Intense, persistent thunderstorms dumped extremely heavy rains over portions of central Illinois the evening of Friday, August 12. The hardest-hit areas were from southern Woodford County, southwest to western Sangamon County. The highest reported total was 8 inches southeast of Delavan, in far southern Tazewell County.
At Springfield, the official total was 5.59". Of that, 3.34 inches fell in a single hour, between 6 and 7 pm. To put this in perspective, the normal rainfall for the entire month of August is 3.24 inches!
The storm set the following records in Springfield:
Note that while this breaks the all-time record for a calendar day, it is not the most to fall in any 24-hour period. That record is 6.12 inches on December 2-3 of 1982.
It is possible that short-duration records (e.g. 30-minute total, 1-hour total, 2-hour total, etc.) may have been set. This will require some research.
Area Storm Reports
The map below shows the radar-estimated rainfall, adjusted for actual observations from volunteer weather observers. The orange and red shades indicate totals in the 3-6 inch range, with the white shades near Delavan indicating around 8 inches.
Location Amount Time/Date Provider ...Cass County... 3 SE Bluff Springs 1.61 in 0700 AM 08/13 COCORAHS Virginia 1.25 in 0600 AM 08/13 COOP Lagrange Lock And Dam 0.45 in 0900 AM 08/13 HADS ...Champaign County... Fisher 4.27 in 1030 AM 08/13 COOP 3 ENE Fisher 2.48 in 0800 AM 08/13 COCORAHS Champaign 3.6 W 1.45 in 0700 AM 08/13 COCORAHS 1 S Mahomet 1.44 in 0700 AM 08/13 COCORAHS Mahomet 1.40 in 1015 AM 08/13 CWOP 2 NNW Champaign 1.40 in 0700 AM 08/13 COCORAHS 3 SE Seymour 1.31 in 1000 AM 08/13 HADS 2 WNW Champaign 1.28 in 0700 AM 08/13 COCORAHS Champaign 2.5 WNW 1.27 in 0700 AM 08/13 COCORAHS 9 SW Champaign 1.26 in 1000 AM 08/13 HADS 1 WNW Lake Of The Woods 1.24 in 0700 AM 08/13 COCORAHS 3 NW Champaign 1.23 in 1014 AM 08/13 CWOP 1 NW Savoy 1.18 in 0700 AM 08/13 COCORAHS Lake Of The Woods 1.15 in 1016 AM 08/13 CWOP 1 NW Savoy 1.14 in 0700 AM 08/13 COCORAHS Rantoul Natl Aviation Ctr 1.10 in 0655 AM 08/13 AWOS Champaign 1.08 in 0700 AM 08/13 COCORAHS Champaign 1.03 in 0830 AM 08/13 COCORAHS 2 SSE Champaign 1.03 in 0600 AM 08/13 COCORAHS 4 SW Champaign 1.01 in 0915 AM 08/13 HADS 1 ESE Champaign 1.01 in 0800 AM 08/13 COCORAHS Univ Of Il-willard Ap 1.00 in 0653 AM 08/13 ASOS Savoy 0.92 in 0700 AM 08/13 COCORAHS Champaign 0.92 in 0700 AM 08/13 COCORAHS 1 N Sidney 0.92 in 0700 AM 08/13 COCORAHS Savoy 0.91 in 0700 AM 08/13 COCORAHS 2 SE Urbana 0.65 in 1011 AM 08/13 CWOP 2 ENE Philo 0.63 in 0700 AM 08/13 COCORAHS Urbana 0.63 in 0700 AM 08/13 COCORAHS Saint Joseph 0.62 in 0830 AM 08/13 COCORAHS 3 SE Urbana 0.58 in 0700 AM 08/13 COCORAHS 2 SSE Urbana 0.57 in 0800 AM 08/13 COCORAHS 4 ESE Urbana 0.56 in 0700 AM 08/13 COCORAHS 2 SSE Urbana 0.50 in 0700 AM 08/13 COCORAHS 1 E Urbana 0.46 in 1017 AM 08/13 CWOP 2 N Homer 0.41 in 0700 AM 08/13 COCORAHS 1 W Sidney 0.39 in 1018 AM 08/13 CWOP 3 WNW Armstrong 0.37 in 0740 AM 08/13 COCORAHS 2 NW Homer 0.34 in 0700 AM 08/13 COCORAHS Ogden 0.32 in 0600 AM 08/13 COOP Broadlands 0.09 in 1201 AM 08/13 COCORAHS ...Christian County... Pana 2.81 in 0700 AM 08/13 COOP 2 E Pana 2.03 in 0700 AM 08/13 COCORAHS 3 S Assumption 1.14 in 0700 AM 08/13 COCORAHS 3 W Edinburg 0.53 in 0700 AM 08/13 COCORAHS 2 SW Taylorville 0.33 in 0700 AM 08/13 COOP Taylorville Municipal Ap 0.33 in 0655 AM 08/13 AWOS Taylorville 0.26 in 0700 AM 08/13 COCORAHS ...Douglas County... 1 NE Chesterville 1.11 in 1000 AM 08/13 HADS Tuscola 0.78 in 0830 AM 08/13 COCORAHS Tuscola 0.75 in 0700 AM 08/13 COOP Tuscola 0.75 in 0700 AM 08/13 COCORAHS Hindsboro 0.08 in 1010 AM 08/13 CWOP Newman 0.03 in 1014 AM 08/13 CWOP ...Fulton County... Bryant 2.36 in 0614 AM 08/13 COCORAHS Avon 2.27 in 0700 AM 08/13 COOP Canton 1.96 in 0700 AM 08/13 COOP London Mills 1.10 in 0945 AM 08/13 USARMY-COE Seville 0.85 in 0945 AM 08/13 HADS 3 SE Fiatt 0.64 in 0700 AM 08/13 COCORAHS ...Knox County... Yates City 1.39 in 0800 AM 08/13 COOP Dahinda 0.37 in 0700 AM 08/13 COOP 1 NW Knoxville 0.19 in 0700 AM 08/13 COCORAHS Galesburg Municipal Ap 0.18 in 0655 AM 08/13 AWOS Knoxville 0.11 in 0800 AM 08/13 COOP Galesburg 0.07 in 1019 AM 08/13 CWOP ...Logan County... San Jose 6.08 in 1010 PM 08/12 PUBLIC Emden 2.9 SW 4.17 in 0800 AM 08/13 COCORAHS New Holland 2.89 in 1013 AM 08/13 CWOP Lincoln 1.06 in 0600 AM 08/13 COCORAHS Lincoln 0.98 in 0645 AM 08/13 COCORAHS Lincoln 0.97 in 0700 AM 08/13 COCORAHS Lincoln 0.96 in 0135 AM 08/13 COCORAHS Logan County Ap 0.92 in 0655 AM 08/13 AWOS 1 SE Lincoln 0.92 in 0700 AM 08/13 COCORAHS 2 ENE Lincoln 0.85 in 0700 AM 08/13 COOP 2 NW Chestnut 0.75 in 0600 AM 08/13 COCORAHS 1 SW Chestnut 0.45 in 0700 AM 08/13 COCORAHS 1 NE Chestnut 0.42 in 0730 AM 08/13 COCORAHS Mount Pulaski 0.42 in 0600 AM 08/13 COOP ...Macon County... Decatur Ap 1.55 in 0654 AM 08/13 ASOS 1 SE Latham 0.51 in 0800 AM 08/13 COCORAHS 4 SSW Maroa 0.48 in 1018 AM 08/13 CWOP Decatur 0.37 in 1200 AM 08/13 COOP ...Marshall County... Henry 1.21 in 1000 AM 08/13 EMERGENCY MGR 3 NE Lawn Ridge 1.03 in 0800 AM 08/13 COCORAHS Lacon 0.71 in 0800 AM 08/13 COOP Marshall County Ap 0.52 in 0655 AM 08/13 AWOS ...Mason County... Havana 2.27 in 0600 AM 08/13 COOP 1 SW Havana 2.00 in 0930 AM 08/13 COCORAHS Havana 1.41 in 0945 AM 08/13 HADS ...McLean County... 2 WNW Danvers 2.73 in 0700 AM 08/13 COCORAHS Danvers 2.01 in 0700 AM 08/13 COCORAHS Danvers 1.83 in 1008 AM 08/13 CWOP 2 NNE Arrowsmith 1.53 in 0715 AM 08/13 COCORAHS Arrowsmith 1.23 in 1016 AM 08/13 CWOP Bellflower 1.02 in 1016 AM 08/13 CWOP 3 NE Bloomington 0.84 in 0900 AM 08/13 COCORAHS 2 ESE Normal 0.77 in 0700 AM 08/13 COCORAHS Central Illinois Rgl Ap 0.75 in 0656 AM 08/13 AWOS 1 S Cooksville 0.75 in 1006 AM 08/13 CWOP Lexington 0.75 in 0700 AM 08/13 COCORAHS 2 NE Bellflower 0.68 in 0700 AM 08/13 COCORAHS Heyworth 0.66 in 0800 AM 08/13 COCORAHS 1 E Heyworth 0.64 in 0645 AM 08/13 COCORAHS 2 WSW Towanda 0.64 in 0530 AM 08/13 COCORAHS 4 NE Normal 0.60 in 0500 AM 08/13 COOP 4 WSW Le Roy 0.57 in 0700 AM 08/13 COCORAHS Heyworth 0.55 in 1016 AM 08/13 CWOP 3 NW Shirley 0.40 in 0700 AM 08/13 COCORAHS 4 SW Le Roy 0.35 in 0700 AM 08/13 COCORAHS ...Menard County... 1 N Athens 2.69 in 0700 AM 08/13 COCORAHS 2 NNW Athens 2.55 in 0630 AM 08/13 COCORAHS 2 NE Salisbury 1.58 in 0600 AM 08/13 COCORAHS Athens 2sw 1.58 in 0600 AM 08/13 COOP Petersburg 0.71 in 0909 AM 08/13 CWOP Sangamon River Near Oakford 0.68 in 0945 AM 08/13 COOP 2 NNE Ashland 0.30 in 1017 AM 08/13 CWOP ...Morgan County... Murrayville 1.80 in 0600 AM 08/13 COCORAHS Jacksonville 0.70 in 0700 AM 08/13 COOP Jacksonville 1.2 SW 0.69 in 0650 AM 08/13 COCORAHS Jacksonville Muni Ap 0.18 in 0655 AM 08/13 AWOS ...Moultrie County... 2 WNW Lovington 1.65 in 1000 AM 08/13 HADS Lovington 1.15 in 0700 AM 08/13 COOP 1 SSE Sullivan 1.24 in 0930 AM 08/13 TRAINED SPOTTER ...Peoria County... Peoria Intl Ap 1.98 in 0654 AM 08/13 ASOS 1 E Peoria 1.95 in 1019 AM 08/13 CWOP 4 W Peoria 1.53 in 0700 AM 08/13 COCORAHS 5 NW Peoria 1.36 in 0800 AM 08/13 COOP 4 ENE Brimfield 1.08 in 0700 AM 08/13 COCORAHS 2 NNW East Peoria 1.07 in 0945 AM 08/13 HADS 2 W Alta 1.02 in 0700 AM 08/13 COCORAHS Kingston Mines 0.71 in 0900 AM 08/13 USARMY-COE Alta 0.41 in 1018 AM 08/13 CWOP 1 NE Alta 0.33 in 1017 AM 08/13 CWOP 4 WNW Rome 0.20 in 1010 AM 08/13 CWOP ...Piatt County... 2 SE Cisco 2.31 in 0700 AM 08/13 COCORAHS 4 NE Hammond 2.13 in 0800 AM 08/13 COCORAHS 4 NNE White Heath 1.49 in 0800 AM 08/13 COCORAHS 4 NNE Monticello 1.38 in 0715 AM 08/13 COCORAHS Atwood 1.15 in 0700 AM 08/13 COCORAHS ...Sangamon County... 4 NNE Curran 5.87 in 0615 AM 08/13 COCORAHS Springfield Capital Ap 5.59 in 0652 AM 08/13 ASOS Sherman 4.25 in 0700 AM 08/13 COOP Sherman 0.1 W 4.06 in 0730 AM 08/13 COCORAHS Springfield 4.00 in 0654 AM 08/13 COOP 2 SSE Curran 3.31 in 0647 AM 08/13 CWOP 3 WNW Springfield 3.23 in 0630 AM 08/13 COCORAHS Loami 3ssw 2.89 in 0700 AM 08/13 COOP 2 W Riverton 2.84 in 0700 AM 08/13 COCORAHS 3 SSE Springfield 2.65 in 0630 AM 08/13 COCORAHS Riverton 2.46 in 0945 AM 08/13 USARMY-COE 3 ENE Chatham 2.28 in 0800 AM 08/13 COCORAHS 2 E Chatham 2.23 in 0700 AM 08/13 COCORAHS Lake Springfield 2.22 in 0748 AM 08/13 COOP 1 ESE Chatham 2.21 in 0900 AM 08/13 NWS EMPLOYEE 1 WSW Rochester 2.09 in 0645 AM 08/13 USARMY-COE Buffalo 1.06 in 0700 AM 08/13 COOP ...Schuyler County... 2 S Rushville 0.68 in 0700 AM 08/13 COCORAHS 2 WNW Browning 0.62 in 1014 AM 08/13 CWOP Beardstown 0.36 in 0945 AM 08/13 HADS ...Scott County... Florence 0.89 in 1000 AM 08/13 HADS Valley City 0.28 in 0930 AM 08/13 HADS ...Shelby County... 3 ENE Tower Hill 1.38 in 1000 AM 08/13 HADS 2 S Moweaqua 1.34 in 0600 AM 08/13 COOP 1 NNE Shelbyville 0.76 in 0600 AM 08/13 COCORAHS Shelbyville 0.76 in 0600 AM 08/13 COCORAHS Shelbyville 0.57 in 1013 AM 08/13 CWOP 1 E Shelbyville 0.55 in 1000 AM 08/13 HADS 1 SE Cowden 0.40 in 1000 AM 08/13 HADS 4 NW Mode 0.25 in 0700 AM 08/13 COCORAHS 2 WSW Sigel 0.24 in 0800 AM 08/13 COCORAHS Windsor 0.18 in 0630 AM 08/13 COOP ...Tazewell County... 4 SE Delavan 8.00 in 0700 AM 08/13 PUBLIC 1 SSE Delavan 4.49 in 0700 AM 08/13 COCORAHS 1 N Mackinaw 3.80 in 0700 AM 08/13 COOP 4 E Tremont 3.45 in 0700 AM 08/13 COCORAHS 2 NE Washington 2.89 in 0700 AM 08/13 COCORAHS 1 ENE Washington 2.29 in 1011 AM 08/13 CWOP 4 ESE Pekin 2.13 in 0700 AM 08/13 COCORAHS 2 NNE Washington 1.98 in 1011 AM 08/13 CWOP 1 NE East Peoria 1.84 in 1013 AM 08/13 CWOP 1 SSW Goodfield 1.83 in 1008 AM 08/13 CWOP 1 SSE Morton 1.71 in 0700 AM 08/13 COCORAHS Morton 1.62 in 0700 AM 08/13 COOP Delavan 1.53 in 0413 PM 08/12 CWOP 3 ENE East Peoria 1.36 in 0945 AM 08/13 HADS Peoria Lock And Dam 1.13 in 0900 AM 08/13 HADS ...Vermilion County... 1 W Hoopeston 0.71 in 0630 AM 08/13 COCORAHS Hoopeston 0.36 in 0535 PM 08/12 COOP 1 E Hoopeston 0.32 in 0630 AM 08/13 COCORAHS 4 N Sidell 0.26 in 0700 AM 08/13 COOP 4 S Armstrong 0.21 in 1011 AM 08/13 CWOP 3 SE Henning 0.21 in 0700 AM 08/13 COCORAHS 1 WSW Bismarck 0.05 in 0700 AM 08/13 COCORAHS Vermilion Rgl Ap 0.01 in 0655 AM 08/13 AWOS 2 WSW Fithian 0.01 in 1020 AM 08/13 CWOP ...Woodford County... El Paso 6.2 SW 3.80 in 0700 AM 08/13 COCORAHS 1 WSW Congerville 2.86 in 0700 AM 08/13 COCORAHS Roanoke 2.48 in 0700 AM 08/13 COOP 1 NW Germantown Hills 2.27 in 0700 AM 08/13 COCORAHS Minonk 2.21 in 0800 AM 08/13 COOP 2 NW Congerville 1.94 in 0945 AM 08/13 HADS Minonk 1.55 in 1019 AM 08/13 CWOP Germantown Hills 1.48 in 1017 AM 08/13 CWOP 1 NNE Eureka 1.41 in 1007 AM 08/13 CWOP Observations are collected from a variety of sources with varying equipment and exposures. Not all data listed are considered official.
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