1 hail, as filed by the National Weather Service.
Every event with a place to put it. 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 4, 5:30 PM CST, 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 630 PM CDT THU AUG 4 2005 .DISCUSSION FOR AFTERNOON ZONES/GRIDS... AS HAS BEEN CASE SO OFTEN THIS WRM SEASON...SHRA/TSRA HAS DVLPD ON PRE-FRONTAL BNDRY JUST TO E AND S OF MOST OF CHI METRO AREA. AT 20Z CFDNT CURVING FM RAC TO SWWRD TO QUAD CITIES. SFCDWTS IN LWR TO MID 70S AHD OF CDFNT BUT LTL IN WAY OF LLVL CONVERGENCE OR UPR SUPPORT WITH ONLY A FEW WK RADAR RETURN DETECTED. FEW MORE ECHOES FM NERN IA BACK ACROSS NEB INTO NWRN KS FM MAINLY MID LVL CLOUDS ALONG MID/UPR LVL TROF AXIS. SERN COUNTIES MAY SEE SOME ISOLD/WDLY SCT -SHRA ERLY EVE TIL FROPA. STG LLVL DRYING BEHIND BNDRY SO DON/T EXPECT ANYTHING ASSOCIATED WITH SHRT/WV TROF PASSAGE LATER TONIGHT. COOLER...AND MUCH MORE COMFORTABLE AIRMASS MOVES IN LATE TONIGHT AS FLO BCMS NWRLY ACROSS UPR MIDWEST AS UPR TROF CONTS TO ROTATE INTO ONT AND WRN QUEBEC BY FRI MORNING. REFRESHING DWPTS IN MID 40S TO LWR 50S NOTED UPSTRM ACROSS DKTS...MN AND NRN WI. SFC RDG GRADUALLY PASSING ACROSS REGION FRI AND SAT KEEPS DRY AIR ACROSS FA WITH WARM DAYS AND COOL NITES. DWPTS START TO CREEP UP AGAIN SUN ON BACK SIDE OF SFC RDG BUT STILL ONLY TO MOD LVLS. LOW CHC POPS MON NITE THRU WED WITH LONGER RANGE MODELS SUGGESTING POTENTIAL FOR SCT CONVECTION AS SHRTWV MOVS OUT OF CNTRL PLAINS INTO MID MS VALLEY WITH INCRG GULD MOISTURE SPREADING NWRD INTO REGION. TRS && .AVIATION DISCUSSION FOR 00Z TAFS... AT 23Z FRONT PAST CHI TAFS HEADING QUIKLY FOR GYY. SO WINDS GOING WNW WITH FROPA. WINDS TO GO MORE NNW THRU NIGHT AND THEN NNE TOMORROW AS WINDS COME DOWN LAKE. JUST SOME SCT CLOUDS. ALL TS S OF SITES. AF && .WARNINGS/ADVISORIES... .IL...NONE. .IN...NONE. .LK MI...NONE.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 400 PM CDT THU AUG 4 2005 ILZ003>006-008-010>014-019>022-023-032-033-039-INZ001-002-010-011- 019-051100- 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- 400 PM CDT THU AUG 4 2005 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE...TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE FOR THUNDERSTORMS MONDAY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE) LMZ740>745-766-051100- WINTHROP HARBOR IL TO MICHIGAN CITY IN- LAKE MICHIGAN- 400 PM CDT THU AUG 4 2005 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE FOR THUNDERSTORMS FROM MONDAY NIGHT THROUGH TUESDAY NIGHT. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE)
The Chicago radar (KLOT), 85 km away, was scanning. The volume nearest the first event began at 00:08 UTC.
1 hail. Local standard time, as filed.
A thunderstorm moved across northeast Livingston County during the evening hours of Thursday, August 4th. The storm produced a swath of hail up to the size of quarters as well as torrential rain. In Broughton Township in northeast Livingston County, 2.6 inches of rain was reported along with visible hail damage to some crops.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2005Every state in 2005This day in weather historyWarnings in Illinois, August 2005
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: 5475707.