Tropical moisture from Priscilla will bring a multi-day thunderstorm, widespread heavy rainfall and flash flooding event across the Southwest/Four Corners region. Flash flooding will be a concern in burn scars, slot canyons, and urban areas. Widespread storms are expected in central/South Florida with some isolated flash flooding possible. Read More >
Summary
The 12 tornadoes that occurred in northern Illinois, in chronological order: 1.) Sterling/Rock Falls, IL EF-1 2.) Edgington, IL EF-2 (Rock Island County -- not included in map below) 3.) Whiteside County/Lee County EF-1 4.) Harmon, IL EF-1 5.) Woodhaven Lakes/Sublette, IL EF-2 6.) Mendota, IL EF-1 7.) Wedron, IL EF-1 8.) Seneca/Morris, IL EF-1 9.) Mazon, IL EF-1 10.) Coal City-Braidwood, IL EF-3 11.) Bourbonnais, IL EF-1 12.) Herscher/Chebanse, IL EF-0 |
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Tornadoes
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE CHICAGO,IL 1030 PM CDT FRI JUN 26 2015 ...JUNE 22 2015 TORNADO EVENT... TORNADO COUNTS: # IN NORTHERN ILLINOIS: 12 # IN NWS DAVENPORT COUNTY WARNING AREA: 3 # IN NWS CHICAGO COUNTY WARNING AREA: 10 # THAT CROSSED CWAS: 1 # FROM SUPERCELL STORM THAT MOVED FROM STERLING TO BOURBONNAIS: 10 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 START TIME: 714 PM CDT START LOCATION: 1 MILE NORTHEAST OF ROCK FALLS IL END TIME: 718 PM CDT END LOCATION: 2.5 MILES SOUTHEAST OF ROCK FALLS IL
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.TORNADO #2: EDGINGTON IL TORNADO...* RATING: EF-2 ESTIMATED PEAK WIND: 120 MPH PATH LENGTH /STATUTE/: 4.2 MILES START TIME: 715 PM CDT START LOCATION: 1.3 W EDGINGTON / ROCK ISLAND / IL END TIME: 723 PM CDT END LOCATION: 2.2 E EDGINGTON / ROCK ISLAND / IL * NOTE THESE TORNADOES WERE IN THE NWS DAVENPORT CWA BUT ARE LISTED HERE FOR SUMMARY PURPOSES. PLEASE VISIT WEATHER.GOV/DVN FOR MORE.---------------------------------------------------------------- .TORNADO #3: 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.
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.TORNADO #4: 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..png)
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.TORNADO #5: 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: VERY SIGNIFICANT TREE DAMAGE...WITH MANY LARGE TREES SNAPPED OR 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 WERE THE MOST IN ONE CALENDAR DAY IN THE TORNADO PERIOD OF RECORD /SINCE 1950/.
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.TORNADO #6: 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 TREE DAMAGE...WITH MULTIPLE TREES SNAPPED OR UPROOTED IN TOWN. SOME OF THESE TREES ENDED UP ON STRUCTURES CAUSING DAMAGE INCLUDING AT LEAST ONE ON A VEHICLE. DAMAGE ON THE FAR NORTH END OF TOWN INCLUDING NUMEROUS TREES DOWN IN RESTLAND CEMETERY WAS NOT FROM THIS TORNADO AND LIKELY FROM STRAIGHT-LINE WINDS.
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.TORNADO #7: 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: SEVERAL LARGE TREES SNAPPED OR UPROOTED. ONE TREE WAS DOWNED ON A HOUSE. ONE TRAILER WAS BLOWN OVER.
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.TORNADO #8: SENECA AND MORRIS AREA TORNADO RATING: EF-1 PEAK WIND: 90 MPH PATH LENGTH: 7.2 MILES PATH WIDTH MAXIMUM: 150 YARDS FATALITIES: 0 INJURIES: 0 START DATE: JUN 22 2015 START TIME: 917 PM CDT START LOCATION: 5.6 MILES NORTH OF SENECA IL START LAT/LON: 41.3996 / -88.6139 END DATE: JUN 22 2015 END TIME: 929 PM CDT END LOCATION: 3.0 MILES WEST-SOUTHWEST OF MORRIS IL END LAT/LON: 41.3552 / -88.4915 SURVEY SUMMARY: THIS TORNADO WAS DETERMINED BASED ON REPORTS FROM TRAINED STORM SPOTTERS AND PHOTOS OF DAMAGE COUPLED WITH RADAR. DAMAGE INCLUDED A FEW SNAPPED LARGE TREES AND MINOR STRUCTURAL DAMAGE TO OUTBUILDINGS. THIS TORNADO CROSSED INTERSTATE 80 NEAR THE SENECA EXIT. DURING THIS TIME...TRAINED STORM SPOTTERS REPORTED STRONG REAR-FLANK DOWNDRAFT WINDS TO THE SOUTH OF THE PATH WHICH DID LEAD TO SOME MINOR DAMAGE.
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.TORNADO #9: 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.
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.TORNADO #10: 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 DAMAGED 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.
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.TORNADO #11: 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.
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.TORNADO #12: HERSCHER AND CHEBANSE AREA TORNADO 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.
The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
| EF-0 Weak 65-85 mph |
EF-1 Moderate 86-110 mph |
EF-2 Significant 111-135 mph |
EF-3 Severe 136-165 mph |
EF-4 Extreme 166-200 mph |
EF-5 Catastrophic 200+ mph |
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Straight-Line Winds
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Radar
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Photos
Additional damage photos can be found in our Facebook photo album for this event.
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| Coal City, IL | Coal City, IL | Coal City, IL |
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| Coal City, IL | Coal City, IL | Coal City, IL |
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| Coal City, IL | Braidwood, IL | Mendota, IL |
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| Woodhaven Lakes, IL | Woodhaven Lakes, IL | Near Sublette, IL |
Environment
Rainfall
Approximate 24-hour rainfall totals. The main thunderstorm that tracked through the area was considered to be a high-precipitation (HP) supercell due to the heavy rainfall that it produced, on top of the other severe weather that it was responsible for. The track that it took is illustrated very well in this rainfall map, and flash flooding was observed within this corridor of heavier rainfall as additional thunderstorms developed behind the main supercell thunderstorm and trained over the same areas.
Additional Information
Climatology (as of June 2015)
Additional Links
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Media use of NWS Web News Stories is encouraged! Please acknowledge the NWS as the source of any news information accessed from this site. Additional recaps can be found on the NWS Chicago Past Events Page |
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