1 flood, 1 thunderstorm wind, as filed by the National Weather Service.
Every event with a place to put it; 1 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 27, 1:50 PM CST, 3 hours 21 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 250 PM CDT THU JUL 27 2006 .DISCUSSION... ...HEAT WATCH FOR COOK COUNTY FROM NOON SATURDAY THROUGH 8 PM NEXT TUESDAY WILL BE ISSUED WITH 330 PM ZONES TODAY... FORECAST FOCUS REMAINS HEAT WAVE THIS WEEKEND INTO NEXT WEEK AND POTENTIAL FOR SVR STORMS/HVY RAIN/DENSE FOG TONIGHT. CONVECTION DEVELOPED ACROSS SOUTHERN WI AND ACROSS CENTRAL IL INTO THE SOUTHERN PART OF THE CWA. SHORTWAVE MOVES ACROSS MO/IL THIS EVENING AND OVERNIGHT. EXPECT PRECIP TO CONTINUE TO INCREASE IN COVERAGE AND INTENSITY THIS EVENING AND OVERNIGHT ACROSS THE SOUTH. EXPECT THREAT OF SVR TO BE RATHER ISOLATED AND JUST WIND WITH FREEZING LEVELS ABOVE 15KFT...AND ONLY THRU SUNSET. MAIN PROBLEM THIS EVENING LIKELY TO BE HEAVY RAIN AND POSSIBLY LOCALIZED FLOODING WITH STORMS MOVING OVER THE SAME LOCATIONS AND PRECIPITABLE WATER VALUES NEAR 2 INCHES. WHILE SOME AREAS DID SEE AN INCH OR TWO OF RAIN ACROSS THE FAR SOUTHEAST LAST NIGHT...IF ANY FLOODING DOES DEVELOP ACROSS THE SOUTHERN CWA...IT SHOULD BE RATHER ISOLATED AND NO FLOOD WATCH AT THIS TIME. ACTIVITY SHOULD BE DECREASING FROM NORTH TO SOUTH LATE EVENING AND OVERNIGHT AND WITH SOME CLEARING SKIES AND CONTINUED LIGHT WINDS...EXPECT FOG TO BECOME A PROBLEM AGAIN ACROSS THE NW CWA WITH SOME DENSE FOG POSSIBLE. A WEAK SHORTWAVE MOVES ACROSS THE AREA FRIDAY AFTERNOON WHICH MAY BE ENOUGH FOR AN ISOLATED STORM BUT WILL MAINTAIN DRY FORECAST. FOCUS OF THE REST OF THE FORECAST REMAINS DEVELOPING HEAT WAVE AS UPPER RIDGE BUILDS ACROSS THE MIDWEST. BIGGEST FORECAST PROBLEM REGARDING SPECIFICS ON HEAT/HUMIDITY ARE THE DEWPOINTS. OTHER CONTRIBUTING FACTORS ARE POTENTIAL LAKE BREEZES AND A WEAK FRONT SAT EVENING. FIRST THE DEWPOINTS...WITH NO SIGNIFICANT CHANGES IN THE AIRMASS EXPECTED OVER THE NEXT SEVERAL DAYS...LOWER/MID 70 DEWPOINTS LOOK ON TRACK. DEWPOINTS MAY REMAIN IN THE MID 70S OR TAG UPPER 70S FROM TIME TO TIME BUT CONFIDENCE ON WHEN THIS MIGHT OCCUR IS LOW. NORMALLY EXPECT MIXING OF LOW LEVELS TO ALLOW DRIER AIR TO MIX TO THE SFC DURING THE AFTERNOON HRS. HOWEVER...LOOKING AT FORECAST SOUNDINGS ACROSS THE AREA THIS WEEKEND AND NEXT WEEK SHOWS LIMITED MIXING POTENTIAL AND DEWPOINTS STILL IN THE UPPER 60S SEVERAL THOUSAND FEET ALOFT. THUS...MIXING WILL HAVE SMALL/IF ANY AFFECT ON LOWERING DEWPOINTS. AS A RESULT HAVE MAINTAINED MAINLY LOWER 70S DEWPOINTS THRU THE PERIOD. LOW CLOUDS FRI MORNING LIMITING SUNSHINE TO START AND A LAKE BREEZE FRI AFTERNOON SHOULD KEEP HIGHS AROUND 90 AND HEAT INDICES IN THE UPPER 90S. TEMPS INCREASE A FEW DEGREES SATURDAY BUT THE WRF NOW SHOWS A COLD FRONT SINKING SOUTH INTO FAR NE IL BY 00Z SUNDAY. THIS WAS ORIGINALLY SEEN ON THE GFS 2 DAYS AGO SO THERE IS SOME HISTORY WITH THIS FEATURE. FOR NOW HAVE GONE WITH THE GFS KEEPING SOUTHERLY FLOW ACROSS THE AREA AND THIS BOUNDARY WELL NORTH. IF THE WRF DOES PAN OUT...FRONT WILL LIKELY ARRIVE AFTER PEAK HEATING...THUS MID 90S AND HEAT INDICES 100+ SEEM REASONABLE. MODELS CONSISTENT WITH SUNDAY AND MONDAY BEING THE TWO HOTTEST DAYS WITH HIGHS REACHING THE MID 90S AND HEAT INDICES NEAR 105...WHICH IS BASED OFF LOWER 70S DEWPOINTS. CERTAINLY POSSIBLE TO SEE HIGHER DEWPOINTS AND THUS HIGHER HEAT INDICES DURING THIS TIME. SW FLOW SHOULD BE STRONG ENOUGH TO PREVENT A LAKE BREEZE SUNDAY/MONDAY. LOW TEMPS BY THIS TIME LIKELY ONLY IN THE MID 70S WITH CGX/DOWNTOWN REMAINING NEAR 80. TUESDAY REMAINS IN THE 90S WITH FROPA ARRIVING LATE TUESDAY NIGHT...MORE LIKELY WEDNESDAY BRINGING THE NEXT CHANCE OF PRECIP AND COOLER TEMPS. && .AVIATION DISCUSSION CONCERNING 18Z TAFS... SOUTHERN TAFS REMAIN UNDER ST/SC RESULTING FROM OVERNIGHT FG. NORTHERN ONLY RECENTLY BEGINNING TO BREAK OPEN. CONERN WITH THIS IS CHANCE FOR TSTM DEVELOPMENT THIS AFTERNOON. WITH WEAK UPPER SUPPORT DELAY IN DIURNAL HEATING MAY WELL BE LIMITING FACTOR IN DEVELOPMENT IN NORTHERN IL THIS AFTERNOON. ALTHOUGH THIS DOES NOT RULE OUT ADVECTION PARTICULALY FROM STORMS NOW DEVELOPING OVER CENTRAL IL, POINT CHANCE FOR PRECIP AT THIS TIME TOO DIFFICULT TO STATE WITH ANY CERTAINTY. HAVE CHOSEN TO CONTINUE DRY FORECAST WITH UNDERSTANDING THAT IF THERE IS DEVELOPMENT BEST CHANCES WOULD BE LATE THIS AFTERNOON AND EARLY THIS EVENING. ONCE SC BREAKUP IS COMPLETE ONLY EXPECT DEBRIS FROM SURROUNDING STORMS IN TERMS OF CLOUD COVER UNTIL OVERNIGHT. WITH HIGH DEWPOINT AIRMASS REMAINING OVER AREA WOULD EXPECT BR/FG DEVELOPMENT AGAIN TONIGHT WITH ATTENDANT LOWERING OF CIGS. BEGIN THE PROCESS OF LOWERING VSBYS ABY MIDNIGHT WITH CIGS BEGINNING TO DEVELOP BY 09Z. LOWEST CIGS/VSBYS EXPECT AROUND SR. REMAINDER OF TAF PERIOD DEVELOPS MUCH LIKE TODAY WITH DISSIPATION OF SC/BR THROUGH LATE MORNING. WINDS TO REMAIND LIGTH -- AROUND 5KTS. THOUGH HAVE INDICATED VRB WEAK GRADIENT SUGGESTS SOUTHWEST AS PREFERRED DIRECTION. GIVEN THAT, SEE WIDE VARIATION IN OBSERVED DIRECTIONS. MAIN POINT IS THAT SPEEDS REAMIN LIGHT. && .LOT WATCHES/WARNINGS/ADVISORIES... .IL...HEAT WATCH COOK COUNTY NOON SATURDAY THRU 8 PM NEXT TUESDAY. .IN...NONE. .LM...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 400 PM CDT THU JUL 27 2006 ILZ003>006-008-010>014-019>022-023-032-033-039-INZ001-002-010-011- 019-280930- 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 JUL 27 2006 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE... TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE AREA THIS EVENING. THE MAIN THREATS WILL BE DAMAGING WINDS AND HEAVY RAIN...WHICH MAY CAUSE LOCALIZED FLOODING. AREAS OF FOG WILL BE POSSIBLE AFTER MIDNIGHT. THE FOG MAY BE DENSE ACROSS PARTS OF NORTHWEST ILLINOIS. .DAYS TWO THROUGH SEVEN... FRIDAY THROUGH WEDNESDAY HOT AND HUMID CONDITIONS WILL AFFECT THE ENTIRE AREA FROM SATURDAY THROUGH TUESDAY. HIGH TEMPERATURES THROUGH THIS PERIOD WILL BE IN THE MID 90S. THE COMBINATION OF THE HEAT AND HUMIDITY WILL PRODUCE PEAK AFTERNOON HEAT INDICES BETWEEN 100 TO 105 SATURDAY THROUGH TUESDAY. THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS WILL BE NEEDED THIS EVENING. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE) LMZ740>745-766-280930- WINTHROP HARBOR IL TO MICHIGAN CITY IN- LAKE MICHIGAN- 400 PM CDT THU JUL 27 2006 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE... TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING. THE MAIN THREAT WILL BE DAMAGING WINDS. AREAS OF FOG WILL BE POSSIBLE AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN... FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE)
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
549 PM CDT THU JUL 27 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0525 PM FLOOD JOLIET 41.53N 88.12W
07/27/2006 WILL IL TRAINED SPOTTER
SPRINGFIELD AND GLENWOOD STREETS - 10 TO 12 INCHES OF
WATER ON ROAD.
&&
WENPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
551 PM CDT THU JUL 27 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0527 PM FLOOD JOLIET 41.53N 88.12W
07/27/2006 WILL IL TRAINED SPOTTER
INTERSECTION OF RAYNOR AND INGALLS STREETS. 12 TO 16
INCHES OF WATER ON ROAD.
&&
WENPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
553 PM CDT THU JUL 27 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0532 PM HEAVY RAIN JOLIET 41.53N 88.12W
07/27/2006 M0.00 INCH WILL IL TRAINED SPOTTER
5.5 INCHES OF RAIN IN 90 MINUTES AT BLACK RD AND INFANTRY
DRIVE.
&&
WENPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
555 PM CDT THU JUL 27 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0535 PM HEAVY RAIN 4 WSW MUNDELEIN 42.24N 88.08W
07/27/2006 M1.70 INCH LAKE IL CO-OP OBSERVER
1.70 INCHES OF RAIN IN 50 MINUTES.
&&
WENPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
604 PM CDT THU JUL 27 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0559 PM FLOOD JOLIET 41.53N 88.12W
07/27/2006 WILL IL TRAINED SPOTTER
US-52 AND HOULBOLT - 8 INCHES OF WATER ON ROAD.
&&
WENPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
605 PM CDT THU JUL 27 2006
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM FLOOD NEW LENOX 41.52N 87.98W
07/27/2006 WILL IL TRAINED SPOTTER
GOUGER ROAD SOUTH OF US-30. 6 INCHES OF STANDING WATER.
&&
WENThe Chicago radar (KLOT), 61 km away, was scanning. The volume nearest the first event began at 00:27 UTC.
1 flood, 1 thunderstorm wind. Local standard time, as filed.
Four inches of water reported on Route 41, three quarters of a mile south of Route 30.
A 30 foot tall tree was blown down along the county line, 2 miles west of Westville in Porter County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2006Every state in 2006This day in weather historyWarnings in Indiana, 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: 5519452, 5519453.