Heavy Rains Over the Last 7 Days in Illinois

As predicted, heavy rains have fallen across much of Illinois in the last 7 days. The first round came on Wednesday and Thursday of last week, followed by another round starting Friday night and tapering off Sunday night.

The largest total for the last 7 days, as of Monday morning, was 12.03 inches at Carbondale. Five other stations reported amounts in the 8-inch range: Kaskaskia with 8.96 inches, Steeleville with 8.66 inches, Murphysboro with 8.60 inches, Chester with 8.23 inches, and Flora with 8.15 inches. A more extensive list is at the bottom of this post.

Here is the radar/rain gage product for the last 7 days. As confirmed by the rainfall reports, the heaviest rains fell in southern Illinois. The area around Carbondale received between 10 and 15 inches. Areas in the shades of red were between 5 and 10 inches. Meanwhile, the northern half of Illinois got off a little easier with amounts of 2 to 4 inches.

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Not the greatest map in the world, but this NWS product shows several river gages in Illinois at some level of flood stage – orange means minor flooding, red means moderate flooding, and purple means major flooding. You can find the interactive version of this map here and click on the tab for “river observations”. Most locations on the Illinois and Mississippi River are showing at least minor flooding.

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While the NWS map shows the stream flows as related to flood level, this map from the USGS shows the same stream flows relative to their historical record for this time of year. All the stations in blue have exceeded the 90th percentile, meaning that the flows are higher than 90 percent of the historical record. The stations in black are at record heights for this time of year. In case you are wondering, the USGS collects and archives the historical stream flow data while the NWS uses that information and produce forecasts of future conditions since they already produce the rainfall forecasts.

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Generally, smaller rivers and streams react quickly to heavy rainfall, while it takes a while for the water to make its way into the large rivers. For example, the Illinois River at Hardin is at minor flood stage and rising. It is forecasted to peak at 33.3 feet Tuesday night.

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Here are the precipitation totals over the last 7 days, courtesy of the Midwestern Regional Climate Center. I filtered out those sites with more than 2 days of missing data.

Station Name   County  Precip  Percent Data
    CARBONDALE SEWAGE PLT  Jackson County 12.03 100
     KASKASKIA RIV NAV LO  Randolph County 8.96 88
         MURPHYSBORO 2 SW  Jackson County 8.60 88
                  CHESTER  Randolph County 8.23 88
                    FLORA  Clay County 8.15 100
        PINCKNEYVILLE 2 N  Perry County 7.60 88
         EDWARDSVILLE 2 W  Madison County 6.94 88
                   RAMSEY  Fayette County 6.87 100
       ALTON MELVIN PRICE  Madison County 6.85 75
             RED BUD 5 SE  Randolph County 6.84 88
                   NEWTON  Jasper County 6.78 88
           MT VERNON 3 NE  Jefferson County 6.66 88
                 HIGHLAND  Madison County 6.64 100
         JERSEYVILLE 2 SW  Jersey County 6.54 88
                  CARMI 2  White County 6.50 88
                    CASEY  Clark County 6.43 100
            NASHVILLE 1 E  Washington County 6.39 88
            PITTSFIELD #2  Pike County 6.38 100
                     IUKA  Marion County 6.24 88
               CHARLESTON  Coles County 6.16 88
                PLUMFIELD  Franklin County 5.98 75
                   HARDIN  Calhoun County 5.96 88
                CENTRALIA  Clinton County 5.94 88
           CLAY CITY 6SSE  Clay County 5.91 100
                   MEDORA  Macoupin County 5.89 100
                    NEOGA  Cumberland County 5.87 88
                NEOGA 4NW  Shelby County 5.69 88
                  GRAFTON  Jersey County 5.53 88
                 VIRGINIA  Cass County 5.52 100
           WHITE HALL 1 E  Greene County 5.51 75
             BEECHER CITY  Effingham County 5.32 88
             CARLYLE RSVR  Clinton County 5.24 88
             MT OLIVE 1 E  Macoupin County 5.17 88
           JACKSONVILLE 2  Morgan County 5.15 100
         BROOKPORT DAM 52  Massac County 5.14 100
     BELLEVILLE SCOTT AFB  Saint Clair County 5.13 75
                   OTTAWA  La Salle County 5.12 75
 ROMEOVILLE LEWIS UNIV AP  Will County 5.11 100
          SHELBYVILLE DAM  Shelby County 5.10 88
                     PANA  Christian County 5.08 100
                  MATTOON  Coles County 5.00 88
     MT VERNON OUTLAND AP  Jefferson County 5.00 88
                EFFINGHAM  Effingham County 4.98 100
                PARIS STP  Edgar County 4.98 100
                 VANDALIA  Fayette County 4.97 88
           PEORIA INTL AP  Peoria County 4.93 88
                   HAVANA  Mason County 4.87 88
                  SEVILLE  Fulton County 4.82 88
           QUINCY RGNL AP  Adams County 4.81 88
               GREENVILLE  Bond County 4.80 75
           ROSICLARE 5 NW  Hardin County 4.79 100
                   AURORA  Kane County 4.76 100
             EFFINGHAM SE  Effingham County 4.73 88
          MARSEILLES LOCK  La Salle County 4.63 100
                  TUSCOLA  Douglas County 4.56 100
                  AUGUSTA  Hancock County 4.55 100
     JOLIET BRANDON RD DM  Will County 4.54 100
       GRAND CHAIN DAM 53  Pulaski County 4.54 100
                  WINDSOR  Shelby County 4.48 100
                SIDELL 4N  Vermilion County 4.43 100
           SPRINGFIELD #2  Sangamon County 4.33 100
               PEORIA 5NW  Peoria County 4.32 88
                   MINONK  Woodford County 4.30 88
                  KINCAID  Christian County 4.26 100
                   CANTON  Fulton County 4.22 100
           SHELBYVILLE 5W  Shelby County 4.20 88
              MORRIS 1 NW  Grundy County 4.16 88
SPRINGFIELD ABRAHAM LINCOLN CA  Sangamon County 4.13 88
      EFFINGHAM CO MEM AP  Effingham County 4.11 88
               YATES CITY  Knox County 4.09 88
                 STREATOR  Livingston County 4.09 88
    LITTLE RED SCHOOL HSE  Cook County 4.08 100
                  BENTLEY  Hancock County 3.99 100
                   MORTON  Tazewell County 3.98 100
   LISLE-MORTON ARBORETUM  DuPage County 3.97 100
             EARLVILLE 3S  La Salle County 3.96 100
                 HENNEPIN  Putnam County 3.92 88
                  BUFFALO  Sangamon County 3.91 100
         LAKE SPRINGFIELD  Sangamon County 3.90 100
   CHICAGO MIDWAY AP 3 SW  Cook County 3.90 88
           WAYNE CITY 1 N  Wayne County 3.88 88
                    ELGIN  Kane County 3.85 100
                   RIPLEY  Brown County 3.85 88
            OAKFORD RIVER  Vermilion County 3.84 88
              MOWEAQUA 2S  Shelby County 3.83 88
               MT PULASKI  Logan County 3.81 100
                    OGDEN  Champaign County 3.81 100
              MACKINAW 1N  Tazewell County 3.76 100
              KEWANEE 1 E  Henry County 3.73 100
             MENDOTA 2 SE  La Salle County 3.70 100
          PRAIRIE CITY 2S  McDonough County 3.69 100
               ATHENS 4SW  Menard County 3.69 88
           DUPAGE AIRPORT  DuPage County 3.67 88
    CHICAGO OHARE INTL AP  Cook County 3.63 88
            QUINCY DAM 21  Adams County 3.62 100
                LOVINGTON  Moultrie County 3.57 100
            YORKVILLE 2SE  Kendall County 3.56 88
                 ROCHELLE  Ogle County 3.55 100
                    PHILO  Champaign County 3.55 88
                PRINCETON  Bureau County 3.53 100
                   ELBURN  Kane County 3.46 100
              DECATUR WTP  Macon County 3.42 88
                   EUREKA  Woodford County 3.41 88
                  ROANOKE  Woodford County 3.37 88
          MUNDELEIN 4 WSW  Lake County 3.35 100
                   MACOMB  McDonough County 3.32 88
        CHICAGO MIDWAY AP  Cook County 3.3 88
                  LINCOLN  Logan County 3.29 88
                   PEORIA  Peoria County 3.29 88
                 LA HARPE  Hancock County 3.24 100
               BEARDSTOWN  Cass County 3.22 75
                 DIXON 1W  Lee County 3.18 100
               PAW PAW 2S  Lee County 3.18 100
               NORMAL 4NE  McLean County 3.18 100
          PLAINFIELD 3 NE  Will County 3.18 88
        NEW BOSTON DAM 17  Mercer County 3.17 100
                  DE KALB  DeKalb County 3.14 100
                   ALTONA  Knox County 3.13 88
                GENOA 2SW  DeKalb County 3.07 100
                  RANTOUL  Champaign County 3.06 88
              CAIRO RIVER  Alexander County 3.06 88
               STEWARD 3S  Lee County 3.04 100
 ROCKFORD GTR ROCKFORD AP  Winnebago County 3.02 88
              ROSCOE 2 SE  Winnebago County 2.99 100
       LEONORE 3 NE RIVER  La Salle County 2.99 88
           GLEN ELLYN 4 S  DuPage County 2.98 88
              PARK FOREST  Cook County 2.96 100
                   JOLIET  Will County 2.93 88
    WILMINGTON 4 NW RIVER  Will County 2.93 88
                GALESBURG  Knox County 2.91 100
                     AVON  Fulton County 2.90 100
                  GENESEO  Henry County 2.90 88
                    CISCO  Piatt County 2.90 88
                    SALEM  Marion County 2.90 75
                MT CARMEL  Wabash County 2.88 75
         GLADSTONE DAM 18  Henderson County 2.82 88
          CONGERVILLE 2NW  Woodford County 2.80 88
           CHAMPAIGN 9 SW  Champaign County 2.76 88
                   PAXTON  Ford County 2.75 100
           SHABBONA 5 NNE  DeKalb County 2.75 88
            CAIRO RGNL AP  Alexander County 2.73 88
        LONDON MILLS 1 SW  Fulton County 2.71 88
                 OLNEY 2S  Richland County 2.69 75
                    ALEDO  Mercer County 2.67 100
                KNOXVILLE  Knox County 2.64 88
       LOCKPORT PWR HOUSE  Will County 2.61 88
       ROCK ISLAND L&D 15  Rock Island County 2.6 88
     UTICA STARVED ROCK D  La Salle County 2.6 75
        WARRENVILLE RIVER  DuPage County 2.55 88
     ST CHARLES 2NW RIVER  Kane County 2.5 88
 MOLINE QUAD CITY INTL AP  Rock Island County 2.43 88
      BLOOMINGTON WTR WKS  McLean County 2.41 88
             FREEPORT WWP  Stephenson County 2.39 100
              GENESEO 2 N  Henry County 2.28 88
           MANHATTAN 5 NE  Will County 2.26 88
                   JOSLIN  Rock Island County 2.25 88
                   DWIGHT  Livingston County 2.21 88
 CHICAGO BOTANICAL GARDEN  Cook County 2.16 88
     ILLINOIS CITY DAM 16  Rock Island County 2.14 100
          BOURBONNAIS 3NW  Kankakee County 2.11 100
          BARRINGTON 3 SW  Cook County 2.1 88
                  MARENGO  McHenry County 2.09 88
               KEITHSBURG  Mercer County 2.05 88
            FAIRBURY WWTP  Livingston County 1.94 100
                ELIZABETH  Jo Daviess County 1.91 100
                  LANSING  Cook County 1.90 88
               FULTON DAM  Whiteside County 1.83 75
               CHATSWORTH  Livingston County 1.75 100
            ROCKTON RIVER  Winnebago County 1.72 88
             CHAMPAIGN 3S  Champaign County 1.71 88
               MONEE RSVR  Will County 1.68 88
        GURNEE 3 SW RIVER  Lake County 1.67 88
            RUSSELL RIVER  Lake County 1.64 88
                   GALENA  Jo Daviess County 1.59 88
           STOCKTON 3 NNE  Jo Daviess County 1.57 88
           WOODSTOCK 5 NW  McHenry County 1.54 88
                  PONTIAC  Livingston County 1.41 88
             MOMENCE 5ENE  Kankakee County 1.23 88
                  ST ANNE  Kankakee County 1.17 88
             CLINTON 1SSW  De Witt County 1.00 75

 

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