569  
NOUS43 KLOT 081540  
PNSLOT  
 
SERVICE CHANGE NOTICE  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
1040 AM CDT TUE OCT 8 2019  
 
TO: FAMILY OF SERVICES (FOS) SUBSCRIBERS, NOAA WEATHER WIRE  
SERVICE (NWWS) SUBSCRIBERS, EMERGENCY MANAGERS WEATHER  
INFORMATION NETWORK (EMWIN) SUBSCRIBERS, NOAAPORT  
SUBSCRIBERS, NATIONAL WEATHER SERVICE (NWS) PARTNERS  
AND OTHER USERS, AND NWS EMPLOYEES.  
 
FROM: W. SCOTT LINCOLN  
SENIOR SERVICE HYDROLOGIST  
NWS CHICAGO  
 
SUBJECT: CHANGE TO FLOOD IMPACT CATEGORIES ON THE NORTH BRANCH  
CHICAGO RIVER AT DEERFIELD, ILLINOIS  
 
EFFECTIVE OCTOBER 30, 2019, FLOOD IMPACT CATEGORIES FOR THE NORTH  
BRANCH CHICAGO RIVER AT DEERFIELD, ILLINOIS, (NWS IDENTIFIER DRFI2)  
WILL CHANGE. FLOOD IMPACT CATEGORIES ARE SET FOR THIS GAUGE BASED  
UPON THE RIVER REACH EXTENDING FROM APPROXIMATELY DEERFIELD ROAD  
DOWNSTREAM TO THE CONFLUENCE WITH SKOKIE RIVER. THESE CHANGES WERE  
COORDINATED WITH REPRESENTATIVES FROM THE LAKE COUNTY EMERGENCY  
MANAGEMENT AGENCY, THE LAKE COUNTY STORMWATER MANAGEMENT COMMISSION,  
THE VILLAGE OF DEERFIELD, THE CITY OF HIGHLAND PARK, AND THE VILLAGE  
OF NORTHBROOK.  
 
ACTION STAGE WILL CHANGE FROM 8.0 FEET TO 8.5 FEET. MINOR FLOOD  
STAGE WILL CHANGE FROM 9.0 FEET TO 9.5 FEET. MODERATE FLOOD STAGE  
WILL BE SET AT 11.5 FEET. MAJOR FLOOD STAGE WILL BE SET AT 13.5 FEET.  
 
FORECAST AND WARNING INFORMATION IS AVAILABLE FROM THE  
NOAA/NWS CHICAGO WEB PAGE AT WEATHER.GOV/CHICAGO AS WELL AS THE  
NOAA/NWS ADVANCED HYDROLOGIC PREDICTION SERVICE (AHPS) WEB PAGE  
AT WATER.WEATHER.GOV.  
 
IF YOU HAVE ANY QUESTIONS REGARDING THIS CHANGE, PLEASE CONTACT:  
 
W. SCOTT LINCOLN  
SCOTT.LINCOLN@NOAA.GOV  
815-834-0600 X493  
 
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