Alert archive / Illinois / Tornado Warnings in 1986
Tornado Warning 3, NWS Chicago, IL
NWS Chicago, IL issued this tornado warning at Jul 6, 1986, 7:23 PM CDT for Lake County, McHenry County, Illinois. It was in force for 67 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 6, 1986, 7:23 PM CDT (00:23 UTC)
- Expired
- Jul 6, 1986, 8:30 PM CDT
- In force
- 67 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
Counties Lake County, IL, McHenry County, IL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 7:45 PM CDT | Tornado F0 | Lake, IL |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.4 hours before the alert went out and 238 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1867 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHI 070023 TORCHI ILC111-097-070130- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE CHICAGO IL 723 PM CDT SUN JUL 6 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST ILLINOIS...EASTERN MCHENRY AND LAKE ...THIS WARNING ALSO INCLUDES THE ADJACENT PORTIONS OF LAKE MICHIGAN AT 7 20 PM MCHENRY COUNTY EMERGENCY SERVICES SPOTTED A TORNADO APPRACHING THE CITY OF MCHENRY FROM CRYSTAL LAKE. THIS STORM WAS MOVING NORTHEAST ABOUT 35 MILES AN HOUR. THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY ! IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING. YOU MAY REPORT ANY SEVERE WEATHER SUCH AS TORNADOES...DAMAGING WINDS...LARGE HAIL...OR FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE. ATTN ISP 2 AND 15 SOMREK
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 6, 4:21 PM CDT, 3 hours 2 minutes before
NATIONAL WEATHER SERVICE ROCKFORD IL SPECIAL WEATHER STATEMENT 420 PM CDT SUN JULY 6 1986 ... STRONG THUNDERSTORM MOVING TOWARD DIXON ILLINOIS ... AT 418 PM A STRONG THUNDERSTORM WAS INDICATED ON RADAR NEAR STERLING ILLINOIS WHICH IS ABOUT 45 MILES NORTHEAST OF MOLINE ILLINOIS. MOVEMENT WAS NORTHEAST AT ABOUT 25 MPH. THE THUNDERSTORM IS HEADING FOR SOUTHWEST OGLE COUNTY AND NORTHWEST LEE COUNTY... PERSON NEAR THE COMMUNITES OF DIXON.. POLO.. GRAND DETOUR.. WOOSUNG.. AND PALMYRA BE ALERT FOR THIS THUNDERSTORM. THIS THUNDERSTORM IS CAPABLE OF PRODUCING STRONG GUSTY SURFACE WINDS.. VERY HEAVY RAIN.. AND POSSIBLY SOME SMALL HAIL. MOST OF ALL... DEADLY LIGHTNING! IF OUT-OF-DOORS MOVE TO AN INSIDE SHELTER OR AUTOMOBILE. STAY OFF OF WATER AND AWAY FROM TREES... BOTH FREQUENT CONDUCTORS OF LIGHTNING. STAY AWAY FROM WINDOWS AND ELECTRIC APPLIANCES WHICH TO CAN CONDUCT ELECTRICITY. PLEASE REPORT STORM DAMAGE AND SEVERE WEATHER TO? LAW ENFORCEMENT OFFICIALS AND ASK THEM TO RELAY THIS INFORMATION TO THE NATIONAL WEATHR SERVICE. ATTN: ISP DIST 1 PIERCE
Special weather statement, Jul 6, 5:03 PM CDT, 2 hours 20 minutes before
NATIONAL WEATHER SERVICE ROCKFORD IL SPECIAL WEATHER STATEMENT 505 PM CDT SUN JULY 6 1986 ... ANOTHER STRONG THUNDERSTORM MOVING TOWARD DIXON ILLINOIS ... AT 502 PM A STRONG THUNDERSTORM WAS INDICATED ON RADAR WEST OF STERLING ILLINOIS WHICH IS ABOUT 45 MILES NORTHEAST OF MOLINE ILLINOIS. ANOTHERN STRONG STORM WAS JUST WEST OF OREGON ILLINOIS.. 20 SOUTH OF ROCKFORD. MOVEMENT WAS NORTHEAST AT ABOUT 25 MPH. THE THUNDERSTORMS ARE HEADING AROSS OGLE COUNTY AND TOWARD NORTHWEST LEE COUNTY... PERSON NEAR THE COMMUNITES OF DIXON.. POLO.. GRAND DETOUR.. ROCHELLE AND PALMYRA BE ALERT FOR THIS THUNDERSTORM. THIS THUNDERSTORM IS CAPABLE OF PRODUCING STRONG GUSTY SURFACE WINDS.. VERY HEAVY RAIN.. AND POSSIBLY SOME SMALL HAIL. MOST OF ALL... DEADLY LIGHTNING! IF OUT-OF-DOORS MOVE TO AN INSIDE SHELTER OR AUTOMOBILE. STAY OFF OF WATER AND AWAY FROM TREES... BOTH FREQUENT CONDUCTORS OF LIGHTNING. STAY AWAY FROM WINDOWS AND ELECTRIC APPLIAkNCES WHICH TO CAN CONDUCT ELECTRICITY. PLEASE REPORT STORM DAMAGE AND SEVERE WEATHER TO LAW ENFORCEMENT OFFICIALS AND ASK THEM TO RELAY THIS INFORMATION TO THE NATIONAL WEATHER SERVICE. ATTN: ISP DIST 1 PIERCE
Special weather statement, Jul 6, 5:35 PM CDT, 1 hour 48 minutes before
NATIONAL WEATHER SERVICE ROCKFORD IL SPECIAL WEATHER STATEMENT 530 PM CDT SUN JULY 6 1986 ... STRONG THUNDERSTORM ACROSS NORTHERN ILLINOIS ... AT 525 PM A STRONG THUNDERSTORMS WAS INDICATED ON RADAR ACROSS EAST CARROLL COUNTY NEAR LANARK OR 40 WEST OF ROCKFORD ON SOUTH TO JUST WEST OF PEORIA ILLINOIS. ANOTHER STRONG STORM WAS JUST SOUTH OF ROCKFORD. MOVEMENT WAS NORTHEAST AT 25 MPH. THE THUNDERSTORMS WILL BE MOVING NEAR THE COMMUNITIES OF DIXON.. FREEPORT.. OREGON.. BELVIDERE.. ROCHELLE.. DE KALB.. MILLEDGEVILLE.. THE GREATER ROCKFORD METRO AREA.. AND BYRON IN THE NEXT ONE OR TWO HOURS. THIS THUNDERSTORM IS CAPABLE OF PRODUCING STRONG GUSTY SURFACE WINDS.. VERY HEAVY RAIN.. POSSIBLY SOME SMALL HAIL.. MOST OF ALL... DEADLY LIGHTNING! IF OUT-OF-DOORS MOVE TO AN INSIDE SHELTER OR AUTOMOBILE. STAY OFF OF WATER AND AWAY FROM TREES... BOTH FREQUENT CONDUCTORS OF LIGHTNING. STAY AWAY FROM WINDOWS AND ELECTRIC APPLIANCES WHICH TO CAN CONDUCT ELECTRICITY. PLEASE REPORT STORM DAMAGE AND SEVERE WEATHER TO LAW ENFORCEMENT OFFICIALS AND ASK THEM TO RELAY THIS INFORMATION TO THE NATIONAL WEATHER SERVICE. ATTN: ISP DIST 1.. 2.. 16 PIERCE
Special weather statement, Jul 6, 6:05 PM CDT, 1 hour 18 minutes before
NATIONAL WEATHER SERVICE ROCKFORD IL SPECIAL WEATHER STATEMENT 603 PM CDT SUN JULY 6 1986 ...STRONG THUNDERSTORM HEADING FOR GREATER ROCKFORD METRO AREA... AT 600 PM A STRONG THUNDERSTORMS WERE INDICATED ON RADAR FROM EAST FREEPORT IL OR 25 WEST OF ROCKFORD ON SOUTH TO JUST WEST PEORIA ILLINOIS. ONE OF THE STRONGER STORMS WAS JUST EAST OF FREEPORT LLINOIS. ANOTHER STRONG STORM WAS JUST SOUTHEAST OF ROCKFORD. MOVEMENT WAS NORTHEAST AT 25 MPH. THE THUNDERSTORM JUST EAST OF ROCKFORD WILL BE MOVING ACROSS BOONE AND NORTHERN DEKALB COUNTIES IN THE NEXT HOUR.. AFFECTING BELVIDERE AND SYCAMORE AREAS. THE THUNDERSTORMS JUST WEST OF ROCKFORD WILL BE MOVING INTO THE ROCKFORD METRO AREA IN THE NEXT FEW MINUTES. THIS THUNDERSTORM IS CAPABLE OF PRODUCING STRONG GUSTY SURFACE WINDS.. VERY HEAVY RAIN.. POSSIBLY SOME SMALL HAIL.. MOST OF ALL... DEADLY LIGHTNING! IF OUT-OF-DOORS MOVE TO AN INSIDE SHELTER OR AUTOMOBILE. STAY OFF OF WATER AND AWAY FROM TREES... BOTH FREQUENT CONDUCTORS OF LIGHTNING. STAY AWAY FROM WINDOWS AND ELECTRIC APPLIANCES WHICH TO CAN CONDUCT ELECTRICITY. THE HEAVY RAIN PRODUCED BY THESE THUNDERSTORMS MAKE CAUSE SOME MINOR STREET.. DRAINAGE DITCH.. AND LOW AREA FLOODING. PLEASE REPORT STORM DAMAGE AND SEVERE WEATHER TO LAW ENFORCEMENT OFFICIALS AND ASK THEM TO RELAY THIS INFORMATION TO THE NATIONAL WEATHER SERVICE. ATTN: ISP DIST 1.. 2.. 16 PIERCE
Special weather statement, Jul 6, 6:37 PM CDT, 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 6 35 PM CDT SUN JUL 6 1986 AT 6 35 PM AN AREA OF VERY HEAVY THUNDERSTORMS WAS POISED JUST WEST OF THE CHICAGO AREA. THESE STORMS WERE ROUGHLY IN A LINE FROM FOX LAKE.. 45 MILES NORTHWEST OF THE LOOP.. TO PEORIA. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR. THEY WILL PASS THROUGH THE CHICAGO AREA BETWEEN 7 AND 10 PM THIS EVENING. THE STORMS WILL BE ACCOMPANIED BY STRONG WINDS WITH GUSTS TO 40 MILES AN HOUR AND AREAS OF HEAVY RAINFALL. SOMREK
Special weather statement, Jul 6, 6:45 PM CDT, 38 minutes before
NATIONAL WEATHER SERVICE ROCKFORD IL SPECIAL WEATHER STATEMENT 640 PM CDT SUN JULY 6 1986 ...STRONG THUNDERSTORMS MOVING ACROSS NORTHERN ILLINOIS... AT 638 PM A STRONG THUNDERSTORMS WERE INDICATED ON RADAR FROM NEAR ROCKFORD ON SOUTH TO JUST NEAR PEORIA ILLINOIS. ONE OF THE STRONGER STORMS WAS JUST NORTH OF ROCKFORD AND ANOTHER STRONG STORM WAS JUST SOUTHEAST OF ROCKFORD. MOVEMENT OF THE THUNDERSTORMS WAS NORTHEAST AT 25 MPH. THE PEAK WIND GUST WHEN THE STORMS MOVED OVER THE AIRPORT WAS 41 MPH.. AT 618 PM THE THUNDERSTORMS WILL BE MOVING ACROSS BOONE.. DEKALB.. EASTERN LEE AND EASTERN OGLE COUNTIES OF NORTH CENTRAL ILLINIOS. SOME OF THE COMMUNITIES AFFECTED BY THESE THUNDERSTORMS WILL BE.. BELVIDERE.. DEKALB.. ROCHELLE.. COMPTON.. SANDWICH.. AND WATERMAN THIS THUNDERSTORM IS CAPABLE OF PRODUCING STRONG GUSTY SURFACE WINDS.. VERY HEAVY RAIN.. POSSIBLY SOME SMALL HAIL.. MOST OF ALL... DEADLY LIGHTNING! IF OUT-OF-DOORS MOVE TO AN INSIDE SHELTER OR AUTOMOBILE. STAY OFF OF WATER AND AWAY FROM TREES... BOTH FREQUENT CONDUCTORS OF LIGHTNING. STAY AWAY FROM WINDOWS AND ELECTRIC APPLIANCES WHICH TO CAN CONDUCT ELECTRICITY. THE HEAVY RAIN PRODUCED BY THESE THUNDERSTORMS MAKE CAUSE SOME MINOR STREET.. DRAINAGE DITCH.. AND LOW AREA FLOODING. PLEASE REPORT STORM DAMAGE AND SEVERE WEATHER TO LAW ENFORCEMENT OFFICIALS AND ASK THEM TO RELAY THIS INFORMATION TO THE NATIONAL WEATHER SERVICE. ATTN: ISP DIST 1.. 2.. 16 PIERCE
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 7:04 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 26 min |
Nearby
Tornado Warnings in Illinois, 1986Every tornado warning in 1986Tornadoes in 1986
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.