Alert archive / Illinois / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 21, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 8, 1993, 5:17 PM CDT for Will County, Illinois. It was in force for 43 min.
The area
The counties it named.
The facts
- Issued
- Jun 8, 1993, 5:17 PM CDT (22:17 UTC)
- Expired
- Jun 8, 1993, 6:00 PM CDT
- In force
- 43 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
County Will County, IL
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.3 hours before the alert went out and 338 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
- 750 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KCHI 082219 RRA SVRCHI ILC197-082300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE TDERSTORM WARNING NATIONAL WEATHER SERVICE CHICAGO IL 517 PM CDT TUE JUN 8 1993 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST ILLINOIS .RNADOES WITH LITTLE OR NO WARNING. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. BRUMER WWUS35 ,WWUS35 KP 082228?
What forecasters said that day
The local office's own words before this severe thunderstorm 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, 4:16 PM CDT, 1 hour 1 minute before
ILZ003-005-008-082215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 415 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 FOR THIS EVENING AND TONIGHT FOR NORTHEAST ILLINOIS INCLUDING METROPOLITAN CHICAGO... AT 4 10 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED NO THUNDERSTORMS IMMEDIATELY THREATENING THE CHICAGO AREA. HOWEVER...THUNDERSTORMS HAD DEVELOPED OVER CENTRAL ILLINOIS IN THE PAST HOUR TO THE SOUTH OF PEORIA AND NEAR BLOOMINGTON. THESE STORMS WERE MOVING NORTHEAST AT 45 MPH AND WILL LIKELY SPREAD INTO NORTHEAST ILLINOIS DURING THE NEXT SEVERAL HOURS. THE ATMOSPHERE IS VERY UNSTABLE THIS AFTERNOON ACROSS ILLINOIS AND REMAINS FAVORABLE FOR EXPLOSIVE THUNDERSTORM DEVELOPMENT. THUNDERSTORMS WILL LIKELY BECOME SEVERE ACROSS NORTHEAST ILLINOIS BY EARLY EVENING WITH DAMAGING WINDS...LARGE HAIL AND 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, 4:20 PM CDT, 57 minutes before
ILZ001-002-082215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 420 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 NORTHWEST ILLINOIS REMAIN FREE OF ANY THUNDER OR RAIN ACTIVITY AT 420 CDT THIS AFTERNOON. THE NEAREST ACTIVITY WAS IN NORTHEAST IOWA AND CENTRAL ILLINOIS. MOVEMENT WAS NORTHEAST AT 45 MPH. CONDITIONS REMAIN FAVORABLE AND CHANCES HIGH FOR DEVELOPMENT OF SEVERE WEATHER THROUGHOUT OUR AREA INTO THE LATE EVENING. STAY TUNED TO WEATHER RADIO FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS ON THIS EXTREMELY DANGEROUS WEATHER SITUATION. FIELDS
Special weather statement, Jun 8, 4:24 PM CDT, 53 minutes before
ILZ001-002-082215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 420 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 NORTHWEST ILLINOIS REMAIN FREE OF ANY THUNDER OR RAIN ACTIVITY AT 420 CDT THIS AFTERNOON. THE NEAREST ACTIVITY WAS IN NORTHEAST IOWA AND CENTRAL ILLINOIS. MOVEMENT WAS NORTHEAST AT 45 MPH. CONDITIONS REMAIN FAVORABLE AND CHANCES HIGH FOR DEVELOPMENT OF SEVERE WEATHER THROUGHOUT OUR AREA INTO THE LATE EVENING. STAY TUNED TO WEATHER RADIO FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS ON THIS EXTREMELY DANGEROUS WEATHER SITUATION. FIELDS
Special weather statement, Jun 8, 5:07 PM CDT, 10 minutes before
ILZ001-002-082345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 505 PM CDT TUE JUN 8 1993 ...TORNADO WATCH FOR ALL NORTHERN ILLINOIS TIL 11 CDT TONIGHT... ...FLASH FLOOD WATCH THROUGH TONIGHT... A COUPLE SMALL SHOWERS IN FAR NORTHWEST ILLINOIS WAS THE ONLY RAINFALL OCCURRING HERE IN NORTHERN ILLINOIS THIS AFTERNOON AT 505 CDT. THEY WERE MOVING RAPIDILY TO THE NORTHEAST AT 45 MPH. CONDITIONS REMAIN FAVORABLE AND CHANCES HIGH FOR DEVELOPMENT OF SEVERE WEATHER THROUGHOUT OUR AREA INTO THE LATE EVENING. STAY TUNED TO WEATHER RADIO FOR ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS ON THIS EXTREMELY DANGEROUS WEATHER SITUATION. FIELDS
Special weather statement, Jun 8, 5:07 PM CDT, 10 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, 9 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
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 2:00 AM CDT | Severe Thunderstorm Warning | LOT | Kankakee, Will | 45 min |
| Jun 8, 2:00 AM CDT | Severe Thunderstorm Warning | LOT | Livingston | 45 min |
| Jun 8, 2:25 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 65 min |
| Jun 8, 10:00 AM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee | 60 min |
| Jun 8, 4:53 PM CDT | Tornado Warning | LOT | Iroquois, Kankakee | 67 min |
| Jun 8, 5:42 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 63 min |
| Jun 8, 6:20 PM CDT | Tornado Warning | LOT | Cook | 40 min |
| Jun 8, 6:24 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Livingston | 51 min |
| Jun 8, 6:24 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 51 min |
| Jun 8, 6:39 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 36 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1993Every severe thunderstorm warning 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.