652  
WGUS83 KLOT 130253  
FLSLOT  
 
FLOOD STATEMENT  
NATIONAL WEATHER SERVICE CHICAGO IL  
953 PM CDT WED AUG 12 2026  
 
...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN  
ILLINOIS...  
 
THORN CREEK AT THORNTON AFFECTING COOK COUNTY.  
 
FOR THE THORN CREEK...INCLUDING THORNTON...MINOR FLOODING IS  
FORECAST.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A FLOOD WARNING MEANS WATER LEVELS ABOVE FLOOD STAGE ARE IMMINENT OR  
MAY ALREADY BE OCCURRING. PERSONS ALONG RIVERS AND STREAMS IN THE  
WARNED AREA SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND  
PROPERTY.  
 
THESE FORECASTS ARE BASED ON OBSERVED PRECIPITATION AS WELL AS  
FORECAST PRECIPITATION 24 HOURS INTO THE FUTURE. CHANGES TO THE  
RAINFALL FORECAST, OR ANY ADDITIONAL RAINFALL AFTER 24 HOURS, MAY  
CAUSE CHANGES TO THESE RIVER FORECASTS.  
 
ADDITIONAL INFORMATION IS AVAILABLE AT WWW.WEATHER.GOV.  
 
THE NEXT STATEMENT WILL BE ISSUED BY THURSDAY AFTERNOON.  
 

 
 
ILC031-132000-  
/O.EXT.KLOT.FL.W.0068.000000T0000Z-260813T2000Z/  
/THNI2.1.ER.260811T2331Z.260812T0830Z.260813T1400Z.NO/  
953 PM CDT WED AUG 12 2026  
   
..FLOOD WARNING NOW IN EFFECT UNTIL THURSDAY AFTERNOON
 
 
* WHAT...MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.  
 
* WHERE...THORN CREEK FROM NEAR GLENWOOD DOWNSTREAM TO CONFLUENCE  
WITH LITTLE CALUMET RIVER, INCLUDING THE THORNTON GAUGE.  
 
* WHEN...UNTIL THURSDAY AFTERNOON.  
 
* IMPACTS...AT 9.0 FEET, WATER BEGINS TO BE DIVERTED THROUGH THORN  
CREEK DIVERSION TUNNEL.  
 
* ADDITIONAL DETAILS...  
- AT 9:30 PM CDT WEDNESDAY THE STAGE WAS 9.4 FEET.  
- RECENT ACTIVITY...THE MAXIMUM RIVER STAGE IN THE 24 HOURS ENDING  
AT 9:30 PM CDT WEDNESDAY WAS 10.6 FEET.  
- FORECAST...THE RIVER HAS CRESTED AND IS EXPECTED TO GRADUALLY  
FALL OVERNIGHT. IT WILL FALL BELOW FLOOD STAGE LATE TOMORROW  
MORNING.  
- FLOOD STAGE IS 9.0 FEET.  
- HTTP://WWW.WEATHER.GOV/SAFETY/FLOOD  
 

 
 
LAT...LON 4161 8760 4158 8754 4151 8760 4154 8767  
 

 
 
YACK  
 
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