840
NOUS43 KLOT 301928
PNSLOT
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-310730-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
228 PM CDT THU JUL 30 2026 /328 PM EDT THU JUL 30 2026/
...NWS DAMAGE SURVEY FOR 7/27/2026 SEVERE WEATHER EVENT - UPDATE
1...
OVERVIEW
INTENSE THUNDERSTORMS OCCURRED IN NORTHEAST ILLINOIS AND NORTHWEST
INDIANA DURING THE LATE MORNING AND AFTERNOON OF JULY 27, 2026.
THESE STORMS PRODUCED AT LEAST 7 TORNADOES IN THE NWS CHICAGO
SERVICE AREA, WHICH ARE DETAILED BELOW.
ADDITIONALLY, EXTENSIVE STRAIGHT-LINE WIND DAMAGE OCCURRED ACROSS
SEVERAL LOCATIONS IN AND NEAR THE CHICAGO METROPOLITAN AREA. THIS
INCLUDED PORTIONS OF LAKE COUNTY ILLINOIS AS WELL AS SOUTHERN
COOK AND EASTERN WILL COUNTIES WHERE 80 TO LOCALLY 100 MPH WIND
GUSTS LED TO SUBSTANTIAL TREE DAMAGE AND MULTIPLE INSTANCES OF
NOTABLE STRUCTURAL DAMAGE.
WE WOULD LIKE TO THANK OUR EMERGENCY MANAGEMENT PARTNERS FOR THEIR
ASSISTANCE IN THE DAMAGE INFORMATION COLLECTION AND SURVEY
PROCESS. WE WOULD ALSO LIKE TO THANK OUR BROADCAST MEDIA PARTNERS
AND THE GENERAL PUBLIC FOR RELAYING REPORTS OF STORM DAMAGE TO OUR
OFFICE.
GLEN ELLYN
RATING: EF0
ESTIMATED PEAK WIND: 75 MPH
PATH LENGTH /STATUTE/: 0.94 MILES
PATH WIDTH /MAXIMUM/: 75 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 07/27/2026
START TIME: 11:55 AM CDT
START LOCATION: 2 SSE GLENDALE HEIGHTS / DUPAGE COUNTY / IL
START LAT/LON: 41.8946 / -88.0658
END DATE: 07/27/2026
END TIME: 11:57 AM CDT
END LOCATION: 1 N GLEN ELLYN / DUPAGE COUNTY / IL
END LAT/LON: 41.8811 / -88.0633
SURVEY SUMMARY:
A BRIEF TORNADO BEGAN NEAR THE INTERSECTION OF STACY COURT AND
RAILROAD STREET IN UNINCORPORATED NORTH GLEN ELLYN. A NARROW
CORRIDOR OF PRIMARILY TREE DAMAGE CONTINUED SOUTH-SOUTHEAST
ACROSS PORTIONS OF GLEN ELLYN. THIS DAMAGE INCLUDED LARGE
BRANCHES THAT FELL ONTO POWER LINES AND DAMAGED SOME HOMES AND A
VEHICLE. DAMAGE IN THIS AREA WAS CONSISTENT WITH PEAK WINDS NEAR
75 MPH. THE TORNADO CONTINUED SOUTHWARD, PRODUCING ADDITIONAL
SPORADIC TREE DAMAGE UNTIL IT DISSIPATED NORTHWEST OF GLENBARD
WEST HIGH SCHOOL NEAR THE INTERSECTION OF HAWTHORNE BOULEVARD AND
PARK BOULEVARD.
WHEATON
RATING: EF0
ESTIMATED PEAK WIND: 75 MPH
PATH LENGTH /STATUTE/: 0.97 MILES
PATH WIDTH /MAXIMUM/: 100 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 07/27/2026
START TIME: 11:55 AM CDT
START LOCATION: 1 NNE WHEATON / DUPAGE COUNTY / IL
START LAT/LON: 41.8645 / -88.1
END DATE: 07/27/2026
END TIME: 11:57 AM CDT
END LOCATION: 1 ESE WHEATON / DUPAGE COUNTY / IL
END LAT/LON: 41.8508 / -88.0974
SURVEY SUMMARY:
THIS BRIEF TORNADO BEGAN IN THE VICINITY OF E. LIBERTY DRIVE AND
S. WASHINGTON STREET SOUTH OF WHEATON COLLEGE. A CONCENTRATED
CORRIDOR OF DAMAGE WAS NOTED, PARTICULARLY IN THE VICINITY OF E.
INDIANA STREET AND CAMPBELL AVENUE, WHERE THE TOPS OF SEVERAL
SOFTWOOD TREES WERE SNAPPED AND NUMEROUS LIMBS WERE DOWNED.
DAMAGE IN THIS AREA WAS CONSISTENT WITH PEAK WINDS NEAR 75 MPH.
THE TORNADO CONTINUED SOUTHWARD, PRODUCING SPORADIC TREE DAMAGE
UNTIL IT DISSIPATED IN THE VICINITY OF ALCHESTER DRIVE.
ADDITIONAL DAMAGE WAS NOTED IN THE AREA WHICH WAS LIKELY
ASSOCIATED WITH A SWATH OF DAMAGING STRAIGHT-LINE WINDS THAT
MOVED THROUGH A FEW MINUTES AFTER THIS TORNADO OCCURRED.
DOWNERS GROVE
RATING: EF0
ESTIMATED PEAK WIND: 85 MPH
PATH LENGTH /STATUTE/: 2.12 MILES
PATH WIDTH /MAXIMUM/: 100 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 07/27/2026
START TIME: 12:09 PM CDT
START LOCATION: 1.3 S DOWNERS GROVE / DUPAGE COUNTY / IL
START LAT/LON: 41.7896 / -88.0169
END DATE: 07/27/2026
END TIME: 12:13 PM CDT
END LOCATION: 2.1 NE WOODRIDGE / DUPAGE COUNTY / IL
END LAT/LON: 41.7635 / -88.0054
SURVEY SUMMARY:
THE TORNADO TOUCHED DOWN NEAR THE INTERSECTION OF MAPLE AVE AND
BROOKBANK ROAD BEFORE CONTINUING SOUTHEASTWARD THROUGH
NEIGHBORHOODS ON THE SOUTH SIDE OF DOWNERS GROVE. DAMAGE ALONG THE
PATH OF THE TORNADO CONSISTED OF SNAPPED AND UPROOTED TREES AND
DOWNED TREE BRANCHES. THE TORNADO APPEARED TO LIFT OVER MCCOLLUM
PARK. THIS TORNADO WAS WITHIN A BROADER REGION OF STRAIGHT LINE
WINDS AND WAS IDENTIFIED BY A CORRIDOR OF LOCALLY MORE INTENSE
WIND DAMAGE WITH TREE BRANCHES TORN FROM THE TOPS OF TREES AS WELL
AS A SUBTLE RADAR DEBRIS SIGNATURE VISIBLE ON KLOT RADAR IMAGERY.
ORLAND PARK
RATING: EF0
ESTIMATED PEAK WIND: 85 MPH
PATH LENGTH /STATUTE/: 2.91 MILES
PATH WIDTH /MAXIMUM/: 250 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 07/27/2026
START TIME: 12:28 PM CDT
START LOCATION: 3.3 SW PALOS PARK / COOK COUNTY / IL
START LAT/LON: 41.6521 / -87.8972
END DATE: 07/27/2026
END TIME: 12:33 PM CDT
END LOCATION: 0.7 SW ORLAND PARK / COOK COUNTY / IL
END LAT/LON: 41.6171 / -87.8661
SURVEY SUMMARY:
THE TORNADO TOUCHED DOWN NEAR W 131ST STREET NEAR TAMPIER SLOUGH
AND MOVED SOUTHEASTWARD ACROSS WESTERN ORLAND PARK. NUMEROUS TREES
WERE DOWNED ALONG THE PATH OF THE TORNADO BEFORE IT LIFTED IN A
NEIGHBORHOOD WEST OF ORLAND SQUARE MALL.
ROMEOVILLE
RATING: EF0
ESTIMATED PEAK WIND: 80 MPH
PATH LENGTH /STATUTE/: 2.54 MILES
PATH WIDTH /MAXIMUM/: 110 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 07/27/2026
START TIME: 12:28 PM CDT
START LOCATION: 1.4 MILES SE ROMEOVILLE / WILL COUNTY / IL
START LAT/LON: 41.6302 / -88.0777
END DATE: 07/27/2026
END TIME: 12:33 PM CDT
END LOCATION: 1.4 MILES W LOCKPORT / WILL COUNTY / IL
END LAT/LON: 41.5943 / -88.0823
SURVEY SUMMARY:
BASED ON A STORM SURVEY AND RADAR DATA FROM TMDW, A BRIEF EF-0
TORNADO TOUCHED DOWN NEAR OR JUST NORTHEAST OF THE INTERSECTION OF
ILLINOIS ROUTE 53 AND MATERIAL SERVICES ROAD ACROSS FROM
ROMEOVILLE HIGH SCHOOL. THE TORNADO THEN TRAVELED SOUTHWESTWARD
ACROSS BRONSON CEMETERY AND DIRECTLY OVER THE CAMPUS OF LEWIS
UNIVERSITY. DAMAGE ON THE CAMPUS CONSISTED OF NUMEROUS DOWNED AND
SNAPPED TREE LIMBS, DAMAGED FENCING MATERIAL AND TO THE DUGOUT OF
A BASEBALL FIELD, AND DAMAGE TO AN HVAC SYSTEM ON THE ROOF OF A
BUILDING. THE TORNADO APPEARED TO LIFT NEAR RENWICK ROAD.
COUNTRY CLUB HILLS - GLENWOOD
RATING: EF1
ESTIMATED PEAK WIND: 110 MPH
PATH LENGTH /STATUTE/: 11.43 MILES
PATH WIDTH /MAXIMUM/: 200 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 07/27/2026
START TIME: 12:47 PM CDT
START LOCATION: 1 NW COUNTRY CLUB HILLS / COOK COUNTY / IL
START LAT/LON: 41.5772 / -87.74.
END DATE: 07/27/2026
END TIME: 01:03 PM CDT
END LOCATION: GLENWOOD / COOK COUNTY / IL
END LAT/LON: 41.5475 / -87.6244
SURVEY SUMMARY:
THE TORNADO APPEARED TO START JUST EAST OF INTERSTATE 57 AND
MOVED EASTWARD CROSSING INTERSTATE 80 ON THE NORTHWEST SIDE OF
COUNTRY CLUB HILLS. THE TORNADO THEN PROGRESSED NORTHEASTWARD
THROUGH HAZEL CREST DOWNING TREES AND TREE LIMBS AND REMOVING THE
ROOFING MATERIALS OF MULTIPLE APARTMENT BUILDINGS NEAR
POTTAWATOMIE SCHOOL. AFTER CROSSING INTERSTATE 80 AGAIN NEAR THE
JUNCTION WITH INTERSTATE 294, THE TORNADO MADE AN UNUSUAL COUNTER-
CLOCKWISE LOOP ON THE SOUTHWESTERN SIDE OF HARVEY CAUSING
PRIMARILY TREE AND COSMETIC STRUCTURE DAMAGE. THE TORNADO THEN
RAPIDLY ACCELERATED SOUTHEASTWARD AND REACHED PEAK INTENSITY WHILE
REMOVING THE ROOF OF AN INDUSTRIAL BUILDING JUST NORTH OF W 167
STREET AND CAUSING EXTERIOR WALL AND ROOF DAMAGE TO AN APARTMENT
COMPLEX ON 171ST STREET IN HAZEL CREST. AFTER CROSSING INTERSTATE
80 FOR A THIRD TIME, THE TORNADO CONTINUED SOUTHEASTWARD THROUGH
THE NORTH SIDE OF HOMEWOOD. FOUR DOUBLE-STACKED INTERMODAL
CONTAINERS WEIGHING APPROXIMATELY 75 TONS EACH WERE TIPPED OVER IN
A RAIL YARD AND NUMEROUS ADDITIONAL TREES WERE DAMAGED BEFORE THE
TORNADO LIFTED NEAR THE GLENWOOD ACADEMY ON THE FAR NORTHWEST
SIDE OF GLENWOOD.
LYNWOOD - MUNSTER
RATING: EF1
ESTIMATED PEAK WIND: 110 MPH
PATH LENGTH /STATUTE/: 3.73 MILES
PATH WIDTH /MAXIMUM/: 225 YARDS
FATALITIES: 0
INJURIES: TBD
START DATE: 07/27/2026
START TIME: 12:58 PM CDT
START LOCATION: 2 E GLENWOOD / COOK COUNTY / IL
START LAT/LON: 41.5417 / -87.5804
END DATE: 07/27/2026
END TIME: 01:05 PM CDT
END LOCATION: 1 NW MUNSTER / LAKE COUNTY / IN
END LAT/LON: 41.5614 / -87.5154
SURVEY SUMMARY:
THE TORNADO TOUCHED DOWN JUST EAST OF STATE ROUTE 394 AND
PROGRESSED NORTHEASTWARD INTO THE COMMUNITY OF LANSING. DAMAGE
ALONG THE PATH WAS MOST SEVERE IN A NEIGHBORHOOD NEAR HERITAGE
MIDDLE SCHOOL WHERE SEVERAL HOMES SUSTAINED DAMAGE TO EXTERIOR
WALLS AND ROOFS. THE TORNADO CONTINUED NORTHEASTWARD CAUSING
PRIMARILY TREE DAMAGE AND COSMETIC DAMAGE TO STRUCTURES WHILE
MOVING INTO INDIANA BEFORE LIFTING ON THE THE FAR WEST SIDE OF
MUNSTER.
SOUTHERN COOK AND EASTERN WILL COUNTY STRAIGHT LINE WINDS
DETERMINATION: STRAIGHT LINE WINDS
ESTIMATED PEAK WINDS: 80 TO 100 MPH
FATALITIES: 0
INJURIES: 2
START DATE: 07/27/2026
START TIME: 12:45 PM CDT
SUMMARY:
EXTREME STRAIGHT-LINE WINDS IMPACTED EASTERN WILL COUNTY AND
SOUTHERN COOK COUNTY AS AN INTENSE SUPERCELL THUNDERSTORM EVOLVED
INTO A COMPACT BOW ECHO.
IN WILL COUNTY, THE HARDEST HIT AREAS WERE IN MONEE, CRETE, STEGER,
BEECHER, AND UNIVERSITY PARK WHERE WIND GUSTS LIKELY RANGED FROM
80 TO LOCALLY 100 MPH. WIDESPREAD TREE, STRUCTURE, AND POWER
INFRASTRUCTURE DAMAGE WAS REPORTED REQUIRING EXTENSIVE MULTI-DAY
MUTUAL AID FOR CLEAN-UP EFFORTS. THERE WAS A NEAR COMPLETE POWER
LOSS IN THE AREA WITH REPORTED DAMAGE BEING THE WORST EXPERIENCED
IN SEVERAL DECADES. TWO INJURIES WERE REPORTED IN BEECHER
ASSOCIATED WITH AN OVERTURNED SEMI- TRUCK. EXTENSIVE TREE DAMAGE
WAS ALSO REPORTED IN NEW LENOX, FRANKFORT, FRANKFORT SQUARE, AND
MOKENA WHERE WIND SPEEDS LIKELY EXCEEDED 80 MPH.
IN COOK COUNTY, THE HARDEST HIT AREAS WERE IN PALOS HEIGHTS, MARKHAM,
FLOSSMOOR, AND CHICAGO HEIGHTS WHERE WIND GUSTS LIKELY EXCEEDED 80
MPH. EXTENSIVE SNAPPED AND UPROOTED TREES OCCURRED IN THESE
AREAS. IT IS POSSIBLE THAT BRIEF TORNADOES BEYOND THOSE CONFIRMED
OCCURRED ON THE NORTHERN EDGE OF THE DESTRUCTIVE WIND SWATH IN COOK
COUNTY.
LAKE COUNTY IL STRAIGHT LINE WINDS
DETERMINATION: STRAIGHT LINE WINDS
ESTIMATED PEAK WINDS: 80 TO 90 MPH
FATALITIES: 0
INJURIES: 0
START DATE: 07/27/2026
START TIME: 3:30 PM CDT
SUMMARY:
DESTRUCTIVE STRAIGHT-LINE WINDS IMPACTED PORTIONS OF LAKE COUNTY
ILLINOIS AS A LINE OF STORMS MOVED SOUTHWARD ALONG THE LAKE
MICHIGAN SHORELINE. THE STRONGEST WINDS OCCURRED BETWEEN
INTERSTATE 94 AND LAKE MICHIGAN NEAR AN APPARENT REAR FLANK REGION
OF AN EMBEDDED SUPERCELL. DAMAGE STARTED NEAR ZION AND EXTENDED
SOUTHWARD THROUGH WAUKEGAN, NORTH CHICAGO, LAKE FOREST, AND
DEERFIELD. THE MOST DESTRUCTIVE DAMAGE WAS REPORTED IN WAUKEGAN
WHERE A PORTION OF A ROOF WAS BLOWN OFF AN APARTMENT BUILDING ON
NORTH BUTRICK STREET AND WIDESPREAD TREES WERE SNAPPED AND
UPROOTED. THE ASOS STATION AT THE WAUKEGAN AIRPORT MEASURED AN 82
MPH WIND GUST BEFORE POWER WAS LOST, AND SEVERAL HANGERS WERE
DAMAGED ONSITE. MANY LARGE TREES WERE ALSO DOWNED NEAR LAKE FOREST
ACADEMY AND DEERFIELD. PEAK WIND GUSTS WERE ESTIMATED BETWEEN 80
AND 90 MPH IN THE SWATH OF DESTRUCTIVE WINDS.
EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE
FOLLOWING CATEGORIES:
EF0.....65 TO 85 MPH
EF1.....86 TO 110 MPH
EF2.....111 TO 135 MPH
EF3.....136 TO 165 MPH
EF4.....166 TO 200 MPH
EF5.....>200 MPH
NOTE:
THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENTS AND PUBLICATION IN
NWS STORM DATA.
NWS CHICAGO
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