Alert archive / Illinois / Tornado Warnings in 1991
Tornado Warning 8, NWS Lincoln, IL
NWS Lincoln, IL issued this tornado warning at Apr 29, 1991, 7:41 PM CDT for DeKalb County, Lee County, Illinois. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Apr 29, 1991, 7:41 PM CDT (00:41 UTC)
- Expired
- Apr 29, 1991, 8:15 PM CDT
- In force
- 34 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties DeKalb County, IL, Lee County, IL
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.7 hours before the alert went out and 305 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
- 22 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 956 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 114 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 KRFD 300041
TORRFD
ILC103-037-300115-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ROCKFORD IL
741 PM CDT MON APR 29 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 815 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTH CENTRAL PART OF ILLINOIS
EASTERN LEE...DEKALB
AT 7 36 PM...A TORNADO WAS SIGHTED ON THE GROUND NEAR MENDOTA
IN LA SALLE COUNTY. THE STORMS WAS MOVING NORTHEAST AT 30 MPH.
UNCONFIRMED FUNNEL SIGHTING WAS ALSO BEING REPORTED IN THE PAW
PAW AREA.
SOME COMMUNITIES THAT WILL BE AFFECTED BY THIS TORNADO...
DE KALB...ROLLO...SANDWHICH
PERSONS IN THE PATH OF THIS DANGEROUS STORM TAKE COVER IMMEDIATELY
IN A BASEMENT OR SMALL CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR.
ABANDON CARS... FARM MACHINERY AND MOBILE HOMES FOR REINFORCED
BUILDING. IF OUT-OF-DOORS GO TO A REINFORCED SHELTER OR DITCH...
CULVERT OR RAVINE. THIS IS RA SERIOUS SITUATION... YOUR LIFE MAY
DEPEND ON HOW QUICKLY YOU RESPOND TO THIS TORNADO WARNING!
ATTN: ISP DIST 1..2. SANDERSWhat 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, Apr 29, 7:13 PM CDT, 28 minutes before
ILZ009-010-300115- SHORT TERM WEATHER FOR CENTRAL AND EASTCENTRAL ILLINOIS NATIONAL WEATHER SERVICE SPRINGFIELD IL 705 PM CDT MON APR 29 1991 A LINE OF STRONG THUNDERSTORMS HAVE DEVELOPED OVER CENTRAL ILLINOIS. THE LINE EXTENDED FROM JUST EAST OF SPRINGFIELD NORTH TO 30 MILES NORTHEAST OF PEORIA. THE STORMS WERE MOVING TO THE NORTH AT 30 MPH WHILE THE LINE WAS MOVING TO THE EAST AT 30 MPH. THE STRONGEST STORMS WERE LOCATED IN LOGAN COUNTY JUST EAST OF LINCOLN AND 10 MILES NORTHWEST AND 10 MILES SOUTHWEST OF MT PULASKI. THE STORMS WILL MOVE INTO DEWITT AND NORTHERN MACON COUNTIES BY 730 PM. DAMAGING WINDS...HAIL...VERY HEAVY RAIN AND DANGEROUS LIGHTNING MAY ACCOMPANY THESE STORMS. B E ALERT TO THE RAPIDLY CHANGING WEATHER CONDITIONS AND LISTEN FOR FURTHER UPDATES OR POSSIBLE WARNINGS. MUNDY ATTN ISP DIST...9...6...10
Special weather statement, Apr 29, 7:14 PM CDT, 27 minutes before
ILZ009-010-300115- SPECIAL WEATHER STATEMENT...CORRECTION... NATIONAL WEATHER SERVICE SPRINGFIELD IL 710 PM CDT MON APR 29 1991 A LINE OF STRONG THUNDERSTORMS HAVE DEVELOPED OVER CENTRAL ILLINOIS. THE LINE EXTENDED FROM JUST EAST OF SPRINGFIELD NORTH TO 30 MILES NORTHEAST OF PEORIA. THE STORMS WERE MOVING TO THE NORTH AT 30 MPH WHILE THE LINE WAS MOVING TO THE EAST AT 30 MPH. THE STRONGEST STORMS WERE LOCATED IN LOGAN COUNTY JUST EAST OF LINCOLN AND 10 MILES NORTHWEST AND 10 MILES SOUTHWEST OF MT PULASKI. THE STORMS WILL MOVE INTO DEWITT AND NORTHERN MACON COUNTIES BY 730 PM. DAMAGING WINDS...HAIL...VERY HEAVY RAIN AND DANGEROUS LIGHTNING MAY ACCOMPANY THESE STORMS. BE ALERT TO THE RAPIDLY CHANGING WEATHER CONDITIONS AND LISTEN FOR FURTHER UPDATES OR POSSIBLE WARNINGS. MUNDY ATTN ISP DIST...9...6...10
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 7:04 PM CDT | Tornado Warning | ILX | McLean, Woodford | 26 min |
| Apr 29, 7:33 PM CDT | Tornado Warning | ILX | McLean, Woodford | 27 min |
| Apr 29, 7:40 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Macon | 65 min |
| Apr 29, 7:40 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt | 65 min |
| Apr 29, 7:58 PM CDT | Tornado Warning | ILX | Boone | 32 min |
| Apr 29, 8:02 PM CDT | Tornado Warning | ILX | McLean | 58 min |
| Apr 29, 8:31 PM CDT | Tornado Warning | ILX | DeWitt, Piatt | 44 min |
Nearby
Tornado Warnings in Illinois, 1991Every tornado warning in 1991Tornadoes in 1991
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.