8 thunderstorm wind, 4 lightning, 2 flood, as filed by the National Weather Service.
Every event with a place to put it; 6 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 Aug 10, 5:45 AM CST, 1 hour 8 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 645 AM CDT THU AUG 10 2006 .DISCUSSION FOR MORNING GRIDS/ZONES... 430 AM CDT WITH MODELS NOT VERIFYING ESPECIALLY WELL IN SHORT TERM AM RELYING MORE ON RADAR AND SATELLITE TRENDS FOR DETAILS OF TODAY/S FORECAST...AND MODEL OUTPUT FOR SYNOPTIC SCALE GUIDANCE. S/WV THAT LIFTED NEWRD FM CO WED HAS IGNITED LARGE TSRA CLUSTER IN ERN NEB...WHILE INCREASED SPEED CONVERGENCE AT NOSE OF LLVL JET FORCING SCT TSRA DVLPMNT INTO E CNTRL IA AND NRN IL TO THE N OF THE SFC. WHILE TYPICAL DIURNAL DEC IN ACTIVITY ANTICIPATED AFT SUNRISE...BAROCLINIC ZONE SHUD REMAIN ACTIVE WITH SIG CAPE IN PLACE ACROSS APPROX S HALF OF CWA WHERE SFC DWPTS ALREADY IN LO AND MID 70S. EXPECT RENEWED TSRA DVLPMNT OVR ALL BUT FAR NERN CWA THIS AFTERNOON AS S/WV TURNS SEWRD AND DROPS ACROSS NW AND E CNTRL IL LATER TODAY. CONTD CHC FOR TSRA AS S/WV OVR ND TRACKS SEWRD ACROSS UPR MIDWEST. FOR FRI SFC BNDRY FCST TO BE NR LWR OH VALLEY AND ACROSS SRN IL AND ALLOWING ENUF DRYING I ANTICYCLONIC LLVL FLO TO PREVENT ANY PCPN EVEN THO ANOTHER S/WV FCST TO TRAVERSE REGION DURG THE DAY. TREND OF UPPER PATTERN REMAINS THE SAME THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK TROF DEEPENS OVER EASTERN CANADA AND NEW ENGLAND TODAY AND FRI WHILE RDG BUILDS ACROSS THE PLAINS AND S CENTRAL CANADA AS TROF MOVES INTO B.C. AND PAC NW COAST. THIS ALLOWS SFC HI PRES RDG TO BUILD S FROM ONTARIO ACROSS THE GRTLKS AND MIDWEST FRI AND SAT. WESTERN UPR TROF EVENTUALLY MOVES INTO THE UPR MIDWEST AND WERSTERN GRTLKS DURG MON AND MON NITE WITH ASSOCIATED CDFNT DROPPING SEWRD THRU REGION WITH RETURN OF THREAT OF TSRA. TRS && .AVIATION DISCUSSION REGARDING 12Z TAFS... MAIN PROBLEM TDY WILL BE VRBL CIGS...ESP IN/NR TSTMS...AND POTL FOR TSTM DVLPMT. CIGS TO RANGE FROM LOW RANGE MVFR TO VFR MOST OF THIS MRNG. WILL GO WITH MORE CONTINUOUS MVFR CIGS AFT FRONTAL WAVE...NOW OVR MO/IA BORDER AREA SHIFTS TO S OF TERMINALS BY 18Z. THIS WILL ALLOW INCRS IN COOLER NELY LLVL FLOW AND SHOULD PROMOTE LWR CIGS THAT NEW GUIDANCE KEEPS ACRS AREA THRU 12Z FRI. WITH SFC DEW POINT ARND 70 F...AREAS OF FOG/HAZE WILL PERSIST MUCH OF THIS MRNG. OTHER CONCERN...OF COURSE...IS TSTM DVLPMT. SFC ANALYSIS SHOWS FRONTAL BOUNDARY FRO MO/IA BORDER...EWD ACRS CNTRL IL. CLUSTER OF TSTMS WILL PROPAGATE SEWD TO N OF THIS BOUNDARY THRU 18Z. ALTHOUGH CORE OF THIS ACTIVITY WILL STAY S OF TERMINALS AND BE MAINLY AN ATC PROBLEM...EXPECT SOME THUNDER/LGT RAIN MAY EXTEND NWD OUT OF ASSD ANVIL CANOPY...ACRS NRN IL/NWRN IND. THIS WILL SHIFT S OF TERMINALY BY 18Z. MERZLOCK && .LOT WATCHES/WARNINGS/ADVISORIES... .IL...NONE. .IN...NONE. .LM...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 445 AM CDT THU AUG 10 2006 ILZ003>006-008-010>014-019>022-023-032-033-039-INZ001-002-010-011- 019-102200- 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- 445 AM CDT THU AUG 10 2006 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE...TODAY AND TONIGHT THERE WILL BE SCATTERED THUNDERSTORMS THIS MORNING SOUTH OF A DIXON TO VALPARAISO LINE...WITH A CHANCE OF MORE THUNDERSTORMS THIS AFTERNOON INTO TONIGHT IN THAT AREA AS WELL. THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS...WITH DAMAGING WINDS THE MAIN THREAT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF THUNDERSTORMS SUNDAY NIGHT AND MONDAY. SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY TODAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-766-102200- WINTHROP HARBOR IL TO MICHIGAN CITY IN- LAKE MICHIGAN- 445 AM CDT THU AUG 10 2006 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT WILL OCCUR TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT WILL PERSIST INTO FRIDAY. THERE IS A CHANCE OF THUNDERSTORMS SUNDAY NIGHT AND MONDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO
The Chicago radar (KLOT), 102 km away, was scanning. The volume nearest the first event began at 12:59 UTC.
8 thunderstorm wind, 4 lightning, 2 flood. Local standard time, as filed.
Lightning struck a utility pole, the pole and power lines caught on fire.
Two and a half foot diameter tree blown down. Power lines also blown down.
Wind gusts were estimated to 60 mph.
Wind gusts were estimated to 70 mph, which blew down trees, tree limbs and power lines.
Wind gusts to 62 mph were measured by a spotter.
A large tree was blown down at US 52 and Stevens Road.
Lightning struck a car on Interstate 55 near Gardner and blew out the windows.
Lightning struck a car on Interstate 80 near Minooka.
Tree limbs were blown down along Route 1, north of Watseka blocking the road. Several trees and tree limbs were blown down in Watseka. Two farm sheds were blown down at 1978E and 2300N. Power lines were also blown down.
Lightning struck a house in the Springwood Subdivision, a second house near Origon and Ingles, and a third house near Earl and Jefferson. A bolt of lightning also struck a transformer.
A 14 inch diameter tree was blown down near Mcardle and Higgins, partially blocking Higgins Road.
Six inches of standing water on Renwick Road, a quarter mile east of Route 59.
One foot of water was reported covering numerous roads near St. Joseph Medical Center and 18 inches of standing water was reported under a viaduct near Briggs and Route 30. Rainfall reports included 3.50 inches near Infantry Drive and Black Roads, 1.91 inches near Theodore and Larkin and 1.75 inches at the Joliet Lock and Dam.
A large tree was blown down at Park and First Streets.
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, August 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: 5525508, 5525435, 5525434, 5525436, 5525498, 5525499, 5525500, 5525501, 5525502, 5525503, 5525504, 5525506, 5525507, 5525505.