Heavy rain fell across parts of northern Illinois during the morning hours of August 3rd producing flash flooding.
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 episode as NWS LOT wrote it up.
Heavy rain fell across parts of northern Illinois during the morning hours of August 3rd producing flash flooding.
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 3, 3:04 AM CST, 59 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 404 AM CDT TUE AUG 3 2010 .DISCUSSION... 354 AM CDT BIGGEST FORECAST HURDLES TODAY INCLUDE THE EVOLUTION OF THE MCS THIS MORNING AND THEN TIMING/PLACEMENT OF SUBSEQUENT MCS'S AROUND THE RING OF FIRE. SECONDARY CONCERN IS WITH TEMPS AS WE SIT ON THE EDGE OF THE OPPRESSIVE DOME OF HEAT BAKING AREAS JUST TO OUR SOUTH AND SOUTHWEST. CLASSIC RING OF FIRE PATTERN SHOULD CONTINUE FOR THE NEXT COUPLE OF DAY AS VERY LOW AMPLITUDE WAVES KICK OFF PRIMARILY NOCTURNAL MCS'S. UNFORTUNATELY NUMERICAL GUIDANCE TENDS TO STRUGGLE WITH SUCH LOW AMPLITUDE WAVES WHICH MAKES IT PRETTY MUCH USELESS FOR ANYTHING SUB-SYNOPTIC SCALE. REALLY BASING THE FORECAST FOR THE NEXT 24-30 HOURS MOSTLY ON RADAR AND SATELLITE DATA. WITH THAT MIND...APPEARS AS THOUGH THE SOMEWHAT LOOSELY ORGANIZED MCS SHOULD TRAVERSE THE CWA THROUGH EARLY THIS MORNING. PWATS ARE VERY HIGH...SO THUNDERSTORMS WILL BE EXTREMELY EFFICIENT RAIN PRODUCERS. RADAR ESTIMATES INDICATE THAT SOME OF THE CELLS MOVING OVER KANE COUNTY LAST HOUR DROPPED AN INCH OF RAIN IN 20 MINUTES AND COULD SEE SOME 2"+/HR RAINFALL RATES WITH THIS MORNINGS CONVECTION. HAVE OPTED TO HOLD OFF ON A SHORT LEAD TIME FLASH FLOOD WATCH SINCE THE MCS IS NOT VERY WELL ORGANIZED NOW AND ALREADY SEEING THE LOW LEVEL JET BEGINNING TO VEER ON PROFILER NETWORK. WHILE NOT EXPECTING WIDESPREAD OR SIGNIFICANT ENOUGH FLASH FLOODING TO WARRANT A WATCH...DO THINK THERE COULD BE A FFW OR TWO AS THIS SYSTEM MOVES THROUGH THIS MORNING. EXPECT TO SEE MCS TO MOVE OUT PRETTY EXPEDITIOUSLY THIS MORNING WITH SKIES CLEARING OUT BY/DURING THE AFTERNOON. THIS SHOULD ALLOW FOR US TO HEAT UP PRETTY NICELY. DESPITE THIS...THINK OUR CHANCES FOR ADDITIONAL STORMS THIS AFTERNOON ARE NOT VERY HIGH. FIRST...IT LOOKS LIKE WE WILL BE BETWEEN WAVES WITH NO REAL SUPPORT ALOFT EVIDENT ON WATER VAPOR UPSTREAM. SECOND...WHATEVER CONVECTIVE BOUNDARY THERE IS LEFT OVER FROM THIS MORNINGS STORMS LOOKS LIKE IT COULD SET UP PRETTY FAR SOUTH SO THAT EVEN IF IT DOES KICK OFF STORMS THEY'D BE IN MAINLY IN OUR SOUTHERN CWA. NEXT FEATURE OF INTEREST APPEARS TO BE THE MCV THATS DEVELOPING WITH THE MCS OVER NW KS/SW NE EARLY THIS MORNING. THIS IS DEVELOPING ALONG THE SOUTHERN EDGE OF THE 25-35KT MID LEVEL FLOW...WHICH SHOULD DO A NICE JOB OF ADVECTING THIS FEATURE EASTWARD INTO IOWA THIS AFTERNOON. THINK THAT BEST CHANCE OF AFTERNOON STORM DEVELOPMENT MAY BE IN IOWA WITH A POTENTIAL FOR ANOTHER LOOSELY ORGANIZED MCS MOVING ACROSS NORTHERN ILLINOIS TONIGHT. CANT FIND A MODEL THAT SUGGESTS ANYTHING LIKE THIS HAPPENING SO HAVE OPTED TO KEEP POPS MODEST (30-40%) RANGE TONIGHT...HOWEVER IF THIS SCENARIO UNFOLDS THE POTENTIAL WOULD CERTAINLY EXIST FOR HEAVY RAINFALL AND POSSIBLY FLASH FLOODING GIVEN THE ENVIRONMENT. OVERALL SEVERE THREAT LOOKS PRETTY MARGINAL TODAY/TONIGHT WITH MOIST ATMOSPHERE AND WEAK LAPSE RATES. SUPPOSE THERE COULD BE A WET MICROBURST POTENTIAL IF SOMETHING WERE TO POP THIS AFTERNOON GIVEN THE DRYING MID/UPPER LEVELS AND STRONG INSTABILITY...BUT OTHERWISE THINK SEVERE THREAT IS QUITE LOW. RING OF FIRE PATTERN SHOULD CONTINUE WITH INTERMITTENT MCS'S INTO MID WEEK...THOUGH WITH TIME SUSPECT THE SUBSEQUENT MCS'S WILL TEND TO TRACK FARTHER SOUTHWARD...PARTICULARLY HEADING INTO WEDNESDAY NIGHT/THURSDAY AS UPPER FLOW BEGINS TO AMPLIFY WITH DEVELOPING LONG WAVE TROUGH OVER EASTERN NORTH AMERICA. THE AMPLIFYING TROUGH STILL LOOKS LIKE IT WILL PROVIDE THE AREA WITH SOME REALLY SPECTACULAR WEATHER FRIDAY INTO THE WEEKEND WITH MILD TEMPERATURES...LOW HUMIDITY...AND A FAIR AMOUNT OF SUNSHINE. IZZI && .HYDROLOGY... 320 PM CDT THERE IS A POSSIBILITY OF HEAVY RAIN THAT COULD CAUSE SOME LOCAL FLOODING. THE RAIN MAY KEEP THE ROCK...PECATONICA AND FOX RIVERS IN FLOOD. THE HIGHEST FORECAST PRECIPITATION MAY REACH AN INCH IN 3 HOURS WITH SOME OF THE THUNDERSTORMS. THE THUNDERSTORMS AND SHOWERS MAY MOVE OVER THE SAME LOCATION SEVERAL TIMES AND THAT IS WHAT MAY PRODUCE THE HEAVY RAIN. && .AVIATION... //ORD AND MDW CONCERNS...UPDATED 08Z... * CLUSTERS OF CONVECTION THAT HAVE DEVELOPED IN THE LAST HOUR THAT WILL IMPACT THE TERMINALS BY 09Z OR SO. * SHRA/TSRA POTENTIAL AROUND AND AFTER DAYBREAK IN ASSOCIATION WITH LARGE COMPLEX APPROACHING FROM IOWA. * POTENTIAL FOR MVFR CIGS AROUND 2500 FT PRIOR TO 14Z. * LOW CHANCES FOR SHRA/TSRA THIS AFTERNOON AND THIS EVENING MDB //DISCUSSION...UPDATED 08Z... SHRA/TSRA CHANCES REMAIN THE MAIN FORECAST CHALLENGE THROUGH THE PERIOD. A SERIES OF SHORTWAVE TROUGHS CONTINUE TO MARCH ACROSS THE AREA GENERATING CONVECTION. A CLUSTER OF CONVECTION HAS DEVELOPED ACROSS THE FAR WESTERN CHI METRO AREA IN THE LAST HOUR AND IS NOW MARCHING EASTWARD TOWARDS THE CHI TERMINALS AND KGYY. THIS CLUSTER WILL LIKELY BRING VSBY DOWN TO MVFR/IFR FOR A SHORT TIME ALONG WITH HEAVY DOWNPOURS. ADDITIONAL SCATTERED DEVELOPMENT HAS TAKEN PLACE FURTHER WEST ALONG THE IA/IL BORDER AHEAD OF MUCH MORE EXPANSIVE COMPLEX WHICH IS ALSO MOVING EASTWARD. THE COMPLEX IS EXPECTED TO TURN SLIGHTLY SOUTHEASTWARD AS IT MOVIES INTO WESTERN IL. SOME DEVELOPMENT HAS TAKEN PLACE FURTHER NORTH BUT STILL EXPECT THIS CHANGE IN COURSE. STILL THINK THIS WILL STAY JUST SOUTHWEST OF THE TERMINALS AND PRIMARILY STAY ALONG AND SOUTH OF INTERSTATE 80. HOWEVER...SCATTERED ACTIVITY MAY PERCOLATE TO THE NORTH SO WILL CONTINUE WITH PRECIP MENTION AT THE TERMINALS THROUGH MID/LATE MORNING. BAND OF MVFR CLOUDS HAVE DEVELOPED ACROSS NORTHWEST IL AND WILL LIKELY MAKE EASTWARD PROGRESS INTO THE WESTERN CHI METRO IN THE NEXT FEW HOURS. NOT A CLEAR INDICATION ON WHETHER ORD AND MDW WILL FALL TO MVFR CIGS FOR A PROLONGED PERIOD OF TIME BUT SEVERAL HOURS WILL BE POSSIBLE PRIOR TO 14Z OR SO. WIND DIRECTION WILL BE ERRATIC THIS MORNING WITH THE SHRA AROUND BUT A GENERAL SOUTH TO SOUTHEAST DIRECTION PREVAILING. SHRA AND ISOLD TSRA CHANCES CONTINUE THIS AFTERNOON BUT EXPECT LESS IN THE WAY OF COVERAGE. HOWEVER...THE CONVECTIVE COMPLEX THIS MORNING WILL HELP TO DRIVE WHAT OCCURS THIS AFTERNOON. CHANCES WILL CONTINUE THIS EVENING AND AT LEAST EARLY TONIGHT BUT BE FOCUSED TO THE SOUTH OF THE TERMINALS WITH A FRONTAL BOUNDARY IN THE AREA. WIND DIRECTION LOOKS TO BECOME VARIABLE ONCE AGAIN THIS EVENING WITH LIGHT SPEEDS. WITH ABUNDANT LOW LEVEL MOISTURE MIST AND FOG WILL BE POSSIBLE. MDB //ORD AND MDW CONFIDENCE...UPDATED 08Z... * HIGH CONFIDENCE IN TSRA IMPACTING TERMINALS BY 09Z. * LOW TO MEDIUM CONFIDENCE IN THE BULK OF THE COMPLEX FROM IOWA PASSING TO THE SOUTHWEST OF THE TERMINALS AROUND DAYBREAK. * LOW TO MEDIUM CONFIDENCE IN SEVERAL HOURS OF MVFR AROUND 2500 FT PRIOR TO 14Z. MDB //OUTLOOK FOR ORD/MDW FOR 12Z WEDNESDAY-12Z SUNDAY...UPDATED 06Z... WEDNESDAY...SLIGHT CHANCE TSRA AND VFR. THURSDAY...VFR. FRIDAY...VFR. SATURDAY...VFR. SUNDAY...SLIGHT CHANCE TSRA AND VFR. MDB && .MARINE... 316 AM CDT SURFACE LOW PRESSURE ACROSS NORTHEAST KANSAS WILL MOVE INTO CENTRAL ILLINOIS LATE TONIGHT AND WILL GRADUALLY WEAKEN. ANOTHER SURFACE LOW PRESSURE AREA WILL FOLLOW A SIMILAR TRACK FROM KANSAS AND WILL REACH CENTRAL INDIANA BY THURSDAY MORNING. A RIDGE OF HIGH PRESSURE WILL BUILD BACK INTO THE MID MISSISSPPI RIVER VALLEY BEHIND THIS LOW THURSDAY NIGHT INTO FRIDAY. WINDS TODAY WILL GENERALLY REMAIN SOUTHERLY...AND THEN TRANSITION TO WESTERLY WEDNESDAY NIGHT INTO THURSDAY BEHIND THIS SFC LOW...AND THEN NORTHWESTERLY THURSDAY NIGHT INTO FRIDAY AS A BROADER AREA OF HIGH PRESSURE SLIPS SOUTHEASTWARD FROM THE NORTHERN PLAINS AND UPPER MIDWEST. WINDS EXPECTED TO SLACKEN OFF FRIDAY NIGHT AS THIS HIGH MOVES OVERHEAD...WITH A TRANSITION TO SOUTHEAST WINDS FRIDAY NIGHT INTO SATURDAY AS THE HIGH DEPARTS TO THE EAST. MARSILI && .LOT WATCHES/WARNINGS/ADVISORIES... IL...NONE. IN...NONE. LM...NONE. &&
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
456 AM CDT TUE AUG 3 2010
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
041000-
WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE-
DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-
IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON-
456 AM CDT TUE AUG 3 2010 /556 AM EDT TUE AUG 3 2010/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME MAY PRODUCE:
TORRENTIAL DOWNPOURS LEADING TO LOCALIZED FLASH FLOODING.
AREAS AFFECTED AND TIMING:
THUNDERSTORMS WILL AFFECT THE OUTLOOK AREA...MAINLY ALONG AND
SOUTH OF INTERSTATES 88 AND 290 THROUGH EARLY THIS MORNING.
ADDITIONAL THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND
TONIGHT ACROSS THE ENTIRE OUTLOOK AREA.
DISCUSSION:
A CLUSTER OF THUNDERSTORMS WILL MOVE ACROSS MOST OF THE AREA
EARLY THIS MORNING SPARING ONLY EXTREME NORTHERN ILLINOIS. SOME
OF THE STORMS WILL PRODUCE TORRENTIAL RAINFALL...POSSIBLY UP TO
2 INCHES PER HOUR...WHICH COULD RESULT IN LOCALIZED FLOODING.
ADDITIONAL THUNDERSTORMS ARE POSSIBLE AGAIN POSSIBLY AS EARLY AS
LATE THIS AFTERNOON...BUT MORE LIKELY TONIGHT. ONCE AGAIN THE
POTENTIAL WILL EXIST FOR SOME OF THE STORMS TO PRODUCE
TORRENTIAL RAINFALL AND LOCALIZED FLASH FLOODING. IN THE
UNLIKELY EVENT THAT ANY STORMS DEVELOP DURING THE AFTERNOON
HOURS...THERE WOULD BE A VERY LOW END THREAT OF LOCALIZED
DAMAGING WINDS AS WELL.
PORTIONS OF THE ROCK...PECATONICA...AND FOX RIVERS WILL REMAIN
IN FLOOD.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
ANOTHER ROUND OR TWO OF THUNDERSTORMS IS POSSIBLE THROUGH
WEDNESDAY NIGHT...WITH ONCE AGAIN A POTENTIAL FOR LOCALLY HEAVY
RAINFALL.
THERE IS ALSO A SLIGHT CHANCE OF THUNDERSTORMS AGAIN BY SUNDAY
INTO MONDAY.
PORTIONS OF THE ROCK...PECATONICA...AND FOX RIVERS WILL REMAIN
IN FLOOD.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT...
HOWEVER SPOTTERS ARE ENCOURAGED TO REPORT HEAVY RAINFALL TOTALS
TO THE NATIONAL WEATHER SERVICE CHICAGO.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
LMZ740>745-041000-
WINTHROP HARBOR TO WILMETTE HARBOR-
WILMETTE HARBOR TO NORTHERLY ISLAND-
NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY-
GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY-
456 AM CDT TUE AUG 3 2010
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.
.DAY ONE...TODAY AND TONIGHT.
THUNDERSTORMS ARE LIKELY EARLY THIS MORNING...AND POSSIBLE AGAIN
LATE THIS AFTERNOON INTO TONIGHT.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY AND WEDNESDAY
NIGHT...AND A SLIGHT CHANCE OF THUNDERSTORMS AGAIN BY SUNDAY INTO
MONDAY.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-041000-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH
FOX ISLAND 5 NM OFFSHORE-
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
456 AM CDT TUE AUG 3 2010
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.
.DAY ONE...TODAY AND TONIGHT.
THUNDERSTORMS ARE LIKELY EARLY THIS MORNING...AND POSSIBLE AGAIN
LATE THIS AFTERNOON INTO TONIGHT OVER SOUTHERN PORTIONS OF THE LAKE.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY AND WEDNESDAY
NIGHT...AND A SLIGHT CHANCE OF THUNDERSTORMS AGAIN BY SUNDAY INTO
MONDAY.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
IZZISPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
420 AM CDT TUE AUG 3 2010
ILZ008-010>012-019>021-032-031015-
DEKALB IL-GRUNDY IL-KANE IL-KENDALL IL-LA SALLE IL-LEE IL-
LIVINGSTON IL-OGLE IL-
420 AM CDT TUE AUG 3 2010
...STRONG THUNDERSTORMS WILL AFFECT EASTERN LEE...KENDALL...LA
SALLE...NORTHWESTERN GRUNDY...NORTHWESTERN LIVINGSTON...SOUTHEASTERN
OGLE...SOUTHERN DEKALB AND SOUTHWESTERN KANE COUNTIES...
AT 415 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM ROCHELLE
TO 19 MILES WEST OF PEORIA...MOVING SOUTHEAST AT 45 MPH.
VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER
TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL
STREAMS. WIND GUSTS TO 40 TO 50 MPH WILL ALSO BE
POSSIBLE...ESPECIALLY ACROSS PORTIONS OF LA SALLE AND LIVINGSTON
COUNTIES.
THESE STORMS WILL BE NEAR CRESTON...WEST BROOKLYN...STEWARD...AND
COMPTON AROUND 425 AM...MENDOTA...AND LEE AROUND 430 AM...TROY
GROVE...SHABBONA...AND PAW PAW AROUND 435 AM AND WATERMAN AROUND 440
AM.
LAT...LON 4204 8913 4169 8830 4075 8880 4076 8894
4092 8894 4093 8906 4110 8907 4111 8917
4158 8918 4159 8946
MARSILIThe Chicago radar (KLOT), 30 km away, was scanning. The volume nearest the first event began at 10:02 UTC.
6 flash flood. Local standard time, as filed.
Three to four feet of water was reported under a viaduct near Archer Avenue and 63rd Street.
Significant and widespread flooding occurred across north central Will County during the morning hours of August 3rd. Numerous roads were flooded and closed. Route 53 at Murphy had 6 to 8 inches of rapidly moving flood water; several cars were stuck in flood waters at Theodore and Larkin, which was impassible; five cars were stalled in flood waters on Route 53 north of Romeo Road; Route 30 was flooded and closed between Cherry Hill and Briggs Street; Interstate 80 was flooded and closed in both directions at Briggs Street and Cherry Hill; Route 53 near Lewis Unversity was flooded and closed; numerous streets in Crest Hill were flooded, including Larkin Avenue, Route 53, Gaylord and Theodore; and the Route 53 Alcan overpass. Flooding was also reported on Hammes, Oneida and Madison Streets near St. Joesph Hospital in Joliet. The Dupage River flooded parts of Caton Farm and Lily Cache Roads. Numerous basements were also flooded. Storm total rainfall amounts included 4.44 inches in Joliet; 3.92 inches near Larkin and Theodore in Joliet; 3.09 inches in Crest Hill; 2.78 inches two miles southeast of New Lenox and 2.78 inches at the National Weather Service office in Romeoville.
Street flooding was reported across parts of northeast Will County during the morning hours of August 3rd. Storm total rainfall amounts included 3.54 inches five miles east northeast of Manhattan and 2.92 inches three miles east of Crete.
Flooding of low lying areas and some streets was reported across southern Kane County. Signficant flooding occurred in the Ogden Gardens neighborhood on Aurora's East side, on Parkside Avenue north of East New York Street. Sandbags were placed around at least one house and several houses suffered basement flooding. Storm total rainfall of 2.98 inches was measured in Aurora.
Several roads were closed due to flooding across southern Cook County. In Chicago Heights, 202nd Street was flooded and closed from Wood Street to Ashland Avenue. Tinley Park reported 19 locations with high standing water in the streets. In Midlothian, a church suffered flooding on the first floor; several streets were flooded and standing water in some areas was estimated to be 4 feet deep. Basement flooding was also reported in some areas. Storm total rainfall amounts included 4.10 inches in Oak Forest, 2.50 inches four miles southeast of Matteson and 1.44 inches five miles east southeast of Chicago Heights.
Several roads were flooded across parts of Kendall County including Route 52 and Grove Road; County Line Road at Caton Farm Road; Ridge Road and Caton Farm Road; on Morgan Drive in Oswego; and at Schlapp and Cherry Roads. Storm total rainfall amounts included 3.39 inches one mile southwest of Oswego and 3.04 inches in Yorkville.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2010Every state in 2010This day in weather historyWarnings in Illinois, August 2010
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: 258605, 258600, 258601, 258604, 258602, 258603.