076  
AXUS73 KLOT 232108  
DGTLOT  
ILC007-031-037-043-089-097-111-201-302115-  
 
DROUGHT INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
408 PM CDT THU SEP 23 2021  
 
...SEVERE TO EXTREME DROUGHT CONDITIONS PRESENT ACROSS PORTIONS  
OF FAR NORTHERN ILLINOIS...  
 
SYNOPSIS...  
MOST AREAS OF NORTHERN ILLINOIS CONTINUE TO HAVE SIGNIFICANT  
RAINFALL DEFICITS FOR THE YEAR. AS AN EXAMPLE, ROCKFORD, ILLINOIS  
HAS REPORTED JUST UNDER 16 INCHES OF RAIN TO DATE FOR THE YEAR.  
THIS IS NEARLY 14 INCHES BELOW NORMAL AND RANKS AS ONE OF THE  
DRIEST YEARS IN ROCKFORD'S 115 YEAR PERIOD OF RECORD. SIMILAR  
RAINFALL DEFICITS ARE PRESENT ACROSS MUCH OF FAR NORTHERN ILLINOIS  
(GENERALLY ALONG AND NORTH OF I-88). WHILE THE AREA DID SEE SOME  
DROUGHT IMPROVEMENT FOR A PERIOD LATE THIS PAST SUMMER, THE AREA  
HAS RECENTLY SHIFTED BACK INTO A VERY DRY PATTERN, WITH LITTLE  
RAIN REPORTED OVER THE PAST FEW WEEKS. THROUGH THE FIRST 3 WEEKS  
OF SEPTEMBER, RAINFALL AMOUNTS HAVE BEEN RUNNING 25 TO 50 PERCENT  
OF NORMAL ACROSS A GOOD PORTION OF NORTHERN IL. DROUGHT CONDITIONS  
HAVE THUS BEGUN TO DETERIORATE AGAIN ACROSS MUCH OF THE AREA.  
 
EXTREME DROUGHT CONDITIONS ARE AGAIN PRESENT ACROSS NORTHERN LAKE  
COUNTY IL, WITH MODERATE TO SEVERE DROUGHT CONDITIONS IN PLACE  
ELSEWHERE ACROSS MUCH OF NORTH CENTRAL AND FAR NORTHEASTERN  
ILLINOIS.  
 
SUMMARY OF IMPACTS...  
VOLUNTEER OBSERVERS ACROSS FAR NORTHERN ILLINOIS INDICATE MUCH  
LOWER THEN TYPICAL STREAM FLOWS ON AREA CREEKS AND RIVERS,  
PARTICULARLY ALONG BEAVER CREEK AND THE KISHWAUKEE RIVER.  
REPORTS ALSO INDICATE THAT LAWNS HAVE GONE DORMANT AND THERE HAS  
BEEN SOME STRESS TO THE TREES. FEW IMPACTS TO AGRICULTURE HAVE  
BEEN RECEIVED RECENTLY, THOUGH THE DRY CONDITIONS AND STRESSED  
CROPS HAVE RESULTED IN AN EARLY START TO THE HARVEST SEASON ACROSS  
NORTHERN ILLINOIS. DATA AVAILABLE FROM THE ILLINOIS STATE WATER  
SURVEY, USGS, AND NCEP INDICATE THAT SOIL MOISTURE, GROUNDWATER,  
AND SURFACE WATER LEVELS REMAIN BELOW NORMAL.  
 
CLIMATE SUMMARY...  
OVER THE LAST 30 DAYS, RAINFALL IN MOST OF NORTHERN ILLINOIS HAS  
RANGED FROM 25% TO 50% OF AVERAGE. THESE RECENT DRY CONDITIONS  
HAVE LEAD TO DETERIORATING DROUGHT ACROSS NORTHERN IL,  
PARTICULARLY ALONG AND NORTH OF I-88 WHERE THE LARGEST ANNUAL  
RAINFALL DEFICITS, IN EXCESS OF 12 INCHES, RESIDE.  
 
PRECIPITATION/TEMPERATURE OUTLOOK...  
THE ONLY GOOD CHANCE FOR RAIN IN THE NEXT 7 DAYS IS FRIDAY NIGHT.  
WHILE A LARGE PORTION OF THE AREA SHOULD SEE SOME RAIN DURING THIS  
PERIOD, AMOUNTS WILL BE LIGHT, WITH AMOUNTS GENERALLY UNDER HALF  
AN INCH FORECAST. DRY AND UNSEASONABLY WARM CONDITIONS ARE  
FORECAST NEXT WEEK, WITH HIGHS IN THE 80S.  
 
THE CLIMATE PREDICTION CENTER'S (CPC) 30-DAY OUTLOOK SUGGESTS  
THAT THERE IS A STRONG SIGNAL FOR ABOVE NORMAL TEMPERATURES. THERE  
IS ALSO A SMALL SIGNAL FOR ABOVE AVERAGE PRECIPITATION, BUT  
CONFIDENCE IS LOW.  
 
HYDROLOGIC SUMMARY AND OUTLOOK...  
FOR MOST RIVERS IN NORTHERN ILLINOIS STREAMFLOW VALUES ARE BELOW  
AVERAGE FOR THIS TIME OF YEAR. WITHOUT ADDITIONAL RAINFALL, WATER  
LEVELS MAY FALL BELOW THE LOW WATER THRESHOLDS, ESPECIALLY ON  
SMALLER STREAMS.  
 
AT MANY LOCATIONS GROUNDWATER AND SOIL MOISTURE REMAIN BELOW  
AVERAGE. WITHOUT ADDITIONAL RAINFALL, SOIL MOISTURE AND  
GROUNDWATER LEVELS WILL REMAIN AT LOW LEVELS.  
 
NEXT ISSUANCE DATE...  
THE NEXT UPDATE IS EXPECTED BY LATE OCTOBER. ADDITIONAL DROUGHT  
STATEMENTS MAY BE ISSUED IF DROUGHT CONDITIONS WORSEN OR CHANGE  
SIGNIFICANTLY.  
 

 
 
RELATED WEB SITES...  
ADDITIONAL INFORMATION ON CURRENT DROUGHT CONDITIONS MAY BE FOUND  
AT THE FOLLOWING WEB ADDRESSES:  
 
U.S. DROUGHT MONITOR: HTTP://DROUGHTMONITOR.UNL.EDU  
NOAA DROUGHT PAGE: HTTP://WWW.DROUGHT.NOAA.GOV  
CLIMATE PREDICTION CENTER (CPC): HTTP://WWW.CPC.NCEP.NOAA.GOV  
ILLINOIS STATE CLIMATOLOGIST:  
HTTP://WWW.ISIW.ILLINOIS.EDU/ATMOS/STATECLI  
ILLINOIS DROUGHT TASK FORCE:  
HTTP://WWW.ISIW.ILLINOIS.EDU/HILITES/DROUGHT  
U.S. DROUGHT IMPACT REPORTER: HTTP://DROUGHTREPORTER.UNL.EDU  
INDIANA STATE CLIMATE OFFICE:  
HTTPS://CLIMATE.AGRY.PURDUE.EDU/CLIMATE  
 
ADDITIONAL RIVER INFORMATION...  
NWS: HTTP://WATER.WEATHER.GOV/AHPS  
USGS: HTTP://WATER.USGS.GOV  
USACE: HTTP://WWW.MVR.USACE.ARMY.MIL  
 
ACKNOWLEDGMENTS...  
THE DROUGHT MONITOR IS A MULTI-AGENCY EFFORT INVOLVING THE  
NATIONAL WEATHER SERVICE AND NATIONAL CLIMATIC DATA CENTER, THE  
USDA, STATE AND REGIONAL CENTER CLIMATOLOGISTS AND THE NATIONAL  
DROUGHT MITIGATION CENTER. INFORMATION FOR THIS STATEMENT HAS  
BEEN GATHERED FROM NWS AND FAA OBSERVATION SITES, STATE  
COOPERATIVE EXTENSION SERVICES, THE USDA, USACE, AND THE USGS.  
 
QUESTIONS OR COMMENTS...  
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS DROUGHT  
INFORMATION STATEMENT PLEASE CONTACT:  
 
NATIONAL WEATHER SERVICE  
333 W UNIVERSITY DR  
ROMEOVILLE, IL 60446  
PHONE: 815-834-0600  
E-MAIL: NWS.CHICAGO@NOAA.GOV  
 

 
 
KJB  
 
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