Alert archive / Illinois / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 21, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at May 25, 1994, 6:30 PM CDT for Will County, Illinois. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- May 25, 1994, 6:30 PM CDT (23:30 UTC)
- Expired
- May 25, 1994, 7:30 PM CDT
- In force
- 60 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, 11.5 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
- 598 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 22 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 252331 RRA SVRCHI ILC197-260030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHICAGO IL 630 PM CDT WED MAY 25 1994 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST ILLINOIS ...WILL COUNTY THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WILL COUNTY HAS BEEN EXTENDED TO INCLUDE ALL OF WILL COUNTY UNTIL 730 PM CDT. AT 625 PM CDT...DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM FROM JUST SOUTH OF SHOREWOOD TO JUST EAST OF YORKVILLE. MOVEMENT WAS EAST AT 35 TO 40 MPH. SOME TOWNS IN THE PATH OF THE STORM ARE JOLIET...ROMEOVILLE...CHANNAHON...MANHATTAN...NEW LENOX AND MONEE. SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. DARMOFAL
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, May 25, 5:52 PM CDT, 38 minutes before
ILZ005-006-012>014-019>023-032-033-039-252345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 552 PM CDT WED MAY 25 1994 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTHEAST ILLINOIS INCLUDING METROPOLITAN CHICAGO UNTIL 7 PM CDT... AT 545 PM...DOPPLER RADAR SHOWED THUNDERSTORMS WITH GUSTY WINDS MOVING ACROSS NORTHEAST LASALLE COUNTY. RADAR ESTIMATED WINDS OF 45 TO 50 MPH. THE LEADING EDGE OF THE GUSTY WINDS WILL MOVE INTO KENDALL COUNTY AND SOUTHERN KANE COUNTY BY 6PM. IF YOU LIVE IN NORTHEAST LASALLE COUNTY NORTH OF MARSEILLES...AS WELL AS WESTERN KENDALL AND SOUTHERN KANE COUNTIES PREPARE FOR STRONG GUSTY WINDS...BRIEF HEAVY DOWNPOURS OF RAIN AND POSSIBLY HAIL THROUGH 615 PM. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL IN AND CLOSE TO THE WATCH AREA. BE ON THE LOOKOUT FOR THEATENING WEATHER AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. DARMOFAL
Special weather statement, May 25, 5:52 PM CDT, 38 minutes before
ILZ005-006-012>014-019>023-032-033-039-252345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 552 PM CDT WED MAY 25 1994 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTHEAST ILLINOIS INCLUDING METROPOLITAN CHICAGO UNTIL 7 PM CDT... AT 545 PM...DOPPLER RADAR SHOWED THUNDERSTORMS WITH GUSTY WINDS MOVING ACROSS NORTHEAST LASALLE COUNTY. RADAR ESTIMATED WINDS OF 45 TO 50 MPH. THE LEADING EDGE OF THE GUSTY WINDS WILL MOVE INTO KENDALL COUNTY AND SOUTHERN KANE COUNTY BY 6PM. IF YOU LIVE IN NORTHEAST LASALLE COUNTY NORTH OF MARSEILLES...AS WELL AS WESTERN KENDALL AND SOUTHERN KANE COUNTIES PREPARE FOR STRONG GUSTY WINDS...BRIEF HEAVY DOWNPOURS OF RAIN AND POSSIBLY HAIL THROUGH 615 PM. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL IN AND CLOSE TO THE WATCH AREA. BE ON THE LOOKOUT FOR THEATENING WEATHER AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. DARMOFAL
Special weather statement, May 25, 6:15 PM CDT, 15 minutes before
ILZ001>004-007-008-010-011-260000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 615 PM CDT WED MAY 25 1994 ...SEVERE THUNDERSTORM WATCH FOR ALL OF NORTHWEST AND NORTH CENTRAL ILLINOIS HAS BEEN CANCELED... AT 6 10 PM CDT...RADAR INDICATED ALL THUNDERSTORMS MOVING EAST OF BOONE AND DE KALB COUNTIES. ONLY LIGHT SHOWERS NOW REMAIN SCATTERED SOUTH OF A GALENA TO DE KALB LINE IN NORTHWEST AND NORTH CENTRAL ILLINOIS. ALTHOUGH MORE SHOWERS AND THUNDERSTORMS COULD REENTER NORTHWEST ILLINOIS FROM NORTHERN IOWA LATER THIS EVENING...CONDITIONS AT PRESENT DO NOT FAVOR ANY MORE SEVERE WEATHER. THEREFORE...THE SEVERE THUNDERSTORM WATCH FOR JO DAVIESS...STEPHENSON...WINNEBAGO... BOONE...CARROLL..OGLE...LEE AND DE KALB COUNTIES HAS BEEN CANCELED. SANDERS SANDERS ...RESENT WITH SLIGHT CORRECTION TO TEXT...
Special weather statement, May 25, 6:15 PM CDT, 15 minutes before
ILZ001>004-007-008-010-011-260000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 615 PM CDT WED MAY 25 1994 ...SEVERE THUNDERSTORM WATCH FOR ALL OF NORTHWEST AND NORTH CENTRAL ILLINOIS HAS BEEN CANCELED... AT 6 10 PM CDT...RADAR INDICATED ALL THUNDERSTORMS MOVING EAST OF BOONE AND DE KALB COUNTIES. ONLY LIGHT SHOWERS NOW REMAIN SCATTERED SOUTH OF A GALENA TO DE KALB LINE IN NORTHWEST AND NORTH CENTRAL ILLINOIS. ALTHOUGH MORE SHOWERS AND THUNDERSTORMS COULD REENTER NORTHWEST ILLINOIS FROM NORTHERN IOWA LATER THIS EVENING...CONDITIONS AT PRESENT DO NOT FAVOR ANY MORE SEVERE WEATHER. THEREFORE...THE SEVERE THUNDERSTORM WATCH FOR JO DAVIESS...STEPHENSON...WINNEBAGO... BOONE...CARROLL..OGLE...LEE AND DE KALB COUNTIES HAS BEEN CANCELED. SANDERS SANDERS ...RESENT WITH SLIGHT CORRECTION TO TEXT...
Special weather statement, May 25, 6:17 PM CDT, 13 minutes before
ILZ001>004-007-008-010-011-260000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 617 PM CDT WED MAY 25 1994 ...SEVERE THUNDERSTORM WATCH FOR ALL OF NORTHWEST AND NORTH CENTRAL ILLINOIS HAS BEEN CANCELED... AT 6 10 PM CDT...RADAR INDICATED ALL THUNDERSTORMS MOVING EAST OF BOONE AND DE KALB COUNTIES. ONLY LIGHT SHOWERS NOW REMAIN SCATTERED SOUTH OF A GALENA TO DE KALB LINE IN NORTHWEST AND NORTH CENTRAL ILLINOIS. ALTHOUGH MORE SHOWERS AND THUNDERSTORMS COULD REENTER NORTHWEST ILLINOIS FROM NORTHERN IOWA LATER THIS EVENING...CONDITIONS AT PRESENT DO NOT FAVOR ANY MORE SEVERE WEATHER. THEREFORE...THE SEVERE THUNDERSTORM WATCH FOR JO DAVIESS...STEPHENSON...WINNEBAGO... BOONE...CARROLL..OGLE...LEE AND DE KALB COUNTIES HAS BEEN CANCELED. SANDERS
Special weather statement, May 25, 6:17 PM CDT, 13 minutes before
ILZ001>004-007-008-010-011-260000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 617 PM CDT WED MAY 25 1994 ...SEVERE THUNDERSTORM WATCH FOR ALL OF NORTHWEST AND NORTH CENTRAL ILLINOIS HAS BEEN CANCELED... AT 6 10 PM CDT...RADAR INDICATED ALL THUNDERSTORMS MOVING EAST OF BOONE AND DE KALB COUNTIES. ONLY LIGHT SHOWERS NOW REMAIN SCATTERED SOUTH OF A GALENA TO DE KALB LINE IN NORTHWEST AND NORTH CENTRAL ILLINOIS. ALTHOUGH MORE SHOWERS AND THUNDERSTORMS COULD REENTER NORTHWEST ILLINOIS FROM NORTHERN IOWA LATER THIS EVENING...CONDITIONS AT PRESENT DO NOT FAVOR ANY MORE SEVERE WEATHER. THEREFORE...THE SEVERE THUNDERSTORM WATCH FOR JO DAVIESS...STEPHENSON...WINNEBAGO... BOONE...CARROLL..OGLE...LEE AND DE KALB COUNTIES HAS BEEN CANCELED. SANDERS
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 4:25 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 50 min |
| May 25, 6:17 PM CDT | Severe Thunderstorm Warning | LOT | Kendall | 28 min |
| May 25, 6:17 PM CDT | Severe Thunderstorm Warning | LOT | Will | 43 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1994Every severe thunderstorm warning in 1994
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.