	3 hr
Aug 28, 4:13 PM CDT	River Flood Advisory	LOT	Grundy	42 hr
Aug 28, 5:48 PM CDT	Areal Flood Advisory	LOT	Lee	3 hr

Nearby

Flash Flood Warnings in Illinois, 2016 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.