1 flood, 1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before the first event at Jul 11, 6:00 PM CST, 4 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 700 PM CDT TUE JUL 11 2006 .DISCUSSION... 245 PM CDT WARM FRONT EXTENDING FROM NEAR SAVANNA TO VALPARAISO WILL CONTINUE LIFTING SLOWLY NORTH THROUGH THIS LATE AFTN AND EVE AS SFC LOW MOVES SE FROM CENT IA. GPS PRECIPITABLE WATER RETRIEVALS INDICATE VALUES NOW IN EXCESS OF 2 INCHES AT CHICAGO/ROCK ISLAND/URBANA AS SFC DEWPOINTS REMAIN IN THE LOWER 70S. RADAR ECHOES HAVE BEEN INCREASING A BIT IN COVERAGE OVER THE LAST FEW HRS IN RESPONSE TO LIMITED INSOLATION THROUGH MOSTLY CLOUDY SKIES. SOLID RAIN CHANCES CONTINUE UNTIL LATE TONIGHT AS BOUNDARY REMAINS DRAPED ACROSS THE LOCAL AREA SLICING THROUGH THIS RATHER TROPICAL AIRMASS. MID/UPR TROUGH...RIGHT ENTRANCE REGION OF H2 JET STREAK...AND SFC BOUNDARY SHIFT INTO CENT IL AND INDY ON WED BRINGING DIMINISHING RAIN AND THUNDER CHANCES FROM NW TO SE THROUGH THE DAY. 1016 MB HIGH BUILDING INTO MICHIGAN WED AND THUR. THE 12Z RUN OF THE GFS IS KEYING IN ON SOME CONVECTIVE QPF GENERALLY SOUTH OF I-80 ON FRI AND SAT WITH WEAK BOUNDARY JUST SOUTH OF CWA. ALL PERTURBATIONS OF THE GFS ENSEMBLE MOS FROM THE 00Z RUN WERE INDICATING LESS THAN 20 POP THROUGH THE EXTENDED. THE 06Z RUN DID NOT HINT AT THIS FEATURE. EVEN IN THE LATEST RUN THE MAIN MID/UPR LEVEL ENERGY ASSOCIATED WITH THE NRN STREAM IS N OF THE CANADIAN BORDER. THUS...WILL MAINTAIN A DRY EXTENDED THURS-TUES. THE BIGGER WEATHER STORY SHOULD BE THE WARM UP BY SUNDAY AHEAD OF THE NEXT COLD FRONT. MODELS INDICATE H8 TEMPS IN EXCESS OF 20C PUSHING INTO NRN IL. THIS SHOULD YIELD HIGHS IN THE LOWER 90S THIS WEEKEND WITH PERHAPS A FEW MID 90S PRIOR TO FROPA ON SUN. I DID KNOCK BACK TEMPS A FEW DEGREES FOR MON AS IF THE FRONT DOES CLEAR THE AREA BY THEN...TEMPS COULD BE SIGNIFICANTLY COOLER THAN WAS FORECAST. RRH && .AVIATION DISCUSSION 00Z TAFS... 700 PM CDT NOT TOO MANY CHANGES WERE MADE TO THE TAFS WITH CONTINUED FOCUS ON CIGS/VSBYS THROUGH TOMORROW MORNING. SURFACE ANALYSIS FROM 23Z INDICATES SURFACE BOUNDARY STILL LYING JUST SOUTH OF THE TERMINALS. ANOTHER SHORT WAVE/UPPER JET STREAK IS ALSO PROGRESSING THROUGH THE WEST/SOUTHWEST UPPER FLOW WHICH HAS LED TO SOME RENEWED THUNDERSTORM DEVELOPMENT SOUTH OF THIS BOUNDARY. THIS TROUGH IS BEGINNING TO SHOW SOME SIGNS OF ADVANCING SOUTHWARD AND THIS TREND WILL CONTINUE THROUGH THE EVENING WITH PASSAGE OF THIS SHORT WAVE TROUGH. SHOWER COVERAGE ACROSS FAR NORTHERN ILLINOIS SHOULD REMAIN SCATTERED...AND WILL CONTINUE TO COVER THIS WITH A TEMPO GROUP THIS EVENING WITH MORE WIDESPREAD SHRA/TSRA LIKELY REMAINING SOUTH OF THE TERMINALS WHERE BETTER UPPER FORCING IS LIKELY TO PERSIST AND WHERE A LITTLE BETTER LOW LEVEL CONVG WILL BE LOCATED IN ASSOCIATION WITH THE SURFACE TROUGH. WILL NOT INCLUDE THUNDER AS FAR NORTH AS THE TERMINALS WITH ACARS SOUNDINGS INDICATING NEARLY MOIST ADIABATIC PROFILES. WITH RAINFALL OF TODAY AND ABUNDANT LOW LEVEL MOISTURE PERSISTING THROUGH THE NIGHT...THINK THAT IFR CIGS WILL REFORM IN THE 02Z-03Z TIME FRAME WITH LIFR CIGS 400 FT POSSIBLE AFTER 06Z. CURRENT THINKING IS THAT IF THESE LIFR CIGS DO FORM...CIGS SHOULD BE GO BACK TO IFR IN THE 10Z-12Z TIME FRAME AS SOME SLIGHTLY DRIER LOW LEVEL AIR ADVECTS INTO NORTHERN ILLINOIS. GYY WILL BE A LITTLE SLOWER TO IMPROVE...BUT WILL TREND ALL TAF SITES TO MVFR CIGS BY 15Z. WILL ALSO DROP VSBYS DOWN INTO IFR RANGE BY 06Z...WITH IMPROVEMENTS BACK INTO THE 3-5SM RANGE BY 15Z. WITH NORTHEAST LOW LEVEL FLOW DEVELOPING BY WEDNESDAY AFTERNOON...IT WILL BE DIFFICULT TO MIX OUT LOW LEVEL MOISTURE...SO WILL MAINTAIN HIGH END MVFR CIGS THROUGH THE END OF THE TAF PERIOD. NDM && .LOT WATCHES/WARNINGS/ADVISORIES... .IL...NONE. .IN...NONE. .LM...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 430 PM CDT TUE JUL 11 2006 ILZ003>006-008-010>014-019>022-023-032-033-039-INZ001-002-010-011- 019-120930- WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DU PAGE-COOK- LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD- LAKE IN-PORTER-NEWTON-JASPER-BENTON- 430 PM CDT TUE JUL 11 2006 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE... TONIGHT RAIN AND SCATTERED THUNDERSTORMS WILL CONTINUE THROUGH THE EVENING AND INTO THE OVERNIGHT. LOCALLY HEAVY RAIN WILL BE POSSIBLE WITH RAINFALL AMOUNTS OF 1 TO 2 INCHES POSSIBLE. THIS MAY CAUSE LOCALIZED PONDING OF WATER IN LOW LYING AND FLOOD PRONE AREAS. .DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY AND WEDNESDAY NIGHT... SOUTH OF INTERSTATE 80. NO SEVERE WEATHER IS EXPECTED. HOT AND HUMID WEATHER IS EXPECTED TO RETURN TO THE REGION BEGINNING FRIDAY...AND LASTING THROUGH THE WEEKEND. HIGH TEMPERATURES ARE EXPECTED TO REACH THE LOWER 90S ON SATURDAY...AND THE MIDDLE 90S ON SUNDAY. AFTERNOON HEAT INDICES WILL REACH THE UPPER 90S ON SATURDAY...AND NEAR 100 ON SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NECESSARY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE) LMZ740>745-766-120930- WINTHROP HARBOR IL TO MICHIGAN CITY IN- LAKE MICHIGAN- 430 PM CDT TUE JUL 11 2006 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE... TONIGHT ISOLATED THUNDERSTORMS WILL BE POSSIBLE ACROSS SOUTHERN LAKE MICHIGAN. NO SEVERE WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE)
The Chicago radar (KLOT), 20 km away, was scanning. The volume nearest the first event began at 04:28 UTC.
1 flood, 1 flash flood. Local standard time, as filed.
One foot of water covering Route 1, one mile south of Beecher. Peotone measured 2.02 inches of rainfall.
Six inches of flowing water over streets in Chatsworth, where 4.90 inches of rain was measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2006Every state in 2006This day in weather historyWarnings in Illinois, July 2006
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5519115, 5519116.