Flash Flood Warning 21, NWS Chicago, IL

Issued

Sep 13, 2008, 2:12 AM CDT (07:12 UTC)

Expired

Sep 13, 2008, 4:44 AM CDT

In force

3 hr

Issued by

NWS Chicago, IL

Area

Storm-based polygon

Flood severity

None

Counties DeKalb County, IL, Kane County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL

The Chicago radar (KLOT), 76 km from the middle of the area, began a volume at 07:15 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

000 
WGUS53 KLOT 130712
FFWLOT
ILC037-089-093-099-103-131300-
/O.NEW.KLOT.FF.W.0021.080913T0712Z-080913T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
212 AM CDT SAT SEP 13 2008

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DEKALB COUNTY IN NORTH CENTRAL ILLINOIS...
  NORTHERN AND WESTERN LA SALLE COUNTY IN NORTH CENTRAL ILLINOIS...
  SOUTHEASTERN LEE COUNTY IN NORTH CENTRAL ILLINOIS...
  KANE COUNTY IN NORTHEAST ILLINOIS...
  NORTHWESTERN KENDALL COUNTY IN NORTHEAST ILLINOIS...

* UNTIL 800 AM CDT...

* AT 201 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LARGE 
AREA OF RAIN WITH EMBEDDED THUNDERSTORMS...PRODUCING RAINFALL 
AMOUNTS OF ONE TO AROUND TWO INCHES PER HOUR. RAINFALL AMOUNTS OF 
TWO TO FOUR INCHES CAN BE EXPECTED OVER MUCH OF THE WARNING AREA BY 
8 AM. RUNOFF FROM THIS HEAVY RAINFALL WILL LIKELY RESULT IN FLASH 
FLOODING OF CREEKS...STREAMS...AND LOW LYING AREAS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LITTLE
  SYCAMORE...SUGAR GROVE...SHABBONA...PAW PAW... HINCKLEY...         
  HAMPSHIRE...GENEVA...ELBURN...DE KALB...AND BATAVIA

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4185 8827 4115 8918 4118 8919 4119 8918
      4157 8918 4158 8940 4159 8943 4161 8943
      4190 8893 4214 8856

$$

IZZI

000 
WGUS73 KLOT 130816
FFSLOT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
316 AM CDT SAT SEP 13 2008

ILC037-089-093-099-103-131300-
/O.CON.KLOT.FF.W.0021.000000T0000Z-080913T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE IL-DEKALB IL-LEE IL-KENDALL IL-LA SALLE IL-
316 AM CDT SAT SEP 13 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 AM CDT FOR
NORTHERN LA SALLE...NORTHWESTERN KENDALL...SOUTHEASTERN LEE...DEKALB
AND SOUTHWESTERN KANE COUNTIES...

AT 301 AM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
THUNDERSTORMS PRODUCING HEAVY RAINFALL OVER THE WARNED AREA.

RADAR ESTIMATES INDICATE THAT AS MUCH AS 2 TO 4 INCHES OF RAIN HAVE 
FALLEN FROM LA SALLE COUNTY INTO SOUTHERN DEKALB COUNTY. ADDITIONAL 
STORMS WILL MOVE INTO THE AREA FROM THE WEST WITH RAINFALL RATES OF 
BETWEEN 1 AND 2 INCHES PER HOUR POSSIBLE.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM CDT SATURDAY MORNING
FOR NORTHEASTERN ILLINOIS AND NORTHWEST INDIANA.

LAT...LON 4185 8827 4115 8918 4118 8919 4119 8918
      4157 8918 4158 8940 4159 8943 4161 8943
      4190 8893 4214 8856

$$

000 
WGUS73 KLOT 130944
FFSLOT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
444 AM CDT SAT SEP 13 2008

ILC037-089-093-099-103-130952-
/O.CAN.KLOT.FF.W.0021.000000T0000Z-080913T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE IL-DEKALB IL-LEE IL-KENDALL IL-LA SALLE IL-
444 AM CDT SAT SEP 13 2008

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN LA
SALLE...NORTHWESTERN KENDALL...SOUTHEASTERN LEE...DEKALB AND
SOUTHWESTERN KANE COUNTIES...

THIS FLASH FLOOD WARNING HAS BEEN REPLACED WITH A NEW FLASH FLOOD 
WARNING AND EXTENDED UNTIL 1030 AM CDT.

LAT...LON 4185 8827 4115 8918 4118 8919 4119 8918
      4157 8918 4158 8940 4159 8943 4161 8943
      4190 8893 4214 8856

$$

MORRIS

Flash Flood Warnings in Illinois, 2008Every flash flood warning in 2008

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.