Public Information Statement
Issued by NWS Chicago, IL

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NOUS43 KLOT 250929
PNSLOT
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
252130-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO,IL
429 AM CDT THU JUN 25 2015

...JUNE 22 2015 TORNADO EVENT...

THERE WERE TEN TORNADOES CONFIRMED IN NORTHERN ILLINOIS ON JUNE 22
2015. NINE OF THESE WERE IN THE NWS CHICAGO FORECAST AREA WHILE THE
FIRST ONE WAS IN THE NWS DAVENPORT CWA. NINE OF THE TEN TORNADOES
FORMED FROM ONE LONG-LIVED SUPERCELL THUNDERSTORM WHICH BASICALLY
PERSISTED FROM 700 PM TO 1030 PM.

THE NATIONAL WEATHER SERVICE WOULD LIKE TO THANK EMERGENCY MANAGEMENT
AND PUBLIC OFFICIALS FROM SEVERAL COUNTIES FOR THEIR ASSISTANCE WITH
THE SURVEYS. IN ADDITION...REPORTS FROM TRAINED STORM SPOTTERS WERE
VERY HELPFUL. THESE SURVEYS WOULD NOT HAVE BEEN ABLE TO BE COMPLETED
SO READILY WITHOUT THE ASSISTANCE OF NEIGHBORING NWS OFFICES IN
DAVENPORT IOWA AND LINCOLN ILLINOIS AS WELL AS OUR ACADEMIC PARTNERS
FROM THE COLLEGE OF DUPAGE METEOROLOGY DEPARTMENT.


.TORNADO #1: STERLING AND ROCK FALLS TORNADO...*

RATING:                 EF-1
ESTIMATED PEAK WIND:    100 MPH
PATH LENGTH /STATUTE/:  2.2 MILES
PATH WIDTH /MAXIMUM/:   75 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUN 22 2015
START TIME:             714 PM CDT
START LOCATION:         1 MILE NORTHEAST OF ROCK FALLS IL
START LAT/LON:          41.7909 / -89.6707

END DATE:               JUNE 22 2015
END TIME:               718 PM CDT
END LOCATION:           2.5 MILES SOUTHEAST OF ROCK FALLS IL
END LAT/LON:            41.7686 / -89.6402

SURVEY SUMMARY: MAINLY DAMAGE TO TREES AND POWERLINES.

* NOTE THIS TORNADO WAS IN THE NWS DAVENPORT CWA BUT IS LISTED
HERE FOR SUMMARY PURPOSES.


----------------------------------------------------------------

.TORNADO #2: WHITESIDE COUNTY TO LEE COUNTY TORNADO...

RATING:                 EF-1
PEAK WIND:              105 MPH
PATH LENGTH:            2.6 MILES
PATH WIDTH MAXIMUM:     50 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUN 22 2015
START TIME:             716 PM CDT
START LOCATION:         3.5 MILES SOUTHEAST OF ROCK FALLS IL
START LAT/LON:          41.7360 / -89.6509

END DATE:               JUN 22 2015
END TIME:               720 PM CDT
END LOCATION:           3.5 MILES WEST OF HARMON IL
END LAT/LON:            41.7099 / -89.6174

SURVEY SUMMARY: MAINLY DAMAGE TO TREES AND POWERLINES. DAMAGE TO
SIDING ON HOUSE.

NOTE: THIS TORNADO CROSSED FROM THE NWS DAVENPORT IA CWA INTO THE
NWS CHICAGO CWA. THE LEE COUNTY PORTION OF THE TORNADO PATH WAS
ABOUT 0.8 MILES LONG.

----------------------------------------------------------------

.TORNADO #3: HARMON AREA TORNADO

RATING:                 EF-1
PEAK WIND:              105 MPH
PATH LENGTH:            7.5 MILES
PATH WIDTH MAXIMUM:     50 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUN 22 2015
START TIME:             728 PM CDT
START LOCATION:         2.5 MILES NORTHWEST OF HARMON IL
START LAT/LON:          41.7436 / -89.5917

END DATE:               JUN 22 2015
END TIME:               740 PM CDT
END LOCATION:           5.1 MILES EAST SOUTHEAST OF HARMON IL
END LAT/LON:            41.6971 / -89.4615

SURVEY SUMMARY: NARROW PATH OF MAINLY TREE DAMAGE. REAR FLANK
DOWNDRAFT DAMAGE WAS NOTED SOUTH OF THE PATH INCLUDING DAMAGE
A ROOF BLOWN OFF A BUILDING IN HARMON. STORM SPOTTERS ASSISTED
WITH THE IDENTIFYING OF THE TORNADO.


---------------------------------------------------------------

.TORNADO #4: WOODHAVEN LAKES/SUBLETTE TORNADO

RATING:                 EF-2
PEAK WIND:              130 MPH
PATH LENGTH:            7.8 MILES
PATH WIDTH MAXIMUM:     ONE HALF MILE
FATALITIES:             0
INJURIES:               7

START DATE:             JUN 22 2015
START TIME:             753 PM CDT
START LOCATION:         4.0 MILES SOUTH OF AMBOY IL
START LAT/LON:          41.6565 / -89.3213

END DATE:               JUN 22 2015
END TIME:               811 PM CDT
END LOCATION:           3.4 MILES SOUTHEAST OF SUBLETTE IL
END LAT/LON:            41.6044 / -89.1874

SURVEY SUMMARY: SIGNIFICANT TREES SNAPPED AND UPROOTED IN
WOODHAVEN LAKES CAMPING RESORT AREA. SEVERAL OF THESE FELL
ON RECREATIONAL VEHICLES.

NOTES: THIS WAS THE STRONGEST TORNADO DAMAGE RATING WITHIN LEE
COUNTY ITSELF SINCE AN F2 TORNADO ON JULY 8 1993. THE THREE
TORNADOES IN LEE COUNTY WAS THE MOST IN ONE CALENDAR DAY IN THE
TORNADO PERIOD OF RECORD /SINCE 1950/.


---------------------------------------------------------------

.TORNADO #5: MENDOTA TORNADO

RATING:                 EF-1
PEAK WIND:              105 MPH
PATH LENGTH:            1.5 MILES
PATH WIDTH /MAXIMUM/:   150 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUN 22 2015
START TIME:             819 PM CDT
START LOCATION:         WEST SIDE OF MENDOTA IL
START LAT/LON:          41.5536 / -89.1334

END DATE:               JUN 22 2015
END TIME:               824 PM CDT
END LOCATION:           JUST OUTSIDE EAST SIDE OF MENDOTA IL
END LAT/LON:            41.5454 / -89.1070

SURVEY SUMMARY: SIGNIFICANT TREES SNAPPED AND UPROOTED IN TOWN.
SOME OF THESE TREES ENDED UP ON STRUCTURES CAUSING DAMAGE
INCLUDING AT LEAST ONE ON A VEHICLE.


---------------------------------------------------------------

.TORNADO #6: NORTH OF OTTAWA AND WEDRON AREA TORNADO

RATING:                 EF-1
PEAK WIND:              90 MPH
PATH LENGTH:            6.1 MILES
PATH WIDTH MAXIMUM:     150 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUN 22 2015
START TIME:             850 PM CDT
START LOCATION:         8 MILES NORTH-NORTHWEST OF OTTAWA IL
START LAT/LON:          41.4701 / -88.8719

END DATE:               JUN 22 2015
END TIME:               902 PM CDT
END LOCATION:           0.7 MILES NORTHEAST OF WEDRON IL
END LAT/LON:            41.4407 / -88.7620

SURVEY SUMMARY: SIGNIFICANT TREES SNAPPED AND UPROOTED. ONE TREE
WAS DOWNED ON A HOUSE. ONE TRAILER WAS BLOWN OVER.


---------------------------------------------------------------

.TORNADO #7: MAZON AREA TORNADO

RATING:                 EF-1
ESTIMATED PEAK WIND:    95 MPH
PATH LENGTH:            0.8 MILES
PATH WIDTH MAXIMUM:     100 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUNE 22 2015
START TIME:             943 PM CDT
START LOCATION:         3.5 MILES NORTHEAST OF MAZON IL
START LAT/LON:          41.2802 / -88.3818

END DATE:               JUNE 22 2015
END TIME:               946 PM CDT
ESTIMATED END LOCATION: 4.0 MILES NORTHEAST OF MAZON IL
ESTIMATED END LAT/LON:  41.2806 / -88.3669

SURVEY SUMMARY: PORTION OF A HOUSE ROOF BLOWN OFF. LARGE TREE
SNAPPED AT RESIDENCE.


---------------------------------------------------------------

TORNADO #8:  COAL CITY TO BRAIDWOOD TORNADO

RATING:                 EF-3
ESTIMATED PEAK WIND:    160 MPH
PATH LENGTH:            16.5 MILES
PATH WIDTH MAXIMUM:     THREE-QUARTERS OF A MILE.
FATALITIES:             0
INJURIES:               7

START DATE:             JUNE 22 2015
START TIME:             945 PM CDT
START LOCATION:         4 MILES SOUTHEAST OF MORRIS IL
                        4 MILES WEST NORTHWEST OF CARBON HILL IL
START LAT/LON:          41.3082 / -88.3823

END DATE:               JUNE 22 2015
END TIME:               1012 PM CDT
ESTIMATED END LOCATION: 6.9 MILES SOUTHEAST OF BRAIDWOOD IL
ESTIMATED END LAT/LON:  41.2255 / -88.0897

SURVEY SUMMARY: DOZENS OF HOMES HEAVILY DAMAGE IN COAL CITY WITH
THREE COMPLETELY DESTROYED. TWO OF THESE HAD AT LEAST PART OF THEIR
STRUCTURE BOLTED DOWN TO THE FOUNDATION WITH THE BOLTS SECURED BY
NUTS. TWO HIGH TENSION METAL TRUSSES WERE DOWNED INCLUDING ONE THAT
WAS CRUMPLED. HUNDREDS OF TREES WERE SNAPPED OR UPROOTED. NUMEROUS
UTILITY POLES WERE DOWNED. THIS TORNADO DID CROSS PART OF THE
PROPERTY OF THE BRAIDWOOD NUCLEAR GENERATING STATION CAUSING TREE
DAMAGE.

NOTES: THIS WAS THE STRONGEST TORNADO TO STRIKE GRUNDY COUNTY
SINCE AN F3 TORNADO ON JULY 17 1972.

THIS TORNADO CROSSED THE PATH OF AN EF-2 WHICH STRUCK 19 MONTHS
EARLIER ON NOVEMBER 17 2013.


---------------------------------------------------------------

.TORNADO #9: BOURBONNAIS TORNADO

RATING:                 EF-1
ESTIMATED PEAK WIND:    90 MPH
PATH LENGTH:            2.3 MILES
PATH WIDTH MAXIMUM:     300 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUNE 22 2015
START TIME:             1008 PM CDT
START LOCATION:         2.1 MILES NORTHWEST OF BOURBONNAIS IL
START LAT/LON:          41.1785 / -87.8896

END DATE:               JUNE 22 2015
END TIME:               1012 PM CDT
ESTIMATED END LOCATION: 1.1 MILES NORTHEAST OF BOURBONNAIS IL
ESTIMATED END LAT/LON:  41.1647 / -87.8507

SURVEY SUMMARY: ALMOST ENTIRELY TREE DAMAGE. NUMEROUS TREE TOPS
SNAPPED WITH A HANDFUL OF FULL TREES UPROOTED. A COUPLE TREES
SNAPPED.


---------------------------------------------------------------

.TORNADO #10: HERSCHER AND CHEBANSE AREA TORNADO (5 MILES EAST-SOUTHEAST)

RATING:                 EF-0
ESTIMATED PEAK WIND:    75 MPH
PATH LENGTH:            1.0 MILE
PATH WIDTH MAXIMUM:     50 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             JUNE 22 2015
START TIME:             1146 PM CDT
START LOCATION:         4.7 MILES SOUTHEAST OF HERSCHER IL
START LAT/LON:          41.0155 / -88.0138

END DATE:               JUNE 22 2015
END TIME:               1148 PM CDT
ESTIMATED END LOCATION: 4.4 WEST-NORTHWEST OF CHEBANSE IL
ESTIMATED END LAT/LON:  41.0124 / -87.9947

THE TORNADO BRIEFLY TOUCHED DOWN AND DID NO DAMAGE. THIS WAS REPORTED
BY A TRAINED STORM SPOTTER AND LAW ENFORCEMENT.


---------------------------------------------------------------

EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES
TORNADOES INTO THE FOLLOWING CATEGORIES.

EF0...WEAK......65 TO 85 MPH
EF1...WEAK......86 TO 110 MPH
EF2...STRONG....111 TO 135 MPH
EF3...STRONG....136 TO 165 MPH
EF4...VIOLENT...166 TO 200 MPH
EF5...VIOLENT...>200 MPH

$$

FRIEDLEIN/GENSINI/AUTEN/DUBBERKE/BORCHARDT/PIECHOTA/CASTRO



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