Very heavy rain fell across parts of northern Illinois during the early morning hours of June 11th.
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.
Very heavy rain fell across parts of northern Illinois during the early morning hours of June 11th.
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 Jun 11, 5:47 AM CST, 2 hours 8 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 647 AM CDT THU JUN 11 2009 .DISCUSSION... 400 AM... FORECAST CHALLENGES THIS MORNING SIMILAR TO YESTERDAY. THE MAIN SYNOPTIC FEATURE OF INTEREST CONTINUES TO BE THE WAVY QUASI- STATIONARY BOUNDARY EXTENDING FRO. CENTRAL INDIANA TO NORTH CENTRAL OKLAHOMA. AND LIKE LAST NIGHT...THE MODEL GUIDANCE IS OF LITTLE HELP FOR THE SHORT TERM FORECAST PERIOD...FROM ROUGHLY 18Z THURSDAY INTO THE WEEKEND. THE NEAR TERM...THROUGH 18Z TODAY WILL BE AN EXERCISE IN PERSISTENCE AND TIMING THE SHORT WAVES MOVING THROUGH THE REGION THIS MORNING. SATELLITE IMAGERY AND...TO SOME EXTENT...THE HI RES NAM12...SHOW 2 SIGNIFICANT WAVES AFFECTING THE REGION. THE FIRST IS CROSSING OVER CNTRL IL AT ISSUANCE TIME AND HAS LARGELY BEEN RESPONSIBLE FOR TRIGGERING THE OVERNIGHT CONVECTION. OF CONSIDERABLE INTEREST IS THE HEAVY RAINFALL THAT HAS OCCURRED ALONG THE KANKAKEE RIVER VALLEY IN NERN IL/NWRN. RADAR ESTIMATES HAVE INDICATED AREAS OF 3 TO 5 INCH RAINFALL WHERE STRONG CELLS HAVE TRAINED. LATEST RADAR IMAGERY INDICATES AN INTERESTING SCENARIO WITH WEST TO EAST TRAINING OCCURRING ALONG THE I-80/KANKAKEE VALLEY AREA...AND MORE LONGITUDINAL BANDS FURTHER TO THE SOUTH OVER CENTRAL IL/IN. THIS WOULD SUGGEST 2 DIFFERENT PCPN REGIMES OCCURRING SIMULTANEOUSLY AND IN CLOSE PROXIMITY TO EACH OTHER. THUS WILL HAVE TO KEEP LIKELY AND CATEGORICAL POPS GOING THROUGH THE DAY TODAY FOR THE SOUTHERN HALF OF THE CWA. AND...ONCE AGAIN...CANNOT RULE OUT AT LEAST SOME ISOLD SHOWERS OVER NRN SECTIONS AS THE LATEST RADAR TRENDS SHOW SHOW SOME SHOWER TRYING TO DEVELOP NORTH OF I-80...WHICH WILL BE AIDED BY DAYTIME HEATING. GIVEN THE ONGOING MODEL INCONSISTENCY...WILL MAKE LITTLE CHANGE TO THE GOING FORECAST AS THE OVERALL PATTERN SHOULD SHOW LITTLE CHANGE FOR THE NEXT FEW DAYS. WILL KEEP BELOW TEMPERATURES GOING...WITH GENERALLY LOW 70S OVER MUCH OF THE CWA...AND AROUND 60 DEGREES NEAR THE LAKE FRONT. AS THE STRONGEST OF THE SHORT WAVES RIPPLE THROUGH THE FLAT FLOW OVER THE MIDWEST TODAY AND TONIGHT...PERIODS OF SHOWERS AND THUNDERSTORMS SHOULD CONTINUE...PARTICULARLY FOR THE SOUTHERN PORTIONS OF THE CWA. THE SECOND WAVE SHOULD FINALLY PUSH TO THE EAST TOMORROW...ALLOWING THE AREA TO DRY OUT. BUT UNTIL WE CAN GET A PATTERN SHIFT...TEMPERATURES WILL REMAIN ON THE COOLER SIDE. THE ONE AREA OF GUIDANCE CONSISTENCY COMES WITH THE LONGER TERM FORECAST PERIOD. WILL REMAIN CAUTIOUSLY OPTIMISTIC THAT THERE IS INDEED SOME TRUTH TO THE GFS AND ECMWF SOLUTIONS IN THAT THE BOTH STILL WANT TO PUMP UP THE RIDGE OVER THE WRN CONUS IN RESPONSE TO AN UPPER LOW DROPPING SLOWLY DOWN THE WEST COAST. THE UPPER LEVEL FLOW PATTERN IS INDICATING MORE PROGRESSION FOR THE WEEKEND...SO THE WARMING TREND SHOULD BEGIN BY SUNDAY. WITH AN UPPER LEVEL RIDGE IN PLACE FOR SUNDAY AND EARLY NEXT WEEK...THE AREA CAN FINALLY SEE A RETURN TO MORE SEASONABLE TEMPERATURES. KREIN && .AVIATION... 645 AM CDT 1200 UTC TAFS...OVERNIGHT CONVECTION HAS HAS SATURATED LOWER LAYERS AND FORMED LOW MVFR CIGS FOR ORD AND MDW AND GYY. THIS ADVECTING INTO DPA AS WELL. SO FAR RFD UNAFFECTED BY PCPN AND MSTR ACCUMULATING UNDER THE INVERSION ENHANCED BY CONTD NE FLOW. STILL LOOKING FOR WAVE TO BE PAST NRN IL IN THE AFTN AND HIGH PRESSURE BUILDING IN...SO STILL TAKING IT VFR AROUND NOONTIME AND CLEARING OUT AFT 00Z THIS EVENING. WINDS REMAIN NE THRU THURS NGT. RLB && .MARINE... 635 AM CDT THE COMBINATION OF SURFACE HIGH ACROSS THE WESTERN GREAT LAKES AND ANOTHER SURFACE WAVE RIDING ALONG THE FRONT STALLED TO THE SOUTH OF LAKE MICHIGAN WILL RESULT IN CONTINUED NORTHEAST WINDS THROUGH FRIDAY. THIS SURFACE WAVE WILL MOVE INTO THE OHIO RIVER VALLEY FRIDAY...AS THE HIGH PRESSURE SYSTEM TO THE NORTH CONTINUES TO SETTLE SOUTHWARD ACROSS THE WESTERN GREAT LAKES. AS THIS HIGH DRIFTS OVER LAKE MICHIGAN...NORTHEAST WINDS 10 TO 15 KNOTS WILL DIMINISH IN SPEED ON SATURDAY AND BECOME SOUTH SATURDAY AFTERNOON/EVENING AS AN AREA OF LOW PRESSURE MOVES ACROSS ONTARIO. THE LOW PRESSURE AREA WILL MOVE INTO WESTERN QUEBEC BY MONDAY MORNING AS A REINFORCING RIDGE OF HIGH PRESSURE BUILDS INTO THE REGION. A RELATIVELY WEAK GRADIENT WILL BE MAINTAINED THROUGH THE PERIOD...AND DO NOT FORESEE ANY POTENTIAL FOR MARINE HEADLINES THROUGH THE WEEKEND. RLB && .LOT WATCHES/WARNINGS/ADVISORIES... IL...NONE. IN...NONE. LM...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 444 AM CDT THU JUN 11 2009 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 120945- 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- 444 AM CDT THU JUN 11 2009 /544 AM EDT THU JUN 11 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TODAY AND TONIGHT. WIDESPREAD SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER LOCATIONS SOUTH OF INTERSTATE 80 THROUGH EARLY AFTERNOON. THESE STORMS WILL BE ACCOMPANIED BY HEAVY DOWNPOURS. REPEATED STORM DEVELOPMENT OVER THE SAME AREA WILL LEAD TO FLOODING AND FLASH FLOODING. HEAVY RAINFALL ON THE ORDER OF 3 TO 5 INCHES HAS ALREADY FALLEN OVER PORTIONS OF NORTHERN KANKAKEE IN ILLINOIS...AND LAKE AND PORTER COUNTIES IN NORTHWEST INDIANA. ADDITIONAL HEAVY RAINFALL OF 2 TO 3 INCHES IS POSSIBLE TODAY ALONG INTERSTATE 80 IN ILLINOIS AND ALONG THE KANKAKEE RIVER VALLEY IN NORTHWEST INDIANA. SCATTERED THUNDERSTORMS ARE POSSIBLE OVER PORTIONS OF NORTHERN ILLINOIS NORTH OF INTERSTATE 80 THROUGH EARLY THIS AFTERNOON AS WELL. THERE IS AN INCREASED RISK OF RIP CURRENTS THIS AFTERNOON AND EVENING ALONG THE INDIANA SHORELINE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE IS A CHANCE OF THUNDERSTORMS SATURDAY NIGHT AND SUNDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NECESSARY TODAY...PARTICULARLY FOR FLASH FLOOD RELATED INCIDENTS. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-120945- 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- 444 AM CDT THU JUN 11 2009 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. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. && 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- 870-872-874-876-878-120945- 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 TOW 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- 444 AM CDT THU JUN 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO KREIN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
604 AM CDT THU JUN 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0601 AM HEAVY RAIN PEOTONE 41.33N 87.80W
06/11/2009 M1.34 INCH WILL IL TRAINED SPOTTER
1.34 INCHES OF RAIN OVER THE LAST 3 HOURS.
&&
BOXELLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
730 AM CDT THU JUN 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0727 AM HEAVY RAIN 5 NNE VALPARAISO 41.54N 87.01W
06/11/2009 M5.56 INCH PORTER IN CO-OP OBSERVER
AMOUNT OF RAIN SINCE MIDNIGHT.
0727 AM HEAVY RAIN MARSEILLES 41.33N 88.69W
06/11/2009 M2.25 INCH LA SALLE IL CO-OP OBSERVER
24 HOUR RAINFALL.
0727 AM HEAVY RAIN ST. ANNE 41.02N 87.72W
06/11/2009 M2.14 INCH KANKAKEE IL CO-OP OBSERVER
24 HOUR RAINFALL.
&&
BOXELLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
802 AM CDT THU JUN 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0743 AM HEAVY RAIN MOMENCE 41.16N 87.66W
06/11/2009 M2.32 INCH KANKAKEE IL CO-OP OBSERVER
24 HOUR RAINFALL
0743 AM HEAVY RAIN CROWN POINT 41.42N 87.36W
06/11/2009 M3.04 INCH LAKE IN CO-OP OBSERVER
24 HOUR RAINFALL
0743 AM HEAVY RAIN VALPARAISO 41.48N 87.05W
06/11/2009 M1.07 INCH PORTER IN CO-OP OBSERVER
24 HOUR TOTAL.
0743 AM HEAVY RAIN 4 NNW VALPARAISO 41.53N 87.08W
06/11/2009 M6.17 INCH PORTER IN PUBLIC
24 RAINFALL FROM COCORAHS REPORT.
0752 AM HEAVY RAIN PERU 41.34N 89.13W
06/11/2009 M2.27 INCH LA SALLE IL CO-OP OBSERVER
24 HOUR RAINFALL
0752 AM HEAVY RAIN RENSSELAER 40.94N 87.15W
06/11/2009 M1.04 INCH JASPER IN CO-OP OBSERVER
24 HOUR RAINFALL
0752 AM FLOOD PORTAGE 41.59N 87.18W
06/11/2009 PORTER IN EMERGENCY MNGR
FLOODING IN A TRAILER PARK NEAR US 6 AND IN 149 IN
PORTAGE.
&&
BOXELLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
816 AM CDT THU JUN 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY RAIN 3 SW MIDWAY AIRPORT 41.75N 87.79W
06/11/2009 M1.14 INCH COOK IL CO-OP OBSERVER
RAINFALL FROM 715 AM TO 800 AM.
&&
NMARSILIPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
844 AM CDT THU JUN 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0841 AM FLASH FLOOD 4 NNW VALPARAISO 41.53N 87.08W
06/11/2009 PORTER IN EMERGENCY MNGR
WATER COVERING THE ROADS NEAR THE INTERSECTION OF US 6
AND IN 149. ALSO FLOODING IN A TRAILER PARK NEAR THIS
INTERSECTION.
0841 AM FLOOD 3 NNW VALPARAISO 41.52N 87.07W
06/11/2009 PORTER IN EMERGENCY MNGR
MUDSLIDE COVERING COUNTY ROAD 600N JUST EAST OF MERIDIAN
ST NEAR ROGERS LAKEWOOD PARK.
&&
BOXELLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
855 AM CDT THU JUN 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0805 AM HEAVY RAIN PEOTONE 41.33N 87.80W
06/11/2009 M1.81 INCH WILL IL TRAINED SPOTTER
STORM TOTAL RAINFALL. STILL RAINING.
&&
NMARSILIThe national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Minor flooding was reported in fields. Storm total rainfall amounts included 2.32 inches in Momence and 2.14 inches in St. Anne.
Eighteen inches of standing water was reported in a parking lot along Ingleside Avenue. Storm total rainfall amounts included 2.40 inches in Oak Lawn and 1.60 inches near Midway Airport.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2009Every state in 2009This day in weather historyWarnings in Illinois, June 2009
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: 174597, 174596.