839  
FGUS73 KLOT 131949  
ESFLOT  
ILC007-011-031-037-063-075-089-091-093-097-099-103-105-111-  
141-197-201-INC073-089-111-127-271700-DDHHMM-  
 
PROBABILISTIC HYDROLOGIC OUTLOOK  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
230 PM CDT THU MAR 13 2025  
   
..2025 SPRING FLOOD AND WATER OUTLOOK NUMBER 3
 
 
   
..LOCATIONS COVERED BY THIS OUTLOOK
 
 
THIS OUTLOOK IS FOR RIVERS AND STREAMS WITHIN THE NATIONAL WEATHER  
SERVICE CHICAGO HYDROLOGIC SERVICE AREA (HSA). THE CHICAGO HSA COVERS  
MOST OF NORTHEASTERN ILLINOIS AND A PORTION OF FAR NORTHWESTERN  
INDIANA. THIS INCLUDES THE ILLINOIS RIVER DOWNSTREAM TO JUST BELOW LA  
SALLE, AND NUMEROUS ILLINOIS RIVER TRIBUTARIES INCLUDING THE FOX,  
DUPAGE, DES PLAINES, CALUMET, IROQUOIS, KANKAKEE, AND VERMILION  
RIVERS. THIS ALSO INCLUDES THE ROCK RIVER FROM NEAR ROCKTON  
DOWNSTREAM TO NEAR DIXON, AND ROCK RIVER TRIBUTARIES INCLUDING THE  
PECATONICA AND KISHWAUKEE RIVERS. THIS OUTLOOK COVERS THE TIME PERIOD  
FROM EARLY MARCH THROUGH LATE MAY.  
 
   
..OUTLOOK BRIEF SUMMARY
 
 
BASED ON CURRENT CONDITIONS, THE RISK OF SPRING FLOODING IS GENERALLY  
BELOW AVERAGE ACROSS THE AREA. WEATHER PATTERNS OVER THE NEXT SEVERAL  
WEEKS MAY CHANGE THE RISK OF FLOODING IN LATER OUTLOOKS.  
 
   
..RISK FACTORS FOR SPRING FLOODING
 
 
TO DETERMINE THE RELATIVE RISK OF SPRING FLOODING, NUMEROUS FACTORS  
ARE CONSIDERED INCLUDING SNOW COVER, SOIL MOISTURE, AND CURRENT RIVER  
CONDITIONS. SNOW COVER WITH A HIGH WATER CONTENT CAN INCREASE THE  
CHANCE OF FLOODING AS MELTING CHANGES THE SNOW TO LIQUID. HIGH SOIL  
MOISTURE CONDITIONS CAN INCREASE THE CHANCE OF FLOODING BY REDUCING  
THE AMOUNT OF WATER THAT INFILTRATES INTO THE GROUND. ABOVE AVERAGE  
RIVER LEVELS CAN INCREASE THE CHANCE FOR FLOODING BECAUSE LOWER  
AMOUNTS OF WATER WOULD BE REQUIRED TO REACH FLOOD STAGE.  
 
   
..SNOW COVER AND LIQUID WATER EQUIVALENT
 
 
LITTLE-TO-NO SNOW COVER EXISTS ACROSS AREA RIVER BASINS.  
 
   
..SOIL MOISTURE AND FROST DEPTH
 
 
MODELED SOIL MOISTURE VALUES ACROSS THE AREA ARE GENERALLY BELOW  
AVERAGE. VALUES ARE HIGHEST NEAR THE ILLINOIS-WISCONSIN BORDER.  
 
NO FROZEN SOILS EXIST ACROSS THE AREA.  
 
   
..CURRENT RIVER CONDITIONS
 
 
AS OF MARCH 13, RIVER LEVELS ACROSS THE AREA RANGE FROM MUCH BELOW  
AVERAGE TO NEAR AVERAGE. THE MOST ANOMALOUSLY LOW STREAMFLOW VALUES  
ARE LOCATED IN PORTIONS OF THE KANKAKEE, IROQUOIS, AND VERMILION  
RIVER BASINS EXTENDING FROM CENTRAL ILLINOIS TO NORTHERN INDIANA.  
 
RIVER ICE SPOTTERS, RIVER GAUGES, AND SATELLITE IMAGERY INDICATE THAT  
NO AREAS OF RIVER ICE REMAIN ACROSS THE AREA.  
 
   
..FALL 2024 WEATHER SUMMARY
 
 
TEMPERATURES WERE GENERALLY ABOVE AVERAGE ACROSS NORTHEASTERN  
ILLINOIS AND NORTHWESTERN INDIANA DURING FALL 2024. TEMPERATURES WERE  
3-6F ABOVE AVERAGE ACCORDING TO THE MIDWESTERN REGIONAL CLIMATE  
CENTER.  
 
PRECIPITATION WAS GENERALLY BELOW AVERAGE ACROSS NORTHEASTERN  
ILLINOIS AND NORTHWESTERN INDIANA DURING FALL 2024. PRECIPITATION WAS  
1-6 INCHES BELOW AVERAGE ACCORDING TO THE MIDWESTERN REGIONAL CLIMATE  
CENTER.  
 
   
..WINTER 2024-2025 WEATHER SUMMARY
 
 
TEMPERATURES FOR WINTER 2024-2025 HAVE AVERAGED ABOUT 0-2F BELOW  
AVERAGE IN NORTHEASTERN ILLINOIS AND NORTHWESTERN INDIANA. ALTHOUGH  
TEMPERATURES WERE GENERALLY NEAR AVERAGE, MULTIPLE PERIODS OF VERY  
COLD TEMPERATURES CONTRIBUTED TO DEEPLY FROZEN SOILS ACROSS THE AREA  
BY EARLY FEBRUARY.  
 
PRECIPITATION FOR WINTER 2024-2025 RANGED FROM 2-4 INCHES BELOW  
AVERAGE IN NORTHEASTERN ILLINOIS AND NORTHWESTERN INDIANA.  
 
THE FIRST MEASURABLE SNOWFALL (>0.1 INCHES) IN NORTHEASTERN ILLINOIS  
AND NORTHWESTERN INDIANA OCCURRED MID-TO-LATE NOVEMBER IN MOST AREAS.  
 
THE SEASON-TO-DATE SNOWFALL RANGED FROM ABOUT 6 INCHES TO ABOUT 18  
INCHES ACROSS AREA RIVER BASINS, WITH THE HIGHEST SNOW TOTALS IN  
NORTHERN INDIANA AND SOUTHERN WISCONSIN. OBSERVED SNOWFALL WAS  
GENERALLY BELOW AVERAGE IN MOST AREAS, WITH VALUES CLOSEST TO AVERAGE  
NEAR CENTRAL ILLINOIS AND THE MOST BELOW AVERAGE IN NORTHERN ILLINOIS  
AND SOUTHERN WISCONSIN.  
 
   
..SPRING WEATHER OUTLOOK
 
 
THE LONG TERM (NEXT FEW WEEKS) OUTLOOK FROM THE CLIMATE PREDICTION  
CENTER INDICATES ABOVE AVERAGE TEMPERATURES AND ABOVE AVERAGE  
PRECIPITATION ARE SLIGHTLY FAVORED.  
 
ALTHOUGH SNOW COVER, SOIL MOISTURE, AND RECENT RIVER LEVELS CAN  
PROVIDE SOME INDICATION OF THE RELATIVE RISK OF SPRING FLOODING, ANY  
WEATHER SYSTEM THAT PRODUCES HEAVY RAINFALL COULD CAUSE FLOODING.  
SPRING FLOOD OUTLOOKS ARE NOT ABLE TO ASSESS THE RISK OF FLOODING DUE  
TO HEAVY RAINFALL MORE THAN A WEEK OR SO IN ADVANCE.  
 
   
..DETAILED FLOOD OUTLOOK
 
 
IN TABLE 1 BELOW...THE CURRENT (CS) AND HISTORICAL (HS) OR NORMAL  
PROBABILITIES OF EXCEEDING MINOR...MODERATE...AND MAJOR FLOOD STAGES  
ARE LISTED FOR THE VALID TIME PERIOD.  
 
CS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY  
BASED ON CURRENT CONDITIONS.  
 
HS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY  
BASED ON HISTORICAL OR NORMAL CONDITIONS.  
 
WHEN THE VALUE OF CS IS MORE THAN HS...THE PROBABILITY OF  
EXCEEDING THAT LEVEL IS HIGHER THAN NORMAL. WHEN THE VALUE OF CS IS  
LESS THAN HS...THE PROBABILITY OF EXCEEDING THAT LEVEL IS LOWER  
THAN NORMAL.IN TABLE 1 BELOW...THE CURRENT (CS) AND HISTORICAL (HS)  
OR NORMAL PROBABILITIES OF EXCEEDING MINOR...MODERATE...AND MAJOR  
FLOOD STAGES ARE LISTED FOR THE VALID TIME PERIOD.  
 
CS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY  
BASED ON CURRENT CONDITIONS.  
 
HS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY  
BASED ON HISTORICAL OR NORMAL CONDITIONS.  
 
WHEN THE VALUE OF CS IS MORE THAN HS...THE PROBABILITY OF  
EXCEEDING THAT LEVEL IS HIGHER THAN NORMAL. WHEN THE VALUE OF CS IS  
LESS THAN HS...THE PROBABILITY OF EXCEEDING THAT LEVEL IS LOWER  
THAN NORMAL.  
 
   
..TABLE 1--PROBABILITIES FOR MINOR...MODERATE AND MAJOR FLOODING
 
 
VALID PERIOD: 03/03/2025 - 06/01/2025  
 
: CURRENT AND HISTORICAL  
: CHANCES OF EXCEEDING  
: FLOOD CATEGORIES  
: AS A PERCENTAGE (%)  
CATEGORICAL :  
FLOOD STAGES (FT) : MINOR MODERATE MAJOR  
LOCATION MINOR MOD MAJOR : CS HS CS HS CS HS  
-------- ----- ----- ----- : --- --- --- --- --- ---  
:PECATONICA RIVER  
SHIRLAND 12.0 14.0 15.5 : 12 36 <5 14 <5 <5  
:ROCK RIVER  
ROCKTON 10.0 11.0 14.0 : 11 34 7 22 <5 8  
LATHAM PARK 9.0 11.0 13.5 : 11 35 <5 14 <5 7  
ROCKFORD (AUBURN 6.0 8.5 10.0 : <5 10 <5 <5 <5 <5  
:KISHWAUKEE RIVER  
BELVIDERE 9.0 10.0 12.0 : <5 12 <5 7 <5 <5  
:SB KISHWAUKEE RIVER  
DEKALB 10.0 11.0 12.5 : <5 10 <5 <5 <5 <5  
:KISHWAUKEE RIVER  
PERRYVILLE 12.0 18.0 22.0 : 5 24 <5 <5 <5 <5  
:ROCK RIVER  
BYRON 13.0 14.0 16.0 : <5 15 <5 13 <5 9  
DIXON 16.0 18.0 20.0 : <5 14 <5 7 <5 <5  
:NORTH BRANCH CHICAGO RIVER  
CHICAGO (PULASKI 18.0 20.0 21.0 : <5 <5 <5 <5 <5 <5  
:DES PLAINES RIVER  
RUSSELL 7.0 9.0 10.0 : 19 27 5 8 <5 6  
GURNEE 7.0 9.0 11.0 : 26 39 5 9 <5 <5  
LINCOLNSHIRE 12.5 14.0 15.5 : 15 21 6 11 <5 6  
DES PLAINES 15.0 18.0 19.0 : 22 28 <5 7 <5 <5  
RIVER FOREST 16.0 17.5 18.5 : <5 <5 <5 <5 <5 <5  
RIVERSIDE 7.5 8.0 9.0 : 15 18 6 9 <5 <5  
LEMONT 10.0 13.0 15.0 : 42 45 <5 <5 <5 <5  
:WB DU PAGE RIVER  
WARRENVILLE 12.5 14.5 17.5 : <5 <5 <5 <5 <5 <5  
:EAST BRANCH DU PAGE RIVER  
BOLINGBROOK 20.0 22.0 24.0 : <5 <5 <5 <5 <5 <5  
:DU PAGE RIVER  
PLAINFIELD 12.0 14.0 15.0 : <5 <5 <5 <5 <5 <5  
SHOREWOOD 15.5 17.5 19.5 : 28 31 7 10 <5 <5  
:FOX RIVER  
ALGONQUIN LOCK & 9.5 10.5 12.0 : 20 48 7 24 <5 12  
MONTGOMERY 13.5 15.0 16.0 : <5 14 <5 <5 <5 <5  
DAYTON 12.0 14.0 24.0 : 25 45 13 15 <5 <5  
:KANKAKEE RIVER  
DUNNS BRIDGE 10.0 12.0 13.0 : 13 23 <5 <5 <5 <5  
SHELBY 10.5 11.5 12.5 : 16 32 <5 10 <5 5  
MOMENCE 5.0 6.5 9.0 : 18 25 9 9 <5 <5  
:IROQUOIS RIVER  
RENSSELAER 12.0 14.0 15.0 : 23 26 5 6 5 5  
FORESMAN 18.0 22.0 24.0 : 26 31 <5 <5 <5 <5  
IROQUOIS 18.0 24.0 25.0 : 45 63 <5 <5 <5 <5  
:SUGAR CREEK  
MILFORD 18.0 22.0 26.0 : 51 54 14 15 <5 <5  
:IROQUOIS RIVER  
CHEBANSE 16.0 18.0 20.0 : 9 12 <5 <5 <5 <5  
:KANKAKEE RIVER  
WILMINGTON 6.5 8.0 10.0 : 12 14 5 6 <5 <5  
:MAZON RIVER  
COAL CITY 12.0 16.0 19.0 : 5 20 <5 <5 <5 <5  
:VERMILION RIVER  
PONTIAC 14.0 15.0 18.0 : 8 12 7 10 <5 6  
LEONORE 16.0 21.0 26.0 : 23 33 6 14 <5 <5  
:HART DITCH  
DYER 12.0 13.0 14.0 : <5 <5 <5 <5 <5 <5  
:THORN CREEK  
THORNTON 9.0 14.0 15.5 : 19 22 <5 <5 <5 <5  
:LITTLE CALUMET RIVER  
MUNSTER (HOHMAN A 12.0 14.0 17.0 : 49 52 18 21 9 10  
SOUTH HOLLAND 16.0 17.5 19.5 : <5 <5 <5 <5 <5 <5  
:ILLINOIS RIVER  
MORRIS 16.0 18.0 22.0 : 22 35 15 22 7 8  
OTTAWA 463.0 467.0 471.0 : 26 38 8 13 <5 <5  
LA SALLE 20.0 27.0 31.0 : 65 74 11 16 <5 5  
 
LEGEND  
CS = CONDITIONAL SIMULATION (CURRENT OUTLOOK)  
HS = HISTORICAL SIMULATION  
FT = FEET  
 
IN TABLE 2 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE  
PROBABILITY OF EXCEEDING THE LISTED STAGE LEVELS (FT) FOR THE VALID  
TIME PERIOD.  
   
..TABLE 2--EXCEEDANCE PROBABILITIES
 
 
CHANCE OF EXCEEDING STAGES  
AT SPECIFIC LOCATIONS  
VALID PERIOD: 03/03/2025 - 06/01/2025  
LOCATION 95% 90% 75% 50% 25% 10% 5%  
-------- ------ ------ ------ ------ ------ ------ ------  
:PECATONICA RIVER  
SHIRLAND 5.8 6.6 7.0 9.0 10.9 12.2 12.8  
:ROCK RIVER  
ROCKTON 4.7 5.3 6.0 7.4 8.6 10.3 11.6  
LATHAM PARK 4.9 5.1 5.5 6.5 7.7 9.5 10.8  
ROCKFORD (AUBURN 2.8 2.9 3.0 3.1 3.3 4.0 4.8  
:KISHWAUKEE RIVER  
BELVIDERE 1.8 2.0 2.8 4.2 5.3 6.9 7.8  
:SB KISHWAUKEE RIVER  
DEKALB 3.5 4.0 4.9 6.4 7.3 8.7 9.4  
:KISHWAUKEE RIVER  
PERRYVILLE 6.3 7.0 7.9 9.1 10.3 11.5 12.4  
:ROCK RIVER  
BYRON 6.4 6.9 7.5 8.9 10.1 11.6 12.8  
DIXON 9.0 9.4 9.9 11.2 12.1 13.9 15.3  
:NORTH BRANCH CHICAGO RIVER  
CHICAGO (PULASKI 12.7 12.9 13.8 14.9 15.6 16.6 17.4  
:DES PLAINES RIVER  
RUSSELL 4.0 4.4 5.2 6.1 6.8 7.6 9.1  
GURNEE 3.4 3.7 5.0 6.1 7.1 8.1 9.2  
LINCOLNSHIRE 7.7 7.9 9.0 10.0 11.3 12.8 14.7  
DES PLAINES 9.6 10.0 11.5 13.1 14.6 16.7 17.8  
RIVER FOREST 6.5 6.8 9.5 11.1 12.8 14.2 15.1  
RIVERSIDE 3.5 3.8 4.8 6.0 7.0 7.7 8.1  
LEMONT 7.1 7.4 8.6 9.7 10.5 11.4 11.7  
:WB DU PAGE RIVER  
WARRENVILLE 8.9 9.1 9.6 10.7 11.1 11.6 11.8  
:EAST BRANCH DU PAGE RIVER  
BOLINGBROOK 16.6 16.8 17.6 18.1 18.7 19.2 19.6  
:DU PAGE RIVER  
PLAINFIELD 8.2 8.2 8.9 9.8 10.4 11.0 11.6  
SHOREWOOD 11.7 12.1 12.7 13.8 15.2 16.6 17.1  
:FOX RIVER  
ALGONQUIN LOCK & 6.1 6.4 7.3 8.3 9.3 10.2 11.8  
MONTGOMERY 11.6 11.8 12.2 12.6 13.0 13.2 13.4  
DAYTON 7.4 7.7 9.0 10.9 12.0 14.4 15.0  
:KANKAKEE RIVER  
DUNNS BRIDGE 6.3 6.5 7.5 8.3 9.3 10.1 10.3  
SHELBY 7.5 7.7 8.5 9.4 10.1 10.6 11.1  
MOMENCE 3.0 3.1 3.5 4.1 4.6 6.1 7.6  
:IROQUOIS RIVER  
RENSSELAER 7.0 7.9 9.3 10.6 11.9 13.0 15.0  
FORESMAN 12.0 13.3 14.9 16.4 18.1 19.4 21.3  
IROQUOIS 11.2 12.2 15.0 17.3 20.6 22.0 22.7  
:SUGAR CREEK  
MILFORD 11.8 13.5 16.5 18.2 20.2 22.7 24.8  
:IROQUOIS RIVER  
CHEBANSE 7.5 8.9 9.7 11.6 14.4 16.0 17.1  
:KANKAKEE RIVER  
WILMINGTON 2.8 3.1 3.8 4.8 5.6 6.6 8.3  
:MAZON RIVER  
COAL CITY 2.6 3.0 5.0 7.1 9.3 11.2 12.1  
:VERMILION RIVER  
PONTIAC 4.6 5.2 6.2 8.2 10.9 12.9 15.8  
LEONORE 5.9 7.2 9.1 11.7 15.4 19.3 21.3  
:HART DITCH  
DYER 4.0 4.2 4.9 5.8 6.8 8.5 11.6  
:THORN CREEK  
THORNTON 4.5 5.0 6.0 6.9 8.6 10.1 12.3  
:LITTLE CALUMET RIVER  
MUNSTER (HOHMAN A 9.9 10.5 11.1 11.9 13.4 16.3 19.6  
SOUTH HOLLAND 8.9 9.6 10.7 11.8 13.8 14.7 15.6  
:ILLINOIS RIVER  
MORRIS 6.9 7.9 9.8 13.2 15.4 20.7 22.9  
OTTAWA 459.0 459.2 459.7 461.8 463.1 466.4 469.0  
LA SALLE 13.5 15.2 18.7 22.2 24.4 27.4 29.6  
 
IN TABLE 3 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE  
PROBABILITY OF FALLING BELOW THE LISTED STAGE LEVELS (FT) FOR THE  
VALID TIME PERIOD.  
   
..TABLE 3--NONEXCEEDANCE PROBABILITIES
 
 
CHANCE OF FALLING BELOW STAGES  
AT SPECIFIC LOCATIONS  
VALID PERIOD: 03/03/2025 - 06/01/2025  
LOCATION 95% 90% 75% 50% 25% 10% 5%  
-------- ------ ------ ------ ------ ------ ------ ------  
:PECATONICA RIVER  
SHIRLAND 1.6 1.6 1.5 1.2 1.0 1.0 0.9  
:ROCK RIVER  
ROCKTON 3.3 3.3 3.2 2.7 2.2 1.8 1.7  
LATHAM PARK 3.3 3.3 3.3 2.7 2.3 1.9 1.7  
ROCKFORD (AUBURN 3.3 3.3 3.3 2.7 2.3 1.9 1.7  
:KISHWAUKEE RIVER  
BELVIDERE 0.1 0.1 0.1 0.1 0.0 0.0 0.0  
:SB KISHWAUKEE RIVER  
DEKALB 0.0 0.0 0.0 0.0 0.0 0.0 0.0  
:KISHWAUKEE RIVER  
PERRYVILLE 0.3 0.2 0.2 0.2 0.1 0.1 0.1  
:ROCK RIVER  
BYRON 3.7 3.7 3.7 3.2 2.6 2.2 2.0  
DIXON 4.1 4.0 4.0 3.5 2.9 2.4 2.1  
:NORTH BRANCH CHICAGO RIVER  
CHICAGO (PULASKI 0.1 0.1 0.0 0.0 0.0 0.0 0.0  
:DES PLAINES RIVER  
RUSSELL 0.0 0.0 0.0 0.0 0.0 0.0 0.0  
GURNEE 0.1 0.1 0.1 0.1 0.1 0.0 0.0  
LINCOLNSHIRE 0.1 0.1 0.1 0.1 0.1 0.0 0.0  
DES PLAINES 0.2 0.2 0.2 0.1 0.1 0.1 0.1  
RIVER FOREST 0.3 0.3 0.2 0.2 0.1 0.1 0.1  
RIVERSIDE 0.4 0.4 0.3 0.3 0.2 0.1 0.1  
LEMONT 0.4 0.4 0.3 0.3 0.2 0.2 0.1  
:WB DU PAGE RIVER  
WARRENVILLE 0.1 0.1 0.0 0.0 0.0 0.0 0.0  
:EAST BRANCH DU PAGE RIVER  
BOLINGBROOK 0.1 0.1 0.0 0.0 0.0 0.0 0.0  
:DU PAGE RIVER  
PLAINFIELD 0.2 0.2 0.1 0.1 0.1 0.1 0.1  
SHOREWOOD 0.2 0.2 0.2 0.2 0.1 0.1 0.1  
:FOX RIVER  
ALGONQUIN LOCK & 0.6 0.6 0.5 0.4 0.3 0.3 0.2  
MONTGOMERY 0.8 0.8 0.6 0.5 0.4 0.3 0.3  
DAYTON 1.4 1.3 1.0 0.9 0.8 0.5 0.4  
:KANKAKEE RIVER  
DUNNS BRIDGE 1.1 1.0 1.0 0.9 0.8 0.7 0.6  
SHELBY 1.4 1.4 1.3 1.1 1.0 0.9 0.8  
MOMENCE 1.7 1.6 1.5 1.3 1.2 1.0 0.9  
:IROQUOIS RIVER  
RENSSELAER 0.1 0.1 0.1 0.1 0.0 0.0 0.0  
FORESMAN 0.2 0.2 0.1 0.1 0.1 0.1 0.0  
IROQUOIS 0.3 0.2 0.2 0.1 0.1 0.1 0.0  
:SUGAR CREEK  
MILFORD 0.1 0.1 0.1 0.1 0.0 0.0 0.0  
:IROQUOIS RIVER  
CHEBANSE 0.7 0.6 0.5 0.4 0.3 0.2 0.1  
:KANKAKEE RIVER  
WILMINGTON 2.6 2.6 2.3 1.9 1.7 1.4 1.1  
:MAZON RIVER  
COAL CITY 0.0 0.0 0.0 0.0 0.0 0.0 0.0  
:VERMILION RIVER  
PONTIAC 0.0 0.0 0.0 0.0 0.0 0.0 0.0  
LEONORE 0.1 0.1 0.1 0.0 0.0 0.0 0.0  
:HART DITCH  
DYER 0.0 0.0 0.0 0.0 0.0 0.0 0.0  
:THORN CREEK  
THORNTON 0.0 0.0 0.0 0.0 0.0 0.0 0.0  
:LITTLE CALUMET RIVER  
MUNSTER (HOHMAN A 0.0 0.0 0.0 0.0 0.0 0.0 0.0  
SOUTH HOLLAND 0.1 0.1 0.1 0.0 0.0 0.0 0.0  
:ILLINOIS RIVER  
MORRIS 4.0 3.9 3.4 2.9 2.4 1.8 1.6  
LA SALLE 6.0 5.7 5.2 4.2 3.4 2.5 2.1  
 
THESE LONG-RANGE PROBABILISTIC OUTLOOKS CONTAIN FORECAST VALUES THAT  
ARE CALCULATED USING MULTIPLE SEASON SCENARIOS FROM 30 OR MORE YEARS  
OF CLIMATOLOGICAL DATA...INCLUDING CURRENT CONDITIONS OF THE  
RIVER...SOIL MOISTURE...SNOW COVER...AND 30 TO 90 DAY LONG-RANGE  
OUTLOOKS OF TEMPERATURE AND PRECIPITATION. BY PROVIDING A RANGE OF  
PROBABILITIES...THE LEVEL OF RISK ASSOCIATED WITH LONG-RANGE PLANNING  
DECISIONS CAN BE DETERMINED. THESE PROBABILISTIC FORECASTS ARE PART  
OF THE NATIONAL WEATHER SERVICE'S ADVANCED HYDROLOGIC PREDICTION  
SERVICE.  
 
VISIT OUR WEB SITE WEATHER.GOV/LOT FOR MORE WEATHER AND WATER  
INFORMATION.  
 
THE NEXT OUTLOOK WILL BE ISSUED  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab IL Page
The Nexlab IN Page Main Text Page