Alert archive / Illinois / Tornado Warnings in 1993
Tornado Warning 3, NWS Chicago, IL
NWS Chicago, IL issued this tornado warning at Jun 8, 1993, 7:30 PM CDT for McHenry County, Illinois. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Jun 8, 1993, 7:30 PM CDT (00:30 UTC)
- Expired
- Jun 8, 1993, 8:00 PM CDT
- In force
- 30 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
County McHenry County, IL
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.5 hours before the alert went out and 241 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
- 4221 J/kg
- Mixed-layer CIN
- -161 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -3.5
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Jun 8, 5:07 PM CDT, 2 hours 23 minutes before
ILZ003-005-008-082315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 507 PM CDT TUE JUN 8 1993 ...TORNADO WATCH IN EFFECT FOR NORTHEAST ILLINOIS INCLUDING METROPOLITAN CHICAGO UNTIL 11 PM CDT... ...FLASH FLOOD WATCH IN EFFECT THIS EVENING AND TONIGHT FOR NORTHEAST ILLINOIS INCLUDING METROPOLITAN CHICAGO... AT 5 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED STRONG TO SEVERE THUNDERSTORMS DEVELOPING TO THE SOUTH OF THE CHICAGO AREA ACROSS KANKAKEE...IROQUOIS AND FORD COUNTIES. THESE STORMS WERE MOVING NORTHEAST AT 45 MPH AND WILL LIKELY SPREAD INTO THE FAR SOUTH SUBURBS OF WILL COUNTY AND LAKE COUNTY INDIANA BETWEEN 6 AND 630 PM CDT. THE ATMOSPHERE IS VERY UNSTABLE ACROSS ILLINOIS AND REMAINS FAVORABLE FOR EXPLOSIVE THUNDERSTORM DEVELOPMENT. THUNDERSTORMS WILL LIKELY BECOME SEVERE ACROSS MUCH OF NORTHEAST ILLINOIS THIS EVENING PRODUCING DAMAGING WINDS... LARGE HAIL...WITH TORNADOES POSSIBLE. ALSO...THE THUNDERSTORMS WILL LIKELY PRODUCE MORE LOCALLY HEAVY RAINFALL ACROSS NORTHEAST ILLINOIS AND METROPOLITAN CHICAGO RESULTING IN POSSIBLE FLASH FLOODING. REMEMBER A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS AND TORNADOES IN AND CLOSE TO THE WATCH AREA. IF YOU ARE IN OR CLOSE TO THE WATCH AREA BE ON THE LOOKOUT FOR THREATENING WEATHER AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. DARMOFAL
Special weather statement, Jun 8, 5:08 PM CDT, 2 hours 22 minutes before
ILZ003-005-008-082315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 507 PM CDT TUE JUN 8 1993 ...TORNADO WATCH IN EFFECT FOR NORTHEAST ILLINOIS INCLUDING METROPOLITAN CHICAGO UNTIL 11 PM CDT... ...FLASH FLOOD WATCH IN EFFECT THIS EVENING AND TONIGHT FOR NORTHEAST ILLINOIS INCLUDING METROPOLITAN CHICAGO... AT 5 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED STRONG TO SEVERE THUNDERSTORMS DEVELOPING TO THE SOUTH OF THE CHICAGO AREA ACROSS KANKAKEE...IROQUOIS AND FORD COUNTIES. THESE STORMS WERE MOVING NORTHEAST AT 45 MPH AND WILL LIKELY SPREAD INTO THE FAR SOUTH SUBURBS OF WILL COUNTY AND LAKE COUNTY INDIANA BETWEEN 6 AND 630 PM CDT. THE ATMOSPHERE IS VERY UNSTABLE ACROSS ILLINOIS AND REMAINS FAVORABLE FOR EXPLOSIVE THUNDERSTORM DEVELOPMENT. THUNDERSTORMS WILL LIKELY BECOME SEVERE ACROSS MUCH OF NORTHEAST ILLINOIS THIS EVENING PRODUCING DAMAGING WINDS... LARGE HAIL...WITH TORNADOES POSSIBLE. ALSO...THE THUNDERSTORMS WILL LIKELY PRODUCE MORE LOCALLY HEAVY RAINFALL ACROSS NORTHEAST ILLINOIS AND METROPOLITAN CHICAGO RESULTING IN POSSIBLE FLASH FLOODING. REMEMBER A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS AND TORNADOES IN AND CLOSE TO THE WATCH AREA. IF YOU ARE IN OR CLOSE TO THE WATCH AREA BE ON THE LOOKOUT FOR THREATENING WEATHER AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. DARMOFAL
Special weather statement, Jun 8, 5:43 PM CDT, 1 hour 47 minutes before
ILZ001-002-082345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 545 PM CDT TUE JUN 8 1993 ...TORNADO WATCH FOR ALL NORTHERN ILLINOIS TIL 11 CDT TONIGHT... ...FLASH FLOOD WATCH THROUGH TONIGHT... ALL OF NORTH CENTRAL AND NORTHHWEST ILLINOIS REMAIN THUNDERSTORM AND RAIN FREE THIS AFTERNOON AT 545 CDT. WE ARE KEEPING OUR EYE ON THUNDERSTORMS CURRENTLY GOING ON IN AND NEAR THE QUAD CITIES AS WELL AS STORM ACTIVITY LOCATED IN SOUTHEAST IOWA AROUND OTTUMWA. BOTH OF THESE AREAS OF THUNDERSTORMS WERE MOVING VERY RAPIDILY TO THE NORTHEAST AT 45 TO 50 MPH. STAY TUNED TO WEATHER RADIO FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS ON THIS EXTREMELY DANGEROUS WEATHER SITUATION.H FIELDS
Special weather statement, Jun 8, 5:45 PM CDT, 1 hour 45 minutes before
ILZ001-002-082345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 545 PM CDT TUE JUN 8 1993 ...TORNADO WATCH FOR ALL NORTHERN ILLINOIS TIL 11 CDT TONIGHT... ...FLASH FLOOD WATCH THROUGH TONIGHT... ALL OF NORTH CENTRAL AND NORTHHWEST ILLINOIS REMAIN THUNDERSTORM AND RAIN FREE THIS AFTERNOON AT 545 CDT. WE ARE KEEPING OUR EYE ON THUNDERSTORMS CURRENTLY GOING ON IN AND NEAR THE QUAD CITIES AS WELL AS STORM ACTIVITY LOCATED IN SOUTHEAST IOWA AROUND OTTUMWA. BOTH OF THESE AREAS OF THUNDERSTORMS WERE MOVING VERY RAPIDILY TO THE NORTHEAST AT 45 TO 50 MPH. STAY TUNED TO WEATHER RADIO FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS ON THIS EXTREMELY DANGEROUS WEATHER SITUATION. FIELDS
Special weather statement, Jun 8, 6:05 PM CDT, 1 hour 25 minutes before
ILZ001-002-082345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 605 PM CDT TUE JUN 8 1993 ...TORNADO WATCH FOR ALL NORTHERN ILLINOIS TIL 11 CDT TONIGHT... ...FLASH FLOOD WATCH THROUGH TONIGHT... THUNDERSTORMS WERE MOVING NORTHEAST OUT OF THE QUAD CITIES AREA TOWARD THE FOLLOWING NORTHWEST ILLINOIS COUNTIES AT 605 CDT THIS EVENING... CARROLL...WESTERN LEE...AND SOUTHWEST OGLE COUNTY. THE SPEED WAS ABOUT 45 TO 50 MPH. AS THESE STORMS PASSED THROUGH MOLINE WINDS GUSTED TO AROUND 30 MPH AND VERY HEAVY RAINS OCCURRED. THESE STORMS ARE MOVING IN TO A FAVORABLE AIRMASS FOR INTENSIFICATION. PERSONS IN CARROLL...LEE...AND OGLE COUNTY SHOULD BE ON THE LOOKOUT AS THESE STORMS APPROACH. MOVE INDOORS AWAY FROM WINDOWS. . ALL PERSONS HERE IN NORTHERN ILLINOIS SHOULD STAY TUNED TO WEATHER RADIO FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS ON THESE STORMS AND OTHERS THAT ARE EXPECTED THIS EVENING. FIELDS
Special weather statement, Jun 8, 6:08 PM CDT, 1 hour 22 minutes before
ILZ001-002-082345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 605 PM CDT TUE JUN 8 1993 ...TORNADO WATCH FOR ALL NORTHERN ILLINOIS TIL 11 CDT TONIGHT... ...FLASH FLOOD WATCH THROUGH TONIGHT... THUNDERSTORMS WERE MOVING NORTHEAST OUT OF THE QUAD CITIES AREA TOWARD THE FOLLOWING NORTHWEST ILLINOIS COUNTIES AT 605 CDT THIS EVENING... CARROLL...WESTERN LEE...AND SOUTHWEST OGLE COUNTY. THE SPEED WAS ABOUT 45 TO 50 MPH. AS THESE STORMS PASSED THROUGH MOLINE WINDS GUSTED TO AROUND 30 MPH AND VERY HEAVY RAINS OCCURRED. THESE STORMS ARE MOVING IN TO A FAVORABLE AIRMASS FOR INTENSIFICATION. PERSONS IN CARROLL...LEE...AND OGLE COUNTY SHOULD BE ON THE LOOKOUT AS THESE STORMS APPROACH. MOVE INDOORS AWAY FROM WINDOWS. . ALL PERSONS HERE IN NORTHERN ILLINOIS SHOULD STAY TUNED TO WEATHER RADIO FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS ON THESE STORMS AND OTHERS THAT ARE EXPECTED THIS EVENING. FIELDS
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 7:01 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 44 min |
| Jun 8, 8:00 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, McHenry | 60 min |
| Jun 8, 8:00 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 60 min |
Nearby
Tornado Warnings in Illinois, 1993Every tornado warning in 1993Tornadoes in 1993
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.