Severe thunderstorms moved across far northern Illinois during the afternoon of June 16th.
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.
Severe thunderstorms moved across far northern Illinois during the afternoon of June 16th.
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 16, 2:15 PM CST, 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 315 PM CDT SAT JUN 16 2007 .DISCUSSION FOR AFTERNOON ZONES/GRIDS... SHORT WAVE DRIVING ACRS WI TODAY HAS SPAWNED CONSIDERABLE CONVECTION THERE AND HAS PRODUCED A COUPLE OF OUTFLOWS DIVING SE THRU IA AND NRN IL. TSTMS DEVELOPING ALONG THE MAIN OUTFLOW BNDRY HEADING INTO N CNTL IL. ISOLATED SHOWERS SPROUTING ELSEWHERE IN NRN IL INCLUDING CHI AREA RESULTING IN SPRINKLES TO SMALL TSTMS PULSING UP AND DOWN. THESE IN TURN RESULTING IN ADDITIONAL OUTFLOW BOUNDARIES. LOCAL CHI REPORT FROM WGN OF GUST TO 42 KTS WHILE RADAR INDICATING OUTFLOWS OF 25 KTS IN CHI AREA...SO NOTHING DAMAGING EITHER WAY...BUT OUTFLOWS ARE INTERACTING WITH LAKE BREEZE THAT STRETCHES FROM HIGHLAND PARK THRU MIDWAY CURLING THRU CALUMET CITY AT 315 PM. THOSE STORMS WEST OF I-35 SHOWING OUTFLOWS TO 42 KTS...SO A BIT STRONGER BUT NOT CATEGORIZED AS DAMAGING YET. THESE NEW OUTFLOWS LIKELY TO KEEP THREAT ALIVE FOR MORE ACTIVITY THIS AFTN AND EVENING. WILL ALSO BE NECESSARY TO PUT IN 30% POPS FOR TNGT AS COLD FNT DROPS DOWN INTO NRN IL...MAINTAINING 1000+ CAPES OVER NRN IL THRU THE NIGHT. AMOUNT OF AVBL MSTR NOW A MOOT POINT SINCE PCPN ALREADY PRESENT AND ACTIVE. SHORT WAVE MOVING BACK NORTH ON SUNDAY WITH MID LVL WARMING RETURNING SOME INHIBITION TO AREA. WILL LEAVE PCPN THREAT OUT SUNDAY THRU EARLY MONDAY...BUT RETURN IT AGAIN LT MONDAY THRU MON NGT AS SYSTEM IN PLAINS ENHANCES SW FLOW AND ADVECTS MORE ORGANIZED CONVECTION ACRS THE MS RVR. ASSOCIATED COLD FNT PASSING THRU TUE MRNG SHUD END PCPN CHANCES AND ADVECT ENUF CAA TO COOL REST OF MAX TEMPS FOR THE WEEK INTO 80S. WILL RETURN TO HIGHS AROUND 90 SUN AND MON. A SECOND COLD FNT DIVING DOWN THRU THE UPR MS VLY WED NGT INTO THURS SHUD RESULT IN A SECOND SHOT OF CAA TO KEEP COOL TEMPS FROM WARMING BACK UP. HAVE INSERTED A CHC POP WED NGT FOR AREA IN ASSOC WITH THIS FROPA. RLB && .AVIATION DISCUSSION FOR 18Z TAFS... 100 PM CDT MAIN AVIATION CONCERN WILL BE POTENTIAL FOR PRECIPITATION FROM LATE THIS AFTERNOON THROUGH THIS EVENING...AND POTENTIAL FOR MVFR VSBYS EARLY SUNDAY. WIND SHIFT LINE NOTED IN MKX WSR 88-D LATE THIS MORNING IS CURRENTLY PASSING ACROSS NORTHEAST ILLINOIS...AND HAS SHIFTED WINDS TO NORTHWEST AT DPA-PWK. THIS BOUNDARY IS LIKELY A RESULT OF SYNOPTIC TROUGH MOVING ACROSS THE AREA PERHAPS SHARPENED A BIT BY OUTFLOW FROM WESTERN WISCONSIN CONVECTION FROM EARLY THIS MORNING. MAIN OUTFLOW BOUNDARY REMAINS DRAPED FROM WEST CENTRAL IOWA INTO EXTREME NORTHWEST ILLINOIS. THIS OUTFLOW BOUNDARY HAS SLOWED ITS SOUTHWARD PROGRESS OVER THE PAST FEW HOURS. SHOWERS AND ISOLD STORMS HAVE DEVELOPED ALONG THIS OUTFLOW BOUNDARY TO OVER PAST HOUR AND IF GIVEN PROXIMITY OF THIS BOUNDARY...RFD WOULD MOST LIKELY BE THE AFFECTED TERMINAL IF THESE SHOWERS AFFECT NORTH CENTRAL ILLINOIS. ACARS SOUNDINGS INDICATING NO CONVECTIVE INHIBITION TO SFC BASED CONVECTION GIVEN CURRENT SFC CONDITIONS WITH SB CAPES ON THE ORDER OF 1000 J/KG. A CONVECTIVELY ENHANCED VORT MAX IS ALSO TRACKING INTO SOUTHERN WISCONSIN/NORTHERN ILLINOIS. HOWEVER...MAIN FORCING WITH THIS WAVE MAY STAY JUST TO THE NORTH ACROSS SOUTHERN WISCONSIN. COMBINATION OF INSTABILITY AND WEAK FORCING SHOULD RESULT IN ISOLD-SCT CONVECTION THIS AFTERNOON...MAINLY NORTH OF INTERSTATE 80. GIVEN EXPECTED LIMITED COVERAGE WILL HOLD OFF ON ACTUAL TS MENTION IN TAFS FOR NOW BUT WILL HAVE TO MONITOR RADAR TRENDS THROUGH THE AFTERNOON. BRIEF PERIOD OF NORTHWEST WINDS ARE EXPECTED AT ORD/DPA WITH PASSAGE OF THE AFOREMENTIONED TROUGH...BUT EXPECTING WINDS TO SHIFT BACK TO WEST AGAIN THIS AFTERNOON WITH SPEEDS AROUND 10 KNOTS. FOR TONIGHT...MAIN CONCERN WILL BE ON POTENTIAL FOR FOG GIVEN A LITTLE BETTER MOISTURE POOLED ALONG WEAKENING COLD FRONT. EXTENT OF FOG WILL DEPEND ON EXTENT OF MID LEVEL CLOUDINESS...AND AT THIS TIME HAVE INCLUDED MENTION OF MVFR VSBYS ACROSS THE TERMINALS IN THE 10Z-14Z TIME FRAME. THIS FRONT WILL LIFT BACK NORTHWARD TOMORROW WITH WIND SPEEDS INCREASING FROM THE SOUTH IN THE AFTERNOON. MARSILI && .MARINE... 220 PM CDT A WEAK SURFACE TROUGH ENHANCED BY OUTFLOW BOUNDARIES FROM EARLY MORNING CONVECTION WILL GRADUALLY WASH OUT ACROSS NORTHERN ILLINOIS SOUTHERN LAKE MICHIGAN TONIGHT. A SURFACE RIDGE AXIS BUILDING IN BEHIND THIS FRONT WILL RESULT IN WEAK WINDS ACROSS LAKE MICHIGAN TONIGHT. THIS RIDGE AXIS WILL PUSH OFF TO THE EAST LATE TONIGHT INTO SUNDAY ALLOWING FOR THIS FRONTAL BOUNDARY TO RETURN NORTHWARD AS A WARM FRONT ON SUNDAY. THIS WILL RESULT IN SOUTH WINDS ACROSS LAKE MICHIGAN...AND INCREASING INTO THE 15 TO 25 KNOT RANGE BY MONDAY MORNING AS SFC PRESSURE GRADIENT TIGHTENS IN RESPONSE TO STRENGTHENING SURFACE LOW TRACKING INTO SOUTH CENTRAL CANADA. THIS LOW PRESSURE AREA WILL TRACK INTO NORTHERN QUEBEC BY TUESDAY MORNING. A COLD FRONT EXTENDING SOUTHWESTWARD FROM THIS LOW WILL TRACK ACROSS LAKE MICHIGAN MONDAY NIGHT INTO EARLY TUESDAY MORNING. MARSILI && .LOT WATCHES/WARNINGS/ADVISORIES... .IL...NONE. .IN...NONE. .LM...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 400 PM CDT SAT JUN 16 2007 ILZ003>006-008-010>014-019>022-023-032-033-039-INZ001-002-010-011- 019-170930- 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 SAT JUN 16 2007 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST ILLINOIS...AND NORTHWEST INDIANA. .DAY ONE... TONIGHT SCATTERED THUNDERSTORMS WILL BE POSSIBLE THROUGH LATE EVENING. NO ORGANIZED SEVERE WEATHER IS EXPECTED. ISOLATED WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THE STRONGEST STORMS. .DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY AN AIR POLLUTION ACTION DAY HAS BEEN DECLARED FOR SUNDAY DUE TO ELEVATED POLLUTION LEVELS. GO TO WWW.EPA.STATE.IL.US OR WWW.IN.GOV/IDEM FOR ADDITIONAL AIR QUALITY INFORMATION. THERE IS A CHANCE OF THUNDERSTORMS MONDAY AFTERNOON THROUGH TUESDAY NIGHT. AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE MONDAY NIGHT...ESPECIALLY TOWARD THE WISCONSIN BORDER. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF STRONG WINDS WOULD BE APPRECIATED TONIGHT. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE) LMZ740>745-766-170930- WINTHROP HARBOR IL TO MICHIGAN CITY IN- LAKE MICHIGAN- 400 PM CDT SAT JUN 16 2007 THIS PORTION OF THE HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA WATERS OF LAKE MICHIGAN. .DAY ONE... TONIGHT ISOLATED THUNDERSTORMS WILL BE POSSIBLE THROUGH LATE EVENING... MAINLY OVER THE NEARSHORE WATERS. NO ORGANIZED SEVERE WEATHER IS EXPECTED...BUT LOCAL WIND GUSTS TO 30 KNOTS ARE POSSIBLE WITH THE STRONGEST STORMS. .DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY THERE IS A CHANCE OF THUNDERSTORMS MONDAY AFTERNOON THROUGH TUESDAY NIGHT. AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE MONDAY NIGHT...ESPECIALLY TOWARD THE WISCONSIN BORDER. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO (LOWER CASE)
The Milwaukee radar (KMKX), 72 km away, was scanning. The volume nearest the first event began at 21:06 UTC.
3 thunderstorm wind, 1 hail. Local standard time, as filed.
Trees and power lines were blown down. Siding blown off a house. A deck was damaged from a grill that was blown over and a hard top cover was blown off a pool.
A tree was blown down blocking a road.
A large tree limb was blown down on Popular Grove Road north of Route 173.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2007Every state in 2007This day in weather historyWarnings in Illinois, June 2007
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: 39019, 39020, 39018, 39021.