Tornadoes and Flash Flood in Illinois, June 5 to 6, 2010

Name: Tornadoes and Flash Flood in Illinois, June 5 to 6, 2010
Start: 2010-06-05T19:28
End: 2010-06-06T00:45
Location: Illinois

June 5 to 6, 2010 · NWS LOT · 15 events in 4 counties and zones

Severe thunderstorms including a few long tracked supercells moved across central and northern Illinois, producing damaging winds, hail and tornadoes.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 1
Injuries: 31
Property damage: $12 million
Crop damage: None recorded
Events: 15

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.

What happened

The episode as NWS LOT wrote it up.

Severe thunderstorms including a few long tracked supercells moved across central and northern Illinois, producing damaging winds, hail and tornadoes.

What forecasters said that day

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 5, 6:40 PM CST, 48 minutes earlier.

Area forecast discussion, Jun 5, 6:40 PM CST, 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
740 PM CDT SAT JUN 5 2010

.MESOSCALE DISCUSSION...
508 PM CDT

POTENTIALLY INTERESTING CONVECTIVE SCENARIO SET TO UNFOLD THIS
EVENING.

CONVECTION IS GRADUALLY INTENSIFYING OVER CENTRAL IA VICINITY OF
EASTWARD MOVING COLD FRONT AND OVER NORTHEAST IOWA NEAR WARM FRONT
THAT EXTENDS EASTWARD INTO SOUTHERN WISCONSIN. DESPITE THE STRONG
INSTABILITY AND STRONG DEEP LAYER SHEAR THE STORMS HAVE YET TO
REALLY TAKE OFF...WHICH IS PROBABLY PARTIALLY A RESULT OF THE VERY
POOR LAPSE RATES ALOFT WHICH WERE SAMPLED BY BOTH THE KDVN AND
KOAX 18Z SOUNDINGS. FAIRLY STRONG UPPER FORCING IS IN PLACE WITH
130 300MB JET NOSING EASTWARD INTO THE UPPER MISSISSIPPI VALLEY
WITH IMPRESSIVE UPPER LEVEL DIVEREGENCE/DIFLUENCE SO WOULD
ANTICIPATE CONVECTION TO CONTINUE TO SLOWLY INCREASE IN COVERAGE
AND INTENSITY ACROSS IOWA EARLY THIS EVENING.

IN ADDITION TO THE POOR LAPSE RATES...SOUNDINGS ARE VERY MOIST
THROUGH A DEEP LAYER PROVIDING FOR WEAK DCAPE VALUES AND NOT A
PARTICULARLY FAVORABLE ENVIRONMENT FOR THE DEVELOPMENT OF A
SIGNIFICANT COLD POOL. THIS CERTAINLY ADDS SOME UNCERTAINTY
REGARDING WHAT THE FUTURE HOLDS FOR THIS CONVECTION AS IT MOVES
INTO NORTHERN ILLINOIS LATER THIS EVENING. AIRMASS DOWNSTREAM
ACROSS NORTHERN ILLINOIS IS NOT AS UNSTABLE AS IT IS OVER IOWA
WHERE STORMS ARE CURRENTLY STRUGGLING A BIT TO TAKE OFF.

SHOULD STORM ORGANIZATION INCREASE IN THE NEXT COUPLE OF HOURS
OVER IOWA...CONDITIONS WOULD PROBABLY BE SUPPORTIVE OF THIS
CONVECTION GENERALLY MAINTAINING ITS INTENSITY ACROSS NORTHERN
ILLINOIS LATER EVENING GIVEN THE VERY STRONG DEEP LAYER SHEAR AND
MODEST INSTABILITY. CERTAINLY NOT READY TO TOTALLY GIVE UP ON
SEVERE WEATHER CHANCES THIS EVENING GIVEN THE FAIRLY IMPRESSIVE
SHORTWAVE...STRONG SHEAR AND MODEST INSTABILITY...HOWEVER SEVERAL
MITIGATING FACTORS DO RAISE SOME DOUBTS AS TO HOW WIDESPREAD OR
SIGNIFICANT OF A SEVERE EVENT IT WILL BE IN OUR CWA THIS EVENING.
WILL CONTINUE TO MONITOR CONVECTIVE TRENDS THE NEXT COUPLE HOURS
AND HOPEFULLY MOTHER NATURE WILL BEGIN TO TIP HER HAND AS TO HOW
THINGS WILL UNFOLD THIS EVENING.

IZZI

&&

.DISCUSSION...
348 PM CDT

SHORT TERM FOCUS IS ON REDEVELOPMENT OF ANOTHER ROUND OR TWO OF
SHOWERS AND THUNDERSTORMS...AND THEIR POTENTIAL FOR HEAVY
RAINFALL...FOR LATE AFTERNOON AND TONIGHT AS THE NEXT COUPLE OF
SHORT WAVES APPROACH AND MOVE ACROSS THE LOCAL AREA IN FAST ZONAL
FLOW STRETCHING FROM THE PAC NW ACROSS THE NORTHERN PLAINS...UPPER
MIDWEST...GREAT LAKES AND NEW ENGLAND TO THE GULF OF ST. LAWRENCE.

HIGH MOISTURE CONTENT AIR MASS IN PLACE ACROSS THE REGION S OF
SURFACE BOUNDARY ACROSS LOWER MI...FAR SOUTHERN WI AND FAR
NORTHERN IA. SURFACE DEW POINTS IN THE UPPER 60S AND LOWER 70S
WITH MODEL FORECAST PRECIPITABLE WATER VALUES OF 2-2.25 INCHES
CONFIRMED BY SATELLITE SOUNDER DERIVED VALUES.

THE FIRST SHORT WAVE...AT 700 HPA...IS CURRENTLY MOVING ESE
ACROSS MN AND NORTHERN IA AND HAS INITIATED A SMALL CLUSTER OF
THUNDERSTORMS IN NW IA. THIS IS WHERE SIGNIFICANT LOW LEVEL
CONVERGENCE HAS BEEN OCCURRING JUST AHEAD OF A WEAK WAVE ON THE
SURFACE BOUNDARY AND CLR TO SCT SKY COVER HAS ALLOWED SURFACE
HEATING AND DESTABILIZATION. THESE STORMS ARE AT NORTH END OF
BROAD AREA FEED OF HIGH THETA E AIR WHERE SFC BASED CAPES ARE NOW
UP TO 4500 J/KG AND MU CAPES UP TO 5500 J/KG.

WITH BKN TO OVC CLOUDS ALL DAY ACROSS FAR NORTHERN IL NOT NEARLY
AS UNSTABLE BUT STILL PLENTY OF CAPE...FURTHER S ACROSS SOUTHERN
PORTION OF THE FA AND DOWN INTO CENTRAL IL E INTO FAR W CENTRAL
IND BREAK IN CLOUDS AND WIDESPREAD DEW POINTS IN THE LOWER 70S
HAS RESULTED IN CAPE VALUES OF +3000.

EXPECT CONTINUED EXPANSION OF TSRA ACROSS IA AND INTO NORTHERN IL
AS HEATING/DESTABILIZATION CONTINUES FOR A FEW MORE HOURS AND THE
THE OTHER UPSTREAM SHORT WAVE...AT 500 HPA AND CURRENTLY OVER THE
DAKOTAS GENERATING TSRA...CATCHES UP TO THE FIRST ONE LATE TONIGHT
AS THEY SLIDE ACROSS WI AND NORTHERN IL THIS EVE.

SHEAR AS OBSERVED AND FORECAST MARGINAL AS FAR AS DEEP
DIRECTIONAL...BUT GOOD SPEED SHEAR AS A 50-75KT MID LEVEL SPEED
MAX PER PROFILER AND 88D MEASURED WINDS PROGRESSES E FROM EASTERN
NEB AND WESTERN IA. LARGE CAPE VALUES DUE TO THIN BUT VERY DEEP
POSITIVE AREA DUE TO LOW CCL. WITH FREEZING LEVEL UP AROUND 15K
FT MAIN SEVERE WEATHER THREAT EXPECTED TO BE STRONG DAMAGING
WINDS...ALONG WITH FLASH FLOODING FROM VERY HEAVY DOWNPOURS.

IN LONGER TERM...MODELS DEPICT A WEAK IMPULSE DROPPING SE ACROSS
THE UPPER MIDWEST TOWARD NORTHERN IL SUNDAY IN THE BUCKLING UPPER
FLOW. MODELS GENERATE SOME LIGHT QPF SO WILL CARY A CHC OF SHRA
AND TSRA AS COOLED MID LEVELS WILL PROMOTE LOWER TOPPED CONVECTION.

DRY AND SLIGHTLY BELOW NORMAL TEMPS SUN NIGHT AND MON WITH RIDGING
SURFACE AND ALOFT BEFORE THREAT OF SHOWERS AND THUNDERSHOWERS
RETURNS FOR MON NIGHT AS WAA AND MOISTURE SPREADS NNE ACROSS THE
UPPER AND MID MS VALLEY INTO THE UPPER MIDWEST. CONTINUED CHANCES
TUE AND TUE NIGHT AS LOW PRES TRACKS ACROSS CENTRAL IL.

ANOTHER BREAK IN RAIN THREAT WED-THU BEFORE SLOWLY EASTWARD
PROGRESSING UPPER LOW MOVES OUT OF THE ROCKIES AND ACROSS THE NRN
PLAINS WITH ANOTHER THREAT OF SHRA AND TS FRI-SAT.

TRS

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 00Z...

MAIN CONCERNS FOR THE TERMINALS ARE IN THE NEAR TERM WITH
THUNDERSTORM POTENTIAL. SHOWERS AND THUNDERSTORMS CONTINUE TO
DEVELOP ACROSS WESTERN ILLINOIS THIS EVENING...AND EXPECT THIS
ACTIVITY TO MOVE EAST LATER THIS EVENING. BEFORE THIS SYSTEM EXITS
TO THE EAST SUNDAY MORNING...VFR CONDITIONS WILL BE REPLACED WITH
MVFR AND POSSIBLY IFR CONDITIONS.

WINDS WILL REMAIN OUT OF THE SOUTHWEST THIS EVENING UNTIL THEY
TURN TO THE NORTHWEST WITH THE PASSAGE OF A COLD FRONT. WITH THIS
WIND SHIFT...WINDS WILL ALSO BE INCREASING WITH SOME GUSTS
POSSIBLE DURING THIS TIME FRAME.

RODRIGUEZ

//DISCUSSION...UPDATED 00Z...

AREA OF LOW PRESSURE WITH ASSOCIATED FRONTAL BOUNDARY CURRENTLY
SITUATED OVER NORTHERN ILLINOIS HAS ALLOWED SOUTHWEST WINDS TO
REMAIN IN AND AROUND THE TERMINALS. THIS FLOW HAS ONCE AGAIN
PROVIDED AN UNSTABLE ATMOSPHERE TODAY WITH A CONTINUED STREAM OF
WARM MOIST AIR. WITH THE PROGRESSION OF THIS SYSTEM TO THE EAST
THIS EVENING...THIS FRONT WILL PUSH THROUGH THIS UNSTABLE
ATMOSPHERE AND HELP PROVIDE AN INCREASE POSSIBILITY FOR
THUNDERSTORM ACTIVITY TONIGHT. SHOWERS WITH SOME EMBEDDED THUNDER
HAVE BEEN OBSERVED OVER THE LAST SEVERAL HOURS...BUT WITH MANY OF
THEM STRUGGLING TO BECOME FULLY DEVELOPED. AM ANTICIPATING
COVERAGE OF THESE SHOWERS AND THUNDERSTORMS TO CONTINUE TO
INCREASE BEFORE THEY DIMINISH AROUND THE 06Z TIME FRAME AS FRONT
PUSHES THROUGH AND DRIER AIR MOVES IN FROM BEHIND. RAIN WILL BE
POSSIBLE ON THE BACKSIDE OF THIS SYSTEM FOR A BRIEF PERIOD...WITH
LOWER CEILINGS ALSO POSSIBLE. HAVE GONE WITH LOW END MVFR FOR LATE
TONIGHT EARLY SUNDAY...WITH THE POSSIBILITY OF IFR BRIEFLY BEFORE
ENTIRE SYSTEM SHIFTS TO THE EAST.

WINDS WILL REMAIN OUT OF THE SOUTHWEST TONIGHT BEFORE SHIFTING TO
THE NORTHWEST AS FRONT PASSES AROUND 06Z.

RODRIGUEZ

//ORD AND MDW CONFIDENCE...UPDATED 00Z...

HIGH CONFIDENCE WITH SHOWER AND THUNDERSTORM ACTIVITY TONIGHT.
HIGH CONFIDENCE WITH WIND DIRECTION WITH LOW CONFIDENCE ON WIND
SPEED AND GUSTS.
LOW CONFIDENCE ON POSSIBILITY OF IFR CONDITIONS TONIGHT/EARLY
SUNDAY MORNING.

RODRIGUEZ

//OUTLOOK FOR ORD/MDW FOR 06Z MONDAY-12Z FRIDAY...UPDATED 00Z...
...UPDATED 18Z...

SUNDAY NIGHT...WX NIL.  CIGS LIFTING TO VFR.

MONDAY...VFR.

TUESDAY...CHC OF TSRA.  CIGS/VIS LOCALLY MVFR.

WEDNESDAY...VFR.

THURSDAY...VFR.

FRIDAY...CHC OF TSRA.  OTRW VFR.

MERZLOCK

&&

.MARINE...
137 PM CDT

A WEAK AND DIFFUSE FRONTAL TROUGH WILL REMAIN DRAPED ACROSS THE
CENTRAL PORTION OF LAKE MICHIGAN AS A LOW PRESSURE CENTER OVER
EXTREME NORTHERN IOWA MOVES TO SOUTHEAST WISCONSIN BY THIS
EVENING. THIS LOW AND FRONTAL BOUNDARY WILL BE THE FOCUS FOR
STRONG TO SEVERE THUNDERSTORM DEVELOPMENT...MAINLY OVER THE SOUTH
END OF THE LAKE THIS EVENING.

THE LOW IS THEN FORECAST TO DEEPEN AS IT MOVES ACROSS SOUTHERN
LAKE MI AND ON TO NEAR DETROIT BY LATE TONIGHT. AS THIS SYSTEM
DEEPENS...NORTHWEST TO NORTH WINDS MAY REACH AS HIGH AS 25 KNOTS
LATE TONIGHT AND SUNDAY.

IN THE WAKE OF THIS SYSTEM...A HIGH PRESSURE WILL SETTLE ACROSS
THE PLAINS AND UPPER MISSISSIPPI VALLEY BY SUNDAY NIGHT. THIS HIGH
WILL DRIFT SLOWLY EAST ACROSS THE LAKE MONDAY BEFORE YET ANOTHER
LOW HEADS TOWARD THE WESTERN GREAT LAKES ON TUESDAY.

MERZLOCK

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...FLASH FLOOD WATCH...ILZ003-ILZ004-ILZ005-ILZ006-ILZ008-ILZ010-
     ILZ011-ILZ012-ILZ013-ILZ014-ILZ019-ILZ020-ILZ021-ILZ022-
     ILZ023-ILZ032-ILZ033-ILZ039 UNTIL 1 AM SUNDAY.

IN...FLASH FLOOD WATCH...INZ001-INZ002-INZ010-INZ011-INZ019 UNTIL 1
     AM SUNDAY.

LM...NONE.
&&

Hazardous weather outlook, Jun 5, 4:02 PM CST, 3 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
502 PM CDT SAT JUN 5 2010

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
062215-
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-
502 PM CDT SAT JUN 5 2010 /602 PM EDT SAT JUN 5 2010/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

  WEATHER HAZARDS EXPECTED:

   NUMEROUS THUNDERSTORMS...SOME MAY PRODUCE:
   DAMAGING HAIL OF ONE INCH DIAMETER OR LARGER.
   DAMAGING WINDS GUSTS IN EXCESS OF 60 MPH.
   ISOLATED TORNADOES.
   HEAVY RAINFALL CAUSING LOCAL FLOODING.
   FREQUENT DANGEROUS CLOUD TO GROUND LIGHTNING.

  AREAS AFFECTED AND TIMING:

   THE MOST NUMEROUS THUNDERSTORMS WILL OCCUR ACROSS FAR
   NORTHERN ILLINOIS EARLY THIS EVENING...GRADUALLY
   SPREAD SOUTH TO I-88 AND I-80 BY MID EVENING...AND
   THEN TO EAST CENTRAL ILLINOIS AND NORTHWEST INDIANA
   BY LATE EVENING. A MODERATE RISK OF SEVERE WEATHER
   EXISTS SOUTH OF I-80 WITH A SLIGHT RISK NORTH.

  DISCUSSION:

   WARM MOISTURE LADEN AND UNSTABLE AIR IS IN PLACE
   ACROSS THE AREA...SOUTH OF A FRONTAL BOUNDARY DRAPED FROM
   SOUTHERN LOWER MICHIGAN WEST ACROSS FAR SOUTH WISCONSIN AND
   THEN SOUTHWEST ACROSS IOWA. AN UPPER DISTURBANCE OVER IOWA
   AND SOUTHERN MINNESOTA LATE THIS AFTERNOON WILL CONTINUE
   SOUTH SOUTHEASTWARD AND MOVE ACROSS NORTHERN ILLINOIS AND
   NORTHWEST INDIANA DURING THE EVENING.

   THUNDERSTORMS IN IOWA ASSOCIATED WITH THIS DISTURBANCE WILL
   MOVE EAST...AND ALSO DEVELOP FURTHER EAST OUT AHEAD OF THE
   DISTURBANCE ACROSS NORTHERN ILLINOIS THIS EVENING.

   AS THE DISTURBANCE MOVES OVER NORTHERN ILLINOIS THIS EVENING
   THE COOL FRONT NORTH OF THE ILLINOIS STATE LINE WILL SAG
   SOUTHEASTWARD INTO NORTHERN ILLINOIS...AND THE THUNDERSTORMS
   WILL SHIFT SOUTH AND SOUTHEAST TO EAST CENTRAL ILLINOIS AND
   NORTHWEST INDIANA BY LATE EVENING. A MID LEVEL SPEED MAX
   ASSOCIATED WITH THIS DISTURBANCE WILL MOVE OVER THE LOCAL AREA
   AND ENHANCE THE POTENTIAL FOR SEVER WEATHER.

   DUE TO THE SIGNIFICANT RAINS OF THE LAST FEW DAYS SATURATING
   MUCH OF THE GROUND ACROSS THE AREA...FLASH FLOODING MAY RESULT
   FROM ANY HEAVY RAIN THAT OCCURS FROM THESE THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE IS A MODERATE THREAT OF RIP CURRENTS ALONG THE INDIANA
SHORES SUNDAY.

THERE ARE CHANCES FOR THUNDERSTORMS SUNDAY AFTERNOON...FROM
MONDAY NIGHT TUESDAY INTO WEDNESDAY...AND FROM THURSDAY NIGHT
THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

REPORTS OF SIGNIFICANT RAINFALL AMOUNTS AND FLOODING ARE
ENCOURAGED.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

LMZ740>745-062215-
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-
502 PM CDT SAT JUN 5 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS AND INDIANA
NEARSHORE WATERS OF LAKE MICHIGAN.

.DAY ONE...TONIGHT.

THERE WILL BE THUNDERSTORMS TONIGHT. SOME MAY BE STRONG TO
SEVERE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE ARE CHANCES FOR THUNDERSTORMS SUNDAY AFTERNOON...FROM
MONDAY NIGHT TUESDAY INTO WEDNESDAY...AND FROM THURSDAY NIGHT
THROUGH SATURDAY.

&&

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-
870-872-874-876-878-062215-
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-
502 PM CDT SAT JUN 5 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

THUNDERSTORMS ARE LIKELY TONIGHT OVER THE SOUTHERN PORTION OF THE
LAKE WITH A CHANCE OF THUNDERSTORMS OVER THE CENTRAL PORTION OF
THE LAKE. THUNDERSTORMS ACROSS SOUTHERN LAKE MICHIGAN MAY BE
STRONG TO SEVERE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE ARE CHANCES OF THUNDERSTORMS FOR TUESDAY AND
WEDNESDAY...AND AGAIN FOR FRIDAY AND SATURDAY.

&&

COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO

The radar

The Chicago radar (KLOT), 105 km away, was scanning. The volume nearest the first event began at 01:28 UTC.

Open the radar archive at this moment

Event by event

12 tornado, 2 thunderstorm wind, 1 flash flood. Local standard time, as filed.

Tornado, La Salle

When: June 5, 7:28 PM CST to 7:30 PM CST
Where: La Salle County, 6 mi WSW of Lostant to 3 mi SSE of Priscilla
Rating: EF0
Path length: 1.3 mi
Path width: 30 yd
Property damage: $5,000
Reported by: NWS Storm Survey
Coordinates: 41.113, -89.162

A NWS survey team found intermittent damage from the Putnam County line to just east of East 1st Road, about one half mile south of Illinois Route 18. The damage consisted primarily of tree and minor structural damage to farm buildings. See Stormdata for Illinois, Northwest for the beginning of this tornado.

Tornado, La Salle

When: June 5, 7:32 PM CST to 7:33 PM CST
Where: La Salle County, 1.9 mi W of Twin Bluffs to 1.69 mi W of Twin Bluffs
Rating: EF0
Path length: 0.21 mi
Path width: 50 yd
Reported by: NWS Storm Survey
Coordinates: 41.327, -88.936

A tornado briefly occurred just west of Ottawa and just north of Starved Rock State Park. A damage survey conducted by the National Weather Service found some minor damage in the area with a couple large trees downed along with several other branches of varying sizes downed.

Tornado, La Salle

When: June 5, 7:35 PM CST to 7:57 PM CST
Where: La Salle County, 2.05 mi NW of East Wenona to 1.81 mi SE of Kernan
Rating: EF2
Path length: 16.81 mi
Path width: 800 yd
Injuries: 17 direct, 0 indirect
Property damage: $7.0 million
Reported by: NWS Storm Survey
Coordinates: 41.105, -89.072

Shortly after the Magnolia, IL tornado lifted, the same supercell thunderstorm went on to produce another tornado near the Marshall and LaSalle County line. National Weather Service damage survey teams found the damage from this tornado began just west of 2900 E Road and about one quarter mile south of 1250 N Road, or N 12th Road, which is the road that marks the county line. The tornado crossed north of 1250 N Road at Interstate 39. See Stormdata for Illinois, Central for the beginning of this tornado.

This tornado continued eastward tracking along and just north of 12th Road, producing primarily EF0 to EF1 intensity damage, largely in the form of downed trees, power lines, and very minor structural damage.

After the tornado moved past E 9th Road, the damage became more sporadic, which corresponded with spotter and storm chasers who reported that the tornado was not continuously on the ground before it reached Streator. Damage became more consistent again as the tornado moved east of E 12th Road, remaining just north of N 12th Road. The tornado appears to have remained on the ground from this point east into the city of Streator. The damage from E 9th Road east to E 15th Road was rated EF0 intensity and consisted primarily of minor tree damage.

The tornado appears to have intensified as it moved into the city of Streator with EF2 intensity damage near the Eagle Pass subdivision where there was significant tree damage, along with portions of roofs removed from well built single family homes. The tornado continued eastward across southern portions of the city of Streator, damaging numerous homes and completely destroying several homes. Some of the most intense damage in Streator occurred along Hall Street and near Southside Athletic Park, where damage was rated higher end EF2. The most intense damage occurred through an approximately one quarter mile wide path through the city of Streator.

Twenty one homes were uninhabitable and had to be destroyed. Another 33 homes were uninhabitable and had to undergo major repair. Another 150 homes had some degree of damage.

A few businesses were also damaged including the Engle Lane Theater, an auto salvage business, an auto repair shop, and a landscape and nursery business.

The tornado then continued eastward out of the city of Streator producing additional EF0 to EF1 intensity damage just north of the Livingston and LaSalle county border. The tornado appears to have jogged slightly southward before lifting near the county line, just to the west of E 22nd Road.

Tornado, La Salle

When: June 5, 7:50 PM CST to 7:51 PM CST
Where: La Salle County, 0.92 mi SSW of Altmar to 0.89 mi S of Altmar
Rating: EF0
Path length: 0.15 mi
Path width: 20 yd
Reported by: Storm Chaser
Coordinates: 41.117, -88.884

Spotters and chasers witnessed a brief secondary tornado near Streator, in a field just south of Illinois Route 18, between County Roads 14 and 15, about 1/2 mile north of the main Streator tornado track. They observed a brief dust whirl on the ground beneath the funnel cloud, but it was over an open field and there was no damage.

Tornado, Livingston

When: June 5, 7:58 PM CST to 8:10 PM CST
Where: Livingston County, 1.03 mi E of Missal to 0.94 mi NNE of Nevada
Rating: EF3
Path length: 8.55 mi
Path width: 440 yd
Property damage: $750,000
Reported by: NWS Storm Survey
Coordinates: 41.100, -88.730

Very quickly after the tornado that hit Streator lifted, yet another tornado touched down over extreme northern Livingston county approximately one quarter mile south of the county line and about a half mile west of 1100 E Road. Shortly after touching down, this tornado caused severe damage to homes on 1100 E Road and destroyed a barn as well. There were also several large trees downed in this location. As the tornado continued eastward, it completely collapsed a metal truss high tension electrical tower and bent over several other metal truss electrical towers in its path, which is consistent with low end EF3 damage. At this time the tornado was moving through an extremely rural area, however there was also a lone hardwood tree in its path that was debarked, with only large de-leafed branches remaining.

The tornado continued eastward crossing Illinois Route 170 just south of the LaSalle and Livingston county line where hardwood trees were snapped. Large trees were broken at a farm house and a machine shed and grain bins were destroyed. The tornado then moved eastward for several more miles downing multiple trees and resulting in some minor structural damage between 1700 E Road and 1800 E Road.

Tornado, Livingston

When: June 5, 8:12 PM CST to 8:25 PM CST
Where: Livingston County, 0.97 mi SSE of Sunbury to 1.29 mi ENE of Dwight
Rating: EF2
Path length: 5.96 mi
Path width: 300 yd
Deaths: 1 direct, 0 indirect
Injuries: 13 direct, 0 indirect
Property damage: $3.0 million
Reported by: NWS Storm Survey
Coordinates: 41.088, -88.521

The beginning of the Dwight tornado occurred about 6 miles west of Dwight and about a quarter mile south of IL Route 17. On N 2200 E Road, 0.3 miles south of IL Route 17, a farm house sustained damage to windows, siding, and shingles, with many trees uprooted or damaged. Outbuildings were also damaged. The tornado at this point was rated EF1, with a path width of 70 yards. Debris from this farm was spread 200 yards wide across the field at N 2300E Road.

The tornado proceeded to strike the golf course at N 2400 E Road, where numerous large trees were snapped and uprooted. Golf cart sheds were unroofed or severely damaged. At this point the tornado was rated low end EF2 with a path width of 300 yards. The tornado then moved east across Interstate 55 and moved into Dwight, damaging a lumber yard and other businesses. At Williams Street and old Route 66 a mobile home park was hit. Fourteen people were injured. One person who was seriously injured, later died. At the mobile home park, 35 mobile homes were destroyed. Damage here was rated EF2. Large trees were uprooted and power poles were snapped at the railroad tracks. At a ball field a little farther east, trees and fences were damaged and an announcer's booth was destroyed. Slightly farther east, there was minor damage to a church, but the church's garage was destroyed. There was damage to the high school auditorium roof and facade, and a greenhouse. A storage garage was destroyed at the high school.

The tornado then continued east into a subdivision between Philmar Street and Prospect Avenue, where many large trees were downed on top of homes. At Sunset Drive and Wilmac Street a garage door and roof were taken off. A roof was taken off a house on Linden Street a half block west of Il Route 47. Three houses were uninhabitable and had to be destroyed. More than 100 homes had some damage. Damage in Dwight was rated high end EF1 to low end EF2. The tornado dissipated in an open field east of Route 47.

Tornado, Livingston

When: June 5, 8:16 PM CST to 8:20 PM CST
Where: Livingston County, 2.02 mi E of Sunbury to 1.57 mi NNW of Dwight
Rating: EF0
Path length: 2.35 mi
Path width: 20 yd
Property damage: $100,000
Reported by: NWS Storm Survey
Coordinates: 41.103, -88.491

A secondary tornado occurred 3 miles northwest of Dwight in northern Livingston County. The tornado began near the intersection of Rd 3300N and 2300E, where it caused minor damage to a home and surrounding trees. The tornado continued to the southeast where it derailed a train off its tracks near 2400E Road. At this point, the tornado moved east causing minor damage to some area trees before crossing Interstate 55, where it then lifted. The tornado was rated EF0 with winds estimated at around 80 mph and a path width of 20 yards.

Thunderstorm Wind, Grundy

When: June 5, 8:20 PM CST to 8:21 PM CST
Where: Grundy County, 0.47 mi NNW of Harrisonville to 0.32 mi NNW of Coal City
Measured: 65 kt (75 mph) estimated gust
Property damage: $50,000
Reported by: Emergency Manager
Coordinates: 41.286, -88.303

There was damage to a set of portable bleachers, two portable toilets, bundles of styrofoam insolation, and four 55 gallon trash cans at the high school on Division Street. The windshield of a vehicle was broken by flying debris. Along Oak Street, from Broadway to the railroad tracks, a construction trailer was destroyed, tree limbs were blown down, a tree was uprooted, and there was minor roof damage to a house and a garage.

Thunderstorm Wind, La Salle

When: June 5, 8:25 PM CST
Where: La Salle County, 0.69 mi N of Peru
Measured: 50 kt (58 mph) measured gust
Reported by: AWOS
Coordinates: 41.340, -89.130

Tornado, Livingston

When: June 5, 8:31 PM CST to 8:38 PM CST
Where: Livingston County, 1.75 mi SW of Blair to 2.27 mi NNE of Cardiff
Rating: EF0
Path length: 3.82 mi
Path width: 20 yd
Property damage: $20,000
Reported by: NWS Storm Survey
Coordinates: 41.082, -88.344

A tornado formed along the north side of 3100 N Road, between 3100 E Road and 3200 E Road, for one quarter of a mile. The tornado was rated EF0 here. There was additional minor damage to tree limbs and a metal farm outbuilding for about half a mile along the north side of 3100 N Road, between 3400 E Road and 3500 E Road. The tornado here was rated EF0 with a path width of 20 yards.

Tornado, Kankakee

When: June 5, 9:02 PM CST to 9:03 PM CST
Where: Kankakee County, 2.03 mi NNE of Irwin to 2.29 mi NNE of Irwin
Rating: EF1
Path length: 0.62 mi
Path width: 30 yd
Property damage: $500,000
Reported by: NWS Storm Survey
Coordinates: 41.078, -87.970

A brief tornado developed about 5 miles southwest of Kankakee, or 3 miles south of Limestone, in southern Kankakee County. This brief tornado caused damage to a farm just north of the intersection of 5000W Road and 3000S Road. Several trees were uprooted or snapped. A machine shed on the property was destroyed, along with farm equipment and vehicles. A quonset building was damaged, and a fence was blown over. The tornado was rated EF1 with winds estimated at around 100 mph.

Tornado, Livingston

When: June 5, 9:08 PM CST to 9:10 PM CST
Where: Livingston County, 0.97 mi W of Wing to 0.85 mi W of Wing
Rating: EF0
Path length: 0.39 mi
Path width: 50 yd
Property damage: $2,000
Reported by: Trained Spotter
Coordinates: 40.818, -88.418

A very brief and weak tornado occurred 6 miles northeast of Fairbury in southern Livingston County. There was damage to a barn and corn crop. Vents on this barn were torn off with the corn crop flattened and twisted throughout the field. The tornado was rated EF0 with winds estimated at around 70 mph.

Flash Flood, Kankakee

When: June 5, 9:10 PM CST to June 6, 12:45 AM CST
Where: Kankakee County, 0.57 mi SSE of Bourbonnais to 1.95 mi SE of West Kankakee
Cause: Heavy Rain
Reported by: Trained Spotter
Coordinates: 41.142, -87.877

Water was flowing over East River Road in Kankakee. Route 50 was flooded at Harrison Street and Greenwood Street in Kankakee. An underpass was flooded at Brookmont and Schuyler in Bradley. A spotter reported 1.86 inches of rain in Kankakee, the Kankakee Metro Waste Water facility reported 3.00 inches, Momence had 1.99 inches and Bourbonnais reported 1.51 inches.

Tornado, Kankakee

When: June 5, 9:18 PM CST to 9:37 PM CST
Where: Kankakee County, 2.73 mi ESE of Aroma Park to 1.24 mi SSW of Tallmadge
Rating: EF3
Path length: 7.75 mi
Path width: 175 yd
Injuries: 1 direct, 0 indirect
Property damage: $600,000
Reported by: NWS Storm Survey
Coordinates: 41.064, -87.752

The tornado began 3 miles northwest of St. Anne in Kankakee county. The tornado developed just west of 6000E Road and tracked to the east, where it produced damage to a home and a garage along the road. At this location, a single family home collapsed upon itself, leaving it inhabitable. The garage sustained damage to its roof and exterior walls. The tornado was rated EF2 with winds estimated at around 113 mph.

The tornado continued to move to the east northeast, where it increased in intensity as it encountered yet another family home at the intersection of Route 1 and 4000S Road. This home and the garage/barn next to it sustained considerable damage, leaving the home inhabitable. The damage to the home consisted of all the walls collapsing, with all remaining debris from the house tossed to the northeast. The garage walls collapsed with the contents tossed to the east. Two four-wheelers and a four-door automobile inside the garage were lifted and flipped over as the tornado passed. Further north along Route 1, there was minor structural damage to a couple of homes and several trees uprooted. Damage at this location was rated EF3 with winds estimated at around 142 mph and a path width of 175 yards.

As this tornado continued to the northeast, it lost its intensity as it came across another residence at the intersection of 4000S Road and 8500E Road. Here, a house sustained partial damage to its roof with several surrounding trees having limbs sheared at the top. The tornado weakened at this point, and damage was rated EF1 with winds estimated at around 97 mph and a path width of 50 yards.

The tornado moved to the northeast through a wooded area, causing damage to many trees along its way. The more significant damage occurred near the intersection of 13000E Road and Gamble Road in the Hopkins Park area, where several healthy large hardwood tree tops were sheared or broken. Some homes were damaged by falling trees. The tornado continued to weaken and damage was rated EF1, with winds estimated at around 88 mph, and a path width of 50 yards. It was along 13000E Road where the tornado appeared to lift, with no other damage evident beyond this point.

Tornado, Kankakee

When: June 5, 9:19 PM CST to 9:20 PM CST
Where: Kankakee County, 2.68 mi NW of Wichert to 2.28 mi NW of Wichert
Rating: EF1
Path length: 0.56 mi
Path width: 50 yd
Property damage: $75,000
Reported by: Law Enforcement
Coordinates: 41.073, -87.741

Spotters witnessed a brief secondary tornado to the north of the primary St. Anne tornado. This tornado touched down in a farm field near a creek, about 1/4 mile north of County Road 3500 S, and one quarter mile west of Illinois Route 1. It destroyed a machine shed and flipped over a large grain trailer. The tornado also blew down large tree limbs.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

Event	Date	Age	Sex	Where	Kind
Tornado, Livingston	2010-06-20	69	Male	Mobile/Trailer Home	Direct

What these are

Tornado: A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Illinois in 2010 Every state in 2010 This day in weather history The tornado archive for Illinois, 2010 Warnings in Illinois, June 2010

Sources

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: 224973, 226118, 225533, 225551, 225558, 226101, 226104, 241768, 242874, 226108, 226109, 226125, 242872, 226112, 226114.